skrueger/geotools/XMapPaneAction_Pan.java

/*******************************************************************************
 * Copyright (c) 2009 Martin O. J. Schmitz.
 * 
 * This file is part of the SCHMITZM library - a collection of utility 
 * classes based on Java 1.6, focusing (not only) on Java Swing 
 * and the Geotools library.
 * 
 * The SCHMITZM project is hosted at:
 * http://wald.intevation.org/projects/schmitzm/
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License (license.txt)
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * or try this link: http://www.gnu.org/licenses/lgpl.html
 * 
 * Contributors:
 *     Martin O. J. Schmitz - initial API and implementation
 *     Stefan A. Krüger - additional utility classes
 ******************************************************************************/
package skrueger.geotools;

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

import org.opengis.geometry.DirectPosition;

import schmitzm.swing.SwingUtil;

import com.vividsolutions.jts.geom.Envelope;

public class XMapPaneAction_Pan implements XMapPaneAction {
        
        /**
         * This variable can be used to backup the active cursor of the mapPane, if
         * the actions changes the cursor during dragging
         */
        public Cursor backupCursor = null;
        
        /**
         * Performs a pan action. During panning, the displacement is
         * stored in {@link #imageOrigin} object. Calling {@link #performPan()} will
         * reset the offset and call {@link #setMapArea(Envelope)}.
         */
        @Override
        public void performDragged(XMapPane mapPane, MouseEvent ev,
                        Point dragStartPos, Point dragLastPos, DirectPosition startCoord,
                        DirectPosition endCoord) {

                final Rectangle winBounds = mapPane.getVisibleRect();

                Point imageOrigin = mapPane.getImageOrigin();

                winBounds.translate(-imageOrigin.x, -imageOrigin.y);
                final Envelope newMapArea = mapPane.tranformWindowToGeo(winBounds.x,
                                winBounds.y, winBounds.x + winBounds.width, winBounds.y
                                                + winBounds.height);

                imageOrigin.x = 0;
                imageOrigin.y = 0;

                if (!mapPane.setMapArea(newMapArea)) {
                        /**
                         * If setMapArea returns true, the finalImage is updated anyways.
                         * This if-case exists to ensure that we repaint a correct image
                         * even if the new panning area has been denied.
                         */
                        mapPane.updateFinalImage();
                        mapPane.repaint();
                }

                if (mapPane.getCursor() == SwingUtil.PANNING_CURSOR) {
                        mapPane.setCursor(backupCursor);
                }
        }

        /**
         * TODO: Stop dragging if the expected map area would not be valid.
         */
        @Override
        public void performDragging(XMapPane mapPane, MouseEvent ev,
                        Point dragStartPos, Point dragLastPos, DirectPosition startCoord,
                        DirectPosition endCoord) {

                if (mapPane.getCursor() != SwingUtil.PANNING_CURSOR) {
                        backupCursor = mapPane.getCursor();
                        mapPane.setCursor(SwingUtil.PANNING_CURSOR);
                }

                int dX;
                int dY;

                if (dragLastPos == null) {
                        dX = ev.getPoint().x - dragStartPos.x;
                        dY = ev.getPoint().y - dragStartPos.y;
                } else {
                        dX = ev.getPoint().x - dragLastPos.x;
                        dY = ev.getPoint().y - dragLastPos.y;
                }

                if (dX != 0 && dY != 0)
                        mapPane.pan(dX, dY);

        }

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


}
1	alfonx	651	/*******************************************************************************
2			* Copyright (c) 2009 Martin O. J. Schmitz.
3			*
4			* This file is part of the SCHMITZM library - a collection of utility
5			* classes based on Java 1.6, focusing (not only) on Java Swing
6			* and the Geotools library.
7			*
8			* The SCHMITZM project is hosted at:
9			* http://wald.intevation.org/projects/schmitzm/
10			*
11			* This program is free software; you can redistribute it and/or
12			* modify it under the terms of the GNU Lesser General Public License
13			* as published by the Free Software Foundation; either version 3
14			* of the License, or (at your option) any later version.
15			*
16			* This program is distributed in the hope that it will be useful,
17			* but WITHOUT ANY WARRANTY; without even the implied warranty of
18			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19			* GNU General Public License for more details.
20			*
21			* You should have received a copy of the GNU Lesser General Public License (license.txt)
22			* along with this program; if not, write to the Free Software
23			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24			* or try this link: http://www.gnu.org/licenses/lgpl.html
25			*
26			* Contributors:
27			* Martin O. J. Schmitz - initial API and implementation
28			* Stefan A. Krüger - additional utility classes
29			******************************************************************************/
30			package skrueger.geotools;
31
32			import java.awt.Cursor;
33			import java.awt.Point;
34			import java.awt.Rectangle;
35			import java.awt.event.MouseEvent;
36			import java.awt.event.MouseWheelEvent;
37
38			import org.opengis.geometry.DirectPosition;
39
40			import schmitzm.swing.SwingUtil;
41
42			import com.vividsolutions.jts.geom.Envelope;
43
44			public class XMapPaneAction_Pan implements XMapPaneAction {
45
46			/**
47			* This variable can be used to backup the active cursor of the mapPane, if
48			* the actions changes the cursor during dragging
49			*/
50			public Cursor backupCursor = null;
51
52			/**
53			* Performs a pan action. During panning, the displacement is
54			* stored in {@link #imageOrigin} object. Calling {@link #performPan()} will
55			* reset the offset and call {@link #setMapArea(Envelope)}.
56			*/
57			@Override
58			public void performDragged(XMapPane mapPane, MouseEvent ev,
59			Point dragStartPos, Point dragLastPos, DirectPosition startCoord,
60			DirectPosition endCoord) {
61
62			final Rectangle winBounds = mapPane.getVisibleRect();
63
64			Point imageOrigin = mapPane.getImageOrigin();
65
66			winBounds.translate(-imageOrigin.x, -imageOrigin.y);
67			final Envelope newMapArea = mapPane.tranformWindowToGeo(winBounds.x,
68			winBounds.y, winBounds.x + winBounds.width, winBounds.y
69			+ winBounds.height);
70
71			imageOrigin.x = 0;
72			imageOrigin.y = 0;
73
74			if (!mapPane.setMapArea(newMapArea)) {
75			/**
76			* If setMapArea returns true, the finalImage is updated anyways.
77			* This if-case exists to ensure that we repaint a correct image
78			* even if the new panning area has been denied.
79			*/
80			mapPane.updateFinalImage();
81			mapPane.repaint();
82			}
83
84			if (mapPane.getCursor() == SwingUtil.PANNING_CURSOR) {
85			mapPane.setCursor(backupCursor);
86			}
87			}
88
89			/**
90			* TODO: Stop dragging if the expected map area would not be valid.
91			*/
92			@Override
93			public void performDragging(XMapPane mapPane, MouseEvent ev,
94			Point dragStartPos, Point dragLastPos, DirectPosition startCoord,
95			DirectPosition endCoord) {
96
97			if (mapPane.getCursor() != SwingUtil.PANNING_CURSOR) {
98			backupCursor = mapPane.getCursor();
99			mapPane.setCursor(SwingUtil.PANNING_CURSOR);
100			}
101
102			int dX;
103			int dY;
104
105			if (dragLastPos == null) {
106			dX = ev.getPoint().x - dragStartPos.x;
107			dY = ev.getPoint().y - dragStartPos.y;
108			} else {
109			dX = ev.getPoint().x - dragLastPos.x;
110			dY = ev.getPoint().y - dragLastPos.y;
111			}
112
113			if (dX != 0 && dY != 0)
114			mapPane.pan(dX, dY);
115
116			}
117
118			@Override
119			public void performWheel(XMapPane mapPane, MouseWheelEvent ev,
120			DirectPosition coord) {
121			}
122
123			@Override
124			public void performClick(XMapPane mapPane, MouseEvent ev,
125			DirectPosition coord) {
126			}
127
128
129			}
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