Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: ab548bafd9ec2cb3b87b7d91b3e1de42c044312a (plain) (blame)
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
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
/*******************************************************************************
 * Copyright (c) 2000, 2018 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.externaltools.internal.ui;


import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.ui.views.navigator.ResourceComparator;

/**
 * This class was derived from org.eclipse.ui.internal.misc.CheckboxTreeAndListGroup
 *
 */
public class TreeAndListGroup implements ISelectionChangedListener {
	private Object root;
	private Object currentTreeSelection;
	private List<ISelectionChangedListener> selectionChangedListeners = new ArrayList<>();
	private List<IDoubleClickListener> doubleClickListeners = new ArrayList<>();

	private ITreeContentProvider treeContentProvider;
	private IStructuredContentProvider listContentProvider;
	private ILabelProvider treeLabelProvider;
	private ILabelProvider listLabelProvider;

	// widgets
	private TreeViewer treeViewer;
	private TableViewer listViewer;
	private boolean allowMultiselection= false;

	/**
	 *	Create an instance of this class.  Use this constructor if you wish to specify
	 *	the width and/or height of the combined widget (to only hardcode one of the
	 *	sizing dimensions, specify the other dimension's value as -1)
	 *
	 *	@param parent org.eclipse.swt.widgets.Composite
	 *	@param style int
	 *  @param rootObject java.lang.Object
	 *	@param width int
	 *	@param height int
	 *  @param allowMultiselection Whether to allow multi-selection in the list viewer.
	 */
	public TreeAndListGroup(Composite parent, Object rootObject, ITreeContentProvider treeContentProvider, ILabelProvider treeLabelProvider, IStructuredContentProvider listContentProvider, ILabelProvider listLabelProvider, int style, int width, int height, boolean allowMultiselection) {

		root = rootObject;
		this.treeContentProvider = treeContentProvider;
		this.listContentProvider = listContentProvider;
		this.treeLabelProvider = treeLabelProvider;
		this.listLabelProvider = listLabelProvider;
		this.allowMultiselection= allowMultiselection;
		createContents(parent, width, height, style);
	}
	/**
	 * This method must be called just before this window becomes visible.
	 */
	public void aboutToOpen() {
		currentTreeSelection = null;

		//select the first element in the list
		Object[] elements = treeContentProvider.getElements(root);
		Object primary = elements.length > 0 ? elements[0] : null;
		if (primary != null) {
			treeViewer.setSelection(new StructuredSelection(primary));
		}
		treeViewer.getControl().setFocus();
	}
	/**
	 *	Add the passed listener to collection of clients
	 *	that listen for changes to list viewer selection state
	 *
	 *	@param listener ISelectionChangedListener
	 */
	public void addSelectionChangedListener(ISelectionChangedListener listener) {
		selectionChangedListeners.add(listener);
	}

	/**
	 * Add the given listener to the collection of clients that listen to
	 * double-click events in the list viewer
	 *
	 * @param listener IDoubleClickListener
	 */
	public void addDoubleClickListener(IDoubleClickListener listener) {
		doubleClickListeners.add(listener);
	}

	/**
	 * Notify all selection listeners that a selection has occurred in the list
	 * viewer
	 */
	protected void notifySelectionListeners(SelectionChangedEvent event) {
		for (ISelectionChangedListener listener : selectionChangedListeners) {
			listener.selectionChanged(event);
		}
	}

	/**
	 * Notify all double click listeners that a double click event has occurred
	 * in the list viewer
	 */
	protected void notifyDoubleClickListeners(DoubleClickEvent event) {
		for (IDoubleClickListener listener : doubleClickListeners) {
			listener.doubleClick(event);
		}
	}

	/**
	 *	Lay out and initialize self's visual components.
	 *
	 *	@param parent org.eclipse.swt.widgets.Composite
	 *	@param width int
	 *	@param height int
	 */
	protected void createContents(Composite parent, int width, int height, int style) {
		// group pane
		Composite composite = new Composite(parent, style);
		composite.setFont(parent.getFont());
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.makeColumnsEqualWidth = true;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		composite.setLayout(layout);
		composite.setLayoutData(new GridData(GridData.FILL_BOTH));

		createTreeViewer(composite, width / 2, height);
		createListViewer(composite, width / 2, height);

		initialize();
	}
	/**
	 *	Create this group's list viewer.
	 */
	protected void createListViewer(Composite parent, int width, int height) {
		int style;
		if (allowMultiselection) {
			style= SWT.MULTI;
		} else {
			style= SWT.SINGLE;
		}
		listViewer = new TableViewer(parent, SWT.BORDER | style);
		GridData data = new GridData(GridData.FILL_BOTH);
		data.widthHint = width;
		data.heightHint = height;
		listViewer.getTable().setLayoutData(data);
		listViewer.getTable().setFont(parent.getFont());
		listViewer.setContentProvider(listContentProvider);
		listViewer.setLabelProvider(listLabelProvider);
		listViewer.setComparator(new ResourceComparator(ResourceComparator.NAME));
		listViewer.addSelectionChangedListener(this::notifySelectionListeners);
		listViewer.addDoubleClickListener(event -> {
			if (!event.getSelection().isEmpty()) {
				notifyDoubleClickListeners(event);
			}
		});
	}
	/**
	 *	Create this group's tree viewer.
	 */
	protected void createTreeViewer(Composite parent, int width, int height) {
		Tree tree = new Tree(parent, SWT.BORDER);
		GridData data = new GridData(GridData.FILL_BOTH);
		data.widthHint = width;
		data.heightHint = height;
		tree.setLayoutData(data);
		tree.setFont(parent.getFont());

		treeViewer = new TreeViewer(tree);
		treeViewer.setContentProvider(treeContentProvider);
		treeViewer.setLabelProvider(treeLabelProvider);
		treeViewer.setComparator(new ResourceComparator(ResourceComparator.NAME));
		treeViewer.addSelectionChangedListener(this);
	}

	public Table getListTable() {
		return listViewer.getTable();
	}

	public IStructuredSelection getListTableSelection() {
		ISelection selection=  this.listViewer.getSelection();
		if (selection instanceof IStructuredSelection) {
			return (IStructuredSelection)selection;
		}
		return StructuredSelection.EMPTY;
	}

	protected void initialListItem(Object element) {
		Object parent = treeContentProvider.getParent(element);
		selectAndRevealFolder(parent);
	}

	public void selectAndRevealFolder(Object treeElement) {
		treeViewer.reveal(treeElement);
		IStructuredSelection selection = new StructuredSelection(treeElement);
		treeViewer.setSelection(selection);
	}

	public void selectAndRevealFile(Object treeElement) {
		listViewer.reveal(treeElement);
		IStructuredSelection selection = new StructuredSelection(treeElement);
		listViewer.setSelection(selection);
	}

	/**
	 *	Initialize this group's viewers after they have been laid out.
	 */
	protected void initialize() {
		treeViewer.setInput(root);
	}

	@Override
	public void selectionChanged(SelectionChangedEvent event) {
		IStructuredSelection selection = event.getStructuredSelection();
		Object selectedElement = selection.getFirstElement();
		if (selectedElement == null) {
			currentTreeSelection = null;
			listViewer.setInput(currentTreeSelection);
			return;
		}

		// ie.- if not an item deselection
		if (selectedElement != currentTreeSelection) {
			listViewer.setInput(selectedElement);
		}

		currentTreeSelection = selectedElement;
	}
	/**
	 *	Set the list viewer's providers to those passed
	 *
	 *	@param contentProvider ITreeContentProvider
	 *	@param labelProvider ILabelProvider
	 */
	public void setListProviders(IStructuredContentProvider contentProvider, ILabelProvider labelProvider) {
		listViewer.setContentProvider(contentProvider);
		listViewer.setLabelProvider(labelProvider);
	}
	/**
	 *	Set the sorter that is to be applied to self's list viewer
	 */
	public void setListSorter(ViewerComparator comparator) {
		listViewer.setComparator(comparator);
	}
	/**
	 * Set the root of the widget to be new Root. Regenerate all of the tables and lists from this
	 * value.
	 * @param newRoot
	 */
	public void setRoot(Object newRoot) {
		root = newRoot;
		initialize();
	}

	/**
	 *	Set the tree viewer's providers to those passed
	 *
	 *	@param contentProvider ITreeContentProvider
	 *	@param labelProvider ILabelProvider
	 */
	public void setTreeProviders(ITreeContentProvider contentProvider, ILabelProvider labelProvider) {
		treeViewer.setContentProvider(contentProvider);
		treeViewer.setLabelProvider(labelProvider);
	}
	/**
	 *	Set the comparator that is to be applied to self's tree viewer
	 */
	public void setTreeComparator(ViewerComparator comparator) {
		treeViewer.setComparator(comparator);
	}

	/**
	 * Set the focus on to the list widget.
	 */
	public void setFocus() {
		treeViewer.getTree().setFocus();
	}
}

Back to the top