Re: Closing XTerm causes the GTK app to exit, inspite of disown/nohup on its PID - why?
Wild guess; use strace to look for a signal at the time the window is closed, and add code to replace the handler for the signal. For instance, to handle Ctrl+C gracefully in Python that uses GTK, some of my code does this; GLib.unix_signal_add(GLib.PRIORITY_DEFAULT, signal.SIGINT, callback) -- James Cameron http://quozl.netrek.org/ ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Re: GTK window winthout main iterator
Add your logic to a function given to glib_idle_add(), and to trigger new drawings call queue_draw and then return from your function. GTK+ will call your draw signal handler. As soon as GTK+ is idle again, your function will be called again. It isn't the usual way of doing things, but it will work. On Tue, Sep 04, 2018 at 07:09:13PM -0300, Juan Ignacio Donoso via gtk-app-devel-list wrote: > I'm trying to create a GUI using gtk I already have a loop that runs my > logic. I was using cairo to draw to a png and flush to /dev/fb0 but now I > want to instantiate a Gtk::Window to draw on it. > > I don't want to run Gtk::Main because just want to trigger new drawings > when my logic trigger it.. > The app is real only there aren't going to be any interactions from the app > ui, only from the internal logic I want to draw. > > Any idea where to look to implement that approach. I was thinking on using > Gtk::main_iteration_do with Gtk::Queue_draw. But I'm not getting it work. > > Do I need to ask for a cairo context on every on_draw signal call? > Do I need to "draw" on the "draw" signal? > > thanks > ___ > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list -- James Cameron http://quozl.netrek.org/ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: XTestFakeKeyEvent GDK-equivalent
For quick hacks or testing apps, I use xdotool. I've no idea if it works with Wayland though. -- James Cameron http://quozl.netrek.org/ ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Re: trouble with g_stat
On Sun, Jun 03, 2018 at 10:27:48PM -0400, GaryW wrote:
> My use of g_stat causes a segfault, but regular stat works ok. I’m using
> mingw64 on Win10 under msys2.
> [...]
>
> GString *fspec;
>
> GStatBuf *stBuf;
>
> //fspec->str tested to hold the correct file spec…
>
> if(g_stat(fspec->str,stBuf)<0){… [9476 Segmentation fault]
stBuf is an uninitialised pointer. g_stat will try to write to the
address; undefined behaviour results.
Try allocating some memory of the right size, and assign that address
to the pointer before calling g_stat?
--
James Cameron
http://quozl.netrek.org/
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Re: PyGObject: pep8 konform
Code that uses PyGObject can't be PEP8 conformant without generating version warnings. My practice is to minimise E402 by moving imports, then add .flake8 file with; [flake8] # E402 module level import not at top of file # gi.require_version() is required before later imports ignore = E402 -- James Cameron http://quozl.netrek.org/ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Is it possible to catch ALT+TAB and do nothing
On Mon, May 07, 2018 at 05:03:40PM -0500, Igor Korot wrote: > James, > > On Mon, May 7, 2018 at 4:46 PM, James Cameron <qu...@laptop.org> wrote: > > On Mon, May 07, 2018 at 04:27:57PM -0500, Igor Korot wrote: > >> Paul et al, > >> Any idea how to configure FVWM to not to give focus to xterm if one > >> specific window is displayed? > > > > You might ask on an fvwm mailing list, but fvwm does have a > > NeverFocus method that can be applied to an application such as xterm. > > Yes, just subscribed to their forum and will ask that question. > > > > http://www.fvwm.org/documentation/manpages/fvwm.html > > > > But that would just fix your problem for xterm; to enforce focus for a > > lock screen, there's more to do. Have a look at the code for other > > lock screens to find out what that is. > > We do not provide any external application where the user can interact > with the keyboard/focus handling > in order to try and guess the information that should be secured. > Only the xterm is a concern. If this is an embedded system or kiosk application, replace xterm with something of your own making that uses libvte as a widget. That way you can assert full control over when the widget is visible. I've found VTE acceptable for most use cases I've thrown at it. Though I still use xterm when I can. > [...] -- James Cameron http://quozl.netrek.org/ ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Re: Is it possible to catch ALT+TAB and do nothing
On Mon, May 07, 2018 at 04:27:57PM -0500, Igor Korot wrote:
> Paul et al,
> Any idea how to configure FVWM to not to give focus to xterm if one
> specific window is displayed?
You might ask on an fvwm mailing list, but fvwm does have a
NeverFocus method that can be applied to an application such as xterm.
http://www.fvwm.org/documentation/manpages/fvwm.html
But that would just fix your problem for xterm; to enforce focus for a
lock screen, there's more to do. Have a look at the code for other
lock screens to find out what that is.
Briefly, make a global mouse and keyboard grab, subscribe to window
visibility events, and when they occur raise the window above whatever
was stacked on top of it.
You could also adjust xterm sources to ask for focus skip; bit 0 of
_WIN_HINTS property.
>
> I tried:
>
> [code]
> Key Tab A M WindowList("!xterm")
> [/code]
>
> but it doesn't work.
>
> Thank you.
>
>
> On Mon, May 7, 2018 at 12:44 PM, Paul Davis <p...@linuxaudiosystems.com>
> wrote:
> > the window manager can intervene to catch more or less any key combinations
> > the user has told it to be interested in. if the user told it use Alt-Tab
> > for focus switching, it will catch that. you can't stop it.
> >
> > On Mon, May 7, 2018 at 12:52 PM, Igor Korot <ikoro...@gmail.com> wrote:
> >>
> >> Hi, Paul,
> >>
> >> On Mon, May 7, 2018 at 11:42 AM, Paul Davis <p...@linuxaudiosystems.com>
> >> wrote:
> >> > If there is a window manager (and there just about always is), you can't
> >> > stop it from doing what it is configured to do. You're just an
> >> > application,
> >> > and it takes higher priority managing window events than you.
> >>
> >> Yes, we are using FVWM as WM.
> >> I got a suggestion to write a function for this WM to stop the
> >> Terminal to appear
> >> when our Lock Screen is active, but here no one is familiar enough with
> >> this WM
> >> to write such a function.
> >>
> >> And I guess a different route is just not possible.
> >>
> >> And I would also guess that even if I put the "stay on top" flag,
> >> pressing the ALT+TAB will
> >> definitely switch the focus. Am I correct?
> >>
> >> Thank you.
> >>
> >> >
> >> > On Mon, May 7, 2018 at 12:01 PM, Igor Korot <ikoro...@gmail.com> wrote:
> >> >>
> >> >> Hi, ALL,
> >> >> Is it possible to catch the ALT+TAB when one particular window is
> >> >> displayed and do nothing, i.e. not switch to a different window?
> >> >>
> >> >> We have a program which displays a full sized window without the
> >> >> title. Its role is to Lock screen" - user should not be able to do
> >> >> anything until (s)he supplies password and hit the "Authenticate"
> >> >> button.
> >> >> problem is that t is possible to hit "ALT+TAB" and switch the focus to
> >> >> the window below it (such as Terminal) and type something.
> >> >>
> >> >> We also can't use the lock screen window because of some other issues.
> >> >>
> >> >> So is it possible to catch ALT+TAB and do nothing for one specific
> >> >> window?
> >> >>
> >> >> On the side note - is there a better list (with more traffic) where I
> >> >> can post question like this? Or this list is still good and
> >> >> operational?
> >> >>
> >> >> Thank you.
> >> >> ___
> >> >> gtk-list mailing list
> >> >> gtk-list@gnome.org
> >> >> https://mail.gnome.org/mailman/listinfo/gtk-list
> >> >
> >> >
> >
> >
> ___
> gtk-list mailing list
> gtk-list@gnome.org
> https://mail.gnome.org/mailman/listinfo/gtk-list
--
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http://quozl.netrek.org/
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RE: EXTERNAL: stdout/sterr to GtkTextView at runtime
Yeah, buffering can be a sticky issue. At a minimum, the sender needs to turn
it off. In your test_output.pl, you should do something like this on the file
handle to which you’re writing,
use IO::Handle;
$fh->autoflush(TRUE);
which you might see done this way,
$fhPrev=select($fh);
$|=TRUE;
select($fhPrev);
or with an older idiom for maximum compactness/obfuscation,
select((select($fh),$|=TRUE)[0]);
or with an I/O layer.
binmode($fh,”:unix”) or die “Unable to binmode: $!.\n”;
Good luck.
Jim
From: Williams, James P2 (US)
Sent: Friday, December 11, 2015 11:38 AM
To: 'orangensa...@web.de' <orangensa...@web.de>; 'gtk-perl-list@gnome.org'
<gtk-perl-list@gnome.org>
Subject: RE: EXTERNAL: stdout/sterr to GtkTextView at runtime
One way to deal with this is to open a pipe to the program instead of using
backticks.
use Glib qw(TRUE FALSE);
use IO::File;
...
my($cmd)=”/usr/bin/perl test_output.pl”;
my($fh)=new IO::File(“$cmd 2>&1 |”);
die “$0: Unable to open pipe from $cmd: $!.\n” if !$fh;
Then, add a function to be called when input is available on that file handle.
my($io)=Glib::IO->add_watch($fh->fileno(),[qw(in hup)],sub
{ioCB($fh,$cmd,@_)});
where the callback would read the file handle, and append what it gets to your
widget.
sub ioCB
{
my($fh,$cmd,$fd,$cond)=@_;
my(@lines,$done);
if ($cond & ‘hup’) {
@lines=$fh->getlines();
$done=TRUE;
} elsif ($cond & ‘in’) {
@lines=($fh->getline()); #read only one line; may block if we try more
}
if (@lines) {
...
$buf->insert($buf->get_end_iter(),join ‘’,@lines);
...
}
if ($done && !$fh->close()) {
showError($!
? “Unable to close pipe to $cmd: $!.”
: “Got non-zero exit status from $cmd, $?.”);
}
return !$done; #i.e., keep IO channel if not at EOF
}
$io in the earlier code can be used to remove the callback later, or you can
just return FALSE from the callback, as I do above. You can get more details
in the Glib::MainLoop docs and those for the C bindings that module wraps.
Another way to deal with this is to do blocking reads in a separate thread, but
if your Perl skills are weak, I’d go with this simpler IO channel approach.
Good luck.
Jim
From: gtk-perl-list [mailto:gtk-perl-list-boun...@gnome.org] On Behalf Of
orangensa...@web.de<mailto:orangensa...@web.de>
Sent: Thursday, December 10, 2015 11:14 PM
To: gtk-perl-list@gnome.org<mailto:gtk-perl-list@gnome.org>
Subject: EXTERNAL: stdout/sterr to GtkTextView at runtime
Hi,
I'm writing a gui for an existing program that can run for a while. I want to
display all possible terminal output of this program in a GtkTextView. So far i
failed to display the output at runtime. I tried this
my $iter = $textbuffer->get_end_iter;
my $command = `perl test_output.pl 2>&1`;
$textbuffer->insert($iter, $command);
which isn't working the way i want. My program is blocked while test_output.pl
is running. I tried to use
my $command = system("perl test_output.pl 2>&1 &");
instead but while my program keeps running, all output is shown in the terminal
again.
How can i achieve to get all output at runtime in my textview? And how do i
check if test_output is done running? I found an old solution using Gtk+ itself
but my perl skills aren't good enough to reproduce this:
https://mail.gnome.org/archives/gtk-list/2006-February/msg00040.html
I'm using Gtk3.
Thanks for any help.
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enchant and gtk
Hey all! Does anybody have a copy of webkitgtk compiled without enchant, (via the cmake flag, DENABLE_SPELLCHECK=OFF)? or would anybody be willing to compile one for me? I'm on a laptop with a single-core and 1.9Gb RAM, so I did start the compile process, but it's just a little long! Is there anything else in the GNOME 3 environment that won't launch without libenchant, besides the gnome browser? I noticed the welcome app that lets you choose your launguage/keyboard/wifi settings won't launch, nor the system settings. I didn't know if that was due to webkitgtk as well. Thanks Regards, James ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Re: enchant and gtk
When trying to build myself, make freezes at Scanning dependencies of target WebCore Any help would be appreciated! On Jul 31, 2015 4:39 PM, James Stortz james.ryan.sto...@gmail.com wrote: Hey all! Does anybody have a copy of webkitgtk compiled without enchant, (via the cmake flag, DENABLE_SPELLCHECK=OFF)? or would anybody be willing to compile one for me? I'm on a laptop with a single-core and 1.9Gb RAM, so I did start the compile process, but it's just a little long! Is there anything else in the GNOME 3 environment that won't launch without libenchant, besides the gnome browser? I noticed the welcome app that lets you choose your launguage/keyboard/wifi settings won't launch, nor the system settings. I didn't know if that was due to webkitgtk as well. Thanks Regards, James ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Re: GDBusProxy missing bus signals during construction
On 24/07/15 12:26, Bastien Nocera wrote: On Thu, 2015-07-23 at 21:59 +0100, Roger James wrote: snip I propose to get this by round this by subscribing to the Avahi ItemNew signal on my AvahiServer proxy to catch the updates and then unscribing it after I have connected the gobject signal on the 'AvahiServiceBrowser' proxy. Even just typing that makes ny head hurt! I have no idea how that will play in the heavily multi-threaded enviroment this is eventually to be deployed in. I will post the new code back here for posterity later. Or fix Avahi directly? https://github.com/lathiat/avahi/issues/9 That will all save us time in the long run... Hi Bastien, I am really annoyed that that link did not come up all my searching. It would have saved me a lot of investigation. I suppose I did not look at the avahi issues list because I did not think the api could have have been designed that way. To old stagers like me a server that communicates with clients via api that potentially works over a network (internal or external) cannot rely on partners doing things in a time-scale dictated by a server. I will post a link to my work on that thread. But you are correct, it needs fixing. However it has been around a long time and it will need to be fixed in a way that does not break any existing applications. Roger Roger Roger ___ gtk-devel-list mailing list gtk-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: GDBusProxy missing bus signals during construction
On 24/07/15 12:23, Simon McVittie wrote: On 23/07/15 21:59, Roger James wrote: I propose to get this by round this by subscribing to the Avahi ItemNew signal on my AvahiServer proxy to catch the updates and then unscribing it after I have connected the gobject signal on the 'AvahiServiceBrowser' proxy. org.freedesktop.Avahi.Server does not appear to have an ItemNew signal. I would recommend dropping down to a lower-level API than proxy objects: using Gio.DBusConnection.signal_subscribe() to match ItemNew signals at *any* object path (use None for the object path parameter). Simon, I was a bit sloppy when I typed this. I should have said on the DBusConnection used by my AvahiServer proxy. Sorry. The latest version of the code is at https://github.com/rogerjames99/unicornemu/blob/master/avahibrowser.py It seems to run reasonably well. If will now look at integrating it into the rest of the stuff. Roger ___ gtk-devel-list mailing list gtk-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: GDBusProxy missing bus signals during construction
On 23/07/15 20:50, Simon McVittie wrote: On 23/07/15 15:01, Roger James wrote: I am trying to implement a Zeroconf service browser using a PyGobject Gio.DBusProxy object to talk to avahi. It all works fine but the browser randomly misses the initial one or more ItemNew signals from the avahi server. It sometimes even misses the AllForNow signal. Subsequent ItemNew signals are seen OK as services come and go. In general, you cannot rely on seeing signals from the past. Signals on D-Bus are not specifically for you; they are broadcasts to everyone, and might indeed have happened already. What you're seeing is a race condition: by the time your code receives the object path and uses it to create a Gio.DBusProxy which subscribes to signals, you might already have missed some signals. The conventional pattern for D-Bus looks something like this pseudocode: * let initialized = False * subscribe to signals with a callback like this: on ItemNew signal: if initialized: print(got a new item) * call a state-recovery method - perhaps it's called GetItems or something - to catch up on anything you missed, with a callback like this: on reply from GetItems: let initialized = True for item in reply: print(got a new item) 1. How can I stop this happening. If Avahi's ServiceBrowser objects have a way to catch up, i.e. download the current state, then use it as described in my pseudocode. If they don't, then Gio.DBusProxy cannot represent this API successfully, and you will have to use lower-level functions like GIO.DBusConnection.signal_subscribe to subscribe to the signals in general, before you call ServiceBrowserNew; and then in the signal callback, use the sending object path of the signals to associate them with a particular service browser object. 2. Is avahi breaking some sort of dbus protocol or convention in sending these signals immediately a new bus connection is made? If there is a way to catch up, that's conventional. If there is no way to catch up, then Avahi is being unconventional here. 3. Is the a flaw in the GDBusProxy design/documenation? (sorry guys, but have spent a while looing at this.) If there is no way to catch up, then you would have the same problems with any proxy-object-oriented binding, such as the ones in dbus-python, dbus-glib and QtDBus. I'm only not including libdbus in that list because its only way to subscribe to signals is analogous to the lower-level Gio.DBusConnection.signal_subscribe API. Hi Simon, Hi Andrejs The AvahiServer object (proxy) is responding to the call to it's ServiceBrowserNew method by sending back the 'path' you should connect to and create an AvahiServiceBrowser proxy object on. This is immediately followed by a broadcast of the 'catch up' information. So I guess it is a problem with Avahi, because it is obvious that it is purely chance if you manage to create the AvahiServiceBrowser proxy in time to get the update. I propose to get this by round this by subscribing to the Avahi ItemNew signal on my AvahiServer proxy to catch the updates and then unscribing it after I have connected the gobject signal on the 'AvahiServiceBrowser' proxy. Even just typing that makes ny head hurt! I have no idea how that will play in the heavily multi-threaded enviroment this is eventually to be deployed in. I will post the new code back here for posterity later. Roger ___ gtk-devel-list mailing list gtk-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-devel-list
GDBusProxy missing bus signals during construction
I am trying to implement a Zeroconf service browser using a PyGobject
Gio.DBusProxy object to talk to avahi. It all works fine but the browser
randomly misses the initial one or more ItemNew signals from the avahi
server. It sometimes even misses the AllForNow signal. Subsequent
ItemNew signals are seen OK as services come and go.
It appears that the problem is that the GLIb objects subscribes to the
dbus signals during the construction process (the DO_NOT_CONNECT_SIGNALS
is not set). It then notifies(GDbusProxy.new) or
returns(GDBusProxy.new_sync) to the calling object. Once I get the new
proxy object back I can use connect on the parent gobject to hook the
incoming dbus signal to my applications signal handling callback.
However any dbus signals that arrive from server (avahi) before that
connection is made are discarded. If set DO_NOT_CONNECT_SIGNALS I would
have mimic the whole of DBusProxy/DBUsConection's handling of dbus side
signal mapping. I don't want to have to do that. What am I missing?
Some fundamental questions are.
1. How can I stop this happening.
2. Is avahi breaking some sort of dbus protocol or convention in sending
these signals immediately a new bus connection is made?
3. Is the a flaw in the GDBusProxy design/documenation? (sorry guys, but
have spent a while looing at this.)
Thanks,
Roger
Here is my python code
#!/usr/bin/env python
from gi.repository import Gio, GLib, GObject, Gtk
import avahi
import signal
import time
class avahibrowser(Gio.Application):
def service_resolved(self, *args):
print 'service resolved'
print 'name:', args[2]
print 'address:', args[7]
print 'port:', args[8]
def print_error(self, *args):
print 'error_handler'
print args[0]
def browserCallback(self, proxy, sender, signal, args):
if signal == 'ItemNew':
# Arguments are [0] i interface, [1] i protocol [2] s name [3] s
type [4] s domain [5] u flags
print Found service '%s' type '%s' domain '%s' % (args[2],
args[3], args[4])
#self.avahiserver.ResolveService('iisssiu',
#args[0], # Interface
#args[1], # Protocol
#args[2], # Name
#args[3], # Service Type
#args[4], # Domain
#avahi.PROTO_UNSPEC, dbus.UInt32(0),
#reply_handler=self.service_resolved,
error_handler=self.print_error)
else:
print 'signal', signal, 'arguments', args
def do_activate(self): # Define this to suppress glib warning
pass
def new_browser_proxy_callback(self, source_object, res, user_data):
#source_object.connect('g-signal', self.browserCallback)
self.avahibrowser = Gio.DBusProxy.new_finish(res)
self.avahibrowser.connect('g-signal', self.browserCallback)
def new_server_proxy_callback(self, source_object, res, user_data):
self.avahiserver = Gio.DBusProxy.new_finish(res)
avahibrowserpath = self.avahiserver.ServiceBrowserNew('(iissu)',
avahi.IF_UNSPEC,
avahi.PROTO_INET,
'_scratch._tcp',
'local',
0)
Gio.DBusProxy.new(self.systemDBusConnection, 0, None,
avahi.DBUS_NAME,
avahibrowserpath,
avahi.DBUS_INTERFACE_SERVICE_BROWSER, None,
self.new_browser_proxy_callback,
None)
def bus_get_callback(self, source_object, res, user_data):
self.systemDBusConnection = Gio.bus_get_finish(res)
Gio.DBusProxy.new(self.systemDBusConnection, 0, None,
avahi.DBUS_NAME,
avahi.DBUS_PATH_SERVER,
avahi.DBUS_INTERFACE_SERVER, None,
self.new_server_proxy_callback,
None)
# Gnome application initialization routine
def __init__(self, application_id, flags):
Gio.Application.__init__(self, application_id=application_id,
flags=flags)
Gio.bus_get(Gio.BusType.SYSTEM, None, self.bus_get_callback, None)
def InitSignal(app):
def signal_action(signal):
if signal is 1:
print(Caught signal SIGHUP(1))
elif signal is 2:
print(Caught signal SIGINT(2))
elif signal is 15:
print(Caught signal SIGTERM(15))
app.release()
def idle_handler(*args):
print(Python signal handler activated.)
GLib.idle_add(signal_action, priority=GLib.PRIORITY_HIGH)
def handler(*args):
print(GLib signal handler
RE: EXTERNAL: Re: Gtk2::SpinButton For Hex
Looks like twisting the implementation of the standard Spinbutton widget is not quite easy to be achieved - maybe my alternative is quicker to put to effective use. Yeah, I've toyed with doing something along these lines, using other widgets to create a poor man's spin button. My hex inputs use Gtk2::CellRendererSpins in a Gtk2::TreeView, but I think the same thing could be done. It's good to see an implementation if this idea, and I wasn't aware of the icon attributes Gtk2::Entry provides. Thanks for posting your implementation. Jim ___ gtk-perl-list mailing list gtk-perl-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-perl-list
RE: EXTERNAL: Re: Gtk2::SpinButton For Hex
How can I use a Gtk2::SpinButton to prompt for an integer expressed in
hex? I've tried the following, but it fails.
...
The text appears to be correct while I hold either arrow button down; I
see hex values incrementing. However, single clicks of an arrow button
fail if the displayed text contains A-F. Hitting the Enter key also
fails on the same values. In both cases, the text changes to a decimal
integer.
What do the '$value's look like in the outputCB (either in a debugger or
...).
With single clicks of the up arrow button, the values in outputCB()
increment from 0 to 10. 10 correctly displays as A. One more click of the
up arrow calls outputCB() twice for some reason, the first time with a
value of 0, and the second with a value of 1. So visibly, 10 wraps to 1
instead of 11, or B. If I manually type 'FF' and hit the Enter key,
outputCB() is called with a value of 0. I've played with callbacks on the
'input' and 'changed' signals too, but nothing has worked so far.
I learned something else. If I change the sprintf() to use '0x%X' instead
of '%X', it seems to work. It also works in octal with '0%o' and binary
with '0b%b'.
Unfortunately, the '0x' prefix is unacceptable to my users. Grr. So I'm
still in search of a way to spin a hex value, but with no '0x'. Knowing
this about the prefix, though, still may be useful to others wanting
something similar.
Hi Jim
If that is the case can you not use chain the sprintf through substr?
e.g.
$spin-set_text(substr (sprintf '0x%X',$value), 2);
which will drop the first 2 characters of the string that is printed by
sprintf?
That's the same as what I had originally, which failed.
$spin-set_text(sprintf('%X',$value));
Gtk2::SpinButton seems to spin hex values fine if the 0x is in the string.
Your substr() version and my original fail, I think, because the 0x is
missing. My users, of course, don't want to type the 0x since the input is
always hex, and it's really a programming convention; not something for a user
interface.
Thanks.
Jim
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RE: EXTERNAL: Re: Gtk2::SpinButton For Hex
How can I use a Gtk2::SpinButton to prompt for an integer expressed in hex?
I've tried the following, but it fails.
...
The text appears to be correct while I hold either arrow button down; I see
hex values incrementing. However, single clicks of an arrow button fail if
the displayed text contains A-F. Hitting the Enter key also fails on the
same values. In both cases, the text changes to a decimal integer.
What do the '$value's look like in the outputCB (either in a debugger or ...).
With single clicks of the up arrow button, the values in outputCB() increment
from 0 to 10. 10 correctly displays as A. One more click of the up arrow
calls outputCB() twice for some reason, the first time with a value of 0, and
the second with a value of 1. So visibly, 10 wraps to 1 instead of 11, or B.
If I manually type 'FF' and hit the Enter key, outputCB() is called with a
value of 0. I've played with callbacks on the 'input' and 'changed' signals
too, but nothing has worked so far.
I learned something else. If I change the sprintf() to use '0x%X' instead of
'%X', it seems to work. It also works in octal with '0%o' and binary with
'0b%b'.
Unfortunately, the '0x' prefix is unacceptable to my users. Grr. So I'm still
in search of a way to spin a hex value, but with no '0x'. Knowing this about
the prefix, though, still may be useful to others wanting something similar.
sprint - should be sprintf?
Sorry about the sprint. We're on a closed network; that was a transcription
typo.
Maybe try set_value or set_digits rather than set_text?
I think I have to call set_text() to see the hex version in the entry. I have
tried calling set_value() too, both before and after set_text(). That gives me
the same behavior: spinning seems to work, but single clicks wrap to 0 or 1 as
soon as I reach a number containing [A-F]+.
On set_digits(), I'm spinning integers, so I've left it at the default, 0. It
wouldn't make sense being any other value, if I understand its purpose.
How are any of these impacted by the set_numeric statement?
I've set this to FALSE, since I have to allow A-F to be typed into the entry.
Otherwise, those key events are ignored.
Thanks for any other ideas you may have.
Jim
-Original Message-
From: Robert Wilkinson [mailto:b...@fourtheye.org]
Sent: Wednesday, May 20, 2015 3:12 AM
To: Williams, James P2
Cc: 'gtk-perl-list@gnome.org'
Subject: EXTERNAL: Re: Gtk2::SpinButton For Hex
On Tue, May 19, 2015 at 10:22:51PM +, Williams, James P2 wrote:
How can I use a Gtk2::SpinButton to prompt for an integer expressed in hex?
I've tried the following, but it fails.
use strict;
use warnings;
use Glib qw(TRUE FALSE);
use Gtk2 qw(-init);
my($spin)=Gtk2::SpinButton-new_with_range(0,1000,1);
$spin-set_numeric(FALSE);
$spin-signal_connect(output = \outputCB);
my($win)=new Gtk2::Window();
$win-add($spin);
$win-show_all();
Gtk2-main();
sub outputCB
{
my($spin)=@_;
my($value)=$spin-get_adjustment()-get_value();
$spin-set_text(sprint '%X',$value);
}
The text appears to be correct while I hold either arrow button down; I see
hex values incrementing. However, single clicks of an arrow button fail if
the displayed text contains A-F. Hitting the Enter key also fails on the
same values. In both cases, the text changes to a decimal integer.
Thanks.
Jim
Hi Jim
What do the '$value's look like in the outputCB (either in a debugger or ...).
sprint - should be sprintf?
Maybe try set_value or set_digits rather than set_text?
How are any of these impacted by the set_numeric statement?
Bob
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Gtk2::SpinButton For Hex
How can I use a Gtk2::SpinButton to prompt for an integer expressed in hex?
I've tried the following, but it fails.
use strict;
use warnings;
use Glib qw(TRUE FALSE);
use Gtk2 qw(-init);
my($spin)=Gtk2::SpinButton-new_with_range(0,1000,1);
$spin-set_numeric(FALSE);
$spin-signal_connect(output = \outputCB);
my($win)=new Gtk2::Window();
$win-add($spin);
$win-show_all();
Gtk2-main();
sub outputCB
{
my($spin)=@_;
my($value)=$spin-get_adjustment()-get_value();
$spin-set_text(sprint '%X',$value);
}
The text appears to be correct while I hold either arrow button down; I see hex
values incrementing. However, single clicks of an arrow button fail if the
displayed text contains A-F. Hitting the Enter key also fails on the same
values. In both cases, the text changes to a decimal integer.
Thanks.
Jim
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Re: Using a TextView as a sort of Hbox with wrapping
Chris,
If I interpret what you are trying to do correctly (not necessarily a
given), then I would have thought that GtkScrolledWindow (possibly in
conjunction with GtkViewport) would be the tool for the job.
James
On 26 January 2014 14:50, Chris Angelico ros...@gmail.com wrote:
My application has a status bar which can have an arbitrary number of
items added to it. Currently, I use an Hbox with no padding, which
works fine as long as there aren't too many statusbar elements added;
but if there are a lot, the tail starts wagging the dog, in that the
size of the window becomes dictated by the status bar (which normally
is supposed to be subtle, not intrusive/controlling). So I figured
that wrapping elements onto another line of status bar would be a more
useful way to lay them out, but that's really tricky. Enter TextView:
it's a widget designed to handle wrapping, and it can have child
widgets embedded in it.
Here's some proof of concept code. (This is in Pike, so you may not be
able to run it directly.)
int main()
{
GTK2.setup_gtk();
object
buf=GTK2.TextBuffer(),view=GTK2.TextView(buf)-set_editable(0)-set_wrap_mode(GTK2.WRAP_WORD)-set_cursor_visible(0);
view-modify_base(GTK2.STATE_NORMAL,GTK2.GdkColor(240,240,240));
foreach (({Asdf asdf,Qwer qwer,Zxcv zxcv,Testing,
testing,1, 2, 3, 4}),string x)
{
view-add_child_at_anchor(GTK2.Frame()-add(GTK2.Label(x))-set_shadow_type(GTK2.SHADOW_ETCHED_OUT),
buf-create_child_anchor(buf-get_end_iter()));
buf-insert(buf-get_end_iter(), ,-1);
}
GTK2.Window(GTK2.WindowToplevel)-set_default_size(500,300)-add(GTK2.Vbox(0,0)
-add(GTK2.Label(Blah blah blah, this\nhas lots and\nlots of
content\n\nLorem ipsum dolor sit\namet))
-pack_start(GTK2.Button(This sets the base width),0,0,0)
-pack_start(view,0,0,0)
)-show_all()-signal_connect(delete-event,lambda() {exit(0);});
return -1;
}
Two questions.
Firstly: Is this a really REALLY stupid thing to do? When I Googled
for a wrapping layout manager, nothing mentioned this possibility, so
I'm wondering if this is somehow fundamentally bad and I just haven't
seen it.
And secondly: The TextArea defaults to having a white background, but
I want to use the window's default background. On my system, setting
the color to (240,240,240) does that, but that means I'm explicitly
setting a color, so it's going to be grey even if the UI theme
specifies that a window's background should be vibrant orange. Is
there a way to tell the TextView not to draw its background, or
alternatively, a way to query the default background color for a
window?
Thanks in advance!
ChrisA
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GtkWidget focus line color
I am creating a GTK3 theme and want to have all indicator focus lines
a particular color in all states.
At the moment the focus lines uses the color of the widget state it is
on... for example:
.button {
-GtkWidget-focus-padding: 2;
-GtkWidget-focus-line-pattern: \0\0;
padding: 1px;
border-width: 1px;
border-style: solid;
border-color: @theme_base_color;
border-bottom-color: @gradient_from_color;
background-image: -gtk-gradient(linear, left top, left bottom,
from (@gradient_from_color),
to (@gradient_to_color));
color: @theme_fg_color;
}
.button:hover {
border-color: @insensitive_color;
background-image: none;
background-color: @theme_selected_bg_color;
color: @theme_selected_fg_color;
}
When the mouse hovers over a button the focus line color changes from
@theme_fg_color; to @theme_selected_fg_color but I might want it to
stay @theme_fg_color (or perhaps another color set globally).
In GTK2 I achieved this using the pixmap engine and an png image:
image
{
function= FOCUS
recolorable = TRUE
file= Others/focus.png
border = { 1, 1, 1, 1 }
stretch = TRUE
}
I am not using any GTK3 engine and had hoped something like this would
have worked (it doesn't).
*:focus {
color: @theme_fg_color;
}
I am looking for something like an option
-GtkWidget-focus-line-color which doesn't exist or someone who knows
how I might achieve this. I don't mind if I have to use an image and
have actually been trying to use border-images and such but haven't
been successful.
Thanks
James
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Re: Get column no. of edited cell.
Another possibility would be to use g_object_set_data to give the renderer a column number, and g_object_get_data in the handler. On 2 June 2013 07:15, dE de.tec...@gmail.com wrote: On 06/02/13 00:27, Arnel A. Borja wrote: On Sunday, 02 June, 2013 01:44 AM, dE wrote: I've set the editable property of GtkCellRenderer to true, and set the call back for the edited signal. This particular signal tells the node/row in which the edit has occurred, but not the column/filed. How can I get that? Thanks! Use a different renderer for each column. Then check in the edited signal which renderer was edited. I'm trying this out, but isnt this also possible with gtk_tree_view_get_cursor clubbed with gtk_tree_view_column_get_sort_** column_id. Cause I'm getting segfault with -- gtk_tree_view_get_cursor ( detect_object ( DataDisplay, build_object ), tree_path, focus_column ); Where -- GtkTreeViewColumn **focus_column; GtkTreePath **tree_path; __**_ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/**mailman/listinfo/gtk-app-**devel-listhttps://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
In-App Analytics
Does anyone know of a library for in-app analytics for GTK apps? On mobile platforms it's pretty popular to have analytics where, like on the web, anonymous usage stats can be collected. This really helps developers understand how their app is being used, what features are or aren't used, etc. Regards, Cassidy James ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Question about a Gtk-WARNING message when running gedit
Hi gtk-list: I recently built and installed GTK+ version 3.6.4. This ended up 'breaking' my old RHEL system supplied version of gedit (version 2.16.0). So I went ahead and built and installed gedit version 3.2.6. This version works, but I get the following Gtk-WARNING every time I run gedit: (gedit:9928): Gtk-WARNING **: Theme parsing error: data:5:10: Not using units is deprecated. Assuming 'px'. It appears to me that this may be caused by a call to a GTK+ function somewhere in the gedit source code using a deprecated call format. However, I don't know what to look for in the gedit source code. What GTK+ function would such a WARNING be associated with? Or is this caused by some other problem? Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm, http://science.gsfc.nasa.gov/606.3/TILTON/ and https://powellcenter.usgs.gov/globalcroplandwater/. ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
OT: tcl/tk GUI app
All My apologies for being somewhat off topic (OT), but I don't know where else to turn (your pointers in that arena would be appreciated as well). I am trying to learn some GUI programming and what is readily available to me is tck/tk, and I have a (very) little experience with it. I want to open a dialog to choose a directory, and then put that choice into a variable to be used by another action. So far I can only get the dialog set dir [tk_chooseDirectory -initialdir ~ -title Choose a directory] which works fine in and of itself, of course, but I haven't been able to use the result for anything as yet. Any help you may be able to offer would be appreciated. Thank you Regards Fred James ___ gtk-list mailing list gtk-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-list
Re: OT: tcl/tk GUI app
Georgios Petasis wrote:
if {$dir ne } {
# your action here...
}
Georgios Petasis
Thank you ... at least with that, so far I can display the selected
directory in the main window ... that is more than I had.
(for those not interested ... you may easily stop reading here ... thank
you)
What is the action, you ask?
(1) enter a search string (exact match, but not case sensitive)
(2) select a starting directory
(3) search recursively from there
(3.1) search first for a list of files ending in *.odt
(3.2) search each file on the list (found in 3.1) for the string
(3.2.1) make a list of matches
(3.2.2) display the match list in a scroll box
... or some variation of that.
I have odt2txt (downloaded and running), and I have a couple of (BASH)
shell scripts that complete the set. I put all three in /usr/bin. The
set works like this ...
(1) in a terminal window
(1.1) cd to /desired/path
(1.2) enter the following: searchODT string [string [string ...
[string]]]
(1.2.1) that is, at least 1 and up to 9 space separated arguments
(hard coded arbitrary limit)
(1.3) searchODT sorts out the string, combining all arguments into
one string
(1.4) searchODT calls depthODT, which generates the list (file) of
*.odt files
(1.3.1) search is recursive beginning at the 'pwd' where the
original searchODT command was issued
(1.4) searchODT then calls odt2txt for each entry in the list (file)
(1.4.1) the output from odt2txt is grep'd for the string(s) (grep -i)
(1.4.2) matches are put into another file for display
(1.4.2.1) it is possible to use: more, soffice, kwrite (and I am
sure others) for the display.
Other than argument count, there is basically no error checking at the
moment.
(scripts available, if interested)
The original project was to done to help my spouse, because dolphin
(file manager) doesn't seem to be able to search inside OOo documents?
And the current version functions well enough. But I though I might be
able to use this opportunity to learn some more tcl/tk.
Thank you for your help
Regards
Fred James
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g_timeout handling, is this the best way?
I have a program that uses a g_timeout loop to control the display of a sequence of plots (produced via plplot), and I need to be able to change the delay between displaying the plots. The method I am using is this: 1. Use g_timeout_add_full to create the timeout, with the GSourceFunc as a routine that checks whether a termination flag has been set, and either displays the next frame and returns TRUE or just returns FALSE. 2. Set up a GDestroyNotify function that checks if a restart flag is set and if it has then starts a new timeout loop. 3. The callback that changes the speed, updates the delay and then sets both the termination and restart flags, so that on the next timeout call, the loop is destroyed and recreated with the new delay. Is this the best way to do it or is there a more convenient way? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Lack of gtk_application_get_window_by_id function despite of documentation
On 17 November 2012 16:05, Jakub Kucharski dexc...@gmail.com wrote: I was trying to compile my application and it appears that one documented function called 'gtk_application_get_window_**by_id' ( http://developer.gnome.org/**gtk3/stable/GtkApplication.** html#gtk-application-get-**window-by-idhttp://developer.gnome.org/gtk3/stable/GtkApplication.html#gtk-application-get-window-by-id) doesn't exist. I run Debian Sid on my machine and I've installed 'libgtk-3-dev' package, so I don't really see what's wrong. Maybe this output will be useful for you: According to the Debian package list they are still at 3.4 in Sid, and the routine is marked Since 3.6. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Examples of ComboBox using an explicit model?
Thanks to those who send examples on or off list. With the guidance of those I was able to figure out how the different bits fit together and get a working code. James ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Examples of ComboBox using an explicit model?
I am currently trying to implement combobox cell renderers in the high-level gtk-fortran code. Unfortunately unlike normal comboboxes where there is the convenience type of GtkComboBoxText this is not available for cell renderers. I have hunted for examples of a working combobox that uses an explicit tree model without any success. Does anybody on this list have such an example (or even better, of a CellRendererCombo) that they would be willing to share. James ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
g_value_set_instance -- how to use?
There is very little documentation that I can find explaining how
g_value_set_instance is supposed to work. Is the following anywhere near
correct?
void my_gvalue_setter( const GValue *gv,
gpointer val,
Gtype type)
{
g_value_unset(gv);
g_value_init(gv, type);
g_value_set_instance(gv, val);
}
Then provided val is a pointer to a quantity of type type, it's equivalent
to using the specific setting routine or am I barking up quite the wrong
tree?
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Re: Threads and idle functions
(sorry forgot list) On 3 July 2012 01:50, David Buchan pdbuc...@yahoo.com wrote: My understanding is that child threads must never alter the UI in any way. If I have a program which spawns a child thread to download some data and I want to be able to have a dialog pop up should an error occur, is it correct to say that I need an idle function to be running concurrently to monitor some global variable which would contain the status (set by the download thread), and then the idle function would create the dialog pop-up? Put another way, if only the GTK+ main iteration is allowed to alter the GUI, then how does someone get information out of a child thread and to the UI? Well from what I hear, g_idle_add offers some form of thread safety so a child thread can communicate some item of data via a callback executed in the GUI thread. The documentation also seems to support this view: http://developer.gnome.org/glib/2.31/glib-The-Main-Event-Loop.html#glib-The-Main-Event-Loop.description your child/download thread does the monitoring of the error status and when an error is found, use g_idle_add to wait some moments and then communicate the error to a callback. HTH, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Threads and idle functions
On 3 July 2012 02:10, James Morris jwm.art@gmail.com wrote: (sorry forgot list) On 3 July 2012 01:50, David Buchan pdbuc...@yahoo.com wrote: My understanding is that child threads must never alter the UI in any way. If I have a program which spawns a child thread to download some data and I want to be able to have a dialog pop up should an error occur, is it correct to say that I need an idle function to be running concurrently to monitor some global variable which would contain the status (set by the download thread), and then the idle function would create the dialog pop-up? Put another way, if only the GTK+ main iteration is allowed to alter the GUI, then how does someone get information out of a child thread and to the UI? Well from what I hear, g_idle_add offers some form of thread safety so a child thread can communicate some item of data via a callback executed in the GUI thread. The documentation also seems to support this view: http://developer.gnome.org/glib/2.31/glib-The-Main-Event-Loop.html#glib-The-Main-Event-Loop.description Forgive me if I speak as if the thread safety of g_idle_add is something to be doubted. Multi-threaded applications are typically complicated affairs and the ease of use of g_idle_add rather contrasts with my (non-professional) experience. That being said, there are probably limits to what can be accomplished using it but for basic use-cases such as these it is perfect. your child/download thread does the monitoring of the error status and when an error is found, use g_idle_add to wait some moments and then communicate the error to a callback. HTH, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
custom widget theme change problem
Hi, I have a custom GTK widget which renders using Cairo. In the expose callback gtk_widget_get_style is called to obtain colours to render the widget with some theme consistency. When a theme is changed (ie using gtk-chtheme) any of my custom widgets that are visible are not updated. However, after switching to a different notebook tab, I can see previously hidden instances of the custom widget have been updated (switching notebook tabs back again does not trigger update). Can anyone give any pointers as to what might be happening? Thanks, James. GTK 2.24.10 ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: custom widget theme change problem
Hello again, Seems to be a habit of mine here, I ask a question, don't get an immediate response and then look further into it and find some sort of solution... On 21 June 2012 10:42, James Morris jwm.art@gmail.com wrote: Hi, I have a custom GTK widget which renders using Cairo. In the expose callback gtk_widget_get_style is called to obtain colours to render the widget with some theme consistency. When a theme is changed (ie using gtk-chtheme) any of my custom widgets that are visible are not updated. However, after switching to a different notebook tab, I can see previously hidden instances of the custom widget have been updated (switching notebook tabs back again does not trigger update). Can anyone give any pointers as to what might be happening? I've found the culprit, or put another way, I've found what to comment out to fix the problem. In my custom_widget_realize callback it has the following code which if I comment out the last three lines of, the problem resolves: window = gtk_widget_get_parent_window (widget); gtk_widget_set_window(widget, window); g_object_ref (window); style = gtk_widget_get_style(widget); style = gtk_style_attach(style, window); gtk_widget_set_style(widget, style); It is code I updated from this old code (which won't compile with GTK_DISABLE_DEPRECATED etc): widget-window = gtk_widget_get_parent_window (widget); g_object_ref (widget-window); widget-style = gtk_style_attach (widget-style, widget-window); This old code (which uses GDK rather than Cairo) doesn't have any problem with theme changes... but without it the widgets aren't updated after theme changes. Scratching head.. James. Thanks, James. GTK 2.24.10 ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: custom widget theme change problem
On 22 June 2012 01:50, James Morris jwm.art@gmail.com wrote: Can anyone give any pointers as to what might be happening? I've found the culprit, or put another way, I've found what to comment out to fix the problem. In my custom_widget_realize callback it has the following code which if I comment out the last three lines of, the problem resolves: window = gtk_widget_get_parent_window (widget); gtk_widget_set_window(widget, window); g_object_ref (window); style = gtk_widget_get_style(widget); style = gtk_style_attach(style, window); gtk_widget_set_style(widget, style); Ok I discovered that solution to cause an alternative problem: Gtk-CRITICAL **: IA__gtk_style_detach: assertion `style-attach_count 0' failed Which caused me to the first two of the last three lines (ie without gtk_widget_set_style). The docs for gtk_style_attach say: Since this function may return a new object, you have to use it in the following way: style = gtk_style_attach (style, window) So what am I meant to do with it? thanks james. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
GtkFileChooser selection-changed signal emission on gtk_dialog_run()
Hi, I've got a problem with the selection-changed signal being emitted as soon as gtk_dialog_run is called on a GtkFileChooserDialog. I tried delaying connection of the callback until right before calling gtk_dialog_run but there were still four calls (in a row AFAICT) to the callback. I am now using g_timeout_add as a work-around to delay connection of the signal to my callback and thus prevent the four initial selection-changed emissions activating the callback. Is this normal? Is there a more standard way of doing this? I'm using GTK 2.24.10 in 64bit Arch Linux. Thanks, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: GtkFileChooser selection-changed signal emission on gtk_dialog_run()
On 14 June 2012 16:54, James Morris jwm.art@gmail.com wrote: Hi, I've got a problem with the selection-changed signal being emitted as soon as gtk_dialog_run is called on a GtkFileChooserDialog. I tried delaying connection of the callback until right before calling gtk_dialog_run but there were still four calls (in a row AFAICT) to the callback. I am now using g_timeout_add as a work-around to delay connection of the signal to my callback and thus prevent the four initial selection-changed emissions activating the callback. To put this in context, it's for auto-previewing audio files. The simple implementation causes an audio file to be previewed when gtk_dialog_run is called* or when the current folder is changed in the chooser. By using a dont_preview boolean and connecting the current-folder-changed signal to a callback I can then use g_timeout_add to cancel the dont_preview flag. The flag must be set before gtk_dialog_run is called, and will always be set when the folder is changed. *provided the item initially selected in the chooser is an audio file. Is this normal? Is there a more standard way of doing this? I'm guessing it is normal/standard and that work-a-rounds are necessary if you want to do something like this. I'm using GTK 2.24.10 in 64bit Arch Linux. Thanks, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
RE: Re: Can't locate object method add_actions...
I've done lots of XS, and can help if you need it. Here are the resources I used to learn it, the first two being the most helpful. They're listed in order, from gentlest to most blood-curdling. Nah, it's not so bad. http://world.std.com/~swmcd/steven/perl/pm/xs/intro/index.html http://www.amazon.com/Extending-Embedding-Perl-Tim-Jenness/dp/1930110820 http://www.johnkeiser.com/perl-xs-c++.html perlxstut perlxs Good luck. Jim -Original Message- From: gtk-perl-list-boun...@gnome.org [mailto:gtk-perl-list- boun...@gnome.org] On Behalf Of Dave M Sent: Friday, June 08, 2012 10:21 AM To: gtk-perl mailing list Subject: Re: Can't locate object method add_actions... On Fri, Jun 8, 2012 at 10:14 AM, Torsten Schoenfeld kaffeeti...@gmx.de wrote: On 08.06.2012 16:57, Dave M wrote: I'll give it a shot. That's the spirit! :-) Be warned that this will be my first run-in with the demon known as XS, so it might not be pretty. The pygobject override might be a place to start, if Python is more familiar to you: http://git.gnome.org/browse/pygobject/tree/gi/overrides/Gtk.py#n124 But I notice that this implementation is less complete than our old XS implementation: it lacks the translation and accelerator handling. ___ No, definitely more familiar with Perl. I've already started, but it might take me a little time, especially since I'll be at YAPCNA next week. This looks useful for XS: http://search.cpan.org/dist/perl/pod/perlguts.pod Thanks, Dave M ___ gtk-perl-list mailing list gtk-perl-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-perl-list ___ gtk-perl-list mailing list gtk-perl-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-perl-list
Re: How do I fix the window size?
On 5 June 2012 11:00, Ferdinand Ramirez ramirez.ferdin...@yahoo.com wrote: I have a treeview and a scrollbar which are both within a hbox. The hbox is within a window. When I expand the treeview, the window resizes itself to include the whole treeview. The biggest problem is when the treeview has more elements than what can be seen on a single screen. The window size becomes larger than the display. I want the window size to remain the same and use my scrollbar to navigate my treeview. How do I achieve this? gtk_window_resize does not seem to be the solution. I think the solution is to place the treeview in a gtk_scrolled_window rather than using an hbox and an explicit scrollbar. You may also need to make a call to gtk_widget_set_size_request on the scrolled window to get what you want. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: How do I fix the window size?
On 5 June 2012 12:50, Ferdinand Ramirez ramirez.ferdin...@yahoo.com wrote: --- On Tue, 6/5/12, James Tappin jtap...@gmail.com wrote: I think the solution is to place the treeview in a gtk_scrolled_window rather than using an hbox and an explicit scrollbar. The reason for trying out with an explicit hbox is that the column headers scroll out of view with a gtk_scrolled_window. I'm puzzled as it doesn't do that in my RPN calculator stack and registers display. This uses a list model (i.e. no sub-rows). Here are the key bits of code (in Fortran 2003 -- I'm not a C programmer). The list creator function: function hl_gtk_listn_new(scroll, ncols, types, changed, data, multiple, width, titles, height, swidth, align, ixpad, iypad, sensitive, tooltip, sortable, editable, colnos, edited, data_edited) result(list) type(c_ptr) :: list type(c_ptr), intent(out) :: scroll integer(kind=c_int), intent(in), optional :: ncols integer(kind=type_kind), dimension(:), intent(in), optional :: types . . . ! Create the storage model model = gtk_list_store_newv(ncols_all, c_loc(types_all)) ! Create the list in the scroll box scroll = gtk_scrolled_window_new(C_NULL_PTR, C_NULL_PTR) call gtk_scrolled_window_set_policy(scroll, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC) list = gtk_tree_view_new_with_model(model) call gtk_container_add(scroll, list) . . . And in the calculator itself: ! Registers. jbase = hl_gtk_box_new() idx = hl_gtk_notebook_add_page(mstabs, jbase, label=Registers//c_null_char) fmemory = hl_gtk_listn_new(smemory, changed=c_funloc(memsel), height=300, titles= (/ Index//c_null_char, Value//c_null_char /), types = (/ g_type_int, g_type_double /)) call hl_gtk_listn_set_cell_data_func(fmemory, memcol, func=c_funloc(show_list), data=c_loc(memcol)) call hl_gtk_box_pack(jbase, smemory) I hope that this will at least give some clues as to how the bits fit together. P.S. hl_gtk_* routines are Fortran routines that bundle settings together and use Fortran's optional argument system to hide much of the complexity of the raw gtk_* calls. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Multiple selections in list/treeview widgets and accelerator groups?
Is it possible that having an accelerator group associated with the top-level window of a hierarchy could prevent multiple selections in a list widget within that window from working? I have an application that is supposed to have multiple selections enabled (gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE) has been called on the selection object associated with the treeview). But when I do a control-click or shift-click on the list nothing happens [I don't expect Ctrl-A to work as that is bound to a button]. The only significant difference I can see from a demo program that does work is that the top-level window has an accelerator group in the application and not in the demo. James ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk-app to search google scholar
On 22 May 2012 21:20, Rudra Banerjee bnrj.ru...@yahoo.com wrote: Dear friends, I am trying to make a gtk application that will create a bibtex. The problem is I am a novice in C/gtk programming(this will be only my 2nd programme in gtk). To do that, First and foremost, I need to search google scholar from the code. I tried using lynx and failed. Can anyone kindly show me a simple code in C that can fetch data from google scholar with Import into bibtex entry on? According to http://en.wikipedia.org/wiki/Google_Scholar#Features_and_specifications As of March 2012, Google Scholar is not yet available to the Google AJAX API. So I would guess there will not be any simple C code to achieve what you want. James. Best and Regards, -- Rudra Banerjee If possible, plz. don't send me MsWord/PowerPoint mails. Why? See http://www.gnu.org/philosophy/no-word-attachments.html ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: GtkTable cells resizing
On 15/05/12 14:45, Tristan Van Berkom wrote: On Mon, May 14, 2012 at 10:29 PM, James Steward jamesstew...@optusnet.com.au wrote: On 15/05/12 11:56, Tristan Van Berkom wrote: ... perhaps it's worth trying an extra call to gtk_widget_queue_resize() after modifying your table. I'm trying that. I have signals connected thus; g_signal_connect(G_OBJECT(p-canvas), expose-event, G_CALLBACK(plot_expose_event), p); g_signal_connect(G_OBJECT(p-canvas), select-item, G_CALLBACK(plot_select_event), p); and get the plot_select_event() routine to calculate and set new canvas sizes with gtk_plot_canvas_set_size(GTK_PLOT_CANVAS(p-canvas), width, height); then call gtk_widget_queue_resize(GTK_WIDGET(p-table)); This causes plot_expose_event() to get called, which calls gtk_plot_canvas_paint(GTK_PLOT_CANVAS(canvas)); But the table rows seem to expand to the largest canvas and don't seem to take on variable heights. Feel I've been around and around the mulberry bush on this ;-) Hard to say whats going on here, I wonder who is responding to the size requests for these items which are getting drawn. It seems you connect to a signal to draw on a widget, which means the content is not the widget, so probably you need to also connect a signal to override the size request of the said widget you intend painting onto ? Perhaps you are using forced size requests to accomplish this (using gtk_widget_set_size_request() or such), and have somehow mixed up the size requests while swapping your content onto new rows/columns ? Other than that, child 'expand' properties will be considered by the GtkTable (if all children can expand, then it's quite possible that after reaching a large window size the content will be evenly spread). Thanks for your ideas. I had another. I could define the table as having twice as many rows, then (hopefully) just reassigning the attach points. I.e. where I now have; gtk_table_attach_defaults(table1, canvas1, 0, 1, 0, 1); gtk_table_attach_defaults(table1, canvas2, 0, 1, 1, 2); gtk_table_attach_defaults(table1, canvas3, 0, 1, 2, 3); instead I'll define a 6 row table and initialise as; gtk_table_attach_defaults(table1, canvas1, 0, 1, 0, 2); gtk_table_attach_defaults(table1, canvas2, 0, 1, 2, 4); gtk_table_attach_defaults(table1, canvas3, 0, 1, 4, 6); Then to zoom canvas2, I can hopefully somehow move the attachment points to; gtk_table_attach_defaults(table1, canvas1, 0, 1, 0, 1); gtk_table_attach_defaults(table1, canvas2, 0, 1, 1, 5); gtk_table_attach_defaults(table1, canvas3, 0, 1, 5, 6); I'd obviously need to fix the row size by making the table homogeneous. What do you think? Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
RE: probable gtk_window_present and pango help
Also consider hiding your window (with a call to window-hide()) instead of
destroying it, and making it reappear with a call to window-show().
Jim Tilton
-Original Message-
From: gtk-app-devel-list-boun...@gnome.org
[mailto:gtk-app-devel-list-boun...@gnome.org] On Behalf Of David Necas
Sent: Friday, May 18, 2012 2:19 PM
To: Rudra Banerjee
Cc: gtk-app-devel-list
Subject: Re: probable gtk_window_present and pango help
On Fri, May 18, 2012 at 09:12:45PM +0530, Rudra Banerjee wrote:
Here is a minimal example of a program, where if i click the button, a
pop up window appears. I am posting both the call back function and
the main routine (table.c).
I am facing 2 problem.
Unfortunately, you are facing much more problems.
For start
gtk_container_add(GTK_CONTAINER(window1), vbox1);
is called with an unitialised variable window1 (i.e. no window1 is ever
created). This leads to a CRITICAL message to console and/or crash.
And if window1 existed then vbox1 would be packed into two different containers
(window1 and window) which is not possible. So I'm ignoring that part
altogether.
The callback should look like
void
callback_it(GtkWidget *button, gpointer user_data) {
...
}
where in user_data the callback receives the last argument you passed to
g_signal_connect(). It is rarely useful to pass a constant such as Call
there.
The callback is *not* another main() function; it should *not* call
gtk_init() again, etc. Please read the signals section in the Gtk+ tutorial
http://developer.gnome.org/gtk-tutorial/2.90/x159.html
There are several other highly suspicious things:
- redeclaration of global variables (such as window) inside a function;
are you aware this creates a new local variable window that has nothing
to do with the global one?
- inclusion of .c files instead of separate compilation + linking them
together
- calling gtk_widget_show() on individual widgets and then again showing
everything using gtk_widget_show_all()
- not terminating the Gtk+ main loop when the main window is destroyed;
this is usually the first thing to set up in a Gtk+ program, see
http://developer.gnome.org/gtk-tutorial/2.90/c39.html#SEC-HELLOWORLD
etc.
1) The problem is evry time I click the button main, a new window
appears(obviously). What I want to achive is, if the window is already
present, it should not open again; rather it should focus that window.
I believe, this can be achived by gtk_window_present(may be I am wrong).
But I don't know how to use it.
You use it just by calling gtk_window_present() on the window object.
To that meaningfully you need not only to keep the window object around but
also get notified when the window is destroyed. Either by connecting to the
destroy signal or, if you just want to set a pointer to NULL once it is gone,
by using g_object_add_weak_pointer().
2) In the callback function, I have C_1 and C_2. What I want to achive
is Csub1/sub etc via pango(or any other).
For simple things you can sometimes just use UTF-8. But generally, you need to
use Pango markup. If the widget does not have function to set the markup it
has a function to obtain the label widget so that you can use
gtk_label_set_markup() on that.
See the attached code with main problems fixed (and merged to one file).
Please go through the Gtk+ tutorial farther that you perhaps have done.
Yeti
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Unable To Control Focus In A Gtk2::Notebook
I wrote a small example of my problem below. It's just a simple window with a
Gtk2::Notebook that contains a few pages, each with its own Gtk2::Entry. When
I change pages by clicking the tabs, the focus moves to the label on the new
tab, but only if it was originally on the label of the previous tab. This is
exactly what I want in all cases.
However, if the focus was originally somewhere inside the previous page, like
one of the Gtk2::Entry widgets in the example below, the focus moves to a
widget inside the new page. Instead, I'd like the focus to always move to the
label of the new tab.
I've tried attaching callbacks to different signals so I can call
$w-grab_focus() on the label or notebook, but nothing seems to keep the focus
on the new tab's label after page turns. How can I make that happen?
Thanks,
Jim
#!/usr/bin/perl
use strict;
use warnings;
use Gtk2 -init;
my($win)=create();
Gtk2-main();
sub create
{
my($win,$book);
$win=new Gtk2::Window();
$win-signal_connect(delete_event = sub {Gtk2-main_quit()});
$win-add($book=new Gtk2::Notebook());
$book-append_page(new Gtk2::Entry(),new Gtk2::Label($_))
foreach qw(Goo Moo Foo);
$win-show_all();
return $win;
}
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GtkTable cells resizing
Hi, I have an application with a tabbed view. On two tabs I have a table, one is a 2x2 table, the other a 3x1 table (3 rows). In each cell is a canvas that has a gtk plot. I want to be able to click one of the plots in the 3x1 table and change the canvas size to 2/3 the original, with the other two canvases being 1/6 the original size. After redrawing and resizing and mucking about, I can't get the table rows to be different sizes, accommodating the different sized canvases properly, even though I have gtk_table_set_homogeneous (table, FALSE); Any clues how to do this? Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: GtkTable cells resizing
On 15/05/12 11:56, Tristan Van Berkom wrote: Are you using GTK+ 3 ? Still on GTK+ 2.0. If so, use GtkGrid instead... possibly just that will fix things for you. Short of that, if I understand correctly, you have a target state/configuration of a GtkTable (or GtkGrid), if you construct the table in the target configuration from scratch, I take it things work as you want... but dont work properly after performing some kind of a transformation to reach your target state... That's about it. ... perhaps it's worth trying an extra call to gtk_widget_queue_resize() after modifying your table. I'm trying that. I have signals connected thus; g_signal_connect(G_OBJECT(p-canvas), expose-event, G_CALLBACK(plot_expose_event), p); g_signal_connect(G_OBJECT(p-canvas), select-item, G_CALLBACK(plot_select_event), p); and get the plot_select_event() routine to calculate and set new canvas sizes with gtk_plot_canvas_set_size(GTK_PLOT_CANVAS(p-canvas), width, height); then call gtk_widget_queue_resize(GTK_WIDGET(p-table)); This causes plot_expose_event() to get called, which calls gtk_plot_canvas_paint(GTK_PLOT_CANVAS(canvas)); But the table rows seem to expand to the largest canvas and don't seem to take on variable heights. Feel I've been around and around the mulberry bush on this ;-) Regards, James. On Mon, May 14, 2012 at 9:21 PM, James Steward jamesstew...@optusnet.com.au wrote: Hi, I have an application with a tabbed view. On two tabs I have a table, one is a 2x2 table, the other a 3x1 table (3 rows). In each cell is a canvas that has a gtk plot. I want to be able to click one of the plots in the 3x1 table and change the canvas size to 2/3 the original, with the other two canvases being 1/6 the original size. After redrawing and resizing and mucking about, I can't get the table rows to be different sizes, accommodating the different sized canvases properly, even though I have gtk_table_set_homogeneous (table, FALSE); Any clues how to do this? Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Trouble with button mask
Hi, I've been trying to get a canvas select item event to fire for a gtk_plot_canvas. Upon left clicking inside a plot canvas, I can see that gtk_plot_canvas_button_press(...) gets called, and the following lines near the beginning of that function (in the gtkextra lib) cause the function to exit without anything being selected. gdk_window_get_pointer(widget-window, NULL, NULL, mods); if(!(mods GDK_BUTTON1_MASK)) return FALSE; Upon inspection of the variable mods, it appears to have a value of GDK_MOD2_MASK, according to GDB. Anyone know why a GDK_BUTTON1_MASK isn't read when I left click? Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Trouble with button mask
Stupid question below. Please ignore. James. On 14/05/12 15:47, James Steward wrote: Hi, I've been trying to get a canvas select item event to fire for a gtk_plot_canvas. Upon left clicking inside a plot canvas, I can see that gtk_plot_canvas_button_press(...) gets called, and the following lines near the beginning of that function (in the gtkextra lib) cause the function to exit without anything being selected. gdk_window_get_pointer(widget-window, NULL, NULL, mods); if(!(mods GDK_BUTTON1_MASK)) return FALSE; Upon inspection of the variable mods, it appears to have a value of GDK_MOD2_MASK, according to GDB. Anyone know why a GDK_BUTTON1_MASK isn't read when I left click? Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
RE: Unable To Keep Showing Last Item In Gtk2::TreeView
Williams, James P2 james.p2.willi...@lmco.com wrote:
How can I keep my automatic scrolling, even after these kinds of events?
I’ve tried reacting to various signals, but the tree view seems too stale
for $tree-get_visible_range() or $tree-scroll_to_cell() to work.
You might react to size-allocate events, but a slightly different approach
is necessary. Here's a hack around your test code:
Your suggestion was enough to get something running. I had to keep track of
how many items were added, and had to watch for scroll bar changes. As far as
I can tell, the scroll bar stays at the bottom now unless I move it, even if I
resize the window to be shorter. My modified version follows, for reference.
Thanks,
Jim
#!/usr/bin/perl
use strict;
use warnings;
use Glib qw(TRUE FALSE);
use Gtk2 -init;
my($numAdded)=0;
my($win,$tree)=createWin();
Glib::Timeout-add(1000,sub {tickCB($tree)});
$win-show_all();
Gtk2-main();
#
# Creates the widgets in the application. Returns the main
# window and tree view.
#
sub createWin
{
my($win,$scroll,$tree,$model,$mustScroll);
$win=new Gtk2::Window();
$win-set_default_size(250,300);
$win-signal_connect(destroy = \Gtk2::main_quit);
$win-add($scroll=new Gtk2::ScrolledWindow());
$scroll-add($tree=new Gtk2::TreeView());
$tree-set_rules_hint(TRUE);
$tree-insert_column_with_attributes(-1,'Goo',
new Gtk2::CellRendererText(),text = 0);
$tree-set_model($model=
new Gtk2::ListStore('Glib::String'));
$tree-signal_connect(
size_allocate = sub {sizeCB(\$mustScroll,@_)});
$model-signal_connect(
row_inserted = sub {rowCB(\$mustScroll,$tree,@_)});
$scroll-get_vadjustment()-signal_connect(
value_changed = sub {$numAdded=0});
addWords($model,100);
showLast($tree,\$mustScroll);
return ($win,$tree);
}
#
# Called at regular intervals to add more random words to
# the bottom of the tree view. If the previous word was
# visible beforehand, scrolls the tree view so the new
# words are visible.
#
sub tickCB
{
my($tree)=@_;
addWords($tree-get_model(),100);
return TRUE;
}
#
# Adds random words to the bottom of the tree view.
#
sub addWords
{
my($model,$numAdd)=@_;
my(@cons)=grep !/[aeiou]/,'a' .. 'z';
for (1 .. $numAdd) {
$model-set($model-append(),0,
$cons[rand @cons] . 'oo');
$numAdded++;
}
}
#
# Scrolls the tree view so the last row is visible.
#
sub showLast
{
my($tree,$mustScroll)=@_;
my($numRows)=$tree-get_model()-iter_n_children(undef);
$tree-scroll_to_cell(
new Gtk2::TreePath($numRows-1),undef,TRUE,0.0,1.0);
$$mustScroll=TRUE;
$numAdded=0;
}
#
# Called each time the tree view is resized. This is where
# we correct the scroll bar, moving it to the bottom if
# appropriate.
#
sub sizeCB
{
my($mustScroll,$tree,$rect)=@_;
showLast($tree,$mustScroll) if $$mustScroll;
}
#
# Called each time a row is added to the model.
#
sub rowCB
{
my($mustScroll,$tree,$model,$path,$it)=@_;
my($numRows)=$model-iter_n_children(undef);
my($lastVis);
if ($tree-realized()) {
$lastVis=($tree-get_visible_range())[1];
$$mustScroll=$lastVis
$lastVis-get_indices() == $numRows-2-$numAdded;
} else {
$$mustScroll=TRUE;
}
}
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Re: Getting the busy cursor to display.
On 11 April 2012 04:36, jcup...@gmail.com wrote: On 10 April 2012 18:33, James Tappin jtap...@gmail.com wrote: Thanks for the suggestion. Unfortunately in this case it doesn't help. (I have also tried gdk_display_flush and gdk_window_flush, but still the same story). Here's a tiny test program that works for me with gtk2. It just uses: gdk_window_set_cursor( win-window, busy_cursor ); gdk_flush(); J That program works, as does a translation into Fortran. But I'm still not having any joy with my display monitor. Maybe the only convenient fix is to show a window with a message Reading database during the read and then create the monitor afterwards. To Igor: I thought that a progress bar in activity mode had to be prodded to show the animation, which is not possible while I'm doing the read. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Getting the busy cursor to display.
On 11 April 2012 09:25, James Tappin jtap...@gmail.com wrote: On 11 April 2012 04:36, jcup...@gmail.com wrote: On 10 April 2012 18:33, James Tappin jtap...@gmail.com wrote: Thanks for the suggestion. Unfortunately in this case it doesn't help. (I have also tried gdk_display_flush and gdk_window_flush, but still the same story). Here's a tiny test program that works for me with gtk2. It just uses: gdk_window_set_cursor( win-window, busy_cursor ); gdk_flush(); J That program works, as does a translation into Fortran. But I'm still not having any joy with my display monitor. Maybe the only convenient fix is to show a window with a message Reading database during the read and then create the monitor afterwards. To Igor: I thought that a progress bar in activity mode had to be prodded to show the animation, which is not possible while I'm doing the read. I'm now really confused -- I've reordered some of the code so that the set_cursor call precedes putting a message in the status bar. And the status bar updates but not the cursor. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Getting the busy cursor to display.
On 11 April 2012 10:51, James Tappin jtap...@gmail.com wrote: I'm now really confused -- I've reordered some of the code so that the set_cursor call precedes putting a message in the status bar. And the status bar updates but not the cursor. OK: I think I've figured it. The problem is/was that since the pointer was not normally inside the monitor window when the cursor change was made AND there was no event polling during the read, the cursor was stuck in what ever state it entered the window. Since other parts of the program use openmp for parallel DO loops, I've put a parallel section so that one thread polls events while the other does the reads. Thanks for all the comments, they did help getting me thinking down the right lines. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
RE: Making a cursor (cross hair) track between image displays
Hi again, I've made a lot of progress on this task - but I still am having trouble with manipulating the appearance of the Cursor. Apparently the approach for doing this has changed between gtkmm 2 and 3, and apparently all the solutions I can find via Google are for gtkmm 2. How can I change the default appearance of my cursor from the default cursor to something else (e.g. a CrossHair) in gtkmm 3? Thanks. Jim Tilton -Original Message- From: gtk-app-devel-list-boun...@gnome.org [mailto:gtk-app-devel-list-boun...@gnome.org] On Behalf Of Tilton, James C. (GSFC-6063) Sent: Monday, April 02, 2012 12:00 PM To: gtk-app-devel-list@gnome.org Subject: Making a cursor (cross hair) track between image displays Hi GTK+ application developers! I have developed an application using gtkmm in which I display related images in multiple Gtk::Window's. I have two types of display images. One is based on Gtk::Image and the other is based on Gtk::DrawingArea. For the Gtk::Image case I add the Gtk::Image to a Gtk::EventBox, which in turn I add to a Gtk::ScrolledWindow. For the Gtk::DrawingArea, is directly add the Gtk::DrawingArea to a Gtk::ScrolledWindow (without the intervening Gtk::EventBox). When the image sizes exceed the ScrolledWindow display area, I use the Gtk::Adjustment associated with each Gtk::ScrolledWindow to have the pan-scrolling of each window track each other. When I place the cursor in one of the display images, I would like to have a cross hair appear at the cursor location of the window in which the cursor is placed at the location currently pointed to by the cursor. I would ALSO like to have a similar cross hair appear in each of the other associated display images. How can I make this happen with GTK+/gtkmm? I've looked for examples of this and haven't found any. Can anyone point me in the right direction for implementing this feature in my application? (In my current application, the normal arrow cursor appears in just one window, and if I hold the either the left or right mouse button down, I have the column and row location and image data value(s) appear in text below the Scrolled Window image display.) Thanks. Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Getting the busy cursor to display.
I have a gtk (fortran) application that displays a progress monitor while computing, and I would like to display the busy cursor while the program is reading a large data file. Right now what I have is: To define the busy cursor and GDK window (module [global] variables). draw_window = gtk_widget_get_window(window) busy_cursor = gdk_cursor_new_for_display(gdk_display_get_default(), GDK_WATCH) and then to activate/deactivate it: ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ! Set a busy cursor on the progress monitor (for reading the database) subroutine set_monitor_busy(is_busy) logical, intent(in) :: is_busy if (is_busy) then call gdk_display_sync(gdk_display_get_default()) call gdk_window_set_cursor(draw_window, busy_cursor) call gdk_display_sync(gdk_display_get_default()) else call gdk_display_sync(gdk_display_get_default()) call gdk_window_set_cursor(draw_window, NULL) call gdk_display_sync(gdk_display_get_default()) end if end subroutine set_monitor_busy The just before I start to read the big file I have: call set_monitor_busy(.TRUE.) and after reading: call set_monitor_busy(.FALSE.) However, even with both gdk_display_sync calls as shown, sometimes the busy cursor appears and sometimes it doesn't (in fact sometimes the whole window shows blank until after the file read). The commonest case is that the monitor window renders but still keeps the regular cursor. Is there some other call (or calls) I should be making to force the updates to take place? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Getting the busy cursor to display.
On 10 April 2012 10:09, jcup...@gmail.com wrote: On 10 April 2012 16:58, James Tappin jtap...@gmail.com wrote: call gdk_display_sync(gdk_display_get_default()) call gdk_window_set_cursor(draw_window, busy_cursor) call gdk_display_sync(gdk_display_get_default()) My gtk2 program does this with: gdk_window_set_cursor( window, cursor ); gdk_flush(); If that's any help :( I've not tried gtk3 yet. J Thanks for the suggestion. Unfortunately in this case it doesn't help. (I have also tried gdk_display_flush and gdk_window_flush, but still the same story). ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
RE: Making a cursor (cross hair) track between image displays
Hi GTK+ application developers: As it often happens, the inquirer often answers his own question. I finally found clear enough example of something similar in gtkmm 3 and through a little trial and error found the solution. Here it is for gtkmm 3: Glib::RefPtr Gdk::Window ref_Gdk_window = get_window(); Glib::RefPtrGdk::Cursor display_cursor = Gdk::Cursor::create(ref_Gdk_window-get_display(), Gdk::CROSSHAIR); ref_Gdk_window-set_cursor(display_cursor); Now, to complete my application, I just need to draw a cursor clone (crosshair) at the corresponding location in the associated gtkmm windows. Jim Tilton -Original Message- From: gtk-app-devel-list-boun...@gnome.org [mailto:gtk-app-devel-list-boun...@gnome.org] On Behalf Of Tilton, James C. (GSFC-6063) Sent: Tuesday, April 10, 2012 9:28 AM To: gtk-app-devel-list@gnome.org Subject: RE: Making a cursor (cross hair) track between image displays Hi again, I've made a lot of progress on this task - but I still am having trouble with manipulating the appearance of the Cursor. Apparently the approach for doing this has changed between gtkmm 2 and 3, and apparently all the solutions I can find via Google are for gtkmm 2. How can I change the default appearance of my cursor from the default cursor to something else (e.g. a CrossHair) in gtkmm 3? Thanks. Jim Tilton -Original Message- From: gtk-app-devel-list-boun...@gnome.org [mailto:gtk-app-devel-list-boun...@gnome.org] On Behalf Of Tilton, James C. (GSFC-6063) Sent: Monday, April 02, 2012 12:00 PM To: gtk-app-devel-list@gnome.org Subject: Making a cursor (cross hair) track between image displays Hi GTK+ application developers! I have developed an application using gtkmm in which I display related images in multiple Gtk::Window's. I have two types of display images. One is based on Gtk::Image and the other is based on Gtk::DrawingArea. For the Gtk::Image case I add the Gtk::Image to a Gtk::EventBox, which in turn I add to a Gtk::ScrolledWindow. For the Gtk::DrawingArea, is directly add the Gtk::DrawingArea to a Gtk::ScrolledWindow (without the intervening Gtk::EventBox). When the image sizes exceed the ScrolledWindow display area, I use the Gtk::Adjustment associated with each Gtk::ScrolledWindow to have the pan-scrolling of each window track each other. When I place the cursor in one of the display images, I would like to have a cross hair appear at the cursor location of the window in which the cursor is placed at the location currently pointed to by the cursor. I would ALSO like to have a similar cross hair appear in each of the other associated display images. How can I make this happen with GTK+/gtkmm? I've looked for examples of this and haven't found any. Can anyone point me in the right direction for implementing this feature in my application? (In my current application, the normal arrow cursor appears in just one window, and if I hold the either the left or right mouse button down, I have the column and row location and image data value(s) appear in text below the Scrolled Window image display.) Thanks. Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Getting the busy cursor to display.
On 10 April 2012 11:36, Michael Cronenworth m...@cchtml.com wrote: James Tappin wrote: Is there some other call (or calls) I should be making to force the updates to take place? I use the following for widget updates during background processing: while ( gtk_events_pending( ) ) gtk_main_iteration( ); Not sure if it will work for cursor drawing though. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list I have tried that as well -- and still no joy. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Unable To Keep Showing Last Item In Gtk2::TreeView
The code below illustrates a problem I'm having with
Gtk2::TreeViewhttp://gtk2-perl.sourceforge.net/doc/pod/Gtk2/TreeView.html (or
herehttp://developer.gnome.org/gtk/2.24/GtkTreeView.html). It just displays a
list of random words, and adds a new one at the bottom once every second. I'd
like to automatically scroll the new word into view, but only if the one just
before it was visible. That way, this automatic scrolling won't annoy someone
looking elsewhere in the tree view.
Everything words fine until something causes the tree view to shrink. Making
the window smaller is an example. The actual application I'm working on has
other examples, e.g., a
Gtk2::Expanderhttp://gtk2-perl.sourceforge.net/doc/pod/Gtk2/Expander.html (or
herehttp://developer.gnome.org/gtk/2.24/GtkExpander.html). If you resize the
window to be smaller, you should see the problem. The gravity of the scroll
bar, or whatever, moves it slightly off the bottom of the view after the
shrink, turning off the automatic scrolling.
How can I keep my automatic scrolling, even after these kinds of events? I've
tried reacting to various signals, but the tree view seems too stale for
$tree-get_visible_range() or $tree-scroll_to_cell() to work.
Thanks,
Jim
#!/usr/bin/perl
use strict;
use warnings;
use Glib qw(TRUE FALSE);
use Gtk2 -init;
my($win,$tree)=createWin();
Glib::Timeout-add(1000,sub {tickCB($tree)});
$win-show_all();
Gtk2-main();
#
# Creates the widgets in the application. Returns the main
# window and tree view.
#
sub createWin
{
my($win,$scroll,$tree,$model);
$win=new Gtk2::Window();
$win-set_default_size(250,300);
$win-signal_connect(destroy = \Gtk2::main_quit);
$win-add($scroll=new Gtk2::ScrolledWindow());
$scroll-add($tree=new Gtk2::TreeView());
$tree-set_rules_hint(TRUE);
$tree-insert_column_with_attributes(-1,'Goo',
new Gtk2::CellRendererText(),text = 0);
$tree-set_model($model=
new Gtk2::ListStore('Glib::String'));
addWord($model) for 0 .. 100;
showLast($tree);
return ($win,$tree);
}
#
# Called at regular intervals to add another random word
# to the bottom of the tree view. If the previous word was
# visible beforehand, scrolls the tree view so the new word
# is visible.
#
sub tickCB
{
my($tree)=@_;
my($model)=$tree-get_model();
my($numRows)=$model-iter_n_children(undef);
my($lastVis)=($tree-get_visible_range())[1];
my($mustScroll)=$lastVis
$lastVis-get_indices() == $numRows-1;
addWord($model);
showLast($tree) if $mustScroll;
return TRUE;
}
#
# Adds a random word to the bottom of the tree view.
#
sub addWord
{
my($model)=@_;
my(@cons)=grep !/[aeiou]/,'a' .. 'z';
$model-set($model-append(),0,
$cons[rand @cons] . 'oo');
}
#
# Scrolls the tree view so the last row is visible.
#
sub showLast
{
my($tree)=@_;
my($numRows)=$tree-get_model()-iter_n_children(undef);
$tree-scroll_to_cell(
new Gtk2::TreePath($numRows-1),undef,TRUE,0.0,1.0);
}
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RE: Making a cursor (cross hair) track between image displays
Thanks John, Your response is very helpful. The one key question that remains for me is: How do I draw a floating crosshair? Thanks. Jim Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ -Original Message- From: jcup...@gmail.com [mailto:jcup...@gmail.com] Sent: Wednesday, April 04, 2012 4:00 AM To: Tilton, James C. (GSFC-6063) Cc: gtk-app-devel-list@gnome.org Subject: Re: Making a cursor (cross hair) track between image displays Hi Jim, On 2 April 2012 17:00, Tilton, James C. (GSFC-6063) james.c.til...@nasa.gov wrote: When I place the cursor in one of the display images, I would like to have a cross hair appear at the cursor location of the window in which the cursor is placed at the location currently pointed to by the cursor. I would ALSO like to have a similar cross hair appear in each of the other associated display images. Add an event handler to the eventbox and listen for GDK_MOTION_NOTIFY. You need to use gtk_widget_add_events() and turn on motion events with GDK_POINTER_MOTION_MASK, gtk will not deliver motion events to windows by default to try to cut down on unnecessary signalling. (gtk used to support motion event compression, where it would just report the most recent position rather than all positions since the last event delivery, but I think this has been deprecated ... perhaps an expert knows) Once you have a motion events, use motion.x and motion.y to get the mouse position, map this to image space, then map out to the coordinate space for your other image windows. On those other displays, draw a floating crosshair at the right spot. My program does something like this, you're welcome to look at the source if it might help. Though it's a large, hairy thing and perhaps not a clear example. http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS John ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Making a cursor (cross hair) track between image displays
Hi GTK+ application developers! I have developed an application using gtkmm in which I display related images in multiple Gtk::Window's. I have two types of display images. One is based on Gtk::Image and the other is based on Gtk::DrawingArea. For the Gtk::Image case I add the Gtk::Image to a Gtk::EventBox, which in turn I add to a Gtk::ScrolledWindow. For the Gtk::DrawingArea, is directly add the Gtk::DrawingArea to a Gtk::ScrolledWindow (without the intervening Gtk::EventBox). When the image sizes exceed the ScrolledWindow display area, I use the Gtk::Adjustment associated with each Gtk::ScrolledWindow to have the pan-scrolling of each window track each other. When I place the cursor in one of the display images, I would like to have a cross hair appear at the cursor location of the window in which the cursor is placed at the location currently pointed to by the cursor. I would ALSO like to have a similar cross hair appear in each of the other associated display images. How can I make this happen with GTK+/gtkmm? I've looked for examples of this and haven't found any. Can anyone point me in the right direction for implementing this feature in my application? (In my current application, the normal arrow cursor appears in just one window, and if I hold the either the left or right mouse button down, I have the column and row location and image data value(s) appear in text below the Scrolled Window image display.) Thanks. Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Trouble with TreeView
Hi All,
I've built a TreeModel by creating a new TreeStore, and populating it with;
for (rp = parent; rp; rp = rp-next) {
gtk_tree_store_append(store, iter, NULL);
gtk_tree_store_set(store, iter,
0, rp-number, -1);
for (ep = rp-child; ep; ep = ep-next) {
gtk_tree_store_append(store, child, iter);
gtk_tree_store_set(store, child,
0, ep-number,
1, ep-name,
2, ep-mean,
3, ep-std_dev,
-1);
}
}
Then created a new view, associated the model with it, and inserted columns.
I add the view to a scrolled window, which is in turn added to a dialog
content area.
When I display the dialog, the tree is not quite what I expect.
In the first row (0), the values for name, mean and std_dev have not
been defined, yet the mean and std_dev (which are floats) are shown as
0.00. I don't want them to be displayed at all.
So to clarify, the first part of the tree looks like
1 | | 0.00 | 0.00
5 | Fu Bar | 0.345123 | 0.051234
3 | Snafu | 0.765432 | 0.145678
Is there a way to suppress the display of some columns that don't make
sense for the parent node, I.e. columns 1, 2, 3 in row 0?
Regards,
James.
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An issue with Qt styling and/or threads?
I have a problem running a Gtk program when using the Qt style as supplied via gtk-qt-engine and kde-config-gtk-style. The program is a fairly heavy duty computation that uses openmp for parallel computation and has a gtk progress monitor (which is updated from within a critical section so it can never be accessed by more than one thread at a time). When the Qt style is selected, the progress bars (gtk_progress_bar) are corrupted and the errors below are displayed repeatedly: (th_run:2015): Gdk-CRITICAL **: gdk_pixmap_foreign_new_for_display: assertion `(anid != 0)' failed (th_run:2015): Gdk-CRITICAL **: gdk_draw_drawable: assertion `GDK_IS_DRAWABLE (src)' failed (th_run:2015): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed QPixmap: It is not safe to use pixmaps outside the GUI thread QPixmap: It is not safe to use pixmaps outside the GUI thread QPainter::begin: Paint device returned engine == 0, type: 2 QPixmap: It is not safe to use pixmaps outside the GUI thread QPainter::end: Painter not active, aborted The problem does not occur with other Gtk style settings (e.g. Nuvola). I'm not sure if the problem is with the Qt wrapper, Gtk+ or my code. FWIW I'm running Debian stable, with Gtk+ 2.20. Any ideas? James ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
RE: How to install pangocairo
All: Answered my own question. The pangocairo option failed to install because I did not have fontconfig installed. Installing fontconfig and reinstallaing cairo with fontconfig available solved the problem. Jim Tilton From: gtk-i18n-list-boun...@gnome.org [mailto:gtk-i18n-list-boun...@gnome.org] On Behalf Of Tilton, James C. (GSFC-6063) Sent: Wednesday, February 01, 2012 5:23 PM To: gtk-i18n-list@gnome.org Subject: How to install pangocairo I am installing some software that depends upon the pango - and pangocairo packages. I downloaded pango version 1.29.3 and performed the ./configure - make - make install sequence with no apparent errors (Note: I had previously install cairo version 1.10.2, also with no apparent errors.) However, even though it appears that the pango make built the pangocairo module, the make install step did not install it. How can I force the install of the pangocairo module? Thanks. Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ ___ gtk-i18n-list mailing list gtk-i18n-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
How to install pangocairo
I am installing some software that depends upon the pango - and pangocairo packages. I downloaded pango version 1.29.3 and performed the ./configure - make - make install sequence with no apparent errors (Note: I had previously install cairo version 1.10.2, also with no apparent errors.) However, even though it appears that the pango make built the pangocairo module, the make install step did not install it. How can I force the install of the pangocairo module? Thanks. Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ ___ gtk-i18n-list mailing list gtk-i18n-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
Re: misc and a question...
On 29/12/11 11:05, Gary Kline wrote:
... due to people on this list who have been patient and
'splained things ... and who have NOT said: 'go read the man page'
--well, nutshell, in ~ 3 weeks, i'm starting to see how gtk works.
i just learned that TRUE == 1 and not 0. i haven't used the access()
call in awhile. i am trying to catch catch errors before they crop
up.
the way i see my application being used, there won't be any xterms
or konsoles open to print a stderr or stdout. So: is there a way in
gtk to have a message dialog open that prints warning or whatever to
the new user?
#define eprintf(...) do { \
GtkWidget *dialog; \
dialog = gtk_message_dialog_new ((GtkWindow *)window, \
GTK_DIALOG_DESTROY_WITH_PARENT, \
GTK_MESSAGE_ERROR, \
GTK_BUTTONS_CLOSE, \
__VA_ARGS__); \
gtk_dialog_set_default_response(GTK_DIALOG (dialog),
GTK_RESPONSE_CLOSE); \
gtk_dialog_run (GTK_DIALOG (dialog)); \
gtk_widget_destroy (dialog); \
} while (0)
--
JS.
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Re: no luck with dialogs and ecrooolbars, and gtktext..
n Tue, Dec 20, 2011 at 02:52:10PM -0800, Gary Kline wrote: text = gtk_text_view_new(); gtk_container_add(GTK_CONTAINER(window),text); buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text)); and fopen some file and display the text in the buffer. The question remains: how? what am i missing to display some miscellaneous words in the text window? http://www.gtk.org/documentation.php ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: how to use hbox?
2011/12/11 Gary Kline kl...@thought.org: can somebody help me figure out how to pack the buttons horizontally, or is is not possible to mix hbox and vbox? It should be as simple as: make the vbox put the various items in it, including the hbox put the increase decrease buttons in the hbox. That certainly works in one of the example codes in gtk-fortran (hl_containers.f90). [An alternative might be to use a 2xn table and make most of the items span 2 columns.] ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Alignment of markup labels in menu items
I'm trying to add the capability to add a label formatted with Pango markup to buttons and menu items in the high-level interface to gtk-fortran. While the following is successful in producing subscripts in labels when the markup flag is set, there is a problem with alignment: while a plain text label is correctly centred in the pulldown menu, a markup label begins at the centre (even if it does not actually include any markup). if (markup) then item=gtk_menu_item_new() label_w=gtk_label_new(label) call gtk_label_set_markup(label_w, label) call gtk_container_add(item,label_w) else item = gtk_menu_item_new_with_label(label) end if Am I missing something, or is that a fundamental limitation? I'm using Gtk+-3.2.0, in Ubuntu 11.10, with gcc gfortran 4.6.1. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Alignment of markup labels in menu items
On 30 November 2011 11:31, James Tappin jtap...@gmail.com wrote: there is a problem with alignment: while a plain text label is correctly centred in the pulldown menu, a markup label begins at the centre (even if it does not actually include any markup). I should add, the problem does not manifest itself for simple gtk buttons. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk_tree_view_column_set_cell_data_func gives GTK-CRITICAL error
On 30/11/11 20:04, Tadej Borovšak wrote: Hi. 2011/11/30 James Stewardjamesstew...@optusnet.com.au: col = gtk_tree_view_insert_column_with_attributes ( GTK_TREE_VIEW (view), -1, Title, renderer, text, i, strikethrough, j, background, k, background-set, TRUE, NULL); gtk_tree_view_column_set_cell_data_func( gtk_tree_view_get_column(GTK_TREE_VIEW(view), col), renderer, render_float, GINT_TO_POINTER(i), NULL); IIRC, gtk_tree_view_insert_column_with_attributes() returns number of columns and gtk_tree_view_get_column() expects to get column number where first column is 0. So you may be off-by-one in your call to gtk_tree_view_column_set_cell_data_func(). Well spotted! Thanks very much. Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
gtk_tree_view_column_set_cell_data_func gives GTK-CRITICAL error
Hi,
Wanting to display floats with a particular format in a tree view.
void render_float(GtkTreeViewColumn *column,
GtkCellRenderer *renderer,
GtkTreeModel *model,
GtkTreeIter *iter,
gpointer user_data)
{
gfloat f;
gchar buf[20];
int col = GPOINTER_TO_INT(user_data);
gtk_tree_model_get(model, iter, col, f, -1);
g_snprintf(buf, sizeof(buf), %.2f, f);
g_object_set(renderer, text, buf, NULL);
}
G_MODULE_EXPORT gboolean on_menu_show_results_activate(
GtkWidget *w,
GdkEvent *event,
gpointer user_data)
{
...
renderer = gtk_cell_renderer_text_new ();
col = gtk_tree_view_insert_column_with_attributes (
GTK_TREE_VIEW (view),
-1,
Title,
renderer,
text, i,
strikethrough, j,
background, k,
background-set, TRUE,
NULL);
gtk_tree_view_column_set_cell_data_func(
gtk_tree_view_get_column(GTK_TREE_VIEW(view), col),
renderer,
render_float,
GINT_TO_POINTER(i),
NULL);
...
}
When I run the app I get:
Gtk-CRITICAL **: gtk_cell_layout_set_cell_data_func: assertion
`GTK_IS_CELL_LAYOUT (cell_layout)' failed
Can anyone spot what I've done wrong? There's no compiler warnings,
just this runtime error.
--
James.
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Change in FileChooser behavior
Hello List, I recently upgraded GTK+ version 2.24.7 and discovered that the behavior of the FileChooser has changed. This change makes FileChooser very inconvenient to use. Previously, the file selection dialog would automatically show the files in the current working directory. Now, the file selection dialog automatically lists Recently Used files, and there is no option to select the current working directory. Apparently I am setting up my FileChooser incorrectly. How to I set up FileChooser so that it provides me with an option to look in the current working directory? I see that there is a member function add_shortcut_folder that I could use to add the current working directory as a shortcut folder (but then I would have to mess around with C's getcwd() function). But I didn't need to explicitly set the current previously. Is it a requirement that I explicitly set it now? If so, why was this change made? It seems this should be a simple thing. What am I missing? Thanks. Jim Tilton Dr. James C. TiltonVoice: 301-286-9510 NASA Goddard Space Flight Center FAX: 301-286-1776 Mail Code 606.3E-Mail: james.c.til...@nasa.govmailto:james.c.til...@nasa.gov (Computational Information Sciences and Technology Office) Greenbelt, MD 20771 URLs: http://ipp.gsfc.nasa.gov/ft_tech_rhseg.shtm and http://science.gsfc.nasa.gov/606.3/TILTON/ ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: 'irregular shaped' windows without deprecated gdk code or compositing
On 31 July 2011 23:24, James Morris jwm.art@gmail.com wrote: Hi, It appears that the 'irregularly shaped' windows which used to be possible by using now-deprecated GDK code even without full compositing available, are no longer possible using non-deprecated code. Using the old deprecated code, a GdkRegion could be created with the desired window shape (with the region defining fully transparent and fully opaque areas) and a call to gdk_window_shape_combine_region to bring it about. I've been trying to work around this but feel like a dog running in circles chasing my tail. gdk_window_shape_combine_region is not deprecated, but GdkRegion will be replaced in GTK3.0 with cairo_region_t for which there is no gdk_window_shape_combine_region equivalent. Furthermore the gdk_region_polygon call necessary to create the GdkRegion of the desired shape, is deprecated without replacement. So I look into gdk_window_shape_combine_mask instead, but gdk_bitmap_create_from_data is of course deprecated. The docs do at least suggest cairo alternatives, but none of which are compatible with gdk_window_shape_combine_mask. I'm just going to start looking into these functions: cairo_xlib_surface_create_for_bitmap as they *might* do what I wish. Please please tell me if there's anyway around this mess. I can't force or assume use of compositing. Cheers, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
'irregular shaped' windows without deprecated gdk code or compositing
Hi, It appears that the 'irregularly shaped' windows which used to be possible by using now-deprecated GDK code even without full compositing available, are no longer possible using non-deprecated code. Using the old deprecated code, a GdkRegion could be created with the desired window shape (with the region defining fully transparent and fully opaque areas) and a call to gdk_window_shape_combine_region to bring it about. I've been trying to work around this but feel like a dog running in circles chasing my tail. gdk_window_shape_combine_region is not deprecated, but GdkRegion will be replaced in GTK3.0 with cairo_region_t for which there is no gdk_window_shape_combine_region equivalent. Furthermore the gdk_region_polygon call necessary to create the GdkRegion of the desired shape, is deprecated without replacement. So I look into gdk_window_shape_combine_mask instead, but gdk_bitmap_create_from_data is of course deprecated. The docs do at least suggest cairo alternatives, but none of which are compatible with gdk_window_shape_combine_mask. Please please tell me if there's anyway around this mess. I can't force or assume use of compositing. Cheers, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
slightly OT: install IITM multi-lingual editor
OT: install IITM multi-lingual editor on Linux (developed using the GTK tool kit and so the GTK library is required for running the editor. The current implementation has been tried only under RedHat 6.2 and RedHat 7.2.) $ uname -a Linux localhost 2.6.22.19-desktop-2mdv #1 SMP Mon May 5 20:55:05 EDT 2008 i686 Intel(R) Pentium(R) 4 CPU 1.70GHz GNU/Linux Install went without error, but upon trying to run the application, while I got the expected window (and the GUI appears to respond properly...at least superficially, as I haven't tried to do anything as yet) I also got the following error messages in the terminal window (CLI) ... $ ./iitmeditor Gtk-WARNING **: Failed to load module libgail.so: libgail.so: cannot open shared object file: No such file or directory Gtk-WARNING **: Failed to load module libatk-bridge.so: libatk-bridge.so: cannot open shared object file: No such file or directory ** WARNING **: Couldn't find pixmap file: new.xpm ** WARNING **: Couldn't find pixmap file: open.xpm ** WARNING **: Couldn't find pixmap file: save.xpm More detail upon request, of course ... any help or pointers would greatly be appreciated ... Thank you Regards Fred James ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Append to list store doesn't get all column attributes
Hi, (Sorry if this appears twice. I sent it from the wrong address earlier.) In a dialog with a scrolled window displaying a list, with one column in the view, where the cells are editable; gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (view), -1, Name, renderer, text, 0, editable, TRUE, NULL); A button in the dialog allows the user to add to the list with; gtk_list_store_append(store, iter); gtk_list_store_set(store, iter, 0, New, 1, 0, -1); p = gtk_tree_model_get_path(model, iter); c = gtk_tree_view_get_column(GTK_TREE_VIEW (view), 0); gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW (view), p, NULL, FALSE, 0.0, 0.0); gtk_tree_view_set_cursor(GTK_TREE_VIEW (view), p, c, TRUE); gtk_widget_grab_focus (view); The item New is indeed appended to the list, and it scrolls to the correct cell, however New is not editable, and no matter what I've tried, I can't make it editable. Can anyone offer a clue as to why? Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Append to list store doesn't get all column attributes
On Thu, 2011-07-28 at 07:08 +0200, Florian Müllner wrote: Hey, 2011/7/28 James jamesstew...@optusnet.com.au In a dialog with a scrolled window displaying a list, with one column in the view, where the cells are editable; gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (view), -1, Name, renderer, text, 0, editable, TRUE, NULL); This links the text (content) attribute of the tree view column to the first column of the model, and the editable attribute to the second one (TRUE == 1). Well, that's embarrassing. It is so obvious when you point it out. Can I claim tired eyes? ;-) A button in the dialog allows the user to add to the list with; gtk_list_store_append(store, iter); gtk_list_store_set(store, iter, 0, New, 1, 0, -1); Here you add a row with (New, 0) to the list - whatever the intention of the second column, the tree view will use it to determine whether the cell should be editable, and given that 0 == FALSE, it won't be :-) If you want all cells to be editable, the easiest way is to call g_object_set (renderer, editable, TRUE, NULL); when setting up the tree view (assuming that you are using a GtkCellRendererText). Of course, changing the gtk_list_store_set() call to set the second column to TRUE would work as well ... Yup, all fixed now. Thanks, Florian. Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Check if dbus program is running
Kevin Anthony wrote: Hello What would be the best way, in C, to check if a dbus program was running, before i ran a dbus command against it? Lost me ... at the system level, ps -ef (or some similar call) piped to grep dbus ps -ef | grep dbus | grep -v grep will probably show several hits ... anywhere near what you are talking about? Regards Fred James [fredjame@localhost ~]$ ps -ef | grep dbus | grep -v grep 145631 1 0 01:10 ?00:00:00 dbus-daemon --system fredjame 7403 1 0 07:52 ?00:00:00 /usr/bin/dbus-launch --exit-with-session --sh-syntax fredjame 7404 1 0 07:52 ?00:00:00 /usr/bin/dbus-daemon --fork --print-pid 4 --print-address 8 --session [fredjame@localhost ~]$ ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Making widgets visible outside their containing window
2011/7/13 Felix H. Dahlke f...@ubercode.de: Thanks for your answers. I did fool around with a popup, but it would also overlap other windows, transient or not. Furthermore, I need it to move relative to the window if that is moved. Maybe it's best if I tell you what I'm trying to do in particular: I'm working on something like a tooltip. However, I don't think I can use normal tooltips, since I need to position it manually (actually, I need it to move out of the way if the mouse cursor approaches it). A popup sounds like the right way to do this, but I need to somehow wire the popup's movement to the window's movement. Is there an easy way to do that? Take a look at PHAT fan sliders. These are sliders which vertical-mouse-movement brings up a fan through which the user gains more precision in the slider position. The fans are not bounded by any window the widget is associated with. There might be some pointers in there for how to do what you want, but note it's unmaintained code by now, and also contains some deprecated code. http://phat.berlios.de/ James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
gobject and gtk_widget_set_sensitive
Hi, I have a custom widget I've created which uses widgets from a 3rd party library. When I use gtk_widget_set_sensitive(my_widget, FALSE), some of the widgets from the other library remain sensitive. Is this a bug in the 3rd party library? Or should I be using a callback to handle the state-changed signal to set_sensitive on all the widgets? Cheers, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Changing a GtkToolButton icon_widget on the fly
On 22 June 2011 05:43, James jamesstew...@optusnet.com.au wrote:
Hi,
I've been trying to change the icon_widget that's displayed for a
toolbar button while the main window is displayed. I can't seem to get
the actual image to change, although the functions that call
gtk_tool_button_set_icon_widget(0 do get called. There's no warnings
either.
I do something like...
GtkWidget *eject_widget;
GtkWidget *eject_red_widget;
GtkToolButton *eject_button;
void green(void)
{
gtk_tool_button_set_icon_widget(eject_button, eject_widget);
}
void red(void)
{
gtk_tool_button_set_icon_widget(eject_button, eject_red_widget);
}
int main(int argc, char **argv)
{
snip
GtkBuilder *builder;
builder = gtk_builder_new();
gtk_builder_add_from_file(builder, stridemaster.xml, NULL);
eject_widget = GTK_WIDGET(gtk_builder_get_object(builder,
eject_tracker_image));
eject_red_widget = GTK_WIDGET(gtk_builder_get_object(builder,
eject_tracker_red_image));
eject_button = GTK_TOOL_BUTTON(gtk_builder_get_object(builder,
toolbutton_eject_tracker));
g_object_unref(G_OBJECT(builder));
gtk_widget_show(window);
gtk_main();
snip
}
What am I missing?
The problem might be to do with floating versus fixed references. GTK
will usually unreference the images once it thinks they're finished
with - ie when you change the icon, it will think you no longer wish
to use the previous icon.
Try calling g_object_ref_sink on all of the widget icons once you've
created them, and then g_object_unref after you're done.
James.
Regards,
James.
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Changing a GtkToolButton icon_widget on the fly
Hi,
I've been trying to change the icon_widget that's displayed for a
toolbar button while the main window is displayed. I can't seem to get
the actual image to change, although the functions that call
gtk_tool_button_set_icon_widget(0 do get called. There's no warnings
either.
I do something like...
GtkWidget *eject_widget;
GtkWidget *eject_red_widget;
GtkToolButton *eject_button;
void green(void)
{
gtk_tool_button_set_icon_widget(eject_button, eject_widget);
}
void red(void)
{
gtk_tool_button_set_icon_widget(eject_button, eject_red_widget);
}
int main(int argc, char **argv)
{
snip
GtkBuilder *builder;
builder = gtk_builder_new();
gtk_builder_add_from_file(builder, stridemaster.xml, NULL);
eject_widget = GTK_WIDGET(gtk_builder_get_object(builder,
eject_tracker_image));
eject_red_widget = GTK_WIDGET(gtk_builder_get_object(builder,
eject_tracker_red_image));
eject_button = GTK_TOOL_BUTTON(gtk_builder_get_object(builder,
toolbutton_eject_tracker));
g_object_unref(G_OBJECT(builder));
gtk_widget_show(window);
gtk_main();
snip
}
What am I missing?
Regards,
James.
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Re: Cairo, Gtk+, Gdk GdkPixbuf -- making a pixel-based backing store for vector graphics
Just to let folks know that the pointers here have given me the lead in that I needed and I've got a working code. (A bit more elegant in the Gtk3 case than Gtk2 but both work). ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Cairo, Gtk+, Gdk GdkPixbuf -- making a pixel-based backing store for vector graphics
I would like to be able to make a code that draws some (possibly very complex) vector graphics, copies it to an off-screen backing store and then when an expose-event (Gtk2) or draw signal (Gtk3) is received, the backing store is copied to the screen rather than doing a complete redraw of all the vectors which could potentially take several seconds. Unfortunately all the potential model codes I've been able to find use the obsolete Gdk Pixmap as backing store. Likewise the routine that looks promising gdk_pixbuf_render_to_drawable () is marked as deprecated (since 2.4) and suggests gdk_draw_pixbuf () as an alternative. However that is also marked deprecated (since 2.22) and recommends gdk_cairo_set_source_pixbuf() and cairo_paint() or cairo_rectangle() and cairo_fill() but it is not at all clear how to combine those routines to produce the required effect. I have searched many times for suitable examples and come up empty. So does anybody here have any suggestions, examples or link that provide pointers to the following operations?: 1) Getting cairo to draw to a pixmap or pixbuf, or draw to a window and then copy the resulting window contents to an in-memory storage. 2) Making the expose handler copy that pixbuf (or whatever) to the visible window (while only copying the affected region would be the best option I can live with copying the whole window). 3) (Less important for now) Adding new material to the plot and updating the backing store -- my guess is that once I crack 1 2 then 3 will be fairly obvious. James ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Cairo, Gtk+, Gdk GdkPixbuf -- making a pixel-based backing store for vector graphics
On 14 June 2011 15:00, Stefan Salewski m...@ssalewski.de wrote: On Tue, 2011-06-14 at 14:30 -0600, James Tappin wrote: I would like to be able to make a code that draws some (possibly very complex) vector graphics, A better place for asking may be the cairo mailing list? At least there was some discussion about such tasks in the past. One recommended way was using cairos create_similar() function for creating the backup surface. I did a small demo in Ruby some time ago, see http://www.ssalewski.de/PetEd-Demo.html.en I found this related thread with some helpful replies: http://lists.freedesktop.org/archives/cairo/2009-March/016756.html It looks as if this example: http://www.gtkforums.com/viewtopic.php?t=5204, may at least provide part of the answer to (1) in my original posting -- I'm still trying to disentangle the housekeeping and the real logic, to figure exactly what it does. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Maximize on Windows 7 seems broken.
On 11/05/2011 8:07 AM, James Steward wrote: Hi, I'm developing on Windows 7, 64 bit, using MinGW/MSYS for familiarity with a Posix type system. I have installed gtk+-bundle_2.22.1-20101227_win32.zip, and building a 32bit app for compatibility. My application calls gtk_window_maximize(GTK_WINDOW(window)); but the resulting window is not maximized properly. It sits below the top of the screen, and is cut off at the bottom of the screen. Also, restoring the window, then dragging to the top of the screen to allow Bill to maximize it results in the same. Running on an XP machine, the maximize works fine, as it does on Linux. Is this a known Windows 7 (possibly also Vista) problem with GTK+ apps? Is there a fix? I've googled around, but not hit on any solutions yet. I have a v small test case. Can I attach it here? Let's find out... I also have a screenshot if anyone is interested. Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Maximize on Windows 7 seems broken.
On 13/05/2011 8:03 AM, James Steward wrote: On 11/05/2011 8:07 AM, James Steward wrote: Hi, I'm developing on Windows 7, 64 bit, using MinGW/MSYS for familiarity with a Posix type system. I have installed gtk+-bundle_2.22.1-20101227_win32.zip, and building a 32bit app for compatibility. My application calls gtk_window_maximize(GTK_WINDOW(window)); but the resulting window is not maximized properly. It sits below the top of the screen, and is cut off at the bottom of the screen. Also, restoring the window, then dragging to the top of the screen to allow Bill to maximize it results in the same. Running on an XP machine, the maximize works fine, as it does on Linux. Is this a known Windows 7 (possibly also Vista) problem with GTK+ apps? Is there a fix? I've googled around, but not hit on any solutions yet. I have a v small test case. Can I attach it here? Let's find out... I also have a screenshot if anyone is interested. Well, that didn't seem to work very well. In the meantime I've found the answer. I had these properties set on the main window. property name=window_positioncenter-always/property property name=default_width1024/property Removing them and the window maximizes properly. The hint came from bug https://bugzilla.gnome.org/show_bug.cgi?id=587591 . Hope this helps someone else. Regards, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
GdkEvent question (is it a bug?)
While working on a script to convert the GdkEvent structures to
Fortran derived types for the GtkFortran project I came across the
following
struct _GdkEventClient
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkAtom message_type;
gushort data_format;
union {
char b[20];
short s[10];
long l[5];
} data;
};
This looks to me like a 32-bit-specific construct as (a) there's no
int type and (b) on a 64-bit system the long tag in the union will be
twice as long as the short char tags, should this be regarded as a
bug?
Also, since Fortran's iso_c_binding does not have any support for
unions so any attempt to include this will be at best a kludge, is
this an important event ?
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Maximize on Windows 7 seems broken.
Hi, I'm developing on Windows 7, 64 bit, using MinGW/MSYS for familiarity with a Posix type system. I have installed gtk+-bundle_2.22.1-20101227_win32.zip, and building a 32bit app for compatibility. My application calls gtk_window_maximize(GTK_WINDOW(window)); but the resulting window is not maximized properly. It sits below the top of the screen, and is cut off at the bottom of the screen. Also, restoring the window, then dragging to the top of the screen to allow Bill to maximize it results in the same. Running on an XP machine, the maximize works fine, as it does on Linux. Is this a known Windows 7 (possibly also Vista) problem with GTK+ apps? Is there a fix? I've googled around, but not hit on any solutions yet. James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Maximize on Windows 7 seems broken.
On 11/05/2011 8:19 AM, Matteo Landi wrote: On Wed, May 11, 2011 at 12:07 AM, James Steward jamesstew...@optusnet.com.au wrote: Hi, I'm developing on Windows 7, 64 bit, using MinGW/MSYS for familiarity with a Posix type system. I have installed gtk+-bundle_2.22.1-20101227_win32.zip, and building a 32bit app for compatibility. My application calls gtk_window_maximize(GTK_WINDOW(window)); but the resulting window is not maximized properly. It sits below the top of the screen, and is cut off at the bottom of the screen. Also, restoring the window, then dragging to the top of the screen to allow Bill to maximize it results in the same. Running on an XP machine, the maximize works fine, as it does on Linux. Is this a known Windows 7 (possibly also Vista) problem with GTK+ apps? Is there a fix? I've googled around, but not hit on any solutions yet. Is it maybe a problem with the window manager? I had problem trying to raise a window up if covered. Just guessing... Whether a problem with Bill's window manager or not, there must be a solution from Gtk. JS. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Basic GStreamer level example converted from C
Hello all,
I'm trying to convert into Perl the given C example of the level
element (using a message) found at:
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-level.html
Trivial, right? I'm using Debian/unstable, so GStreamer 0.15-2 (amd64
build) - nothing very bizzare. 42 lines of code that should be printing
out an RMS level from testaudiosrc for each channel every second:
#!/usr/bin/perl
use strict;
use warnings;
use GStreamer -init;
my $loop = Glib::MainLoop-new;
my $pipeline = GStreamer::Pipeline-new(sample);
my $caps = GStreamer::Caps-from_string(audio/x-raw-int,channels=2);
my $testsrc = GStreamer::ElementFactory-make(audiotestsrc, src);
my $convert = GStreamer::ElementFactory-make(audioconvert,
convert);
my $level = GStreamer::ElementFactory-make(level, level);
my $sink = GStreamer::ElementFactory-make(fakesink, sink);
$pipeline-add($testsrc, $convert, $level, $sink);
$testsrc-link($convert);
$convert-link_filtered($level, $caps);
$level-link($sink);
$level-set(message, 1);
$level-set(interval, 10); # 1 second interval
$pipeline-get_bus-add_watch(\hdl_level, $loop);
$pipeline-set_state(playing);
$loop-run;
$pipeline-set_state(null);
exit;
sub hdl_level {
my ($bus, $message, $loop) = @_;
printf Got message: %s\n, $message-type;
return unless $message-type eq element;
my $structure = $message-get_structure;
my $name = $structure-get_name;
return unless $name eq level;
my @rms = $structure-get_value(rms);
foreach (@rms) {
print RMS: $_\n;
}
return 1;
}
And my output is:
Got message: [ unknown state-changed ]
Use of uninitialized value in subroutine entry at ./simple.pl line 26.
So 1st line is fine, I know the handler callback is registered; but
what's uninitalized (at the run() call) and why isn't it printing the
RMS output? I can;t see what I've missed from the C example here
Many thanks,
James
--
Email: james_AT_rcpt.to
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gtk_tree_view_column query.
Hello, I'm working on some aspects of gtk-fortran (an interface of GTK+ to Fortran95/2003), and so need to implement things without using varargs routines. However I'm getting unexpected behaviours. I don't think the problem is in the Fortran interface as I can reproduce the errors in C-examples. The first is in setting up the column attributes, the original C code was: column = gtk_tree_view_column_new_with_attributes(#, renderer, text, 0, NULL); Which if I interpret the manual correctly ought to be replaceable by: column = gtk_tree_view_column_new(); gtk_tree_view_column_set_title(column, #); gtk_tree_view_column_add_attribute(column, renderer, text, 0); But the latter gives an assertion error: (list1:6044): Gtk-CRITICAL **: gtk_tree_view_column_cell_layout_add_attribute: assertion `info != NULL' failed The second comes when trying to add a value to a column, the original was: gtk_list_store_set(store,iter, 0, nrow, -1); /* The index column */ Which (again if I'm interpreting the manual right) should be equivalent to: gtk_list_store_set_value(store, iter, 0, (Gvalue *) nrow); but instead the latter gives a segfault 0x755effc9 in type_check_is_value_type_U (value=0x7fffdcac) at /build/buildd/glib2.0-2.26.1/gobject/gtype.c:4073 Does anybody see a grave error in interpreting the manual or is there a real problem with some of these routines? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: gtk_tree_view_column query.
On 17 March 2011 15:55, James Tappin jtap...@gmail.com wrote: Hello, I'm working on some aspects of gtk-fortran (an interface of GTK+ to Fortran95/2003), and so need to implement things without using varargs routines. However I'm getting unexpected behaviours. I don't think the problem is in the Fortran interface as I can reproduce the errors in C-examples. I should have added: I'm running 64-bit Linux and using gcc ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: How to make the toolbar button flashing
On 1 March 2011 08:20, Miroslav Rajcic raj...@sokrates.hr wrote:
I am trying to make the Pause button flash (or show any similar behaviour
similar to that) when the pause state is active.
So far I tried many things, but none of these seem to work:
- changing the button background color
- changing the button stock icon
Alternating between two different stock items is quite easy when you
know how, but I had to ask here for help.
If you have two images,
--8---
img1 = gtk_image_new_from_stock( GTK_STOCK_MEDIA_PLAY,
GTK_ICON_SIZE_SMALL_TOOLBAR);
img2 = gtk_image_new_from_stock( GTK_STOCK_MEDIA_STOP,
GTK_ICON_SIZE_SMALL_TOOLBAR);
/* convert img1 and img2 from floating references which
are deleted when no longer in use, to a normal reference.
this prevents either of the images being deleted when we
swap the play/stop button images. unref'd after gtk_main.
*/
g_object_ref_sink(img1);
g_object_ref_sink(img2);
--8---
then in your idle callback simply use gtk_button_set_image,
alternating between the two images every time the function is called
(ie you could use a static gboolean to track which button to show each
time).
then once gtk_main returns:
--8---
gtk_main();
/* free the play stop images */
g_object_unref(img1);
g_object_unref(img2);
--8---
http://github.com/jwm-art-net/BoxySeq/blob/master/boxyseq_gui/gui_main.c
- changing the button relief style
Relevant code is following:
//start timer to alternate the button state
nBlinkButtonTimerID = g_timeout_add (900, flash_pause_button_timer, NULL);
gboolean flash_pause_button_timer(gpointer data)
{
static bool bFlipFlop = false;
bFlipFlop = !bFlipFlop;
//get pointers to the relevant buttons
GtkToolbar *toolbar2 = (GtkToolbar *)lookup_widget(window1, toolbar2);
GtkWidget *tool_pause = (GtkWidget *)gtk_toolbar_get_nth_item(toolbar2, 2);
GList *children1 = gtk_container_get_children(GTK_CONTAINER(tool_pause));
GtkButton *button = (GtkButton *)g_list_nth_data (children1, 0);
g_list_free(children1);
GtkWidget *tool_stop = (GtkWidget *)gtk_toolbar_get_nth_item(toolbar2, 1);
//create two alternating colors (standard bkg and black bkg)
GtkStyle* style = gtk_rc_get_style(tool_stop);
GdkColor rgbStart = style-bg[GTK_STATE_NORMAL];
GdkColor rgbEnd = { 0, 0, 0, 0 };
//modify color
gtk_widget_modify_bg (GTK_WIDGET(button), GTK_STATE_NORMAL, (bFlipFlop)?
rgbEnd : rgbStart);
gtk_widget_modify_bg (GTK_WIDGET(button), GTK_STATE_ACTIVE, (bFlipFlop)?
rgbEnd : rgbStart);
gtk_widget_modify_base (GTK_WIDGET(button), GTK_STATE_NORMAL, (bFlipFlop)?
rgbEnd : rgbStart);
gtk_widget_modify_base (GTK_WIDGET(button), GTK_STATE_ACTIVE, (bFlipFlop)?
rgbEnd : rgbStart);
gtk_widget_queue_draw (GTK_WIDGET(button));
#if GTK_CHECK_VERSION(2,18,0)
gdk_window_process_updates (gtk_widget_get_window(GTK_WIDGET(button)),
TRUE);
#else
gdk_window_process_updates (GTK_WIDGET(button)-window, TRUE);
#endif
/*
GtkWidget *w1 =
gtk_tool_button_get_icon_widget(GTK_TOOL_BUTTON(tool_pause));
gtk_widget_modify_bg (w1, GTK_STATE_NORMAL, (bFlipFlop)? rgbEnd :
rgbStart);
gtk_widget_modify_bg (w1, GTK_STATE_ACTIVE, (bFlipFlop)? rgbEnd :
rgbStart);
gtk_widget_modify_base (w1, GTK_STATE_NORMAL, (bFlipFlop)? rgbEnd :
rgbStart);
gtk_widget_modify_base (w1, GTK_STATE_ACTIVE, (bFlipFlop)? rgbEnd :
rgbStart);
*/
//modify relief style
gtk_button_set_relief(button, (bFlipFlop)?
GTK_RELIEF_NORMAL:GTK_RELIEF_NONE);
//modify stock icon
gtk_tool_button_set_stock_id(GTK_TOOL_BUTTON(tool_pause), (bFlipFlop)?
GTK_STOCK_MEDIA_PAUSE : GTK_STOCK_MEDIA_RECORD);
gtk_tool_item_toolbar_reconfigured (GTK_TOOL_ITEM(tool_pause));
return TRUE;
}
Why doesn't any of these work ? Any tips ?
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-audio/image/text/code/
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Re: g_remove
On 17 February 2011 12:27, Craig Bakalian craigbakal...@verizon.net wrote: Hi, I am using g_remove to remove some temporary files from the /tmp folder. It is working as expected. Yet, gcc is complaining that I am making an implicit declaration. What is up with this? You've not #include-ed the necessary files? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: adding button events to a gtkdrawingarea based gobject
On 14 February 2011 13:20, James Morris jwm.art@gmail.com wrote: Hi, (forgive some imprecise names here, am writing from memory and in a rush before work) I'm adapting some code which uses gobject to create a widget. The code previously used GtkWidget as the parent_class but I am trying to adapt it to GtkDrawingArea as the parent_class. However, the button_press_event code is no longer activated within the custom widget now that it's a drawing area. How do I activate it? I know with an ordinary GtkDrawingArea if I want to add button-press-events to use gtk_add_events, but the code that uses the custom widget shouldn't need to do this and besides the widget needs to connect to it's own internal private implementation code anyway so gtk_add_events is obviously wrong. Can anyone provide some pointers please? Yes James, just add the call to gtk_widget_add_events into the yourwidget_init function. HTH! ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
adding button events to a gtkdrawingarea based gobject
Hi, (forgive some imprecise names here, am writing from memory and in a rush before work) I'm adapting some code which uses gobject to create a widget. The code previously used GtkWidget as the parent_class but I am trying to adapt it to GtkDrawingArea as the parent_class. However, the button_press_event code is no longer activated within the custom widget now that it's a drawing area. How do I activate it? I know with an ordinary GtkDrawingArea if I want to add button-press-events to use gtk_add_events, but the code that uses the custom widget shouldn't need to do this and besides the widget needs to connect to it's own internal private implementation code anyway so gtk_add_events is obviously wrong. Can anyone provide some pointers please? Thanks, James. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Memory leaks
On 9 February 2011 11:13, Tor Lillqvist t...@iki.fi wrote: With the right tool there is no problem at all in finding such true leaks. How does one gain this mysterious tool for Linux? I have used Valgrind but as mentioned by numerous souls at numerous times in the past, a suppressions file is needed for GTK/GLIB. And creating a suppressions file is more work than actually writing the code of the program I'm trying to debug in the first place is. james. ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Memory leaks
On 9 February 2011 16:10, Michael Cronenworth m...@cchtml.com wrote: James Morris wrote: How does one gain this mysterious tool for Linux? It's called Google. There's a web page[1] that details how to setup valgrind to debug gtk/glib apps and even a preliminary suppression file. [1] http://live.gnome.org/Valgrind That's called patronising. I have been there already. What good is a work in progress when the progress stopped over two years ago? Not only do we have to write our own code, we have to put work into making other peoples code ignore the errors in other peoples code so we can see the errors in our own code. It's a bloody outrage! ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
