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* samples/Scribble.cs: Im bored, you can erase, etc svn path=/trunk/gtk-sharp/; revision=27565
123 lines
3.3 KiB
C#
123 lines
3.3 KiB
C#
// Scribble.cs - port of Gtk+ scribble demo
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//
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// Author: Rachel Hestilow <hestilow@ximian.com>
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//
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// (c) 2002 Rachel Hestilow
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namespace GtkSamples {
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using Gtk;
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using Gdk;
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using System;
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public class Scribble {
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private static Gtk.DrawingArea darea;
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private static Gdk.Pixmap pixmap = null;
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public static int Main (string[] args)
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{
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Application.Init ();
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Gtk.Window win = new Gtk.Window ("Scribble demo");
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win.DeleteEvent += new DeleteEventHandler (Window_Delete);
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darea = new Gtk.DrawingArea ();
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darea.SetSizeRequest (200, 200);
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win.Add (darea);
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darea.ExposeEvent += new ExposeEventHandler (ExposeEvent);
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darea.ConfigureEvent += new ConfigureEventHandler (ConfigureEvent);
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darea.MotionNotifyEvent += new MotionNotifyEventHandler (MotionNotifyEvent);
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darea.ButtonPressEvent += new ButtonPressEventHandler (ButtonPressEvent);
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darea.Events = EventMask.ExposureMask | EventMask.LeaveNotifyMask |
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EventMask.ButtonPressMask | EventMask.PointerMotionMask |
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EventMask.PointerMotionHintMask;
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win.ShowAll ();
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Application.Run ();
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return 0;
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}
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static void Window_Delete (object obj, DeleteEventArgs args)
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{
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Application.Quit ();
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args.RetVal = true;
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}
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static void ExposeEvent (object obj, ExposeEventArgs args)
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{
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Gdk.Rectangle area = args.Event.Area;
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args.Event.Window.DrawDrawable (darea.Style.BlackGC,
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pixmap,
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area.X, area.Y,
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area.X, area.Y,
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area.Width, area.Height);
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args.RetVal = false;
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}
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static void ConfigureEvent (object obj, ConfigureEventArgs args)
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{
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Gdk.EventConfigure ev = args.Event;
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Gdk.Window window = ev.Window;
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Gdk.Rectangle allocation = darea.Allocation;
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pixmap = new Gdk.Pixmap (window, allocation.Width, allocation.Height, -1);
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pixmap.DrawRectangle (darea.Style.WhiteGC, true, 0, 0,
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allocation.Width, allocation.Height);
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args.RetVal = true;
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}
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static void DrawBrush (double x, double y, bool black)
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{
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Gdk.Rectangle update_rect = new Gdk.Rectangle ();
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update_rect.X = (int) x - 5;
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update_rect.Y = (int) y - 5;
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update_rect.Width = 10;
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update_rect.Height = 10;
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pixmap.DrawRectangle (black ? darea.Style.BlackGC : darea.Style.WhiteGC, true,
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update_rect.X, update_rect.Y,
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update_rect.Width, update_rect.Height);
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darea.QueueDrawArea (update_rect.X, update_rect.Y,
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update_rect.Width, update_rect.Height);
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}
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static void ButtonPressEvent (object obj, ButtonPressEventArgs args)
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{
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Gdk.EventButton ev = args.Event;
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if (ev.Button == 1 && pixmap != null)
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DrawBrush (ev.X, ev.Y, true);
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else if (ev.Button == 3 && pixmap != null)
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DrawBrush (ev.X, ev.Y, false);
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args.RetVal = true;
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}
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static void MotionNotifyEvent (object obj, MotionNotifyEventArgs args)
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{
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int x, y;
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Gdk.ModifierType state;
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Gdk.EventMotion ev = args.Event;
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Gdk.Window window = ev.Window;
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if (ev.IsHint) {
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Gdk.ModifierType s;
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window.GetPointer (out x, out y, out s);
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state = s;
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} else {
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x = (int) ev.X;
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y = (int) ev.Y;
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state = ev.State;
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}
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if ((state & Gdk.ModifierType.Button1Mask) != 0 && pixmap != null)
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DrawBrush (x, y, true);
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else if ((state & Gdk.ModifierType.Button3Mask) != 0 && pixmap != null)
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DrawBrush (x, y, false);
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args.RetVal = true;
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}
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}
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}
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