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| WITH Gtk.Main ; USE Gtk.Main ;
WITH Gtk.Window ; USE Gtk.Window ;
WITH Gtk.Enums ; USE Gtk.Enums ;
WITH Gtk.Widget ; USE Gtk.Widget ;
with Gtk.Handlers;
WITH Gtk.Drawing_Area; USE Gtk.Drawing_Area;
WITH Cairo ; USE Cairo ;
WITH Gdk.Color ; USE Gdk.Color ;
WITH Gdk.Cairo ; USE Gdk.Cairo ;
WITH Gtk.Style ; USE Gtk.Style ;
WITH Glib ; USE Glib ;
WITH Gdk.Event ; USE Gdk.Event ;
WITH Gdk.Rectangle ; USE Gdk.Rectangle ;
WITH Gdk ; USE Gdk ;
PROCEDURE dessine_avec_cairo IS
-----------------------
-- VARIABLES -- |
----------------------------------------------------------
win : Gtk_window ;
zone_dessin : Gtk_Drawing_Area ;
----------------------------------------------------------
--Instanciation package(s) for connexion
----------------------------------------------------------
PACKAGE P_Callback IS NEW Gtk.Handlers.Callback(Gtk_Widget_Record);
USE P_Callback ;
PACKAGE Configured IS NEW Gtk.Handlers.Return_Callback
(Widget_Type => Gtk_Drawing_Area_Record,
Return_Type => Boolean);
----------------------------------------------------------
-- Handlers (or callbacks) |
----------------------------------------------------------
procedure Stop_Program(Emetteur : access Gtk_Widget_Record'class)
is
PRAGMA Unreferenced (Emetteur);
begin
Main_Quit;
end Stop_Program ;
function Expose_Event
(the_Widget : access Gtk_Drawing_Area_Record'Class;
Event : Gdk.Event.Gdk_Event )
return Boolean
is
Area : Gdk_Rectangle := Get_Area (Event);
Region : Gdk_Rectangle;
Context : Cairo_Context ;
Win2 : Gdk_Window ;
drawable : Gdk_Drawable ;
begin
Win2 := Get_Window (Widget => the_Widget) ;
drawable := Gdk_Drawable (Win2) ;-- transtypage
Context := Create ( drawable ) ;
Region.Width := Area.Width / 2;
Region.Height := Area.Height / 2;
Region.X := Region.Width / 2;
Region.Y := Region.Height / 2;
Set_Source_Rgb(Context, 1.0, 0.0, 0.0);
Cairo.Rectangle(Cr => Context, X => GDouble(Region.X), Y => GDouble(Region.Y), Width => GDouble(Region.Width), Height => GDouble(Region.Height));
Cairo.Fill_Preserve(Context);
Set_Line_Width(Context, 1.0);
Set_Source_Rgb(Context, 0.0, 0.0, 1.0);
Cairo.Stroke(Context);
return false ;
end expose_event;
-------------------------------------------------
BEGIN
Init ;
----------------
-- NEW -- |
-------------------------------------------------
Gtk_New(zone_dessin);
Gtk_New(win);
---------------------------------
-- Add |
---------------------------------
win.Add( zone_dessin );
------------------------------------------
-- Connect |
------------------------------------------
Connect(Widget => win ,
Name => "destroy" ,
Cb => Stop_Program'access);
Configured.Connect (Widget => zone_dessin,
Name => "expose_event",
Marsh => Configured.To_Marshaller
(Expose_Event'Access));
------------------------------------------
-- Design Window |
------------------------------------------
Size
(Drawing_Area => zone_dessin ,
Width => 100 ,
Height => 100 );
Size_Allocate
(Widget => zone_dessin ,
Allocation => ( X => 0 , Y => 0 , Width => 10 , Height => 10 ) ) ;
win.Set_Default_Size(600,500) ;
win.set_position(Win_Pos_Center) ;
win.set_opacity(0.7) ;
win.Show_all ;
Main ;
END dessine_avec_cairo ; |
