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1
11 package org.eclipse.ui.internal;
12
13 import org.eclipse.jface.action.ContributionItem;
14 import org.eclipse.jface.preference.IPreferenceStore;
15 import org.eclipse.jface.resource.ImageDescriptor;
16 import org.eclipse.osgi.util.NLS;
17 import org.eclipse.swt.SWT;
18 import org.eclipse.swt.events.SelectionAdapter;
19 import org.eclipse.swt.events.SelectionEvent;
20 import org.eclipse.swt.graphics.GC;
21 import org.eclipse.swt.graphics.Image;
22 import org.eclipse.swt.widgets.ToolBar;
23 import org.eclipse.swt.widgets.ToolItem;
24 import org.eclipse.ui.IPerspectiveDescriptor;
25 import org.eclipse.ui.IWorkbenchPage;
26 import org.eclipse.ui.IWorkbenchPreferenceConstants;
27 import org.eclipse.ui.internal.util.PrefUtil;
28
29
33 public class PerspectiveBarContributionItem extends ContributionItem {
34
35 private IPerspectiveDescriptor perspective;
36
37 private IPreferenceStore apiPreferenceStore = PrefUtil
38 .getAPIPreferenceStore();
39
40 private ToolItem toolItem = null;
41
42 private Image image;
43
44 private IWorkbenchPage workbenchPage;
45
46
52 public PerspectiveBarContributionItem(IPerspectiveDescriptor perspective,
53 IWorkbenchPage workbenchPage) {
54 super(perspective.getId());
55 this.perspective = perspective;
56 this.workbenchPage = workbenchPage;
57 }
58
59
62 public void dispose() {
63 super.dispose();
64 if (image != null && !image.isDisposed()) {
65 image.dispose();
66 image = null;
67 }
68 apiPreferenceStore = null;
69 workbenchPage = null;
70 perspective = null;
71
72 }
73
74 public void fill(ToolBar parent, int index) {
75 if (toolItem == null && parent != null && !parent.isDisposed()) {
76
77 if (index >= 0) {
78 toolItem = new ToolItem(parent, SWT.CHECK, index);
79 } else {
80 toolItem = new ToolItem(parent, SWT.CHECK);
81 }
82
83 if (image == null || image.isDisposed()) {
84 createImage();
85 }
86 toolItem.setImage(image);
87
88 toolItem.setToolTipText(NLS.bind(WorkbenchMessages.PerspectiveBarContributionItem_toolTip, perspective.getLabel()));
89 toolItem.addSelectionListener(new SelectionAdapter() {
90
91 public void widgetSelected(SelectionEvent event) {
92 select();
93 }
94 });
95 toolItem.setData(this); update();
97 }
98 }
99
100 private void createImage() {
101 ImageDescriptor imageDescriptor = perspective.getImageDescriptor();
102 if (imageDescriptor != null) {
103 image = imageDescriptor.createImage();
104 } else {
105 image = WorkbenchImages.getImageDescriptor(
106 IWorkbenchGraphicConstants.IMG_ETOOL_DEF_PERSPECTIVE)
107 .createImage();
108 }
109 }
110
111 Image getImage() {
112 if (image == null) {
113 createImage();
114 }
115 return image;
116 }
117
118
121 public void select() {
122 if (workbenchPage.getPerspective() != perspective) {
123 workbenchPage.setPerspective(perspective);
124 } else {
125 toolItem.setSelection(true);
126 }
127 }
128
129 public void update() {
130 if (toolItem != null && !toolItem.isDisposed()) {
131 toolItem
132 .setSelection(workbenchPage.getPerspective() == perspective);
133 if (apiPreferenceStore
134 .getBoolean(IWorkbenchPreferenceConstants.SHOW_TEXT_ON_PERSPECTIVE_BAR)) {
135 if (apiPreferenceStore.getString(
136 IWorkbenchPreferenceConstants.DOCK_PERSPECTIVE_BAR)
137 .equals(IWorkbenchPreferenceConstants.TOP_LEFT)) {
138 toolItem.setText(perspective.getLabel());
139 } else {
140 toolItem.setText(shortenText(perspective.getLabel(),
141 toolItem));
142 }
143 } else {
144 toolItem.setText(""); }
146 }
147 }
148
149
153 public void update(IPerspectiveDescriptor newDesc) {
154 perspective = newDesc;
155 if (toolItem != null && !toolItem.isDisposed()) {
156 ImageDescriptor imageDescriptor = perspective.getImageDescriptor();
157 if (imageDescriptor != null) {
158 toolItem.setImage(imageDescriptor.createImage());
159 } else {
160 toolItem.setImage(WorkbenchImages.getImageDescriptor(
161 IWorkbenchGraphicConstants.IMG_ETOOL_DEF_PERSPECTIVE)
162 .createImage());
163 }
164 toolItem.setToolTipText(NLS.bind(WorkbenchMessages.PerspectiveBarContributionItem_toolTip, perspective.getLabel() ));
165 }
166 update();
167 }
168
169 IWorkbenchPage getPage() {
170 return workbenchPage;
171 }
172
173 IPerspectiveDescriptor getPerspective() {
174 return perspective;
175 }
176
177 ToolItem getToolItem() {
178 return toolItem;
179 }
180
181
189 public boolean handles(IPerspectiveDescriptor perspective,
190 IWorkbenchPage workbenchPage) {
191 return this.perspective == perspective
192 && this.workbenchPage == workbenchPage;
193 }
194
195
199 public void setPerspective(IPerspectiveDescriptor newPerspective) {
200 this.perspective = newPerspective;
201 }
202
203 void setSelection(boolean b) {
205 if (toolItem != null && !toolItem.isDisposed()) {
206 toolItem.setSelection(b);
207 }
208 }
209
210 static int getMaxWidth(Image image) {
211 return image.getBounds().width * 5;
212 }
213
214 private static final String  ellipsis = "...";
216 protected String shortenText(String textValue, ToolItem item) {
217 if (textValue == null || toolItem == null || toolItem.isDisposed()) {
218 return null;
219 }
220 String returnText = textValue;
221 GC gc = new GC(item.getParent());
222 int maxWidth = getMaxWidth(item.getImage());
223 if (gc.textExtent(textValue).x >= maxWidth) {
224 for (int i = textValue.length(); i > 0; i--) {
225 String test = textValue.substring(0, i);
226 test = test + ellipsis;
227 if (gc.textExtent(test).x < maxWidth) {
228 returnText = test;
229 break;
230 }
231 }
232 }
233 gc.dispose();
234 return returnText;
235 }
236 }
237 |
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