* Pango in GtkAda Gtk version 3
@ 2014-01-31 9:27 ldries46
2014-01-31 10:24 ` Dmitry A. Kazakov
0 siblings, 1 reply; 4+ messages in thread
From: ldries46 @ 2014-01-31 9:27 UTC (permalink / raw)
Is their an equivalent of the "Hello World" program for using 'Pango' within
a drawing area.
If so where can I find it?
I need it to learn using Pango within a program
L. Dries
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Pango in GtkAda Gtk version 3
2014-01-31 9:27 Pango in GtkAda Gtk version 3 ldries46
@ 2014-01-31 10:24 ` Dmitry A. Kazakov
2014-01-31 14:09 ` ldries46
0 siblings, 1 reply; 4+ messages in thread
From: Dmitry A. Kazakov @ 2014-01-31 10:24 UTC (permalink / raw)
On Fri, 31 Jan 2014 10:27:19 +0100, ldries46 wrote:
> Is their an equivalent of the "Hello World" program for using 'Pango' within
> a drawing area.
> If so where can I find it?
Nowhere. GTK+ 3.x does not have drawing area anymore.
> I need it to learn using Pango within a program
To use a Pango font with Cairo, you should:
1. create a Pango_Layout on the given context (Create_Layout);
2. set Pango font there (Set_Font_Description);
3. set text to render into the layout (Set_Text);
4. draw the layout (Show_Layout_Line).
For further information see:
https://developer.gnome.org/pango/unstable/pango-Cairo-Rendering.html
Examples of use with GtkAda are here (require some adjustments for GTK
3.x).
http://www.dmitry-kazakov.de/ada/aicwl.htm
Since Pango fonts and Toy fonts are considerably different in their use,
the library has an abstraction layer in order to be able to use both.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Pango in GtkAda Gtk version 3
2014-01-31 10:24 ` Dmitry A. Kazakov
@ 2014-01-31 14:09 ` ldries46
2014-01-31 18:40 ` Dmitry A. Kazakov
0 siblings, 1 reply; 4+ messages in thread
From: ldries46 @ 2014-01-31 14:09 UTC (permalink / raw)
After a while searching I could not find the procedure or function
Create_Layout. Finally I just found Show_Layout which shows a Layout in a
CR.
procedure Show_Layout (Cr : Cairo_Context; Layout : Pango_Layout);
>To use a Pango font with Cairo, you should:
>1. create a Pango_Layout on the given context (Create_Layout);
>2. set Pango font there (Set_Font_Description);
>3. set text to render into the layout (Set_Text);
>4. draw the layout (Show_Layout_Line).
>Nowhere. GTK+ 3.x does not have drawing area anymore.
May be not but why is it then possible in Glade 3.14.2 to create one and you
can write lines in it.
L. Dries
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Pango in GtkAda Gtk version 3
2014-01-31 14:09 ` ldries46
@ 2014-01-31 18:40 ` Dmitry A. Kazakov
0 siblings, 0 replies; 4+ messages in thread
From: Dmitry A. Kazakov @ 2014-01-31 18:40 UTC (permalink / raw)
On Fri, 31 Jan 2014 15:09:25 +0100, ldries46 wrote:
> After a while searching I could not find the procedure or function
> Create_Layout.
I guess it is missing in GtkAda 3.4. Use this until AdaCore fixes that:
function Create_Layout (Context : Cairo_Context)
return Pango_Layout is
function Internal (Context : Cairo_Context) return Address;
pragma Import (C, Internal, "pango_cairo_create_layout");
Stub : Pango_Layout_Record;
begin
return Pango_Layout (Get_User_Data (Internal (Context), Stub));
end Create_Layout;
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
^ permalink raw reply [flat|nested] 4+ messages in thread
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2014-01-31 9:27 Pango in GtkAda Gtk version 3 ldries46
2014-01-31 10:24 ` Dmitry A. Kazakov
2014-01-31 14:09 ` ldries46
2014-01-31 18:40 ` Dmitry A. Kazakov
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