Mercurial > projects > dwt-samples
annotate snippets/tree/Snippet220.d @ 85:fa286c85e7b8
Fix Snippet111 and add jive to Snippet220
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 17 May 2008 23:26:35 +0200 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2006 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@gmail.com> |
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12 *******************************************************************************/ |
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13 module dwtsnippets.tree.Snippet220; |
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14 |
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15 /* |
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16 * Tree example snippet: Images on the right side of the TreeItem |
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17 * |
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18 * For a detailed explanation of this snippet see |
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19 * http://www.eclipse.org/articles/Article-CustomDrawingTableAndTreeItems/customDraw.htm#_example5 |
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20 * |
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21 * For a list of all SWT example snippets see |
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22 * http://www.eclipse.org/swt/snippets/ |
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23 * |
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24 * @since 3.2 |
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25 */ |
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26 |
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27 import dwt.DWT; |
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28 import dwt.graphics.Image; |
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29 import dwt.graphics.GC; |
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30 import dwt.widgets.Display; |
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31 import dwt.widgets.Shell; |
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32 import dwt.widgets.Listener; |
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33 import dwt.widgets.Event; |
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34 import dwt.widgets.Tree; |
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35 import dwt.widgets.TreeItem; |
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36 |
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37 import tango.util.Convert; |
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38 |
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39 import tango.io.Stdout; |
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40 version(JIVE){ |
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41 import jive.stacktrace; |
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42 } |
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43 |
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44 void main() { |
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45 Display display = new Display(); |
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46 Shell shell = new Shell(display); |
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47 shell.setBounds(10, 10, 350, 200); |
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48 Image xImage = new Image (display, 16, 16); |
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49 GC gc = new GC(xImage); |
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50 gc.setForeground(display.getSystemColor(DWT.COLOR_RED)); |
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51 gc.drawLine(1, 1, 14, 14); |
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52 gc.drawLine(1, 14, 14, 1); |
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53 gc.drawOval(2, 2, 11, 11); |
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54 gc.dispose(); |
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55 const int IMAGE_MARGIN = 2; |
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56 final Tree tree = new Tree(shell, DWT.CHECK); |
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57 tree.setBounds(10, 10, 300, 150); |
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58 TreeItem item = new TreeItem(tree, DWT.NONE); |
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59 item.setText("root item"); |
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60 for (int i = 0; i < 4; i++) { |
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61 TreeItem newItem = new TreeItem(item, DWT.NONE); |
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62 newItem.setText("descendent " ~ to!(char[])(i)); |
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63 if (i % 2 == 0) newItem.setData(xImage); |
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64 item.setExpanded(true); |
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65 item = newItem; |
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66 } |
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67 |
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68 /* |
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69 * NOTE: MeasureItem and PaintItem are called repeatedly. Therefore it is |
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70 * critical for performance that these methods be as efficient as possible. |
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71 */ |
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72 tree.addListener(DWT.MeasureItem, new class Listener { |
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73 public void handleEvent(Event event) { |
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74 Stdout("measure").newline; |
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75 TreeItem item = cast(TreeItem)event.item; |
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76 Image trailingImage = cast(Image)item.getData(); |
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77 if (trailingImage !is null) { |
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78 Stdout(" - measure image").newline; |
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79 event.width += trailingImage.getBounds().width + IMAGE_MARGIN; |
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80 } |
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81 } |
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82 }); |
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83 tree.addListener(DWT.PaintItem, new class Listener { |
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84 public void handleEvent(Event event) { |
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85 Stdout("paint").newline; |
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86 TreeItem item = cast(TreeItem)event.item; |
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87 Image trailingImage = cast(Image)item.getData(); |
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88 if (trailingImage !is null) { |
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89 Stdout(" - draw image").newline; |
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90 int x = event.x + event.width + IMAGE_MARGIN; |
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91 int itemHeight = tree.getItemHeight(); |
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92 int imageHeight = trailingImage.getBounds().height; |
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93 int y = event.y + (itemHeight - imageHeight) / 2; |
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94 event.gc.drawImage(trailingImage, x, y); |
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95 } |
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96 } |
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97 }); |
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98 |
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99 shell.open(); |
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100 while (!shell.isDisposed()) { |
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101 if (!display.readAndDispatch()) display.sleep(); |
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102 } |
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103 xImage.dispose(); |
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104 display.dispose(); |
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105 } |