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comparison dwt/custom/BusyIndicator.d @ 41:6337764516f1

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Sync dwt/custom with dwt-linux (took copy of complete folder)
author Frank Benoit <benoit@tionex.de>
date Tue, 07 Oct 2008 16:29:55 +0200
parents f565d3a95c0a
children 07399639c0c8
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40:fbe68c33eeee 41:6337764516f1
1 /******************************************************************************* 1 /*******************************************************************************
2 * Copyright (c) 2000, 2006 IBM Corporation and others. 2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials 3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0 4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at 5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html 6 * http://www.eclipse.org/legal/epl-v10.html
7 * 7 *
8 * Contributors: 8 * Contributors:
9 * IBM Corporation - initial API and implementation 9 * IBM Corporation - initial API and implementation
10 *
11 * Port to the D programming language: 10 * Port to the D programming language:
12 * Jacob Carlborg <jacob.carlborg@gmail.com> 11 * Frank Benoit <benoit@tionex.de>
13 *******************************************************************************/ 12 *******************************************************************************/
14 module dwt.custom.BusyIndicator; 13 module dwt.custom.BusyIndicator;
14
15
15 16
16 import dwt.DWT; 17 import dwt.DWT;
17 import dwt.graphics.Cursor; 18 import dwt.graphics.Cursor;
18 import dwt.widgets.Display; 19 import dwt.widgets.Display;
19 import dwt.widgets.Shell; 20 import dwt.widgets.Shell;
20
21 import dwt.dwthelper.Runnable; 21 import dwt.dwthelper.Runnable;
22 import dwt.dwthelper.string; 22 import dwt.dwthelper.utils;
23 import dwt.dwthelper.utils : Integer;
24 23
25 /** 24 /**
26 * Support for showing a Busy Cursor during a long running process. 25 * Support for showing a Busy Cursor during a long running process.
26 *
27 * @see <a href="http://www.eclipse.org/swt/snippets/#busyindicator">BusyIndicator snippets</a>
28 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
27 */ 29 */
28 public class BusyIndicator { 30 public class BusyIndicator {
29 31
30 static int nextBusyId = 1; 32 static int nextBusyId = 1;
31 static final String BUSYID_NAME = "DWT BusyIndicator"; //$NON-NLS-1$ 33 static const String BUSYID_NAME = "DWT BusyIndicator"; //$NON-NLS-1$
32 static final String BUSY_CURSOR = "DWT BusyIndicator Cursor"; //$NON-NLS-1$ 34 static const String BUSY_CURSOR = "DWT BusyIndicator Cursor"; //$NON-NLS-1$
33 35
34 /** 36 /**
35 * Runs the given <code>Runnable</code> while providing 37 * Runs the given <code>Runnable</code> while providing
36 * busy feedback using this busy indicator. 38 * busy feedback using this busy indicator.
37 * 39 *
38 * @param display the display on which the busy feedback should be 40 * @param display the display on which the busy feedback should be
39 * displayed. If the display is null, the Display for the current 41 * displayed. If the display is null, the Display for the current
40 * thread will be used. If there is no Display for the current thread, 42 * thread will be used. If there is no Display for the current thread,
41 * the runnable code will be executed and no busy feedback will be displayed. 43 * the runnable code will be executed and no busy feedback will be displayed.
42 * @param runnable the runnable for which busy feedback is to be shown. 44 * @param runnable the runnable for which busy feedback is to be shown.
43 * Must not be null. 45 * Must not be null.
44 * 46 *
45 * @exception IllegalArgumentException <ul> 47 * @exception IllegalArgumentException <ul>
46 * <li>ERROR_NULL_ARGUMENT - if the runnable is null</li> 48 * <li>ERROR_NULL_ARGUMENT - if the runnable is null</li>
47 * </ul> 49 * </ul>
48 */ 50 */
49 51
50 public static void showWhile (Display display, Runnable runnable) { 52 public static void showWhile(Display display, Runnable runnable) {
51 if (runnable is null) 53 if (runnable is null)
52 DWT.error(DWT.ERROR_NULL_ARGUMENT); 54 DWT.error(DWT.ERROR_NULL_ARGUMENT);
55 if (display is null) {
56 display = Display.getCurrent();
53 if (display is null) { 57 if (display is null) {
54 display = Display.getCurrent(); 58 runnable.run();
55 if (display is null) { 59 return;
56 runnable.run();
57 return;
58 }
59 } 60 }
61 }
60 62
61 Integer busyId = new Integer(nextBusyId); 63 Integer busyId = new Integer(nextBusyId);
62 nextBusyId++; 64 nextBusyId++;
63 Cursor cursor = display.getSystemCursor(DWT.CURSOR_WAIT); 65 Cursor cursor = display.getSystemCursor(DWT.CURSOR_WAIT);
64 Shell[] shells = display.getShells(); 66 Shell[] shells = display.getShells();
67 for (int i = 0; i < shells.length; i++) {
68 Integer id = cast(Integer)shells[i].getData(BUSYID_NAME);
69 if (id is null) {
70 shells[i].setCursor(cursor);
71 shells[i].setData(BUSYID_NAME, busyId);
72 }
73 }
74
75 try {
76 runnable.run();
77 } finally {
78 shells = display.getShells();
65 for (int i = 0; i < shells.length; i++) { 79 for (int i = 0; i < shells.length; i++) {
66 Integer id = cast(Integer) shells[i].getData(BUSYID_NAME); 80 Integer id = cast(Integer)shells[i].getData(BUSYID_NAME);
67 if (id is null) { 81 if ( id !is null && id == busyId) {
68 shells[i].setCursor(cursor); 82 shells[i].setCursor(null);
69 shells[i].setData(BUSYID_NAME, busyId); 83 shells[i].setData(BUSYID_NAME, null);
70 }
71 }
72
73 try {
74 runnable.run();
75 }
76 finally {
77 shells = display.getShells();
78 for (int i = 0; i < shells.length; i++) {
79 Integer id = cast(Integer) shells[i].getData(BUSYID_NAME);
80 if (id is busyId) {
81 shells[i].setCursor(null);
82 shells[i].setData(BUSYID_NAME, null);
83 }
84 } 84 }
85 } 85 }
86 } 86 }
87 } 87 }
88 }