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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 org.eclipse.swt.snippets.Snippet46;
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14
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15 /*
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16 * Composite example snippet: intercept mouse events (drag a button with the mouse)
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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.Point;
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23 import org.eclipse.swt.graphics.Rectangle;
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24 import org.eclipse.swt.widgets.Button;
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25 import org.eclipse.swt.widgets.Composite;
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26 import org.eclipse.swt.widgets.Display;
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27 import org.eclipse.swt.widgets.Event;
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28 import org.eclipse.swt.widgets.Listener;
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29 import org.eclipse.swt.widgets.Shell;
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30 import org.eclipse.swt.layout.FillLayout;
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31
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32 import java.lang.all;
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33
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34 void main (String [] args) {
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35 Display display = new Display ();
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36 Shell shell = new Shell (display);
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37 Composite composite = new Composite (shell, SWT.NONE);
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38 composite.setEnabled (false);
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39 composite.setLayout (new FillLayout ());
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40 Button button = new Button (composite, SWT.PUSH);
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41 button.setText ("Button");
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42 composite.pack ();
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43 composite.setLocation (10, 10);
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44 Point [] offset = new Point [1];
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45 Listener listener = new class() Listener{
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46 public void handleEvent (Event event) {
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47 switch (event.type) {
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48 case SWT.MouseDown:
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49 Rectangle rect = composite.getBounds ();
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50 if (rect.contains (event.x, event.y)) {
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51 Point pt1 = composite.toDisplay (0, 0);
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52 Point pt2 = shell.toDisplay (event.x, event.y);
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53 offset [0] = new Point (pt2.x - pt1.x, pt2.y - pt1.y);
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54 }
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55 break;
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56 case SWT.MouseMove:
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57 if (offset [0] !is null) {
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58 Point pt = offset [0];
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59 composite.setLocation (event.x - pt.x, event.y - pt.y);
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60 }
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61 break;
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62 case SWT.MouseUp:
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63 offset [0] = null;
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64 break;
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65 }
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66 }
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67 };
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68 shell.addListener (SWT.MouseDown, listener);
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69 shell.addListener (SWT.MouseUp, listener);
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70 shell.addListener (SWT.MouseMove, listener);
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71 shell.setSize (300, 300);
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72 shell.open ();
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73 while (!shell.isDisposed ()) {
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74 if (!display.readAndDispatch ()) display.sleep ();
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75 }
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76 display.dispose ();
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77 }
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78
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