1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.launcher;
import java.lang.reflect.Method;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.TreeEvent;
import org.eclipse.swt.events.TreeListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.ViewPart;
/**
* Launcher uses <code>org.eclipse.swt</code>
* to launch the other registered examples.
*
* @see ViewPart
*/
public class LauncherView extends ViewPart {
private Shell workbenchShell;
private Tree launchTree;
private Text descriptionText;
private Button runButton;
/**
* Constructs a LauncherView.
*/
public LauncherView() {
LauncherPlugin.initResources();
}
/**
* Creates the example.
*
* @see ViewPart#createPartControl
*/
@Override
public void createPartControl(Composite parent) {
workbenchShell = getSite().getShell();
parent.setLayout(new SplitLayout());
Group launchGroup = new Group(parent, SWT.NONE);
launchGroup.setText(LauncherPlugin.getResourceString("view.launchGroup.text"));
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 2;
launchGroup.setLayout(gridLayout);
launchTree = new Tree(launchGroup, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
GridData gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL);
gridData.horizontalSpan = 2;
launchTree.setLayoutData(gridData);
launchTree.addSelectionListener(new SelectionListener() {
@Override
public void widgetSelected(SelectionEvent event) {
final ItemDescriptor item = getSelectedItem();
setDescriptionByItem(item);
}
@Override
public void widgetDefaultSelected(SelectionEvent event) {
final ItemDescriptor item = getSelectedItem();
setDescriptionByItem(item);
if (item.getMainType() == null && item.getView() == null) {
// Category selected, so just expand/colapse the node
TreeItem treeItem = (TreeItem) event.item;
boolean expanded = treeItem.getExpanded();
if (treeItem != null) treeItem.setExpanded(!expanded);
treeItem.setImage(LauncherPlugin.images[expanded ? LauncherPlugin.liClosedFolder : LauncherPlugin.liOpenFolder]);
} else {
launchItem(getSelectedItem());
}
}
});
launchTree.addTreeListener(new TreeListener() {
@Override
public void treeCollapsed(TreeEvent event) {
final TreeItem item = (TreeItem) event.item;
if (item == null) return;
item.setImage(LauncherPlugin.images[LauncherPlugin.liClosedFolder]);
}
@Override
public void treeExpanded(TreeEvent event) {
final TreeItem item = (TreeItem) event.item;
if (item == null) return;
item.setImage(LauncherPlugin.images[LauncherPlugin.liOpenFolder]);
}
});
runButton = new Button(launchGroup, SWT.PUSH);
runButton.setText(LauncherPlugin.getResourceString("view.launchButton.text"));
runButton.addSelectionListener(new SelectionListener() {
@Override
public void widgetSelected(SelectionEvent event) {
launchItem(getSelectedItem());
}
@Override
public void widgetDefaultSelected(SelectionEvent event) {
}
});
Group descriptionGroup = new Group(parent, SWT.NONE);
descriptionGroup.setText(LauncherPlugin.getResourceString("view.descriptionGroup.text"));
descriptionGroup.setLayout(new FillLayout());
descriptionText = new Text(descriptionGroup, SWT.MULTI | SWT.BORDER |
SWT.WRAP | SWT.V_SCROLL | SWT.READ_ONLY);
setDescriptionByItem(null);
setItemDescriptors(LauncherPlugin.getLaunchItemTree());
}
/**
* Called when we must grab focus.
*
* @see org.eclipse.ui.part.ViewPart#setFocus
*/
@Override
public void setFocus() {
launchTree.setFocus();
runButton.getShell().setDefaultButton(runButton);
}
/**
* Called when the View is to be disposed
*/
@Override
public void dispose() {
workbenchShell = null;
launchTree = null;
descriptionText = null;
runButton = null;
super.dispose();
}
/**
* Installs a new launch list.
*
* @param newRoot the new tree of launch items for the UI
*/
public void setItemDescriptors(final ItemTreeNode newRoot) {
if (workbenchShell == null) return;
workbenchShell.getDisplay().syncExec(new Runnable() {
@Override
public void run() {
if ((launchTree == null) || (launchTree.isDisposed())) return;
launchTree.removeAll();
for (ItemTreeNode node = newRoot.getFirstChild(); node != null;
node = node.getNextSibling()) {
doNode(node, new TreeItem(launchTree, SWT.NONE)); // top-level TreeItem
}
}
private void addGroup(TreeItem parent, ItemTreeNode node) {
for (;node != null; node = node.getNextSibling()) {
doNode(node, new TreeItem(parent, SWT.NONE)); // TreeItem at depth > 0
}
}
private void doNode(ItemTreeNode node, TreeItem treeItem) {
final ItemDescriptor item = node.getDescriptor();
treeItem.setText(item.getName());
treeItem.setData(item);
if (node.getDescriptor().isFolder()) {
treeItem.setExpanded(false);
treeItem.setImage(LauncherPlugin.images[LauncherPlugin.liClosedFolder]);
} else {
treeItem.setImage(node.getDescriptor().getIcon());
}
addGroup(treeItem, node.getFirstChild());
}
});
}
/**
* Runs the specified launch item.
*
* @param itemDescriptor the launch item to execute
*/
private void launchItem(ItemDescriptor itemDescriptor) {
/* Case 1: The launch item is a view */
String pluginViewId = itemDescriptor.getView ();
if (pluginViewId != null) {
final IWorkbenchPart workbenchPart = this;
final IWorkbenchPartSite workbenchPartSite = workbenchPart.getSite();
final IWorkbenchPage workbenchPage = workbenchPartSite.getPage();
try {
workbenchPage.showView(pluginViewId);
} catch (PartInitException e) {
LauncherPlugin.logError(LauncherPlugin.getResourceString("run.error.Invocation"), e);
}
return;
}
/* Case 2: The launch item is a standalone program */
if (workbenchShell == null) return;
try {
Object instance = itemDescriptor.createItemInstance();
if (instance != null) {
Display display = workbenchShell.getDisplay();
Method openMethod = instance.getClass().getDeclaredMethod("open", new Class[] {Display.class});
openMethod.invoke(instance, display);
}
} catch (NoSuchMethodException e) {
LauncherPlugin.logError(LauncherPlugin.getResourceString("run.error.DoesNotImplementMethod"), null);
} catch (Exception e) {
LauncherPlugin.logError(LauncherPlugin.getResourceString("run.error.CouldNotInstantiateClass"), e);
}
}
/**
* Obtains the selected launch item.
*
* @return the currently selected ItemDescriptor
*/
private ItemDescriptor getSelectedItem() {
final TreeItem[] selections = launchTree.getSelection();
if (selections.length == 0) return null;
final ItemDescriptor itemDescriptor = (ItemDescriptor) selections[0].getData();
return itemDescriptor;
}
/**
* Sets the currently visible description text to reflect that of a particular ItemDescriptor.
*
* @param itemDescriptor the launch item whose description is to be displayed, or null if none
*/
private void setDescriptionByItem(ItemDescriptor itemDescriptor) {
String description;
if (itemDescriptor == null) {
description = LauncherPlugin.getResourceString("launchitem.Null.description");
if (runButton != null) runButton.setEnabled(false);
} else {
description = itemDescriptor.getDescription();
if (description == null)
description = LauncherPlugin.getResourceString("launchitem.Missing.description");
if (runButton != null) {
runButton.setEnabled(itemDescriptor.getView() != null || itemDescriptor.getMainType() != null);
}
}
descriptionText.setText(description);
}
}
|
