117 lines
2.6 KiB
C#
117 lines
2.6 KiB
C#
//
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// Sample program demostrating using Cairo with Gtk#
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//
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using Gtk;
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using Gdk;
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using System;
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using Cairo;
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class X {
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static DrawingArea a, b;
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static void Main ()
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{
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Application.Init ();
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Gtk.Window w = new Gtk.Window ("Hello");
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a = new DrawingArea ();
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a.ExposeEvent += new ExposeEventHandler (LineExposeHandler);
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b = new DrawingArea ();
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b.ExposeEvent += new ExposeEventHandler (CirclesExposeHandler);
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b.SizeAllocated += new SizeAllocatedHandler (SizeAllocatedHandler);
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Box box = new HBox (true, 0);
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//box.Add (a);
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box.Add (b);
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w.Add (box);
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w.ShowAll ();
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Application.Run ();
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}
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static void LineExposeHandler (object obj, ExposeEventArgs args)
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{
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int offx, offy;
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using (Cairo.Graphics o = GtkCairo.GraphicsFromWindow (args.Event.Window, out offx, out offy)){
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o.SetRGBColor (1, 0, 0);
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o.Translate (-offx, -offy);
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o.MoveTo (0, 0);
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o.LineTo (100, 100);
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o.Stroke ();
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}
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}
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static Rectangle rect;
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static void SizeAllocatedHandler (object obj, SizeAllocatedArgs args)
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{
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rect = args.Allocation;
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}
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static void CirclesExposeHandler (object obj, ExposeEventArgs args)
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{
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Rectangle area = args.Event.Area;
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Gdk.Window window = args.Event.Window;
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Pixmap p = new Pixmap (window, area.Width, area.Height, -1);
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int x, y;
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//Cairo.Object o = p.CairoGraphics ();
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using (Cairo.Graphics o = GtkCairo.GraphicsFromWindow (window, out x, out y))
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{
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o.Translate (-area.X, -area.Y);
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DrawCircles (o, rect);
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//using (Gdk.GC gc = new Gdk.GC (window)){
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//window.DrawDrawable (gc, p, 0, 0, area.x, area.y, area.height, area.width);
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//}
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}
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}
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static void DrawCircles (Cairo.Graphics o, Gdk.Rectangle rect)
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{
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FillChecks (o, rect);
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}
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const int CS = 32;
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static void FillChecks (Cairo.Graphics o, Gdk.Rectangle rect)
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{
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Surface check;
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// Draw the check
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o.Save ();
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using (check = Surface.CreateSimilar (o.TargetSurface, Format.RGB24, 2 * CS, 2 * CS)){
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#if true
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o.Save ();
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check.Repeat = 1;
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o.TargetSurface = check;
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o.Operator = Operator.Src;
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o.SetRGBColor (0.4, 0.4, 0.4);
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// Clear the background
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o.Rectangle (0, 0, 2*CS, 2*CS);
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o.Fill ();
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o.SetRGBColor (0.7, 0.7, 0.7);
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o.Rectangle (0, CS, CS, CS *2);
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o.Fill ();
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o.Rectangle (CS, 0, CS*2, CS);
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o.Fill ();
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o.Restore ();
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// Fill the surface with the check
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//o.SetPattern (check);
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o.Rectangle (0, 0, rect.Width, rect.Height);
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o.Fill ();
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#endif
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}
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o.Restore ();
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o.SetRGBColor (1, 0, 0);
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o.Alpha = 0.5;
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Console.WriteLine (rect);
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o.MoveTo (0, 0);
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o.LineTo (rect.Width, rect.Height);
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o.Stroke ();
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}
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}
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