Using Cairo with GTK
dead-crow opened this issue · 5 comments
Hi ,
I'm trying to code geometric forms with cairo and display with a gtk_window .
I created the window and a gtk_drawing_area in it .
Maybe , now the "draw" signal is needed ?
If yes , i have no idea of how to use it .
I read carefully descriptions in packages , but it doesn't help me .
WITH Gtk.Main ; USE Gtk.Main ;
WITH Gtk.Window ; USE Gtk.Window ;
WITH Gtk.Enums ; USE Gtk.Enums ;
WITH Gtk.Button ; USE Gtk.Button ;
WITH Gtk.Alignment ; USE Gtk.Alignment ;
WITH Gtk.Box ; USE Gtk.Box ;
WITH Gtk.Gentry; USE Gtk.Gentry;
WITH Gtk.Widget ; USE Gtk.Widget ;
with Gtk.Handlers;
with Gtk.Drawing_Area; use Gtk.Drawing_Area;
PROCEDURE dessine_avec_cairo IS
-----------------------
-- VARIABLES -- |
----------------------------------------------------------
win : Gtk_window ;
Btn1, Btn2 ,Btn3 : Gtk_Button ;
alignG, alignM ,alignD : Gtk_Alignment ;
Boite : Gtk_VBox ;
Boutons : Gtk_HBox ;
saisie : Gtk_Entry ;
zone_dessin : Gtk_Drawing_Area ;
----------------------------------------------------------
--Instanciation package(s) for connexion
----------------------------------------------------------
PACKAGE P_Callback IS NEW Gtk.Handlers.Callback(Gtk_Widget_Record);
USE P_Callback ;
----------------------------------------------------------
-- Handlers (or callbacks) |
----------------------------------------------------------
procedure Stop_Program(Emetteur : access Gtk_Widget_Record'class)
is
PRAGMA Unreferenced (Emetteur);
begin
Main_Quit;
end Stop_Program ;
-------------------------------------------------
BEGIN
Init ;
----------------
-- NEW -- |
-------------------------------------------------
Gtk_New(zone_dessin);
Gtk_New(win);
Gtk_New(saisie);
Gtk_New(Btn1, "Bouton 1") ;
Gtk_New(Btn2, "Bouton 2") ;
Gtk_New(Btn3, "Bouton 3") ;
Gtk_New(alignG,0.0,1.0,1.0,1.0);
Gtk_New(alignM,0.5,1.0,1.0,1.0);
Gtk_New(alignD,1.0,1.0,1.0,1.0);
Gtk_New_VBox
(Boite, homogeneous => false, Spacing => 0) ;
Gtk_New_HBox
(Boutons, homogeneous => false, Spacing => 0) ;
---------------------------------
-- Add |
---------------------------------
alignG.add(Btn1) ;
alignM.add(Btn2) ;
alignD.add(Btn3) ;
win.Add(Boite);
------------------------------------------
-- Connect |
------------------------------------------
Connect(Widget => win ,
Name => "destroy" ,
Cb => Stop_Program'access);
------------------------------------------
-- Design Window |
------------------------------------------
Size
(Drawing_Area => zone_dessin ,
Width => 100 ,
Height => 100);
Pack_Start
(In_Box => Boite ,
Child => zone_dessin ,
Expand => true ,
Fill => true );
Pack_Start
(In_Box => Boite ,
Child => saisie ,
Expand => false );
Pack_Start
(In_Box => Boite ,
Child => Boutons ,
Expand => true ,
Fill => true );
Pack_Start
(In_Box => Boutons ,
Child => alignG ,
Expand => true ,
Fill => true );
Pack_Start
(In_Box => Boutons ,
Child => alignM ,
Expand => true ,
Fill => true );
Pack_Start
(In_Box => Boutons ,
Child => alignD ,
Expand => true ,
Fill => true );
win.Set_Default_Size(500,500) ;
win.set_position(Win_Pos_Mouse) ;
win.set_opacity(0.7) ;
win.Show_all ;
Main ;
END dessine_avec_cairo ;still up to date
This forum is more intended for the developers of GtkAda than the actual users. Your question is actually a gtk+ / gdk / cairo question, you will probably have more luck on the user's forums for the libraries directly.
Thanks for your answer setton .
I already created a topic on a GTK forum .
But because it's specific to this ADA binding , i got no answer .
Plus , i think that there is minimum one person here who can help me about it .
I saw your question on that GTK forum.
Opening issues on GtkAda is used to inform the GtkAda team of a bug in their code. If you need help on how to use some software components, you need to ask your question at the right place. Try asking on http://www.stackoverflow.com and tagging your question with the proper gtk and ada tags, I'm sure you'll have better chances of someone replying.