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comparison snippets/canvas/Snippet275.d @ 90:29bf9ba4756b

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Port of all canvas snippets
author Bill Baxter <bill@billbaxter.com>
date Tue, 20 May 2008 12:10:54 +0900
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children 1f0a7a472680
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89:cbba80cceb7a 90:29bf9ba4756b
1 /*******************************************************************************
2 * Copyright (c) 2000, 2007 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 * D Port:
11 * Bill Baxter <wbaxter> at gmail com
12 *******************************************************************************/
13 module snippets.canvas.Snippet275;
14
15 /*
16 * Canvas snippet: update a portion of a Canvas frequently
17 *
18 * For a list of all SWT example snippets see
19 * http://www.eclipse.org/swt/snippets/
20 */
21 import dwt.DWT;
22 import dwt.graphics.GC;
23 import dwt.graphics.Color;
24 import dwt.graphics.Point;
25 import dwt.graphics.Image;
26 import dwt.widgets.Display;
27 import dwt.widgets.Shell;
28 import dwt.widgets.Event;
29 import dwt.widgets.Listener;
30 import dwt.widgets.Canvas;
31
32 import dwt.dwthelper.System;
33 import dwt.dwthelper.utils;
34 import dwt.dwthelper.Runnable;
35
36 import tango.util.Convert;
37
38 static String value;
39 public static void main () {
40 final int INTERVAL = 888;
41 final Display display = new Display ();
42 final Image image = new Image (display, 750, 750);
43 GC gc = new GC (image);
44 gc.setBackground (display.getSystemColor (DWT.COLOR_RED));
45 gc.fillRectangle (image.getBounds ());
46 gc.dispose ();
47
48 Shell shell = new Shell (display);
49 shell.setBounds (10, 10, 790, 790);
50 final Canvas canvas = new Canvas (shell, DWT.NONE);
51 canvas.setBounds (10, 10, 750, 750);
52
53 void onPaint (Event event) {
54 value = to!(char[])(System.currentTimeMillis ());
55 event.gc.drawImage (image, 0, 0);
56 event.gc.drawString (value, 10, 10, true);
57 }
58 canvas.addListener (DWT.Paint, dgListener(&onPaint));
59
60 display.timerExec (INTERVAL, new class Runnable {
61 void run () {
62 if (canvas.isDisposed ()) return;
63 // canvas.redraw (); // <-- bad, damages more than is needed
64 GC gc = new GC (canvas);
65 Point extent = gc.stringExtent (value ~ '0');
66 gc.dispose ();
67 canvas.redraw (10, 10, extent.x, extent.y, false);
68 display.timerExec (INTERVAL, this);
69 }
70 });
71 shell.open ();
72 while (!shell.isDisposed ()){
73 if (!display.readAndDispatch ()) display.sleep ();
74 }
75 image.dispose ();
76 display.dispose ();
77 }