Re: GList strange behavior

2012-08-16 Thread Ardhan Madras 
Hi,

Seem you did not read my reply clearly. I told you the behaviour of
g_list_append() and g_list_last() there.
Okay, so your question is (

"So, why g_list_append() dont' return me newly created list???"

If you pass NULL pointer to first arg of g_list_append() it will
returns a newly created list for you, save the address to the return
pointer. If you pass non NULL pointer (already created list) to first
arg of g_list_append() it will ALWAYS return the HEAD of the list and
will not create a new list.

It's better for you to read GList implementation source code.
(glist.c) to fully understand how it work.

Regards.


On Thu, Aug 16, 2012 at 2:08 AM, Vlasov Vitaly  wrote:
> Hello
> Thanks for answer.
>
> > Did you mean Last list element: 0x832c610 is differ from INIT list
>> prt: 0x830f080?
>  No.
>
> Lest's see...
> i got function "do_work" with:
> 1. new Glist init with random data
> 2. callback definition of button click: button_click(, GList 
> *list)
> let init list poiner = 0xfe
> button was clicked!
> Here button_click(GList *list)
> list in agrs = 0xfe
> new data record memory allocation.
> !!! g_list_append(data, list) !!!
> In my example it returns init list value (0xfe), but should returns 
> value
> of newly created list (0x832c610 in example).
>
> In example:
> INIT list prt: 0x830f080 - this is init list, which passed to
> button_callback
> In button callback:
> Created: 0x830f080, arg: 0x830f080 - first ptr is returned 
> list from
> g_list_append(), but it equal to init list. WTF??? HOW?? I need newly created
> list here...
> And i check added value with g_list_last(). It's equal 
> 0x832c610 and
> correct.
>
> So, why g_list_append() dont' return me newly created list???
>
> В сообщении от Среда 15 августа 2012 09:33:04 вы написали:
>> Hi,
>>
>> > In button_cb()...
>>
>> Did you mean Last list element: 0x832c610 is differ from INIT list
>> prt: 0x830f080?
>>
>> It's clear because  0x830f080 was the location of first list and
>> 0x832c610 is the last appended list.
>> g_list_prepend() return to the start of the list, g_list_last() return
>> the last of the list (address).
>>
>> > in test_glist()
>>
>> First you call temp = g_list_insert(test, ...), test = NULL, save the
>> list to temp pointer to GList,
>> second, you call temp = g_list_append(test, ...), nothing wrong with
>> that code! BUT if you suppose to insert 2nd list here, then you are
>> wrong. Because, test is STILL NULL. It returns the newly allocated
>> list again, that's why it's differ. You should call call temp =
>> g_list_append(temp,...) or to insert the next list.
>>
>> > In real program, i need to get newly created list pointer in function
>> > like button_cb(), but don't know how to do it.
>>
>> Just pass it through callback's argument or declare it as global variable.
>>
>> On Wed, Aug 15, 2012 at 8:04 AM, Vlasov Vitaly  wrote:
>> > Hi, list.
>> >
>> > I can't understand, why g_list_append return different values in
>> > my
>> >
>> > callback's(please read source). In first case i got same list, which was
>> > obtained from arguments. In second case g_list_append returns newly
>> > created list.
>> > Why result's is are not the same?
>> >
>> > In real program, i need to get newly created list pointer in function
>> > like button_cb(), but don't know how to do it.
>> >
>> > source: http://pastebin.com/4gMREKwd
>> >
>> > output on my laptop:
>> > INIT list prt: 0x830f080
>> > Created: 0x830f080, arg: 0x830f080
>> > Last list element: 0x832c610
>> > Init list ptr: 0x832c5c0
>> > Second list ptr: 0x830f120
>> > End
>> > ___
>> > gtk-app-devel-list mailing list
>> > gtk-app-devel-list@gnome.org
>> > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
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Re: widget_destroy() question

2012-08-16 Thread Michael Cronenworth 

On 08/16/2012 09:03 PM, Vlasov Vitaly wrote:

For example, i got frame in which packed vbox. In vbox packed in five
buttons.
If i call gtk_widget_destroy(), all packed widget's will be destroyed? or only
frame?


Calling widget_destroy will automatically destroy child widgets. If you 
want all widgets destroyed at one time you should destroy the vbox. If 
you want only one button destroyed you should call destroy on only that 
one button.

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widget_destroy() question

2012-08-16 Thread Vlasov Vitaly 
Hello list.

For example, i got frame in which packed vbox. In vbox packed in five 
buttons.
If i call gtk_widget_destroy(), all packed widget's will be destroyed? or only 
frame?
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gi._glib.GError: Invalid object type `VteTerminal'

2012-08-16 Thread Kip Warner 
Hey list,

I've created a window through Glade 3.12.1 which contains a VTE widget
within one of its sizers. It looks fine in Glade, but when I attempt to
call the builder's add_from_file("Gooey.glade"), I get the following
error at runtime:

$ ./Main.py
Traceback (most recent call last):
  File "./Main.py", line 194, in 
navigator = NavigatorApp()
  File "./Main.py", line 48, in __init__
self.builder.add_from_file("../Gooey/Launcher.glade")
  File "/usr/lib/python3/dist-packages/gi/types.py", line 43, in
function
return info.invoke(*args, **kwargs)
gi._glib.GError: Invalid object type `VteTerminal'

I am using Python 3.2.3 with binding for Gtk+ version 3.4.2. This is
strange because I am pretty sure I am importing the necessary modules
prior to loading with builder via the following:

from gi.repository import Gtk, Gdk, GObject
from gi.repository import Vte, GLib

Any help is appreciated. I'm finding the documentation on programming
Gtk+ 3 via Python 3 scant. Not to mention distros compounding the
difficulty frequently with old packages / bindings. Something that might
help would be a simple minimal that instantiates a Glade defined VTE
widget using Python 3 / Gtk+ 3.

Thanks for any help,

-- 
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OpenPGP encrypted/signed mail preferred
http://www.thevertigo.com

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Re: getting the icon pixbuf for a file

2012-08-16 Thread Andreas Rönnquist 
On Thu, 16 Aug 2012 19:43:26 +0200
Andreas Rönnquist  wrote:

> On Fri, 17 Aug 2012 00:01:08 +0800
> Just Fill Bugs  wrote:
> 
> > 于 08/16/2012 11:24 PM, Andreas Rönnquist 写道:
> > 
> > > Sorry, I mean loading the Pixbuf of the file-type / mime-type of a
> > > file - Not simply loading a file into a pixbuf. That is a bit more
> > > complicated getting...
> > >
> > 
> > Maybe this: 
> > 
> > 
> > 
> > GIcon *g_file_info_get_icon(GFileInfo *info);
> > 
> 
> That indeed did the trick! (See attached file for the functions I
> used.)
> 

Oh, the attachment didn't get to the list - This is how I did it:


/**
 *
 */
GdkPixbuf *get_pixbuf_from_icon(GIcon *icon, GtkIconSize size)
{
GdkPixbuf *result=NULL;
GtkIconTheme *theme;
GtkIconInfo *info;
gint width;

if (!icon)
return NULL;

theme=gtk_icon_theme_get_default();
gtk_icon_size_lookup(size,&width,NULL);

info=gtk_icon_theme_lookup_by_gicon(theme,
icon,
width,
GTK_ICON_LOOKUP_USE_BUILTIN);

if (!info)
return NULL;

result=gtk_icon_info_load_icon(info,NULL);
gtk_icon_info_free(info);

return result;
}


/**
 *
 */
GdkPixbuf *get_pixbuf_from_file(GFile *file, GtkIconSize size)
{
GIcon *icon;
GFileInfo *info;

GdkPixbuf *result=NULL;

info=g_file_query_info(file,
   G_FILE_ATTRIBUTE_STANDARD_ICON,
   G_FILE_QUERY_INFO_NONE,
   NULL,
   NULL);

if (!info)
return NULL;

icon=g_file_info_get_icon(info);

if (icon!=NULL) {
result=get_pixbuf_from_icon(icon,size);
}

g_object_unref(info);

return result;
}


Again - thanks guys!

/Andreas
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Re: getting the icon pixbuf for a file

2012-08-16 Thread Andreas Rönnquist 
On Fri, 17 Aug 2012 00:01:08 +0800
Just Fill Bugs  wrote:

> 于 08/16/2012 11:24 PM, Andreas Rönnquist 写道:
> 
> > Sorry, I mean loading the Pixbuf of the file-type / mime-type of a
> > file - Not simply loading a file into a pixbuf. That is a bit more
> > complicated getting...
> >
> 
> Maybe this: 
> 
> 
> 
> GIcon *g_file_info_get_icon(GFileInfo *info);
> 

That indeed did the trick! (See attached file for the functions I used.)

Thanks guys! 

/Andreas
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Re: getting the icon pixbuf for a file

2012-08-16 Thread Andreas Rönnquist 
On Fri, 17 Aug 2012 00:01:08 +0800
Just Fill Bugs  wrote:

> 于 08/16/2012 11:24 PM, Andreas Rönnquist 写道:
> 
> > Sorry, I mean loading the Pixbuf of the file-type / mime-type of a
> > file - Not simply loading a file into a pixbuf. That is a bit more
> > complicated getting...
> >
> 
> Maybe this: 
> 
> 
> 
> GIcon *g_file_info_get_icon(GFileInfo *info);
> 


Ah! That link indeed looks quite useful! Thanks!

/Andreas
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Re: getting the icon pixbuf for a file

2012-08-16 Thread Frank Cox 
On Thu, 16 Aug 2012 17:24:02 +0200
Andreas Rönnquist wrote:

> Sorry, I mean loading the Pixbuf of the file-type / mime-type of a
> file - Not simply loading a file into a pixbuf. That is a bit more
> complicated getting...

Do you mean something like this?

GtkWidget *icon;
GdkPixbuf *pixbuf;
pixbuf=gdk_pixbuf_new_from_file_at_scale("filename.png",500,-1,TRUE,NULL); 
icon=gtk_image_new_from_pixbuf(pixbuf);
gtk_box_pack_start(GTK_BOX(mainmenuwidgets.action), icon, FALSE, FALSE, 30);

-- 
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www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER!
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Re: getting the icon pixbuf for a file

2012-08-16 Thread Just Fill Bugs 

于 08/16/2012 11:24 PM, Andreas Rönnquist 写道:


Sorry, I mean loading the Pixbuf of the file-type / mime-type of a
file - Not simply loading a file into a pixbuf. That is a bit more
complicated getting...



Maybe this: 




GIcon *g_file_info_get_icon(GFileInfo *info);




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Re: getting the icon pixbuf for a file

2012-08-16 Thread Andreas Rönnquist 
On Thu, 16 Aug 2012 22:41:28 +0800
Just Fill Bugs  wrote:

> 于 08/16/2012 07:58 PM, Andreas Rönnquist 写道:
> > Hey
> >
> > I am trying to get the icon bitmap for a file and insert it into a
> > TreeView widget - That is the pixbuf for the mime-type of a file. Is
> > there any examples of doing this in plain C using GTK/GLib?
> >
> > I am satisfied with an example that work in Linux - Win32 isn't
> > equally important to me.
> >
> 
> 
> 
> #include 
> 
> ...
> GdkPixbuf *pix;
> pix = gdk_pixbuf_new_from_file (fname, None);
> if (!pix) return;
> 
> boom! cannot be easier than that!

Sorry, I mean loading the Pixbuf of the file-type / mime-type of a
file - Not simply loading a file into a pixbuf. That is a bit more
complicated getting...

Sorry for not being more precise.

/Andreas
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Re: GList strange behavior

2012-08-16 Thread David Nečas 
On Thu, Aug 16, 2012 at 06:49:25PM +0400, Vlasov Vitaly wrote:
> I need to save newly created list poiner.

No.

Many operations change the list head (by adding, removing, reordering,
..., elements).  In general, if an operation returns the new list head
you *must* save and use that in subsequent operations.

>  So, i need to use g_list_last() to 
> save it? Is there another method to save created list pointer?

*Every* operation that may change the list head returns the new list
head.  That's the pointer to use.

Yeti

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Re: getting the icon pixbuf for a file

2012-08-16 Thread Tadej Borovšak 
Hi.

> I am trying to get the icon bitmap for a file and insert it into a
> TreeView widget - That is the pixbuf for the mime-type of a file. Is
> there any examples of doing this in plain C using GTK/GLib?

I think you'll want gtk_widget_render_icon() function [1]. This will
use current theme settings to load proper icon and render it. For icon
names, you can consult gtk-demo application that features icon
browser.

Cheers,
Tadej


[1] http://developer.gnome.org/gtk3/stable/GtkWidget.html#gtk-widget-render-icon

-- 
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tadej.borov...@gmail.com
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Re: GList strange behavior

2012-08-16 Thread Vlasov Vitaly 
Thank you! I almost understand bahavior of GList.

I need to save newly created list poiner. So, i need to use g_list_last() to 
save it? Is there another method to save created list pointer?

В сообщении от Четверг 16 августа 2012 15:51:22 вы написали:
> Hi.
> 
> Not sure what is troubling you here. GList is represented by pointer
> to first element or NULL if list is empty. And when you append items
> to the list, the address of the list stays the same, since first
> element of the list is unchanged (exception to this is when append
> first element to an empty list).
> 
> Some code to explain some things:
> 
> GList *list = NULL /* Empty list */
> list = g_list_append (list, GINT_TO_POINTER (1)); /* Add first
> element, list points to some ADDR1 */
> list = g_list_append (list, GINT_TO_POINTER (2)); /* Add second
> element, list still points to ADDR1 */
> ...
> 
> Cheers,
> Tadej
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Re: getting the icon pixbuf for a file

2012-08-16 Thread Just Fill Bugs 

于 08/16/2012 07:58 PM, Andreas Rönnquist 写道:

Hey

I am trying to get the icon bitmap for a file and insert it into a
TreeView widget - That is the pixbuf for the mime-type of a file. Is
there any examples of doing this in plain C using GTK/GLib?

I am satisfied with an example that work in Linux - Win32 isn't equally
important to me.





#include 

...
GdkPixbuf *pix;
pix = gdk_pixbuf_new_from_file (fname, None);
if (!pix) return;

...


boom! cannot be easier than that!

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getting the icon pixbuf for a file

2012-08-16 Thread Andreas Rönnquist 
Hey

I am trying to get the icon bitmap for a file and insert it into a
TreeView widget - That is the pixbuf for the mime-type of a file. Is
there any examples of doing this in plain C using GTK/GLib?

I am satisfied with an example that work in Linux - Win32 isn't equally
important to me.

Help would be very much appreciated.

/Andreas
mailingli...@gusnan.se
gus...@gusnan.se
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Re: GList strange behavior

2012-08-16 Thread Tadej Borovšak 
Hi.

Not sure what is troubling you here. GList is represented by pointer
to first element or NULL if list is empty. And when you append items
to the list, the address of the list stays the same, since first
element of the list is unchanged (exception to this is when append
first element to an empty list).

Some code to explain some things:

GList *list = NULL /* Empty list */
list = g_list_append (list, GINT_TO_POINTER (1)); /* Add first
element, list points to some ADDR1 */
list = g_list_append (list, GINT_TO_POINTER (2)); /* Add second
element, list still points to ADDR1 */
...

Cheers,
Tadej

-- 
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