Add Cairo Sample

svn path=/trunk/gtk-sharp/; revision=20607
2003-11-29 22:17:52 +00:00 · 2003-11-29 22:17:52 +00:00 · 9488ce6796
commit 9488ce6796
parent 24675d159c
1 changed files with 118 additions and 0 deletions
--- a/sample/CairoSample.cs
+++ b/sample/CairoSample.cs
@ -0,0 +1,118 @@
+//
+// 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 ();
+	}
+}