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Add Cairo Sample

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svn path=/trunk/gtk-sharp/; revision=20607
This commit is contained in:
Miguel de Icaza 2003-11-29 22:17:52 +00:00
parent 24675d159c
commit 9488ce6796
1 changed files with 118 additions and 0 deletions
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sample/CairoSample.cs Normal file
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//
// Sample program demostrating using Cairo with Gtk#
//
using Gtk;
using Gdk;
using System;
using GtkSharp;
using Cairo;
class X {
static DrawingArea a, b;
static void Main ()
{
Application.Init ();
Gtk.Window w = new Gtk.Window ("Hello");
a = new DrawingArea ();
a.ExposeEvent += new ExposeEventHandler (LineExposeHandler);
b = new DrawingArea ();
b.ExposeEvent += new ExposeEventHandler (CirclesExposeHandler);
b.SizeAllocated += new SizeAllocatedHandler (SizeAllocatedHandler);
Box box = new HBox (true, 0);
//box.Add (a);
box.Add (b);
w.Add (box);
w.ShowAll ();
Application.Run ();
}
static void LineExposeHandler (object obj, ExposeEventArgs args)
{
int offx, offy;
using (Cairo.Object o = args.Event.window.CairoGraphics (out offx, out offy)){
o.SetRGBColor (1, 0, 0);
o.Translate (-offx, -offy);
o.MoveTo (0, 0);
o.LineTo (100, 100);
o.Stroke ();
}
}
static Rectangle rect;
static void SizeAllocatedHandler (object obj, SizeAllocatedArgs args)
{
rect = args.Allocation;
}
static void CirclesExposeHandler (object obj, ExposeEventArgs args)
{
Rectangle area = args.Event.area;
Gdk.Window window = args.Event.window;
Pixmap p = new Pixmap (window, area.width, area.height, -1);
int x, y;
//Cairo.Object o = p.CairoGraphics ();
using (Cairo.Object o = window.CairoGraphics (out x, out y))
{
o.Translate (-area.x, -area.y);
DrawCircles (o, rect);
//using (Gdk.GC gc = new Gdk.GC (window)){
//window.DrawDrawable (gc, p, 0, 0, area.x, area.y, area.height, area.width);
//}
}
}
static void DrawCircles (Cairo.Object o, Gdk.Rectangle rect)
{
FillChecks (o, rect);
}
const int CS = 32;
static void FillChecks (Cairo.Object o, Gdk.Rectangle rect)
{
Surface check;
// Draw the check
o.Save ();
using (check = Surface.CreateSimilar (o.TargetSurface, Format.RGB24, 2 * CS, 2 * CS)){
#if true
o.Save ();
check.Repeat = 1;
o.TargetSurface = check;
o.Operator = Operator.Src;
o.SetRGBColor (0.4, 0.4, 0.4);
// Clear the background
o.Rectangle (0, 0, 2*CS, 2*CS);
o.Fill ();
o.SetRGBColor (0.7, 0.7, 0.7);
o.Rectangle (0, CS, CS, CS *2);
o.Fill ();
o.Rectangle (CS, 0, CS*2, CS);
o.Fill ();
o.Restore ();
// Fill the surface with the check
o.SetPattern (check);
o.Rectangle (0, 0, rect.width, rect.height);
o.Fill ();
#endif
}
o.Restore ();
o.SetRGBColor (1, 0, 0);
o.Alpha = 0.5;
Console.WriteLine (rect);
o.MoveTo (0, 0);
o.LineTo (rect.width, rect.height);
o.Stroke ();
}
}