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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2004 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * D Port:
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11 * Thomas Demmer <t_demmer AT web DOT de>
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12 *******************************************************************************/
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13 module busyindicator.Snippet130;
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14 /*
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15 * BusyIndicator example snippet: display busy cursor during long running task
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16 *
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17 * For a list of all SWT example snippets see
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18 * http://www.eclipse.org/swt/snippets/
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19 */
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20 import dwt.DWT;
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21 import dwt.events.SelectionAdapter;
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22 import dwt.events.SelectionEvent;
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23 import dwt.layout.GridLayout;
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24 import dwt.layout.GridData;
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25 import dwt.widgets.Shell;
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26 import dwt.widgets.Button;
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27 import dwt.widgets.Display;
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28 import dwt.widgets.Shell;
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29 import dwt.widgets.Text;
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30
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31
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32 import dwt.custom.BusyIndicator;
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33
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34 import dwt.dwthelper.utils;
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35 import dwt.dwthelper.Runnable;
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36 import dwt.dwthelper.System;
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37
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38 import tango.core.Thread;
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39 import tango.io.Stdout;
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40 import tango.util.Convert;
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41 import tango.util.log.Trace;
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42
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43
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44 void main(String[] args){
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45 Snippet130.main(args);
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46 }
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47
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48 public class Snippet130 {
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49
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50 public static void main(String[] args) {
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51 Display display = new Display();
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52 Shell shell = new Shell(display);
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53 shell.setLayout(new GridLayout());
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54 Text text = new Text(shell, DWT.MULTI | DWT.BORDER | DWT.V_SCROLL);
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55 text.setLayoutData(new GridData(GridData.FILL_BOTH));
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56 int[] nextId = new int[1];
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57 Button b = new Button(shell, DWT.PUSH);
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58 b.setText("invoke long running job");
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59
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60 b.addSelectionListener(new class() SelectionAdapter {
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61 public void widgetSelected(SelectionEvent e) {
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62 Runnable longJob = new class() Runnable {
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63 bool done = false;
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64 int id;
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65 public void run() {
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66 Thread thread = new Thread({
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67 id = nextId[0]++;
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68 display.syncExec( dgRunnable( &printStart, text, id ));
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69 for (int i = 0; i < 6; i++) {
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70 if (display.isDisposed()) return;
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71 Trace.formatln("do task that takes a long time in a separate thread {} {}/6", id, i);
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72 Thread.sleep(0.500);
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73 }
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74 /*
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75 for (int i = 0; i < 100000; i++) {
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76 if (display.isDisposed()) return;
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77 Stdout.formatln("do task that takes a long time in a separate thread {}", id);
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78 }
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79 */
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80 if (display.isDisposed()) return;
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81 display.syncExec( dgRunnable( &printEnd, text, id ));
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82 done = true;
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83 display.wake();
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84 }); // thread = ...
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85 thread.start();
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86
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87 while (!done && !shell.isDisposed()) {
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88 if (!display.readAndDispatch())
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89 display.sleep();
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90 }
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91 }
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92 }; // Runnable longJob = ...
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93 BusyIndicator.showWhile(display, longJob);
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94 } // widgetSelected();
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95 }); // addSelectionListener
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96
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97
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98 shell.setSize(250, 150);
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99 shell.open();
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100 while (!shell.isDisposed()) {
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101 if (!display.readAndDispatch())
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102 display.sleep();
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103 }
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104 display.dispose();
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105 }
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106 private void printStart(Text text, int id ) {
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107 if (text.isDisposed()) return;
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108 Trace.formatln( "Start long running task {}", id );
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109 text.append("\nStart long running task "~to!(char[])(id));
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110 }
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111 private void printEnd(Text text, int id ) {
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112 if (text.isDisposed()) return;
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113 Trace.formatln( "Completed long running task {}", id );
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114 text.append("\nCompleted long running task "~to!(char[])(id));
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115 }
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116 }
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