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1
27
28 package org.nightlabs.editor2d.tools;
29
30 import org.eclipse.draw2d.ColorConstants;
31 import org.eclipse.draw2d.Figure;
32 import org.eclipse.draw2d.Graphics;
33 import org.eclipse.draw2d.IFigure;
34 import org.eclipse.draw2d.geometry.Rectangle;
35 import org.eclipse.gef.EditPartViewer;
36 import org.eclipse.gef.GraphicalViewer;
37 import org.eclipse.gef.SharedCursors;
38 import org.eclipse.gef.editparts.ScalableFreeformRootEditPart;
39 import org.eclipse.gef.editparts.ScalableRootEditPart;
40 import org.eclipse.gef.editparts.ZoomManager;
41 import org.eclipse.gef.tools.AbstractTool;
42 import org.eclipse.swt.widgets.Display;
43
44 import org.nightlabs.editor2d.request.EditorRequestConstants;
45 import org.nightlabs.editor2d.util.EditorUtil;
46
47
48 public class ZoomTool
49 extends AbstractTool
50 implements EditorRequestConstants
51 {
52 protected IFigure zoomRectangleFigure;
53
54 protected ZoomManager zoomManager;
55
56 public ZoomTool()
57 {
58 setDefaultCursor(SharedCursors.CROSS);
59 }
60
61 protected String  getCommandName()
62 {
63 return REQ_ZOOM_RECT;
64 }
65
66 private void eraseZoomFeedback()
67 {
68 if (zoomRectangleFigure != null) {
69 removeFeedback(zoomRectangleFigure);
70 zoomRectangleFigure = null;
71 }
72 }
73
74
77 public void deactivate()
78 {
79 if (isInState(STATE_DRAG_IN_PROGRESS)) {
80 eraseZoomFeedback();
81 }
82 super.deactivate();
83 setState(STATE_TERMINAL);
84 }
85
86
89 protected String getDebugName()
90 {
91 return "Zoom Tool"; }
93
94 protected IFigure getZoomFeedbackFigure()
95 {
96 if (zoomRectangleFigure == null) {
97 zoomRectangleFigure = new ZoomRectangleFigure();
98 addFeedback(zoomRectangleFigure);
99 }
100 return zoomRectangleFigure;
101 }
102
103 protected Rectangle getZoomSelectionRectangle()
104 {
105 return new Rectangle(getStartLocation(), getLocation());
106 }
107
108 protected ZoomManager getZoomManager()
109 {
110 if (getCurrentViewer().getContents().getRoot() instanceof ScalableRootEditPart)
111 {
112 if (zoomManager == null) {
113 zoomManager = ((ScalableRootEditPart) getCurrentViewer().getContents().getRoot()).getZoomManager();
114 }
115 return zoomManager;
116 }
117 else if (getCurrentViewer().getContents().getRoot() instanceof ScalableFreeformRootEditPart)
118 {
119 if (zoomManager == null) {
120 zoomManager = ((ScalableFreeformRootEditPart) getCurrentViewer().getContents().getRoot()).getZoomManager();
121 }
122 return zoomManager;
123 }
124 return null;
125 }
126
127 protected boolean isGraphicalViewer()
128 {
129 return getCurrentViewer() instanceof GraphicalViewer;
130 }
131
132
135 protected boolean handleButtonDown(int button)
136 {
137 if (!isGraphicalViewer())
138 return true;
139 if (button != 1) {
140 setState(STATE_INVALID);
141 handleInvalidInput();
142 }
143 if (stateTransition(STATE_INITIAL, STATE_DRAG_IN_PROGRESS))
144 {
145 }
151 return true;
152 }
153
154
157 protected boolean handleButtonUp(int button)
158 {
159 if (stateTransition(STATE_DRAG_IN_PROGRESS, STATE_TERMINAL)) {
160 eraseZoomFeedback();
161 performZoom();
162 }
163 handleFinished();
164 return true;
165 }
166
167
170 protected boolean handleDragInProgress()
171 {
172 if (isInState(STATE_DRAG | STATE_DRAG_IN_PROGRESS)) {
173 showZoomFeedback();
174 }
175 return true;
176 }
177
178
181 protected boolean handleFocusLost()
182 {
183 if (isInState(STATE_DRAG | STATE_DRAG_IN_PROGRESS)) {
184 handleFinished();
185 return true;
186 }
187 return false;
188 }
189
190
194 protected boolean handleInvalidInput()
195 {
196 eraseZoomFeedback();
197 return true;
198 }
199
200
203 public void setViewer(EditPartViewer viewer)
204 {
205 if (viewer == getCurrentViewer())
206 return;
207 super.setViewer(viewer);
208 if (viewer instanceof GraphicalViewer)
209 setDefaultCursor(SharedCursors.CROSS);
210 else
211 setDefaultCursor(SharedCursors.NO);
212 }
213
214 protected void performZoom()
215 {
216 EditorUtil.zoomToAbsoluteRect(getZoomSelectionRectangle().getCopy(), getZoomManager());
218 }
219
220 protected void showZoomFeedback()
221 {
222 Rectangle rect = getZoomSelectionRectangle().getCopy();
223 getZoomFeedbackFigure().translateToRelative(rect);
224 getZoomFeedbackFigure().setBounds(rect);
225 }
226
227 class ZoomRectangleFigure
228 extends Figure
229 {
230 private int offset = 0;
231 private boolean schedulePaint = true;
232 private static final int DELAY = 110;
234
237 protected void paintFigure(Graphics graphics)
238 {
239 Rectangle bounds = getBounds().getCopy();
240 graphics.translate(getLocation());
241
242 graphics.setXORMode(true);
243 graphics.setForegroundColor(ColorConstants.white);
244 graphics.setBackgroundColor(ColorConstants.black);
245
246 graphics.setLineStyle(Graphics.LINE_DOT);
247
248 int[] points = new int[6];
249
250 points[0] = 0 + offset;
251 points[1] = 0;
252 points[2] = bounds.width - 1;
253 points[3] = 0;
254 points[4] = bounds.width - 1;
255 points[5] = bounds.height - 1;
256
257 graphics.drawPolyline(points);
258
259 points[0] = 0;
260 points[1] = 0 + offset;
261 points[2] = 0;
262 points[3] = bounds.height - 1;
263 points[4] = bounds.width - 1;
264 points[5] = bounds.height - 1;
265
266 graphics.drawPolyline(points);
267
268 graphics.translate(getLocation().getNegated());
269
270 if (schedulePaint) {
271 Display.getCurrent().timerExec(DELAY, new Runnable () {
272 public void run() {
273 offset++;
274 if (offset > 5)
275 offset = 0;
276
277 schedulePaint = true;
278 repaint();
279 }
280 });
281 }
282
283 schedulePaint = false;
284 }
285
286 }
288 }
289 |
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