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comparison dwtx/draw2d/NativeGraphicsSource.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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96:b492ba44e44d 98:95307ad235d9
1 /*******************************************************************************
2 * Copyright (c) 2005 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13
14 module dwtx.draw2d.NativeGraphicsSource;
15
16 import dwt.dwthelper.utils;
17
18
19
20 import dwt.widgets.Control;
21 import dwtx.draw2d.geometry.Rectangle;
22 import dwtx.draw2d.GraphicsSource;
23 import dwtx.draw2d.Graphics;
24
25 /**
26 * A graphics source that posts a paint request to the control rather than constructing GC
27 * on it directly. This allows the OS's native painting mechanism to be used directly,
28 * including any double-buffering that the OS may provide for free.
29 * @since 3.2
30 */
31 public final class NativeGraphicsSource : GraphicsSource {
32
33 private final Control canvas;
34
35 /**
36 * Constructs a new graphics source on the given control.
37 * @param canvas the control
38 * @since 3.2
39 */
40 public this(Control canvas) {
41 this.canvas = canvas;
42 }
43
44 /**
45 * Always returns <code>null</code>, because
46 * @see GraphicsSource#getGraphics(Rectangle)
47 */
48 public Graphics getGraphics(Rectangle r) {
49 canvas.redraw(r.x, r.y, r.width, r.height, false);
50 canvas.update();
51 return null;
52 }
53
54 /**
55 * Does nothing.
56 * @see GraphicsSource#flushGraphics(Rectangle)
57 */
58 public void flushGraphics(Rectangle region) { }
59
60 }