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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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112
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33 version(Tango){
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34 import tango.io.FilePath;
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35 import tango.io.FileSystem;
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36 } else { // Phobos
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37 import std.file;
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38 import std.path;
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39 class FileSystem {
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40 static string[] roots() {return [rel2abs(sep)];}
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41 }
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42 class FilePath {
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43 string path;
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44 this (string path) {this.path = path;}
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45 FilePath[] toList() {
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46 FilePath[] r;
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47 foreach (file; listDir(path)) {
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48 r ~= new FilePath(std.path.join(path, file));
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49 }
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50 return r;
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51 }
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52 bool isFolder() {return exists(path) && isDir(path);}
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53 string toString() {return path;}
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54 }
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55 }
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28
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56
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57 void main () {
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58 auto display = new Display ();
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59 auto shell = new Shell (display);
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60 shell.setText ("Lazy Tree");
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61 shell.setLayout (new FillLayout ());
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62 auto tree = new Tree (shell, SWT.BORDER);
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63 auto roots = FileSystem.roots();
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64 foreach (file; roots) {
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65 auto root = new TreeItem (tree, 0);
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66 root.setText (file);
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67 root.setData (new FilePath(file));
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68 new TreeItem (root, 0);
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69 }
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70 tree.addListener (SWT.Expand, new class Listener {
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71 public void handleEvent (Event event) {
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72 auto root = cast(TreeItem) event.item;
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73 auto items = root.getItems ();
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74 foreach(item; items) {
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75 if (item.getData () !is null) return;
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76 item.dispose ();
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77 }
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78 auto file = cast(FilePath) root.getData ();
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79 auto files = file.toList();
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80 if (files is null) return;
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81 foreach (f; files) {
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82 TreeItem item = new TreeItem (root, 0);
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83 item.setText (f.toString());
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84 item.setData (f);
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85 if (f.isFolder()) {
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86 new TreeItem (item, 0);
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87 }
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88 }
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89 }
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90 });
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91 auto size = tree.computeSize (300, SWT.DEFAULT);
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92 auto width = Math.max (300, size.x);
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93 auto height = Math.max (300, size.y);
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94 shell.setSize (shell.computeSize (width, height));
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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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