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  • Committer: Bazaar Package Importer
  • Author(s): Torsten Werner
  • Date: 2007-01-27 20:08:50 UTC
  • mfrom: (1.2.3 upstream)
  • Revision ID: james.westby@ubuntu.com-20070127200850-9mrptaqqjsx9nwa7
Tags: 2.0.4-5
* Fixed Build-Depends.
* Add myself to Uploaders in debian/control.
* Make sure that the sources are really patched before building them.
* Build unit 'libc' on powerpc too.

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fpcdocs/gtk5ex/graphics.pp
 
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program graphics;
 
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{$mode objfpc}
 
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{$h+}
 
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uses glib,gdk,gtk,sysutils;
 
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var
 
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  window,
 
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  area : PGtkWidget;
 
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Function close_application( widget : PGtkWidget ;
 
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                        event : PGdkEvent;
 
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                        data : gpointer) : boolean; cdecl;
 
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Begin
 
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  gtk_main_quit();
 
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  close_application := false;
 
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End;
 
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Function AllocateColor(R,G,B : Integer; Widget : PGtkWidget) : PGdkColor;
 
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begin
 
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  Result:=New(PgdkColor);
 
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  With Result^ do
 
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    begin
 
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    Pixel:=0;
 
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    Red:=R;
 
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    Blue:=B;
 
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    Green:=G;
 
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    end;
 
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  gdk_colormap_alloc_color(gtk_widget_get_colormap(Widget),Result,true,False);
 
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end;
 
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function Exposed(Widget: PGtkWidget;event : PGdkEventExpose; Data : gpointer) : Integer; cdecl;
 
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Const
 
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  Triangle : Array[1..4] of TgdkPoint =
 
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            ((X:10;Y:195),(X:110;Y:195),(X:55;Y:145),(X:10;Y:195));
 
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  LineStyles : Array[1..5] of TgdkLineStyle =
 
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          (GDK_LINE_SOLID, GDK_LINE_ON_OFF_DASH, GDK_LINE_DOUBLE_DASH,
 
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          GDK_LINE_ON_OFF_DASH, GDK_LINE_SOLID);
 
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  capstyles : Array[1..5] of TgdkCapStyle =
 
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          (GDK_CAP_ROUND,GDK_CAP_NOT_LAST, GDK_CAP_BUTT,  GDK_CAP_PROJECTING,
 
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          GDK_CAP_NOT_LAST);
 
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  FontName : Pchar =
 
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   '-*-helvetica-bold-r-normal--*-120-*-*-*-*-iso8859-1';
 
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Var
 
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  SegTriangle : Array[1..3] of TgdkSegment;
 
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  Win : pgdkWindow;
 
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  gc : PgdkGC;
 
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  i,seg : Integer;
 
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  font : PgdkFont;
 
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  Angle1,Angle2 : Longint;
 
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begin
 
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  gc:=gdk_gc_new(widget^.Window);
 
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  Win:=widget^.window;
 
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  With Event^.area do
 
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    gdk_window_clear_area (win,x,y,width,height);
 
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  gdk_gc_set_foreground(gc,allocatecolor(0,0,0,Widget));
 
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  gdk_draw_rectangle(win,gc,0,5,5,590,390);
 
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//  gdk_draw_rectangle(win,gc,-1,15,15,570,370);
 
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  gdk_gc_set_foreground(gc,allocatecolor(0,0,$ffff,Widget));
 
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  for I:=10 to 50 do
 
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    gdk_draw_point(win,gc,I*10,100);
 
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  gdk_gc_set_foreground(gc,allocatecolor($ffff,0,0,Widget));
 
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  for I:=10 to 50 do
 
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    begin
 
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    gdk_gc_set_line_attributes(gc,6,LineStyles[i div 10],CapStyles[i div 10],GDK_JOIN_MITER);
 
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    gdk_draw_line(win,gc,I*10,20,I*10,90)
 
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    end;
 
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  gdk_gc_set_line_attributes(gc,1,GDK_LINE_SOLID,GDK_CAP_BUTT,GDK_JOIN_MITER);
 
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  gdk_gc_set_foreground(gc,allocatecolor($ffff,0,$ffff,Widget));
 
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  seg:=(360 div 20) * 64;
 
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  For I:=1 to 20 do
 
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    gdk_draw_arc(win,gc,0,220-I*4,200-i*4,8*i,8*i,i*seg,seg*19);
 
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  For I:=1 to 20 do
 
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    gdk_draw_arc(win,gc,-1,380-I*4,200-i*4,8*i,8*i,(i-1)*seg,seg);
 
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  gdk_gc_set_foreground(gc,allocatecolor(0,$ffff,$ffff,Widget));
 
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  gdk_draw_polygon(win,gc,0,@triangle[1],4);
 
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  For I:=1 to 4 do
 
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    Triangle[i].Y:=400-Triangle[i].y;
 
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  gdk_draw_polygon(win,gc,-1,@triangle[1],4);
 
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  gdk_gc_set_foreground(gc,allocatecolor(0,$ffff,0,Widget));
 
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  For I:=1 to 4 do
 
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    Triangle[i].X:=600-Triangle[i].x;
 
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  gdk_draw_lines(win,gc,@triangle[1],4);
 
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  For I:=1 to 3 do
 
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    begin
 
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    SegTriangle[i].X1:=Triangle[i].X;
 
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    SegTriangle[i].Y1:=400-Triangle[i].Y;
 
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    SegTriangle[i].X2:=Triangle[i+1].X;
 
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    SegTriangle[i].Y2:=400-Triangle[i+1].Y;
 
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    end;
 
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  gdk_draw_segments(win,gc,@segtriangle[1],3);
 
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  font:=gdk_font_load(FontName);
 
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  gdk_gc_set_foreground(gc,allocatecolor($ffff,$ffff,0,Widget));
 
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  For I:=1 to 4 do
 
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    gdk_draw_string(win,font,gc,I*100,300,Pchar(format('String %d',[i])));
 
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  result:=0;
 
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end;
 
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Begin
 
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  // Initialize GTK and create the main window
 
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  gtk_init( @argc, @argv );
 
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  window := gtk_window_new( GTK_WINDOW_TOPLEVEL );
 
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  gtk_window_set_policy(PgtkWindow(Window),0,0,1);
 
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  gtk_signal_connect (GTK_OBJECT (window), 'delete_event',
 
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          GTK_SIGNAL_FUNC( @close_application ), NIL);
 
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  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
 
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  area := gtk_drawing_area_new();
 
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  gtk_container_add( GTK_CONTAINER(window), Area);
 
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  gtk_signal_connect (GTK_OBJECT (area),'expose_event',
 
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                      GTK_SIGNAL_FUNC(@Exposed),Nil);
 
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  gtk_drawing_area_size (PGTKDRAWINGAREA(area),600,400);
 
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  gtk_widget_show_all( window );
 
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  gtk_main();
 
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end.