--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/novocode/ishell/internal/CustomDrawnButton.d	Sun Oct 26 14:54:39 2008 +0100
@@ -0,0 +1,134 @@
+/*******************************************************************************
+ * Copyright (c) 2005 Stefan Zeiger and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.novocode.com/legal/epl-v10.html
+ * 
+ * Contributors:
+ *     Stefan Zeiger (szeiger@novocode.com) - initial API and implementation
+ *******************************************************************************/
+
+module dwtx.novocode.ishell.internal.CustomDrawnButton;
+
+import dwt.DWT;
+import dwt.graphics.Point;
+import dwt.widgets.Canvas;
+import dwt.widgets.Composite;
+import dwt.widgets.Display;
+import dwt.widgets.Event;
+import dwt.widgets.Listener;
+
+
+/**
+ * A simple button control which needs to be subclassed to draw a specific
+ * kind of button. This base class provides the event handling.
+ * 
+ * @author Stefan Zeiger (szeiger@novocode.com)
+ * @since Jan 30, 2005
+ * @version $Id: CustomDrawnButton.java 320 2005-02-26 13:37:02 +0000 (Sat, 26 Feb 2005) szeiger $
+ */
+
+class CustomDrawnButton : Canvas
+{
+  private bool pressed;
+  private Display display;
+  private bool drawnMouseIn = false;
+
+
+  this(Composite parent, int style)
+  {
+    super(parent, style);
+    this.display = getDisplay();
+
+    addListener(DWT.Paint, dgListener(&paintListener));
+
+    addListener(DWT.MouseDown, dgListener(&onMouseDown));
+
+    addListener(DWT.MouseUp, dgListener(&onMouseUp));
+    
+    addListener(DWT.MouseMove, dgListener(&onMouseMove));
+  }
+  
+  
+  private void paintListener(Event event)
+  {
+        bool mouseIn = mouseIn();
+        onPaint(event, pressed && mouseIn);
+        drawnMouseIn = mouseIn;
+  }
+
+
+  private void onMouseDown(Event event)
+  {
+        if(event.button is 1)
+        {
+          pressed = true;
+          redraw();
+        }
+        else if(event.button is 3 && (event.stateMask & DWT.BUTTON1) !is 0) // chord click
+        {
+          pressed = false;
+          redraw();
+        }
+  }
+
+
+  private void onMouseUp(Event event)
+  {
+        if(pressed && (event.stateMask & DWT.BUTTON1) !is 0)
+        {
+          pressed = false;
+          if(mouseIn())
+          {
+            Event selectionEvent = new Event();
+            notifyListeners(DWT.Selection, selectionEvent);
+          }
+          if(!isDisposed()) redraw();
+        }
+  }
+
+
+  private void onMouseMove(Event event)
+  {
+        if(!pressed) return;
+        bool mouseIn = mouseIn();
+        if(mouseIn is drawnMouseIn) return;
+        redraw();
+  }
+
+
+  private bool mouseIn()
+  {
+    Point p = toControl(display.getCursorLocation());
+    if(p.x < -1 || p.y < -1) return false;
+    Point size = getSize();
+    return p.x <= size.x+1 && p.y <= size.y+1;
+  }
+
+
+  public Point computeSize(int wHint, int hHint, bool changed)
+  {
+    checkWidget();
+    if(wHint is DWT.DEFAULT) wHint = 0;
+    if(hHint is DWT.DEFAULT) hHint = 0;
+    return new Point(wHint, hHint);
+  }
+
+
+  public bool setFocus()
+  {
+    checkWidget();
+    return false;
+  }
+
+
+  public bool isReparentable ()
+  {
+    checkWidget();
+    return false;
+  }
+  
+  
+  protected abstract void onPaint(Event event, bool pressed);
+}