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1
8 package com.nightlabs.editor2d.tools;
9
10 import org.eclipse.draw2d.ColorConstants;
11 import org.eclipse.draw2d.Figure;
12 import org.eclipse.draw2d.Graphics;
13 import org.eclipse.draw2d.IFigure;
14 import org.eclipse.draw2d.geometry.Rectangle;
15 import org.eclipse.gef.EditPartViewer;
16 import org.eclipse.gef.GraphicalViewer;
17 import org.eclipse.gef.SharedCursors;
18 import org.eclipse.gef.editparts.ScalableFreeformRootEditPart;
19 import org.eclipse.gef.editparts.ScalableRootEditPart;
20 import org.eclipse.gef.editparts.ZoomManager;
21 import org.eclipse.gef.tools.AbstractTool;
22 import org.eclipse.swt.widgets.Display;
23
24 import com.nightlabs.editor2d.request.EditorRequestConstants;
25 import com.nightlabs.editor2d.util.EditorUtil;
26
27
28 public class ZoomTool
29 extends AbstractTool
30 implements EditorRequestConstants
31 {
32 protected IFigure zoomRectangleFigure;
33
34 protected ZoomManager zoomManager;
35
36 public ZoomTool()
37 {
38 setDefaultCursor(SharedCursors.CROSS);
39 }
40
41 protected String  getCommandName()
42 {
43 return REQ_ZOOM_RECT;
44 }
45
46 private void eraseZoomFeedback()
47 {
48 if (zoomRectangleFigure != null) {
49 removeFeedback(zoomRectangleFigure);
50 zoomRectangleFigure = null;
51 }
52 }
53
54
57 public void deactivate()
58 {
59 if (isInState(STATE_DRAG_IN_PROGRESS)) {
60 eraseZoomFeedback();
61 }
62 super.deactivate();
63 setState(STATE_TERMINAL);
64 }
65
66
69 protected String getDebugName()
70 {
71 return "Zoom Tool"; }
73
74 protected IFigure getZoomFeedbackFigure()
75 {
76 if (zoomRectangleFigure == null) {
77 zoomRectangleFigure = new ZoomRectangleFigure();
78 addFeedback(zoomRectangleFigure);
79 }
80 return zoomRectangleFigure;
81 }
82
83 protected Rectangle getZoomSelectionRectangle()
84 {
85 return new Rectangle(getStartLocation(), getLocation());
86 }
87
88 protected ZoomManager getZoomManager()
89 {
90 if (getCurrentViewer().getContents().getRoot() instanceof ScalableRootEditPart)
91 {
92 if (zoomManager == null) {
93 zoomManager = ((ScalableRootEditPart) getCurrentViewer().getContents().getRoot()).getZoomManager();
94 }
95 return zoomManager;
96 }
97 else if (getCurrentViewer().getContents().getRoot() instanceof ScalableFreeformRootEditPart)
98 {
99 if (zoomManager == null) {
100 zoomManager = ((ScalableFreeformRootEditPart) getCurrentViewer().getContents().getRoot()).getZoomManager();
101 }
102 return zoomManager;
103 }
104 return null;
105 }
106
107 protected boolean isGraphicalViewer()
108 {
109 return getCurrentViewer() instanceof GraphicalViewer;
110 }
111
112
115 protected boolean handleButtonDown(int button)
116 {
117 if (!isGraphicalViewer())
118 return true;
119 if (button != 1) {
120 setState(STATE_INVALID);
121 handleInvalidInput();
122 }
123 if (stateTransition(STATE_INITIAL, STATE_DRAG_IN_PROGRESS))
124 {
125 }
131 return true;
132 }
133
134
137 protected boolean handleButtonUp(int button)
138 {
139 if (stateTransition(STATE_DRAG_IN_PROGRESS, STATE_TERMINAL)) {
140 eraseZoomFeedback();
141 performZoom();
142 }
143 handleFinished();
144 return true;
145 }
146
147
150 protected boolean handleDragInProgress()
151 {
152 if (isInState(STATE_DRAG | STATE_DRAG_IN_PROGRESS)) {
153 showZoomFeedback();
154 }
155 return true;
156 }
157
158
161 protected boolean handleFocusLost()
162 {
163 if (isInState(STATE_DRAG | STATE_DRAG_IN_PROGRESS)) {
164 handleFinished();
165 return true;
166 }
167 return false;
168 }
169
170
174 protected boolean handleInvalidInput()
175 {
176 eraseZoomFeedback();
177 return true;
178 }
179
180
183 public void setViewer(EditPartViewer viewer)
184 {
185 if (viewer == getCurrentViewer())
186 return;
187 super.setViewer(viewer);
188 if (viewer instanceof GraphicalViewer)
189 setDefaultCursor(SharedCursors.CROSS);
190 else
191 setDefaultCursor(SharedCursors.NO);
192 }
193
194 protected void performZoom()
195 {
196 EditorUtil.zoomToAbsoluteRect(getZoomSelectionRectangle().getCopy(), getZoomManager());
198 }
199
200 protected void showZoomFeedback()
201 {
202 Rectangle rect = getZoomSelectionRectangle().getCopy();
203 getZoomFeedbackFigure().translateToRelative(rect);
204 getZoomFeedbackFigure().setBounds(rect);
205 }
206
207 class ZoomRectangleFigure
208 extends Figure
209 {
210 private int offset = 0;
211 private boolean schedulePaint = true;
212 private static final int DELAY = 110;
214
217 protected void paintFigure(Graphics graphics)
218 {
219 Rectangle bounds = getBounds().getCopy();
220 graphics.translate(getLocation());
221
222 graphics.setXORMode(true);
223 graphics.setForegroundColor(ColorConstants.white);
224 graphics.setBackgroundColor(ColorConstants.black);
225
226 graphics.setLineStyle(Graphics.LINE_DOT);
227
228 int[] points = new int[6];
229
230 points[0] = 0 + offset;
231 points[1] = 0;
232 points[2] = bounds.width - 1;
233 points[3] = 0;
234 points[4] = bounds.width - 1;
235 points[5] = bounds.height - 1;
236
237 graphics.drawPolyline(points);
238
239 points[0] = 0;
240 points[1] = 0 + offset;
241 points[2] = 0;
242 points[3] = bounds.height - 1;
243 points[4] = bounds.width - 1;
244 points[5] = bounds.height - 1;
245
246 graphics.drawPolyline(points);
247
248 graphics.translate(getLocation().getNegated());
249
250 if (schedulePaint) {
251 Display.getCurrent().timerExec(DELAY, new Runnable () {
252 public void run() {
253 offset++;
254 if (offset > 5)
255 offset = 0;
256
257 schedulePaint = true;
258 repaint();
259 }
260 });
261 }
262
263 schedulePaint = false;
264 }
265
266 }
268 }
269
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