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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 * Jesse Phillips <Jesse.K.Phillips+D> gmail.com
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12 *******************************************************************************/
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13 module org.eclipse.swt.snippets.Snippet8;
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14
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15 /*
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16 * Tree example snippet: create a tree (lazy)
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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
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22 import org.eclipse.swt.SWT;
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23 import org.eclipse.swt.layout.FillLayout;
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24 import org.eclipse.swt.graphics.Point;
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25 import org.eclipse.swt.widgets.Display;
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26 import org.eclipse.swt.widgets.Event;
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27 import org.eclipse.swt.widgets.Listener;
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28 import org.eclipse.swt.widgets.Shell;
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29 import org.eclipse.swt.widgets.Tree;
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30 import org.eclipse.swt.widgets.TreeItem;
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31
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32 import java.lang.all;
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33 import tango.io.FilePath;
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34 import tango.io.FileSystem;
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35
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36 void main () {
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37 auto display = new Display ();
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38 auto shell = new Shell (display);
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39 shell.setText ("Lazy Tree");
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40 shell.setLayout (new FillLayout ());
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41 auto tree = new Tree (shell, SWT.BORDER);
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42 auto roots = FileSystem.roots();
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43 foreach (file; roots) {
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44 auto root = new TreeItem (tree, 0);
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45 root.setText (file);
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46 root.setData (new FilePath(file));
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47 new TreeItem (root, 0);
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48 }
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49 tree.addListener (SWT.Expand, new class Listener {
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50 public void handleEvent (Event event) {
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51 auto root = cast(TreeItem) event.item;
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52 auto items = root.getItems ();
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53 foreach(item; items) {
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54 if (item.getData () !is null) return;
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55 item.dispose ();
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56 }
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57 auto file = cast(FilePath) root.getData ();
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58 auto files = file.toList();
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59 if (files is null) return;
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60 foreach (f; files) {
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61 TreeItem item = new TreeItem (root, 0);
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62 item.setText (f.toString());
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63 item.setData (f);
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64 if (f.isFolder()) {
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65 new TreeItem (item, 0);
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66 }
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67 }
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68 }
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69 });
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70 auto size = tree.computeSize (300, SWT.DEFAULT);
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71 auto width = Math.max (300, size.x);
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72 auto height = Math.max (300, size.y);
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73 shell.setSize (shell.computeSize (width, height));
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74 shell.open ();
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75 while (!shell.isDisposed ()) {
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76 if (!display.readAndDispatch ()) display.sleep ();
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77 }
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78 display.dispose ();
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79 }
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