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52 lines
1.5 KiB
C#
52 lines
1.5 KiB
C#
//
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// System.Drawing integration with Gtk#
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//
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// Miguel de Icaza
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//
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// API issues:
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// Maybe make the translation `out' parameters so they are explicit and the user knows about it?
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// Add a way to copy a Graphics into a drawable?
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//
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using System;
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using System.Reflection;
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using System.Runtime.InteropServices;
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namespace Gdk {
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public class Graphics {
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[DllImport("libgdk-win32-2.0-0.dll")]
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internal static extern IntPtr gdk_x11_drawable_get_xdisplay (IntPtr raw);
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[DllImport("libgdk-win32-2.0-0.dll")]
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internal static extern IntPtr gdk_x11_drawable_get_xid (IntPtr raw);
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public static System.Drawing.Graphics FromDrawable (Gdk.Drawable drawable)
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{
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IntPtr x_drawable;
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int x_off = 0, y_off = 0;
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if (drawable is Gdk.Window){
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((Gdk.Window) drawable).GetInternalPaintInfo(out drawable, out x_off, out y_off);
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}
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x_drawable = drawable.Handle;
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IntPtr display = gdk_x11_drawable_get_xdisplay (x_drawable);
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Type graphics = typeof (System.Drawing.Graphics);
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MethodInfo mi = graphics.GetMethod ("FromXDrawable", BindingFlags.Static | BindingFlags.NonPublic);
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if (mi == null)
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throw new NotImplementedException ("In this implementation I can not get a graphics from a drawable");
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object [] args = new object [2] { (IntPtr) gdk_x11_drawable_get_xid (drawable.Handle), (IntPtr) display };
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object r = mi.Invoke (null, args);
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System.Drawing.Graphics g = (System.Drawing.Graphics) r;
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g.TranslateTransform (-x_off, -y_off);
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return g;
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}
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}
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}
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