Re: [Vala] Application Menu

[Steven Oliver]

Nor Jaidi,
Thank you very much for the response!

I do have that attribute set as you suggested. Here is my gresources.xml file:
https://github.com/steveno/balistica/blob/master/ui/menu.ui

And here is where I create the menu using Vala (lines 69 and 117 - 125):
https://github.com/steveno/balistica/blob/master/src/BalisticaApplication.vala
Steven N. Oliver


On Sun, Jan 21, 2018 at 9:17 PM, Nor Jaidi Tuah
 wrote:
>
>>  var menu = builder.get_object ("appmenu") as MenuModel ;
>>  set_app_menu (menu) ;
>
> Have you set the scope as in
>
>   "app.quit"
>
> Nice day
> Nor Jaidi Tuah
>
> ps. Sorry for the previous empty message. Don't know
> what went wrong.
>
>
>
>
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Re: [Vala] compiler warning for Variant.strv()

[Al Thomas via vala-list]

> On Thursday, 25 January 2018, 10:32:07 GMT, Yasushi SHOJI 
 wrote:  
> void main () {
>         Variant ary = new Variant.strv({"foo", "bar", "baz"});
> }


> In file included from /usr/include/glib-2.0/glib/gmessages.h:35:0,
>                 from /usr/include/glib-2.0/glib.h:62,
>                 from /tmp/a.vala.c:5:
> /usr/include/glib-2.0/glib/gvariant.h:118:33: note: expected ‘const
> gchar * const* {aka const char * const*}’ but argument is of type
> ‘gchar ** {aka char **}’
> GVariant *                      g_variant_new_strv
>   (const gchar * const  *strv,

You can use Vala's implicit conversion module to create a string array.I've 
figured out how to do this for string arrays, not just basic types. Itdoesn't 
produce the C warnings when compiling:
void main () {    string[] my_array = {"foo", "bar", "baz"};
    test (my_array);
    Variant my_variant = my_array;
    test (my_variant);
 }

void test (Variant variant) {
    print (@"$(variant.get_type_string ())\n");
    print (@"$(variant.print (true))\n");
}

The implicit conversion is invoked when assigning the array to a variable of 
type Variant. It is also invoked when passing the string array as an argumentto 
a function that expects a Variant type parameter.
This also works for GLib HashTable, which is a dictionary over D-Bus. This 
should be very useful for using DBusConnection. Code snippet:
var a = new HashTable of string, Variant ( str_hash, str_equal );
a.insert( "first", 1 );
a.insert( "second", "test" );
b:Variant = a;

A couple of references for anyone 
interested:https://wiki.gnome.org/Projects/Vala/DBusServerSample#Type_Table
https://valadoc.org/gio-2.0/GLib.DBusConnection.html

All the best,
Al

  
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Re: [Vala] Need help to scroll a textview using a scale

[Manish Jain]

  void scale_moved (Gtk.Range range)
  {
  int i;
  Gtk.TextIter iter = new Gtk. TextIter();
  view.get_iter_at_position(out iter, out i, 0, 0);
  iter.set_line(iter.get_line() + 10);
  view.scroll_to_iter(iter, 0, false, 0, 0);
  }



GtkTextView implements GtkScrollable, which means you can get a 
GtkAdjustment for the vertical range.


Something like:

  range.adjustment = text_view.vadjustment;



Hi Christian,

Tx for replying.

I got it to work by initializing the iterator from the buffer, not the view:
view.buffer.get_iter_at_line(). I do not know why it does not work the
other round too -- I hope to learn someday  : - )

It is all working nicely now. Vala and valadoc sites have excellent
documentation - which is a boon for newbies like me.

For the first time, I am beginning to enjoy putting up GUI's -- this used
to be such a pain earlier.

Regards
Manish Jain

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Re: [Vala] Need help to scroll a textview using a scale

[Christian Hergert]

On 01/24/2018 10:03 AM, Manish Jain wrote:

My last effort at the event handler is below (it is of no use, really):

  void scale_moved (Gtk.Range range)
  {
  int i;
  Gtk.TextIter iter = new Gtk. TextIter();
  view.get_iter_at_position(out iter, out i, 0, 0);
  iter.set_line(iter.get_line() + 10);
  view.scroll_to_iter(iter, 0, false, 0, 0);
  }



GtkTextView implements GtkScrollable, which means you can get a 
GtkAdjustment for the vertical range.


Something like:

  range.adjustment = text_view.vadjustment;

You can also just add the textview to a GtkScrolledWindow.

-- Christian
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[Vala] Need help to scroll a textview using a scale

[Manish Jain]

Hi,

I am new to vala and am trying to pick up the fundamentals.

I was trying to create a a GTK application with 3 components:

 Gtk.ScrolledWindow scrolled;
 Gtk.TextView view;
 Gtk.Scale v_scale;

The scrolled view widget is to display a text file read at run time.

I would like to the view's current contents to be controlled by the 
v_scale: when v_scale slider is 0, the view shows the beginning of the 
file, and when v_scale slider is close to 100, the view shows the last 
few characters/lines in the file.

Despite a lot of effort to write an event handler, I still cannot get 
the scale to tell the view to scroll.

Can somebody please tell me how to control the view's position with the 
scale in Vala ?

My last effort at the event handler is below (it is of no use, really):

 void scale_moved (Gtk.Range range)
 {
 int i;
 Gtk.TextIter iter = new Gtk. TextIter();
 view.get_iter_at_position(out iter, out i, 0, 0);
 iter.set_line(iter.get_line() + 10);
 view.scroll_to_iter(iter, 0, false, 0, 0);
 }

-- 
Thanks & Regards,
Manish Jain
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Re: [Vala] Package `Gee-0.8' not found

[Al Thomas via vala-list]

 
   > On Thursday, 25 January 2018, 16:41:31 GMT, Ralf Ganswindt 
 wrote:  
 > I'm experimenting with Vala and so far I like how it works. However, I
> tried to compile a basic gee example from the sample programs and I get the
> following:

> $ valac --pkg Gee-0.8 list.vala
> error: Package `Gee-0.8' not found in specified Vala API directories or

It should be --pkg gee-0.8 It is case sensitive!
You also need the development files installed. For Ubuntu that would be 
something likeapt install libgee-dev

> GIR files:
You want to avoid GIR files to start with. They are GObject Introspection 
Repository (GIR)files that contain enough information about a C library's 
interface to generate bindings forvarious languages, including Vala. The Vala 
tool vapigen can then be used to generate aVala Application Programming 
Interface (VAPI) file from the GIR. valac can do this automaticallyif a VAPI is 
not found.
By using the capitalized version, --pkg Gee-0.8, valac tried to generate the 
VAPI for you by
searching for the relevant GIR. It looks like that wasn't found either, 
probably because youdon't have the development files installed. If you look at 
the files in the dev package youshould see the difference in filenames.

When starting out you want to focus on using VAPI files for interfacing with 
libraries.
All the best,
Al
  
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[Vala] Package `Gee-0.8' not found

[Ralf Ganswindt]

I'm experimenting with Vala and so far I like how it works. However, I
tried to compile a basic gee example from the sample programs and I get the
following:

$ valac --pkg Gee-0.8 list.vala
error: Package `Gee-0.8' not found in specified Vala API directories or
GObject-Introspection GIR directories
Compilation failed: 1 error(s), 0 warning(s)

A search of /usr/... reveals no gir or vapi files for Gee-0.8, only
gir1.2-gee-0.8 and libgee-0.8 related files and binaries.

I have attempted to manually install the files using the synaptic package
manager and it didn't throw any exceptions.

$ apt show -a gir1.2-gee-0.8
Package: gir1.2-gee-0.8
Version: 0.20.0-0ubuntu1~16.04~valateam0
Priority: optional
Section: introspection
Source: libgee-0.8
Maintainer: Ubuntu Developers 
Original-Maintainer: Maintainers of Vala packages <
pkg-vala-maintain...@lists.alioth.debian.org>
Installed-Size: 99.3 kB
Depends: gir1.2-glib-2.0, libgirepository-1.0-1 (>= 1.41.4-1)
Download-Size: 21.8 kB
APT-Manual-Installed: yes
APT-Sources: http://ppa.launchpad.net/vala-team/ppa/ubuntu xenial/main
amd64 Packages
Description: GObject based collection and utility library
(GObject-Introspection)
 This package contains introspection data for libgee, which can be used
 to generate dynamic bindings.
 .
 libgee is a collection and utility library providing GObject-based
 interfaces and classes for commonly used data structures.

Package: gir1.2-gee-0.8
Version: 0.18.0-1
Priority: optional
Section: introspection
Source: libgee-0.8
Origin: Ubuntu
Maintainer: Ubuntu Developers 
Original-Maintainer: Maintainers of Vala packages <
pkg-vala-maintain...@lists.alioth.debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 137 kB
Depends: gir1.2-glib-2.0, libgirepository-1.0-1 (>= 1.41.4-1)
Homepage: https://wiki.gnome.org/Projects/Libgee
Task: ubuntu-touch-core, ubuntu-touch, ubuntu-sdk
Supported: 9m
Download-Size: 22.5 kB
APT-Sources: http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
Description: GObject based collection and utility library
(GObject-Introspection)
 This package contains introspection data for libgee, which can be used
 to generate dynamic bindings.
 .
 libgee is a collection and utility library providing GObject-based
 interfaces and classes for commonly used data structures.

GIR files:

$ ls -R /usr/share/gir*
/usr/share/gir-1.0:
Atk-1.0.gir Gdk-3.0.gir   GModule-2.0.gir
PangoCairo-1.0.gir
Atspi-2.0.gir   GdkPixbuf-2.0.gir GObject-2.0.gir
PangoFT2-1.0.gir
cairo-1.0.gir   GdkX11-2.0.girGtk-2.0.gir
PangoXft-1.0.gir
DBus-1.0.girGdkX11-3.0.girGtk-3.0.girwin32-1.0.gir
DBusGLib-1.0.girGio-2.0.gir   GtkSource-3.0.gir  xfixes-4.0.gir
fontconfig-2.0.gir  GIRepository-2.0.gir  HarfBuzz-0.0.gir   xft-2.0.gir
freetype2-2.0.gir   GL-1.0.girlibxml2-2.0.girxlib-2.0.gir
Gdk-2.0.gir GLib-2.0.gir  Pango-1.0.gir  xrandr-1.3.gir

What am I missing? Before I try to back engineer myself into a disaster.

Thanks,

Ralf Ganswindt
ralfganswi...@gmail.com
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Re: [Vala] Confusing issue with static struct method: too many arguments to function

[Abderrahim Kitouni]

Hello,

On Mon, 22 Jan 2018, 23:00 Michael Murphy,  wrote:

> I have the following which is automatically generated by bindgen.
>
> ```c
> DistinstSector distinst_sector_megabyte(uint64_t value);
> ```
>

If the struct is returned (and passed as a parameter) like this in C, it
should be a simple type in vala. The annotation is  [SimpleType]

HTH,

Abderrahim
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Re: [Vala] compiler warning for Variant.strv()

[Al Thomas via vala-list]

> On Thursday, 25 January 2018, 10:32:07 GMT, Yasushi SHOJI 
 wrote:  
> void main () {
>         Variant ary = new Variant.strv({"foo", "bar", "baz"});
> }


> /usr/include/glib-2.0/glib/gvariant.h:118:33: note: expected ‘const
> gchar * const* {aka const char * const*}’ but argument is of type
> ‘gchar ** {aka char **}’
> GVariant *                      g_variant_new_strv
>  (const gchar * const  *strv,
>                                ^~

Vala does have implicit conversion for Variant types, e.g.:
Variant a = "a string";Variant b = 10;
I've not figure out how well this works with collections, but there is this 
patch:https://mail.gnome.org/archives/commits-list/2010-October/msg08428.html

I've tried: Variant test = {"foo", "bar", "bax"};but get "error: initializer 
list used for `GLib.Variant?', which is neither array nor struct"
I also tried explicit casting:string[] test = {"foo", "bar", "baz"};
Variant result = (Variant) test;
This compiles without C warnings, but I get a runtime critical from 
GLib:GLib-CRITICAL **: g_variant_ref: assertion 'value->ref_count > 0' failed
So it looks like some development is needed in that area, if someone wants to 
take up the challenge!
Al






  
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Re: [Vala] Newbie help requested for scrolling a TextView

[Manish Jain]

On 01/25/18 16:11, Al Thomas wrote:
> On Thursday, 25 January 2018, 01:00:05 GMT, Manish Jain 
 wrote:


> Despite a lot of effort to write an event handler, I still cannot get
> the scale to tell the view to scroll. I have tried scrolling with the
> scroll_to_iter() method, but the iterator always lands me at the top of
> the file, whereas I want the view to move south.

Have you tried moving the TextIter with something like:
https://valadoc.org/gtk+-3.0/Gtk.TextIter.set_line.html

It sounds like you want a TextIter instance for your vscale widget 
that you can then move

about the document and then scroll to it.

It may be your almost there, just missing the last piece of the puzzle!

Regards,

Al


Hi Al/others,

The scrolling is beginning to happen, but not in the way I would expect.

Here is my event handler for the scale (which I am using a normal
command widget) :

    void scale_moved (Gtk.Range range)
    {
    TextIter iter = TextIter();

    view.get_iter_at_location(out iter, 0, ypos);
    view.scroll_to_iter(iter, 0, false, 0, 0);
    view.place_cursor_onscreen();
    ypos++;
    }

The ypos counter is initialized as 0, and then gets incremented
each time the scale is used. Effectively, each time the uses clicks
the scale, the view should move south one line. That is the behaviour
I would expect.

But the scrolling is almost negligible unless I jack up ypos argument
to get_iter_at_location() as 25*ypos - at which point the view moves
south sometimes one line or sometimes two lines.

I must be missing something: is the view scrolling somehow dependent
on window geometry and/or line lengths ? I would normally think the
ypos argument is just the number of newlines (minus one) to be skipped
when readjusting the view.

Thanks for any help.
Manish Jain
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Re: [Vala] Newbie help requested for scrolling a TextView

[Al Thomas via vala-list]

  > On Thursday, 25 January 2018, 11:37:49 GMT, Manish Jain 
 wrote: > I was filling up the view> with text += . And I think Vala> removes the trailing 
newline, so essentially my buffer always had> just one line! 
By using += with the text property of the buffer you are re-writing the 
wholebuffer on each change. You should probably be looking at one of the 
insertfunctions of Gtk.TextBuffer.
I doubt Vala is removing trailing newlines unless you are telling your program 
to, even if unintentionally! Your Vala program is using library functions so 
lookcarefully at these library functions' documentation and what they are 
returning.

 > At runtime, both textview and scale occupy 50% of the grid's> real-estate. 
 > Can I tell the grid to give 75% coverage to the view> and 25% to the scale, 
 > or is there some way I can size the widgets> myself from within my code?

You would want a 4 column grid and to make the width of the view3 and the width 
of the scale 1. A nice example 
(Python):http://python-gtk-3-tutorial.readthedocs.io/en/latest/layout.html#id1

Regards,

Al
  
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Re: [Vala] Newbie help requested for scrolling a TextView

[Manish Jain]

Hi Al,


Tx for replying. As part of my teething struggles, I discovered

what I think was essentially wrong. I was filling up the view

with text += . And I think Vala

removes the trailing newline, so essentially my buffer always had

just one line!


Let me see if I can get my code to work now.


There is another woe that afflicts me. I am adding both widgets

(TextView - embedded in ScrolledWindow - and a vertical scale at RHS) to

a grid. At runtime, both textview and scale occupy 50% of the grid's

real-estate. Can I tell the grid to give 75% coverage to the view

and 25% to the scale, or is there some way I can size the widgets

myself from within my code?


Thanks again.

Manish Jain



On 01/25/18 16:11, Al Thomas wrote:
> On Thursday, 25 January 2018, 01:00:05 GMT, Manish Jain 
 wrote:


> Despite a lot of effort to write an event handler, I still cannot get
> the scale to tell the view to scroll. I have tried scrolling with the
> scroll_to_iter() method, but the iterator always lands me at the top of
> the file, whereas I want the view to move south.

Have you tried moving the TextIter with something like:
https://valadoc.org/gtk+-3.0/Gtk.TextIter.set_line.html

It sounds like you want a TextIter instance for your vscale widget 
that you can then move

about the document and then scroll to it.

It may be your almost there, just missing the last piece of the puzzle!

Regards,

Al


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Re: [Vala] compiler warning for Variant.strv()

[Al Thomas via vala-list]

> On Thursday, 25 January 2018, 11:19:44 GMT, Abderrahim Kitouni 
>  wrote: 
> You can try to use the latest development version of Vala. Most of those
> warnings should go away.

Unfortunately that isn't fixed in this case.
The g_variant_new_strv has a C type signature for the array of strings as:const 
gchar * const *strv
See 
https://developer.gnome.org/glib/stable/glib-GVariant.html#g-variant-new-strv
and Vala is generating the type as gchar**. Still two levels of indirection, 
but not similarenough for the compiler. I'm not aware of a way of explicitly 
setting the C type of an array in a Vala binding. The "Legacy Bindings" 
document references array lengthsa lot, but not the type of array:
https://wiki.gnome.org/Projects/Vala/LegacyBindings


On Thu, 25 Jan 2018, 11:32 Yasushi SHOJI,  wrote:

> Is there anyway to fix this except "-Wno-incompatible-pointer-types"?
>
>
> $ cat a.vala
> using Gee;
>
> void main () {
>        Variant ary = new Variant.strv({"foo", "bar", "baz"});
> }
>
>
> $ valac --pkg gee-0.8 a.vala --no-color
> a.vala:4.11-4.55: warning: local variable `ary' declared but never used
>        Variant ary = new Variant.strv({"foo", "bar", "baz"});
>                ^
> /tmp/a.vala.c: In function ‘_vala_main’:
> /tmp/a.vala.c:38:31: warning: passing argument 1 of
> ‘g_variant_new_strv’ from incompatible pointer type
> [-Wincompatible-pointer-types]
>  _tmp5_ = g_variant_new_strv (_tmp4_, 3);
>                                ^~
> In file included from /usr/include/glib-2.0/glib/gmessages.h:35:0,
>                  from /usr/include/glib-2.0/glib.h:62,
>                  from /tmp/a.vala.c:5:
> /usr/include/glib-2.0/glib/gvariant.h:118:33: note: expected ‘const
> gchar * const* {aka const char * const*}’ but argument is of type
> ‘gchar ** {aka char **}’
>  GVariant *                      g_variant_new_strv
>  (const gchar * const  *strv,
>                                  ^~
> Compilation succeeded - 1 warning(s)
> --

  
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Re: [Vala] compiler warning for Variant.strv()

[Abderrahim Kitouni]

Hello,

You can try to use the latest development version of Vala. Most of those
warnings should go away.

https://blogs.gnome.org/despinosa/2018/01/09/vala-warnings-output-improvements/

HTH,

Abderrahim

On Thu, 25 Jan 2018, 11:32 Yasushi SHOJI,  wrote:

> Hi,
>
> I have a code snippet which gets incompatible pointer type warning
> from gcc.
>
> Is there anyway to fix this except "-Wno-incompatible-pointer-types"?
>
>
> $ cat a.vala
> using Gee;
>
> void main () {
> Variant ary = new Variant.strv({"foo", "bar", "baz"});
> }
>
>
> $ valac --pkg gee-0.8 a.vala --no-color
> a.vala:4.11-4.55: warning: local variable `ary' declared but never used
> Variant ary = new Variant.strv({"foo", "bar", "baz"});
> ^
> /tmp/a.vala.c: In function ‘_vala_main’:
> /tmp/a.vala.c:38:31: warning: passing argument 1 of
> ‘g_variant_new_strv’ from incompatible pointer type
> [-Wincompatible-pointer-types]
>   _tmp5_ = g_variant_new_strv (_tmp4_, 3);
>^~
> In file included from /usr/include/glib-2.0/glib/gmessages.h:35:0,
>  from /usr/include/glib-2.0/glib.h:62,
>  from /tmp/a.vala.c:5:
> /usr/include/glib-2.0/glib/gvariant.h:118:33: note: expected ‘const
> gchar * const* {aka const char * const*}’ but argument is of type
> ‘gchar ** {aka char **}’
>  GVariant *  g_variant_new_strv
>   (const gchar * const  *strv,
>  ^~
> Compilation succeeded - 1 warning(s)
> --
>   yashi
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Re: [Vala] Newbie help requested for scrolling a TextView

[Al Thomas via vala-list]

   > On Thursday, 25 January 2018, 01:00:05 GMT, Manish Jain 
 wrote: 
> Despite a lot of effort to write an event handler, I still cannot get > the 
> scale to tell the view to scroll. I have tried scrolling with the
> scroll_to_iter() method, but the iterator always lands me at the top of 
> the file, whereas I want the view to move south.

Have you tried moving the TextIter with something 
like:https://valadoc.org/gtk+-3.0/Gtk.TextIter.set_line.html

It sounds like you want a TextIter instance for your vscale widget that you can 
then moveabout the document and then scroll to it.
It may be your almost there, just missing the last piece of the puzzle!
Regards,
Al
  
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[Vala] compiler warning for Variant.strv()

[Yasushi SHOJI]

Hi,

I have a code snippet which gets incompatible pointer type warning
from gcc.

Is there anyway to fix this except "-Wno-incompatible-pointer-types"?


$ cat a.vala
using Gee;

void main () {
Variant ary = new Variant.strv({"foo", "bar", "baz"});
}


$ valac --pkg gee-0.8 a.vala --no-color
a.vala:4.11-4.55: warning: local variable `ary' declared but never used
Variant ary = new Variant.strv({"foo", "bar", "baz"});
^
/tmp/a.vala.c: In function ‘_vala_main’:
/tmp/a.vala.c:38:31: warning: passing argument 1 of
‘g_variant_new_strv’ from incompatible pointer type
[-Wincompatible-pointer-types]
  _tmp5_ = g_variant_new_strv (_tmp4_, 3);
   ^~
In file included from /usr/include/glib-2.0/glib/gmessages.h:35:0,
 from /usr/include/glib-2.0/glib.h:62,
 from /tmp/a.vala.c:5:
/usr/include/glib-2.0/glib/gvariant.h:118:33: note: expected ‘const
gchar * const* {aka const char * const*}’ but argument is of type
‘gchar ** {aka char **}’
 GVariant *  g_variant_new_strv
  (const gchar * const  *strv,
 ^~
Compilation succeeded - 1 warning(s)
-- 
  yashi
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