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1
11 package org.eclipse.ui.internal.progress;
12
13 import java.util.ArrayList  ;
14 import java.util.List ;
15
16 import org.eclipse.core.runtime.Assert;
17 import org.eclipse.jface.resource.JFaceResources;
18 import org.eclipse.jface.viewers.IBaseLabelProvider;
19 import org.eclipse.jface.viewers.ILabelProvider;
20 import org.eclipse.swt.SWT;
21 import org.eclipse.swt.events.DisposeEvent;
22 import org.eclipse.swt.events.DisposeListener;
23 import org.eclipse.swt.events.PaintEvent;
24 import org.eclipse.swt.events.PaintListener;
25 import org.eclipse.swt.graphics.FontMetrics;
26 import org.eclipse.swt.graphics.GC;
27 import org.eclipse.swt.graphics.Point;
28 import org.eclipse.swt.graphics.Rectangle;
29 import org.eclipse.swt.graphics.Transform;
30 import org.eclipse.swt.widgets.Canvas;
31 import org.eclipse.swt.widgets.Composite;
32 import org.eclipse.swt.widgets.Control;
33 import org.eclipse.swt.widgets.Display;
34 import org.eclipse.swt.widgets.Widget;
35 import org.eclipse.ui.internal.TrimUtil;
36
37
41 public class ProgressCanvasViewer extends AbstractProgressViewer {
42 Canvas canvas;
43
44 Object [] displayedItems = new Object [0];
45
46 private final static List EMPTY_LIST = new ArrayList ();
47
48
51 private FontMetrics fontMetrics;
52
53 private int numShowItems = 1;
54
55 private int maxCharacterWidth;
56
57 private int orientation = SWT.HORIZONTAL;
58
59
68 ProgressCanvasViewer(Composite parent, int style, int itemsToShow, int numChars, int orientation) {
69 super();
70 this.orientation = orientation;
71 numShowItems = itemsToShow;
72 maxCharacterWidth = numChars;
73 canvas = new Canvas(parent, style);
74 hookControl(canvas);
75 GC gc = new GC(canvas);
77 gc.setFont(JFaceResources.getDefaultFont());
78 fontMetrics = gc.getFontMetrics();
79 gc.dispose();
80 initializeListeners();
81 }
82
83
90 protected void hookControl(Control control) {
91 control.addDisposeListener(new DisposeListener() {
92 public void widgetDisposed(DisposeEvent event) {
93 handleDispose(event);
94 }
95 });
96 }
97
98
103 protected Widget doFindInputItem(Object element) {
104 return null; }
106
107
112 protected Widget doFindItem(Object element) {
113 return null; }
115
116
122 protected void doUpdateItem(Widget item, Object element, boolean fullMap) {
123 canvas.redraw();
124 }
125
126
131 protected List getSelectionFromWidget() {
132 return EMPTY_LIST;
134 }
135
136
141 protected void internalRefresh(Object element) {
142 displayedItems = getSortedChildren(getRoot());
143 canvas.redraw();
144 }
145
146
151 public void reveal(Object element) {
152 }
154
155
161 protected void setSelectionToWidget(List l, boolean reveal) {
162 }
164
165
170 public Control getControl() {
171 return canvas;
172 }
173
174 private void initializeListeners() {
175 canvas.addPaintListener(new PaintListener() {
176
181 public void paintControl(PaintEvent event) {
182
183 GC gc = event.gc;
184 Transform transform = null;
185 if (orientation == SWT.VERTICAL) {
186 transform = new Transform(event.display);
187 transform.translate(TrimUtil.TRIM_DEFAULT_HEIGHT, 0);
188 transform.rotate(90);
189 }
190 ILabelProvider labelProvider = (ILabelProvider) getLabelProvider();
191
192 int itemCount = Math.min(displayedItems.length, numShowItems);
193
194 int yOffset = 0;
195 int xOffset = 0;
196 if (numShowItems == 1) { Rectangle clientArea = canvas.getParent().getClientArea();
198 if (orientation == SWT.HORIZONTAL) {
199 int size = clientArea.height;
200 yOffset = size - (fontMetrics.getHeight());
201 yOffset = yOffset / 2;
202 } else {
203 int size = clientArea.width;
204 xOffset = size - (fontMetrics.getHeight());
205 xOffset = xOffset / 2;
206 }
207 }
208
209 for (int i = 0; i < itemCount; i++) {
210 String string = labelProvider.getText(displayedItems[i]);
211 if(string == null) {
212 string = ""; }
214 if (orientation == SWT.HORIZONTAL) {
215 gc.drawString(string, 2, yOffset + (i * fontMetrics.getHeight()), true);
216 } else {
217 gc.setTransform(transform);
218 gc.drawString(string, xOffset + (i * fontMetrics.getHeight()), 2, true);
219 }
220 }
221 if (transform != null)
222 transform.dispose();
223 }
224 });
225 }
226
227
230 public void setLabelProvider(IBaseLabelProvider labelProvider) {
231 Assert.isTrue(labelProvider instanceof ILabelProvider);
232 super.setLabelProvider(labelProvider);
233 }
234
235
240 public Point getSizeHints() {
241
242 Display display = canvas.getDisplay();
243
244 GC gc = new GC(canvas);
245 FontMetrics fm = gc.getFontMetrics();
246 int charWidth = fm.getAverageCharWidth();
247 int charHeight = fm.getHeight();
248 int maxWidth = display.getBounds().width / 2;
249 int maxHeight = display.getBounds().height / 6;
250 int fontWidth = charWidth * maxCharacterWidth;
251 int fontHeight = charHeight * numShowItems;
252 if (maxWidth < fontWidth) {
253 fontWidth = maxWidth;
254 }
255 if (maxHeight < fontHeight) {
256 fontHeight = maxHeight;
257 }
258 gc.dispose();
259 return new Point(fontWidth, fontHeight);
260 }
261
262
265 public void add(Object [] elements) {
266 refresh(true);
267
268 }
269
270
273 public void remove(Object [] elements) {
274 refresh(true);
275
276 }
277
278
279 }
280 |
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