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comparison flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/ZoomboxControl.java @ 546:feaf6a8881ee

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Improved the zoombox control: cancel the zoom operation if the mouse pointer leaves the chart area. flys-client/trunk@2055 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 06 Jun 2011 08:21:08 +0000
parents 9c2cf4811a7d
children f1a559d13eef
comparison
equal deleted inserted replaced
545:27fb059da15f 546:feaf6a8881ee
11 import com.smartgwt.client.widgets.Canvas; 11 import com.smartgwt.client.widgets.Canvas;
12 import com.smartgwt.client.widgets.events.MouseDownEvent; 12 import com.smartgwt.client.widgets.events.MouseDownEvent;
13 import com.smartgwt.client.widgets.events.MouseDownHandler; 13 import com.smartgwt.client.widgets.events.MouseDownHandler;
14 import com.smartgwt.client.widgets.events.MouseMoveEvent; 14 import com.smartgwt.client.widgets.events.MouseMoveEvent;
15 import com.smartgwt.client.widgets.events.MouseMoveHandler; 15 import com.smartgwt.client.widgets.events.MouseMoveHandler;
16 import com.smartgwt.client.widgets.events.MouseOutEvent;
17 import com.smartgwt.client.widgets.events.MouseOutHandler;
16 import com.smartgwt.client.widgets.events.MouseUpEvent; 18 import com.smartgwt.client.widgets.events.MouseUpEvent;
17 import com.smartgwt.client.widgets.events.MouseUpHandler; 19 import com.smartgwt.client.widgets.events.MouseUpHandler;
18 20
19 import de.intevation.flys.client.client.event.HasZoomHandlers; 21 import de.intevation.flys.client.client.event.HasZoomHandlers;
20 import de.intevation.flys.client.client.event.ZoomEvent; 22 import de.intevation.flys.client.client.event.ZoomEvent;
31 * 33 *
32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> 34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
33 */ 35 */
34 public class ZoomboxControl 36 public class ZoomboxControl
35 extends ImgButton 37 extends ImgButton
36 implements MouseDownHandler, MouseUpHandler, MouseMoveHandler, HasZoomHandlers 38 implements MouseDownHandler, MouseUpHandler, MouseMoveHandler, HasZoomHandlers,
39 MouseOutHandler
37 { 40 {
38 protected List<ZoomHandler> handlers; 41 protected List<ZoomHandler> handlers;
39 42
40 protected ChartOutputTab chartTab; 43 protected ChartOutputTab chartTab;
41 44
62 setSize(20); 65 setSize(20);
63 setShowRollOver(false); 66 setShowRollOver(false);
64 setSelected(false); 67 setSelected(false);
65 68
66 chartTab.getChartPanel().addMouseDownHandler(this); 69 chartTab.getChartPanel().addMouseDownHandler(this);
70 chartTab.getChartPanel().addMouseOutHandler(this);
67 chartTab.getChartPanel().addMouseMoveHandler(this); 71 chartTab.getChartPanel().addMouseMoveHandler(this);
68 chartTab.getChartPanel().addMouseUpHandler(this); 72 chartTab.getChartPanel().addMouseUpHandler(this);
69 } 73 }
70 74
71 75
112 start[1] = getRelativeY(event.getY()); 116 start[1] = getRelativeY(event.getY());
113 117
114 end[0] = start[0]; 118 end[0] = start[0];
115 end[1] = start[1]; 119 end[1] = start[1];
116 120
117 chartTab.getChartPanel().addChild(zoombox); 121 Canvas c = getChartPanel();
122 c.addChild(zoombox);
118 123
119 positionZoombox(); 124 positionZoombox();
120 } 125 }
121 126
122 127
156 end[1] = getRelativeY(event.getY()); 161 end[1] = getRelativeY(event.getY());
157 162
158 fireZoomEvent(); 163 fireZoomEvent();
159 164
160 clearZoombox(); 165 clearZoombox();
161 166 }
162 chartTab.getChartPanel().removeChild(zoombox); 167
168
169 /**
170 * The mouse out event is used to cancel an active zoom operation.
171 *
172 * @param event The mouse out event.
173 */
174 public void onMouseOut(MouseOutEvent event) {
175 if (!isSelected() || !isMouseOut(event.getX(), event.getY())) {
176 return;
177 }
178
179 start[0] = 0;
180 start[1] = 0;
181 end[0] = 0;
182 end[1] = 0;
183
184 clearZoombox();
185 }
186
187
188 /**
189 * Returns the chart panel.
190 *
191 * @return the chart panel.
192 */
193 protected Canvas getChartPanel() {
194 return chartTab.getChartPanel();
195 }
196
197
198 /**
199 * This method is required to check manually if the mouse pointer really
200 * moves out the chart area. The MouseOutEvent is also fired if the mouse
201 * goes down which doesn't seem to be correct. So, we gonna check this
202 * manually.
203 *
204 * @param x The x coordinate.
205 * @param y The y coordinate.
206 *
207 * @return true, if the mouse is really out of the chart area, otherwise
208 * false.
209 */
210 protected boolean isMouseOut(int x, int y) {
211 Canvas chart = getChartPanel();
212
213 int left = chart.getPageLeft();
214 int right = chart.getPageRight();
215 int top = chart.getPageTop();
216 int bottom = chart.getPageBottom();
217
218 if (x <= left || x >= right || y <= top || y >= bottom) {
219 return true;
220 }
221
222 return false;
163 } 223 }
164 224
165 225
166 /** 226 /**
167 * Returns the X coordinate relative to the left border. 227 * Returns the X coordinate relative to the left border.
223 protected void clearZoombox() { 283 protected void clearZoombox() {
224 zoombox.setLeft(0); 284 zoombox.setLeft(0);
225 zoombox.setTop(0); 285 zoombox.setTop(0);
226 zoombox.setWidth(0); 286 zoombox.setWidth(0);
227 zoombox.setHeight(0); 287 zoombox.setHeight(0);
288
289 Canvas c = getChartPanel();
290 c.removeChild(zoombox);
228 } 291 }
229 292
230 293
231 /** 294 /**
232 * Fires a ZoomEvent to all registered listeners. 295 * Fires a ZoomEvent to all registered listeners.
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