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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 * Bill Baxter <wbaxter> at gmail com
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12 *******************************************************************************/
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13 module org.eclipse.swt.snippets.Snippet21;
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14
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15 /*
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16 * Canvas example snippet: implement tab traversal (behave like a tab group)
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17 *
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18 * For a list of all SWT example snippets see
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19 * http://www.eclipse.org/swt/snippets/
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20 */
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21 import org.eclipse.swt.SWT;
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22 import org.eclipse.swt.graphics.Color;
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23 import org.eclipse.swt.widgets.Display;
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24 import org.eclipse.swt.widgets.Shell;
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25 import org.eclipse.swt.widgets.Listener;
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26 import org.eclipse.swt.widgets.Event;
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27 import org.eclipse.swt.widgets.Button;
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28 import org.eclipse.swt.widgets.Text;
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29 import org.eclipse.swt.widgets.Canvas;
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30
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31 import tango.io.Stdout;
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32
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33 import java.lang.all;
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34
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35 void main () {
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36 Display display = new Display ();
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37 final Color red = display.getSystemColor (SWT.COLOR_RED);
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38 final Color blue = display.getSystemColor (SWT.COLOR_BLUE);
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39 Shell shell = new Shell (display);
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40 Button b = new Button (shell, SWT.PUSH);
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41 b.setBounds (10, 10, 100, 32);
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42 b.setText ("Button");
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43 shell.setDefaultButton (b);
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44 final Canvas c = new Canvas (shell, SWT.BORDER);
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45 c.setBounds (10, 50, 100, 32);
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46
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47 void onTraverse(Event e, Canvas c) {
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48 switch (e.detail) {
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49 /* Do tab group traversal */
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50 case SWT.TRAVERSE_ESCAPE:
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51 case SWT.TRAVERSE_RETURN:
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52 case SWT.TRAVERSE_TAB_NEXT:
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53 case SWT.TRAVERSE_TAB_PREVIOUS:
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54 case SWT.TRAVERSE_PAGE_NEXT:
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55 case SWT.TRAVERSE_PAGE_PREVIOUS:
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56 e.doit = true;
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57 break;
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58 }
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59 }
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60
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61 void onFocusIn(Event e, Canvas c) {
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62 c.setBackground (red);
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63 }
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64
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65 void onFocusOut(Event e, Canvas c) {
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66 c.setBackground (blue);
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67 }
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68
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69 void onKeyDown (Event e, Canvas c) {
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70 Stdout("KEY").newline;
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71 for (int i=0; i<64; i++) {
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72 Color c1 = red, c2 = blue;
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73 if (c.isFocusControl ()) {
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74 c1 = blue; c2 = red;
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75 }
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76 c.setBackground (c1);
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77 c.update ();
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78 c.setBackground (c2);
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79 }
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80 }
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81
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82 c.addListener (SWT.Traverse, dgListener(&onTraverse, c));
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83 c.addListener (SWT.FocusIn, dgListener(&onFocusIn, c));
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84 c.addListener (SWT.FocusOut, dgListener(&onFocusOut, c));
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85 c.addListener (SWT.KeyDown, dgListener(&onKeyDown, c));
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86
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87 Text t = new Text (shell, SWT.SINGLE | DWT.BORDER);
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88 t.setBounds (10, 85, 100, 32);
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89
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90 Text r = new Text (shell, SWT.MULTI | DWT.BORDER);
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91 r.setBounds (10, 120, 100, 32);
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92
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93 c.setFocus ();
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94 shell.setSize (200, 200);
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95 shell.open ();
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96 while (!shell.isDisposed()) {
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97 if (!display.readAndDispatch ()) display.sleep ();
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98 }
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99 display.dispose ();
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100 }
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