New Widgetset

[x2nie]

Hi gurus !


I am looking for a step-by-step / tutorial of how to implement a widgetset as LCL interface.
Is there a link / explanation of it?
I've read the Lazarus code, I still don't know where I could start from.


Any pointer / advice would be appreciated.

[x2nie]

okay, I have better keyword for search-engine's feed.
I found one:
http://wiki.lazarus.freepascal.org/LCL_Internals#How_to_create_a_new_Widgetset

[JuhaManninen]

okay, I have better keyword for search-engine's feed.
I found one:
http://wiki.lazarus.freepascal.org/LCL_Internals#How_to_create_a_new_Widgetset

Good luck

Zeljan has made bindings also for GTK3. It works somehow but is still in alpha state.
If you need practice with widgetsets, please consider improving it. Building Lazarus IDE using GTK3 would be a nice goal.

[valdir.marcos]

See more information here:
http://forum.lazarus.freepascal.org/index.php/topic,23609.msg141128.html#msg141128

[zeljko]

Good luck

Zeljan has made bindings also for GTK3. It works somehow but is still in alpha state.
If you need practice with widgetsets, please consider improving it. Building Lazarus IDE using GTK3 would be a nice goal.

Well IDE builds with gtk3 and it even start

[Blaazen]

When I try to run an empty project with GTk3 it always stop me in unit LazGObject2 at line 63:

Code: [Select]

G_PARAM_DEPRECATED: TGParamFlags = 2147483648;and when I comment it then it gives SIGSEGV in gtk3object.inc at

Code: [Select]

procedure TGtk3WidgetSet.SetDefaultAppFontName;
var
  AValue: TGValue;
begin
  AValue.init(G_TYPE_STRING);  //<--- HERE
  g_object_get_property(gtk_settings_get_default, 'gtk-font-name', @AValue);
  FDefaultAppFontName := AValue.get_string;
  AValue.unset;
end;I've installed GTk3 libraries from repositories.

[x2nie]

See more information here:
http://forum.lazarus.freepascal.org/index.php/topic,23609.msg141128.html#msg141128

Nice, there are many link to same topic too. !

Zeljan has made bindings also for GTK3. It works somehow but is still in alpha state.
If you need practice with widgetsets, please consider improving it. Building Lazarus IDE using GTK3 would be a nice goal.

I wonder, is it possible to deploy an GTK3 application without building lazarus to GTK3 ?
I heard there was a cross-compile to do so, but this one is a mystery for me.

I can not found in Project Option about changing to specific widgetset.
How can we change the target widgetset of current active project when Lazarus is built in onther widgetset?
 

[x2nie]

When I try to run an empty project with GTk3 ...
I've installed GTk3 libraries from repositories.

I can not found download link for "G.T.K.3".
I went to http://www.gtk.org/download/index.php
and only GTK+ download available.
Is GTK+ = GTK3 ?

[Blaazen]

Your distro havn't got anything in repositories?

Is GTK+ = GTK3 ?

Just follow the links on that page. There are GTK+ versions 1.2 (old GTK), then 2.4 up to 2.24 (GTK2) and GTK 3. up to 3.10 (GTK3).

[zeljko]

I wonder, is it possible to deploy an GTK3 application without building lazarus to GTK3 ?
I heard there was a cross-compile to do so, but this one is a mystery for me.

I can not found in Project Option about changing to specific widgetset.
How can we change the target widgetset of current active project when Lazarus is built in onther widgetset?
 

You mean is it possible to build eg. gtk2 application with lazarus qt ide ? Of course it is. That's main feature of lazarus
Yes, you can deploy your application whenever it works (arhitecture is ok and you have all needed libraries installed).

[zeljko]

When I try to run an empty project with GTk3 it always stop me in unit LazGObject2 at line 63:

Code: [Select]

G_PARAM_DEPRECATED: TGParamFlags = 2147483648;and when I comment it then it gives SIGSEGV in gtk3object.inc at

Code: [Select]

procedure TGtk3WidgetSet.SetDefaultAppFontName;
var
  AValue: TGValue;
begin
  AValue.init(G_TYPE_STRING);  //<--- HERE
  g_object_get_property(gtk_settings_get_default, 'gtk-font-name', @AValue);
  FDefaultAppFontName := AValue.get_string;
  AValue.unset;
end;I've installed GTk3 libraries from repositories.

Version of gtk3,glib2,cairo and pango libs is very important.

[Blaazen]

I have (all from repos):
GTK 3.10.7.-2
Pango 1.36.2-1
Cairo 1.12.16-2
glib2 2.38.2-1

[JuhaManninen]

I heard there was a cross-compile to do so, but this one is a mystery for me.

Cross-compilation is needed only when targeting another CPU and/or OS, not when selecting a different widgetset.

I can not found in Project Option about changing to specific widgetset.
How can we change the target widgetset of current active project when Lazarus is built in onther widgetset?

Project Option  -> Additions and Overrides -> Add -> Set "LCLWidgetType". Select GTK3.

[x2nie]

I can not found in Project Option about changing to specific widgetset. How can we change the target widgetset of current active project when Lazarus is built in onther widgetset?  

You mean is it possible to build eg. gtk2 application with lazarus qt ide ? Of course it is. That's main feature of lazarus
Yes, you can deploy your application whenever it works (arhitecture is ok and you have all needed libraries installed).

Project Option  -> Additions and Overrides -> Add -> Set "LCLWidgetType". Select GTK3.

Horay! I can't believe that finally I can do it (cross-widget-compile).


Anyway, the "Add - Set LCLWIdgetType" is not searchable !
We can NOT found it by typing "Widget" in Project-Option's SearchBox.

edit: add atachment

[zeljko]

I have (all from repos):
GTK 3.10.7.-2
Pango 1.36.2-1
Cairo 1.12.16-2
glib2 2.38.2-1

Fedora 19 64bit - everything ok, simple app works w/o problem.
gtk3-3.8.8-2.fc19.x86_64
pango-1.34.1-3.fc19.x86_64
cairo-1.12.14-2.fc19.x86_64
glib2-2.36.4-1.fc19.x86_64