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comparison snippets/busyindicator/Snippet130.d @ 113:7194dba256b8

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Add Snippet130. Thanks TomD.
author Frank Benoit <benoit@tionex.de>
date Fri, 11 Jul 2008 01:42:44 +0200
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children 8cdaac0dc743
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112:cfb304d22f28 113:7194dba256b8
1 /*******************************************************************************
2 * Copyright (c) 2000, 2004 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 *******************************************************************************/
11
12 /*
13 * BusyIndicator example snippet: display busy cursor during long running task
14 *
15 * For a list of all SWT example snippets see
16 * http://www.eclipse.org/swt/snippets/
17 */
18 module busyindicator.Snippet130;
19
20 import dwt.DWT;
21 import dwt.events.SelectionAdapter;
22 import dwt.events.SelectionEvent;
23 import dwt.layout.GridLayout;
24 import dwt.layout.GridData;
25 import dwt.widgets.Shell;
26 import dwt.widgets.Button;
27 import dwt.widgets.Display;
28 import dwt.widgets.Shell;
29 import dwt.widgets.Text;
30
31
32 import dwt.custom.BusyIndicator;
33
34 import dwt.dwthelper.utils;
35 import dwt.dwthelper.Runnable;
36 import dwt.dwthelper.System;
37
38 import tango.core.Thread;
39 import tango.util.Convert;
40 import tango.util.log.Trace;
41
42 void main(String[] args){
43 Snippet130.main(args);
44 }
45
46 public class Snippet130 {
47
48 public static void main(String[] args) {
49 Display display = new Display();
50 Shell shell = new Shell(display);
51 shell.setLayout(new GridLayout());
52 Text text = new Text(shell, DWT.MULTI | DWT.BORDER | DWT.V_SCROLL);
53 text.setLayoutData(new GridData(GridData.FILL_BOTH));
54 int[1] nextId;
55 Button b = new Button(shell, DWT.PUSH);
56 b.setText("invoke long running job");
57
58 b.addSelectionListener(new class() SelectionAdapter {
59 public void widgetSelected(SelectionEvent e) {
60 Runnable longJob = new class() Runnable {
61 bool done = false;
62 int id;
63 private void runThread(){
64 id = nextId[0]++;
65 display.syncExec( dgRunnable( &printStart, text, id ));
66 for (int i = 0; i < 6; i++) {
67 if (display.isDisposed()) return;
68 Trace.formatln("do task that takes a long time in a separate thread {} {}/6", id, i);
69 Thread.sleep(0.500);
70 }
71 if (display.isDisposed()) return;
72 display.syncExec( dgRunnable( &printEnd , text, id )); // display.syncExec
73 done = true;
74 display.wake();
75 }
76 public void run() {
77 Thread thread = new Thread( &runThread );
78 thread.start();
79
80 while (!done && !shell.isDisposed()) {
81 if (!display.readAndDispatch())
82 display.sleep();
83 }
84 }
85 }; // Runnable longJob = ...
86 BusyIndicator.showWhile(display, longJob);
87 } // widgetSelected();
88 }); // addSelectionListener
89
90
91 shell.setSize(250, 150);
92 shell.open();
93 while (!shell.isDisposed()) {
94 if (!display.readAndDispatch())
95 display.sleep();
96 }
97 display.dispose();
98 }
99 private void printStart(Text text, int id ) {
100 if (text.isDisposed()) return;
101 Trace.formatln( "Start long running task {}", id );
102 text.append("\nStart long running task "~to!(char[])(id));
103 }
104 private void printEnd(Text text, int id ) {
105 if (text.isDisposed()) return;
106 Trace.formatln( "Completed long running task {}", id );
107 text.append("\nCompleted long running task "~to!(char[])(id));
108 }
109 }
110
111