skrueger/geotools/XMapPaneAction_Zoom.java

package skrueger.geotools;

import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;

import org.opengis.geometry.DirectPosition;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Envelope;

public abstract class XMapPaneAction_Zoom implements XMapPaneAction {

        @Override
        public void performDragging(XMapPane mapPane, MouseEvent ev,
                        Point dragStartPos, Point dragLastPos,
                        DirectPosition startCoord, DirectPosition endCoord) {

                if (dragLastPos != null)
                        mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
                                        dragLastPos);

                mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, ev
                                .getPoint());
        }

        public static class In extends XMapPaneAction_Zoom {

                @Override
                public void performClick(XMapPane mapPane, MouseEvent ev,
                                DirectPosition coord) {

                        mapPane.zoomTo(ev.getPoint(), 1 / 2.);
                }

                @Override
                public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt,
                                DirectPosition coord) {

                        final int units = wheelEvt.getUnitsToScroll();
                        if (units > 0)
                                mapPane.zoomTo(wheelEvt.getPoint(), 1. + .11 * units);
                        else
                                mapPane.zoomTo(wheelEvt.getPoint(), 2. / -units);
                }

                @Override
                public void performDragged(XMapPane mapPane, MouseEvent ev,
                                Point dragStartPos, Point dragLastPos,
                                DirectPosition startCoord, DirectPosition endCoord) {

                        if (dragLastPos != null)
                                mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
                                                dragLastPos);

                        // If this is similar to a click, let mouseClicked handle it!
                        if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev
                                        .getPoint().y
                                        - dragStartPos.y)) < 160) {
                                // performClick(mapPane, ev, coord)
                                return;
                        }

                        final Rectangle bounds = mapPane.getBounds();

                        Envelope mapArea = mapPane.getMapArea();

                        // Replace with transform and translate
                        final double mapWidth = mapArea.getWidth();
                        final double mapHeight = mapArea.getHeight();

                        final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width)
                                        + mapArea.getMinX();
                        final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height)
                                        + mapArea.getMinY();
                        final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width)
                                        + mapArea.getMinX();
                        final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height)
                                        + mapArea.getMinY();

                        final double left = Math.min(startX, endX);
                        final double right = Math.max(startX, endX);
                        final double bottom = Math.min(startY, endY);
                        final double top = Math.max(startY, endY);
                        final Coordinate ll = new Coordinate(left, bottom);
                        final Coordinate ur = new Coordinate(right, top);

                        mapPane.setMapArea(new Envelope(ll, ur));

                }
        }

        public static class Out extends XMapPaneAction_Zoom {

                @Override
                public void performClick(XMapPane mapPane, MouseEvent ev,
                                DirectPosition coord) {

                        mapPane.zoomTo(ev.getPoint(), 2.);
                }

                @Override
                public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt,
                                DirectPosition coord) {

                        final int units = wheelEvt.getUnitsToScroll();
                        if (units <= 0)
                                mapPane.zoomTo(wheelEvt.getPoint(), 1. + .11 * units);
                        else
                                mapPane.zoomTo(wheelEvt.getPoint(), 2. / -units);
                }


                @Override
                public void performDragged(XMapPane mapPane, MouseEvent ev,
                                Point dragStartPos, Point dragLastPos,
                                DirectPosition startCoord, DirectPosition endCoord) {

                        if (dragLastPos != null)
                                mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
                                                dragLastPos);

                        // If this is similar to a click, let mouseClicked handle it!
                        if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev
                                        .getPoint().y
                                        - dragStartPos.y)) < 160) {
                                // performClick(mapPane, ev, coord)
                                return;
                        }

                        final Rectangle bounds = mapPane.getBounds();

                        Envelope mapArea = mapPane.getMapArea();

                        // Replace with transform and translate
                        final double mapWidth = mapArea.getWidth();
                        final double mapHeight = mapArea.getHeight();

                        final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width)
                                        + mapArea.getMinX();
                        final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height)
                                        + mapArea.getMinY();
                        final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width)
                                        + mapArea.getMinX();
                        final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height)
                                        + mapArea.getMinY();

                        // make the dragged rectangle in screen coords the new map size?
                        final double left = Math.min(startX, endX);
                        final double right = Math.max(startX, endX);
                        final double bottom = Math.min(startY, endY);
                        final double top = Math.max(startY, endY);
                        final double nWidth = (mapWidth * mapWidth) / (right - left);
                        final double nHeight = (mapHeight * mapHeight) / (top - bottom);
                        final double deltaX1 = left - mapArea.getMinX();
                        final double nDeltaX1 = (deltaX1 * nWidth) / mapWidth;
                        final double deltaY1 = bottom - mapArea.getMinY();
                        final double nDeltaY1 = (deltaY1 * nHeight) / mapHeight;
                        final Coordinate ll = new Coordinate(mapArea.getMinX() - nDeltaX1,
                                        mapArea.getMinY() - nDeltaY1);
                        final double deltaX2 = mapArea.getMaxX() - right;
                        final double nDeltaX2 = (deltaX2 * nWidth) / mapWidth;
                        final double deltaY2 = mapArea.getMaxY() - top;
                        final double nDeltaY2 = (deltaY2 * nHeight) / mapHeight;
                        final Coordinate ur = new Coordinate(mapArea.getMaxX() + nDeltaX2,
                                        mapArea.getMaxY() + nDeltaY2);

                        mapPane.setMapArea(new Envelope(ll, ur));

                }
        }
}
1	alfonx	639	package skrueger.geotools;
2
3			import java.awt.Point;
4	alfonx	644	import java.awt.Rectangle;
5	alfonx	639	import java.awt.event.MouseEvent;
6			import java.awt.event.MouseWheelEvent;
7
8			import org.opengis.geometry.DirectPosition;
9
10	alfonx	644	import com.vividsolutions.jts.geom.Coordinate;
11			import com.vividsolutions.jts.geom.Envelope;
12
13	alfonx	646	public abstract class XMapPaneAction_Zoom implements XMapPaneAction {
14	alfonx	644
15	alfonx	649	@Override
16			public void performDragging(XMapPane mapPane, MouseEvent ev,
17			Point dragStartPos, Point dragLastPos,
18			DirectPosition startCoord, DirectPosition endCoord) {
19
20			if (dragLastPos != null)
21			mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
22			dragLastPos);
23
24			mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos, ev
25			.getPoint());
26			}
27
28	alfonx	648	public static class In extends XMapPaneAction_Zoom {
29	alfonx	646
30	alfonx	648	@Override
31			public void performClick(XMapPane mapPane, MouseEvent ev,
32			DirectPosition coord) {
33	alfonx	644
34	alfonx	648	mapPane.zoomTo(ev.getPoint(), 1 / 2.);
35			}
36	alfonx	639
37	alfonx	648	@Override
38			public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt,
39			DirectPosition coord) {
40	alfonx	639
41	alfonx	648	final int units = wheelEvt.getUnitsToScroll();
42			if (units > 0)
43			mapPane.zoomTo(wheelEvt.getPoint(), 1. + .11 * units);
44			else
45			mapPane.zoomTo(wheelEvt.getPoint(), 2. / -units);
46			}
47	alfonx	639
48	alfonx	648	@Override
49			public void performDragged(XMapPane mapPane, MouseEvent ev,
50			Point dragStartPos, Point dragLastPos,
51			DirectPosition startCoord, DirectPosition endCoord) {
52
53			if (dragLastPos != null)
54			mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
55			dragLastPos);
56
57			// If this is similar to a click, let mouseClicked handle it!
58			if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev
59			.getPoint().y
60			- dragStartPos.y)) < 160) {
61			// performClick(mapPane, ev, coord)
62			return;
63			}
64
65			final Rectangle bounds = mapPane.getBounds();
66
67			Envelope mapArea = mapPane.getMapArea();
68
69			// Replace with transform and translate
70			final double mapWidth = mapArea.getWidth();
71			final double mapHeight = mapArea.getHeight();
72
73			final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width)
74			+ mapArea.getMinX();
75			final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height)
76			+ mapArea.getMinY();
77			final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width)
78			+ mapArea.getMinX();
79			final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height)
80			+ mapArea.getMinY();
81
82			final double left = Math.min(startX, endX);
83			final double right = Math.max(startX, endX);
84			final double bottom = Math.min(startY, endY);
85			final double top = Math.max(startY, endY);
86			final Coordinate ll = new Coordinate(left, bottom);
87			final Coordinate ur = new Coordinate(right, top);
88
89			mapPane.setMapArea(new Envelope(ll, ur));
90
91			}
92	alfonx	644	}
93
94	alfonx	648	public static class Out extends XMapPaneAction_Zoom {
95	alfonx	639
96	alfonx	648	@Override
97			public void performClick(XMapPane mapPane, MouseEvent ev,
98			DirectPosition coord) {
99	alfonx	644
100	alfonx	648	mapPane.zoomTo(ev.getPoint(), 2.);
101	alfonx	644	}
102
103	alfonx	648	@Override
104			public void performWheel(XMapPane mapPane, MouseWheelEvent wheelEvt,
105			DirectPosition coord) {
106	alfonx	644
107	alfonx	648	final int units = wheelEvt.getUnitsToScroll();
108			if (units <= 0)
109			mapPane.zoomTo(wheelEvt.getPoint(), 1. + .11 * units);
110			else
111			mapPane.zoomTo(wheelEvt.getPoint(), 2. / -units);
112			}
113	alfonx	644
114
115	alfonx	648	@Override
116			public void performDragged(XMapPane mapPane, MouseEvent ev,
117			Point dragStartPos, Point dragLastPos,
118			DirectPosition startCoord, DirectPosition endCoord) {
119	alfonx	644
120	alfonx	648	if (dragLastPos != null)
121			mapPane.drawRectangle(mapPane.getGraphics(), dragStartPos,
122			dragLastPos);
123	alfonx	639
124	alfonx	648	// If this is similar to a click, let mouseClicked handle it!
125			if ((Math.abs(dragStartPos.x - ev.getPoint().x) * Math.abs(ev
126			.getPoint().y
127			- dragStartPos.y)) < 160) {
128			// performClick(mapPane, ev, coord)
129			return;
130			}
131	alfonx	646
132	alfonx	648	final Rectangle bounds = mapPane.getBounds();
133
134			Envelope mapArea = mapPane.getMapArea();
135
136			// Replace with transform and translate
137			final double mapWidth = mapArea.getWidth();
138			final double mapHeight = mapArea.getHeight();
139
140			final double startX = ((dragStartPos.x * mapWidth) / (double) bounds.width)
141			+ mapArea.getMinX();
142			final double startY = (((bounds.getHeight() - dragStartPos.y) * mapHeight) / (double) bounds.height)
143			+ mapArea.getMinY();
144			final double endX = ((ev.getPoint().x * mapWidth) / (double) bounds.width)
145			+ mapArea.getMinX();
146			final double endY = (((bounds.getHeight() - ev.getPoint().y) * mapHeight) / (double) bounds.height)
147			+ mapArea.getMinY();
148
149			// make the dragged rectangle in screen coords the new map size?
150			final double left = Math.min(startX, endX);
151			final double right = Math.max(startX, endX);
152			final double bottom = Math.min(startY, endY);
153			final double top = Math.max(startY, endY);
154			final double nWidth = (mapWidth * mapWidth) / (right - left);
155			final double nHeight = (mapHeight * mapHeight) / (top - bottom);
156			final double deltaX1 = left - mapArea.getMinX();
157			final double nDeltaX1 = (deltaX1 * nWidth) / mapWidth;
158			final double deltaY1 = bottom - mapArea.getMinY();
159			final double nDeltaY1 = (deltaY1 * nHeight) / mapHeight;
160			final Coordinate ll = new Coordinate(mapArea.getMinX() - nDeltaX1,
161			mapArea.getMinY() - nDeltaY1);
162			final double deltaX2 = mapArea.getMaxX() - right;
163			final double nDeltaX2 = (deltaX2 * nWidth) / mapWidth;
164			final double deltaY2 = mapArea.getMaxY() - top;
165			final double nDeltaY2 = (deltaY2 * nHeight) / mapHeight;
166			final Coordinate ur = new Coordinate(mapArea.getMaxX() + nDeltaX2,
167			mapArea.getMaxY() + nDeltaY2);
168
169			mapPane.setMapArea(new Envelope(ll, ur));
170
171			}
172			}
173	alfonx	646	}
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