/[schmitzm]/branches/2.0-RC2/src/skrueger/geotools/XMapPaneAction_Zoom.java
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Contents of /branches/2.0-RC2/src/skrueger/geotools/XMapPaneAction_Zoom.java

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Revision 654 - (show annotations)
Mon Feb 1 18:13:14 2010 UTC (15 years, 1 month ago) by alfonx
File MIME type: text/plain
File size: 8715 byte(s) 
* GP-Cleanup: Moved SelectionTOol to new XMapTool concept.
* GPAV-Feature: Added keyboard stroke support to XMapPane
1 package skrueger.geotools;
2
3 import java.awt.Point;
4 import java.awt.Rectangle;
5 import java.awt.event.MouseEvent;
6 import java.awt.event.MouseWheelEvent;
7 import java.awt.geom.Point2D;
8
9 import org.opengis.geometry.DirectPosition;
10
11 import schmitzm.geotools.JTSUtil;
12
13 import com.vividsolutions.jts.geom.Coordinate;
14 import com.vividsolutions.jts.geom.Envelope;
15
16 public abstract class XMapPaneAction_Zoom implements XMapPaneAction {
17
18 @Override
19 public void performDragging(XMapPane mapPane, MouseEvent ev,
20 Point dragStartPos, Point dragLastPos,
21 DirectPosition startCoord, DirectPosition endCoord) {
22
23 if (dragLastPos != null)
24 mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
25 dragLastPos);
26
27 mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, ev
28 .getPoint());
29 }
30
31 public static class In extends XMapPaneAction_Zoom {
32
33 @Override
34 public void performClick(XMapPane mapPane, MouseEvent ev,
35 DirectPosition coord) {
36
37 mapPane.zoomTo(ev.getPoint(), 1 / 2.);
38 }
39
40 @Override
41 public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt,
42 DirectPosition coord) {
43
44 int units = wheelEvt.getUnitsToScroll();
45 // Positiver Wert --> Zoom in --> Faktor < 1
46 // Negativer Wert --> Zoom out --> Faktir > 1
47
48 // SK: 9.9.2007 zoom jetzt wie bei GoogleEarth
49 double zFactor = units > 0 ? 1.3 : 1 / 1.3;
50 // vorher double zFactor = units > 0 ? 1/1.2 : 1.2;
51
52 // Fenster-Koordinaten zu Karten-Koordinaten transformieren
53 Point2D mapCoord = XMapPane.getMapCoordinatesFromEvent(wheelEvt);
54 // Relative Position des Mauszeigers zum Kartenausschnitt
55 // -> Nach Zoom soll dieselbe Kartenposition unterhalb des Mauszeigers
56 // erscheinen, wie vor dem Zoom
57 double relX = (mapCoord.getX() - mapPane.getMapArea().getMinX())
58 / mapPane.getMapArea().getWidth();
59 double relY = (mapCoord.getY() - mapPane.getMapArea().getMinY())
60 / mapPane.getMapArea().getHeight();
61
62 // Neuen Karten-Ausschnitt berechnen
63 Coordinate ll = new Coordinate(mapCoord.getX()
64 - mapPane.getMapArea().getWidth() * relX * zFactor, mapCoord.getY()
65 - mapPane.getMapArea().getHeight() * relY * zFactor);
66 Coordinate ur = new Coordinate(mapCoord.getX()
67 + mapPane.getMapArea().getWidth() * (1 - relX) * zFactor, mapCoord
68 .getY()
69 + mapPane.getMapArea().getHeight() * (1 - relY) * zFactor);
70 mapPane.setMapArea(new Envelope(ll, ur));
71 }
72
73 @Override
74 public void performDragged(XMapPane mapPane, MouseEvent ev,
75 Point dragStartPos, Point dragLastPos,
76 DirectPosition startCoord, DirectPosition endCoord) {
77
78 if (dragLastPos != null)
79 mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
80 dragLastPos);
81
82 // If this is similar to a click, let mouseClicked handle it!
83 if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev
84 .getPoint().y
85 - dragStartPos.y)) < 160) {
86 // performClick(mapPane, ev, coord)
87 return;
88 }
89
90 final Rectangle bounds = mapPane.getBounds();
91
92 Envelope mapArea = mapPane.getMapArea();
93
94 // Replace with transform and translate
95 final double mapWidth = mapArea.getWidth();
96 final double mapHeight = mapArea.getHeight();
97
98 final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width)
99 + mapArea.getMinX();
100 final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height)
101 + mapArea.getMinY();
102 final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width)
103 + mapArea.getMinX();
104 final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height)
105 + mapArea.getMinY();
106
107 final double left = Math.min(startX, endX);
108 final double right = Math.max(startX, endX);
109 final double bottom = Math.min(startY, endY);
110 final double top = Math.max(startY, endY);
111 final Coordinate ll = new Coordinate(left, bottom);
112 final Coordinate ur = new Coordinate(right, top);
113
114 mapPane.setMapArea(new Envelope(ll, ur));
115
116 }
117
118 /**
119 * @param param is ignored
120 */
121 @Override
122 public void performKeyboard(XMapPane mapPane, Object param) {
123 mapPane.setMapArea( JTSUtil.expandEnvelope(mapPane.getMapArea(), -.10) );
124 }
125
126 }
127
128 public static class Out extends XMapPaneAction_Zoom {
129
130 /**
131 * @param param is ignored
132 */
133 @Override
134 public void performKeyboard(XMapPane mapPane, Object param) {
135 mapPane.setMapArea( JTSUtil.expandEnvelope(mapPane.getMapArea(), .10) );
136 }
137
138 @Override
139 public void performClick(XMapPane mapPane, MouseEvent ev,
140 DirectPosition coord) {
141
142 mapPane.zoomTo(ev.getPoint(), 2.);
143 }
144
145 @Override
146 public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt,
147 DirectPosition coord) {
148 int units = wheelEvt.getUnitsToScroll();
149 // Positiver Wert --> Zoom in --> Faktor < 1
150 // Negativer Wert --> Zoom out --> Faktir > 1
151
152 // SK: 9.9.2007 zoom jetzt wie bei GoogleEarth
153 double zFactor = units > 0 ? 1.3 : 1 / 1.3;
154 // vorher double zFactor = units > 0 ? 1/1.2 : 1.2;
155
156 // Fenster-Koordinaten zu Karten-Koordinaten transformieren
157 Point2D mapCoord = XMapPane.getMapCoordinatesFromEvent(wheelEvt);
158 // Relative Position des Mauszeigers zum Kartenausschnitt
159 // -> Nach Zoom soll dieselbe Kartenposition unterhalb des Mauszeigers
160 // erscheinen, wie vor dem Zoom
161 double relX = (mapCoord.getX() - mapPane.getMapArea().getMinX())
162 / mapPane.getMapArea().getWidth();
163 double relY = (mapCoord.getY() - mapPane.getMapArea().getMinY())
164 / mapPane.getMapArea().getHeight();
165
166 // Neuen Karten-Ausschnitt berechnen
167 Coordinate ll = new Coordinate(mapCoord.getX()
168 - mapPane.getMapArea().getWidth() * relX * zFactor, mapCoord.getY()
169 - mapPane.getMapArea().getHeight() * relY * zFactor);
170 Coordinate ur = new Coordinate(mapCoord.getX()
171 + mapPane.getMapArea().getWidth() * (1 - relX) * zFactor, mapCoord
172 .getY()
173 + mapPane.getMapArea().getHeight() * (1 - relY) * zFactor);
174 mapPane.setMapArea(new Envelope(ll, ur));
175 }
176
177
178 @Override
179 public void performDragged(XMapPane mapPane, MouseEvent ev,
180 Point dragStartPos, Point dragLastPos,
181 DirectPosition startCoord, DirectPosition endCoord) {
182
183 if (dragLastPos != null)
184 mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
185 dragLastPos);
186
187 // If this is similar to a click, let mouseClicked handle it!
188 if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev
189 .getPoint().y
190 - dragStartPos.y)) < 160) {
191 // performClick(mapPane, ev, coord)
192 return;
193 }
194
195 final Rectangle bounds = mapPane.getBounds();
196
197 Envelope mapArea = mapPane.getMapArea();
198
199 // Replace with transform and translate
200 final double mapWidth = mapArea.getWidth();
201 final double mapHeight = mapArea.getHeight();
202
203 final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width)
204 + mapArea.getMinX();
205 final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height)
206 + mapArea.getMinY();
207 final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width)
208 + mapArea.getMinX();
209 final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height)
210 + mapArea.getMinY();
211
212 // make the dragged rectangle in screen coords the new map size?
213 final double left = Math.min(startX, endX);
214 final double right = Math.max(startX, endX);
215 final double bottom = Math.min(startY, endY);
216 final double top = Math.max(startY, endY);
217 final double nWidth = (mapWidth * mapWidth) / (right - left);
218 final double nHeight = (mapHeight * mapHeight) / (top - bottom);
219 final double deltaX1 = left - mapArea.getMinX();
220 final double nDeltaX1 = (deltaX1 * nWidth) / mapWidth;
221 final double deltaY1 = bottom - mapArea.getMinY();
222 final double nDeltaY1 = (deltaY1 * nHeight) / mapHeight;
223 final Coordinate ll = new Coordinate(mapArea.getMinX() - nDeltaX1,
224 mapArea.getMinY() - nDeltaY1);
225 final double deltaX2 = mapArea.getMaxX() - right;
226 final double nDeltaX2 = (deltaX2 * nWidth) / mapWidth;
227 final double deltaY2 = mapArea.getMaxY() - top;
228 final double nDeltaY2 = (deltaY2 * nHeight) / mapHeight;
229 final Coordinate ur = new Coordinate(mapArea.getMaxX() + nDeltaX2,
230 mapArea.getMaxY() + nDeltaY2);
231
232 mapPane.setMapArea(new Envelope(ll, ur));
233
234 }
235 }
236 }

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