/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2003-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library 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;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.swt.tool;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.events.MouseTrackListener;
import org.eclipse.swt.events.MouseWheelListener;
import org.geotools.swt.SwtMapPane;
import org.geotools.swt.event.MapMouseEvent;
import org.geotools.swt.event.MapMouseListener;
import org.geotools.swt.utils.Messages;
/**
* Receives mouse events from a {@link SwtMapPane} instance, converts them to
* {@link MapMouseEvent}s, and sends these to the registered listeners.
*
* @author Andrea Antonello (www.hydrologis.com)
* @author Michael Bedward
*
*
*
* @source $URL$
*/
public class MapToolManager implements MouseListener, MouseMoveListener, MouseWheelListener, MouseTrackListener {
private SwtMapPane mapPane;
private Set<MapMouseListener> listeners = new HashSet<MapMouseListener>();
private CursorTool cursorTool;
/**
* Constructor
*
* @param pane the map pane that owns this listener
*/
public MapToolManager( SwtMapPane pane ) {
this.mapPane = pane;
}
/**
* Unset the current cursor tool
*/
public void setNoCursorTool() {
listeners.remove(cursorTool);
cursorTool = null;
}
/**
* Set the active cursor tool
*
* @param tool the tool to set
* @return true if successful; false otherwise
* @throws IllegalArgumentException if the tool argument is null
*/
public boolean setCursorTool( CursorTool tool ) {
if (tool == null) {
throw new IllegalArgumentException(Messages.getString("arg_null_error"));
}
if (cursorTool != null) {
listeners.remove(cursorTool);
}
cursorTool = tool;
cursorTool.setMapPane(mapPane);
return listeners.add(tool);
}
/**
* Get the active cursor tool
*
* @return live reference to the active cursor tool or {@code null} if no
* tool is active
*/
public CursorTool getCursorTool() {
return cursorTool;
}
/**
* Add a listener for JMapPaneMouseEvents
*
* @param listener the listener to add
* @return true if successful; false otherwise
* @throws IllegalArgumentException if the tool argument is null
*/
public boolean addMouseListener( MapMouseListener listener ) {
if (listener == null) {
throw new IllegalArgumentException(Messages.getString("arg_null_error"));
}
return listeners.add(listener);
}
/**
* Remove a MapMouseListener from the active listeners
*
* @param listener the listener to remove
* @return true if successful; false otherwise
* @throws IllegalArgumentException if the tool argument is null
*/
public boolean removeMouseListener( MapMouseListener listener ) {
if (listener == null) {
throw new IllegalArgumentException(Messages.getString("arg_null_error"));
}
return listeners.remove(listener);
}
public void mouseScrolled( MouseEvent e ) {
MapMouseEvent ev = convertWheelEvent(e);
if (ev != null) {
for( MapMouseListener listener : listeners ) {
listener.onMouseWheelMoved(ev);
}
}
}
public void mouseMove( MouseEvent e ) {
MapMouseEvent ev = convertEvent(e);
if (ev != null) {
for( MapMouseListener listener : listeners ) {
if (isMouseDown) {
listener.onMouseDragged(ev);
} else {
listener.onMouseMoved(ev);
}
}
}
}
public void mouseDoubleClick( MouseEvent arg0 ) {
// TODO Auto-generated method stub
}
boolean isMouseDown = false;
public void mouseDown( MouseEvent e ) {
isMouseDown = true;
MapMouseEvent ev = convertEvent(e);
if (ev != null) {
for( MapMouseListener listener : listeners ) {
listener.onMouseClicked(ev);
}
for( MapMouseListener listener : listeners ) {
listener.onMousePressed(ev);
}
}
}
public void mouseUp( MouseEvent e ) {
isMouseDown = false;
MapMouseEvent ev = convertEvent(e);
if (ev != null) {
for( MapMouseListener listener : listeners ) {
listener.onMouseReleased(ev);
}
}
}
public void mouseEnter( MouseEvent e ) {
MapMouseEvent ev = convertEvent(e);
if (ev != null) {
for( MapMouseListener listener : listeners ) {
listener.onMouseEntered(ev);
}
}
}
public void mouseExit( MouseEvent e ) {
MapMouseEvent ev = convertEvent(e);
if (ev != null) {
for( MapMouseListener listener : listeners ) {
listener.onMouseExited(ev);
}
}
}
public void mouseHover( MouseEvent arg0 ) {
// TODO Auto-generated method stub
}
private MapMouseEvent convertEvent( MouseEvent e ) {
MapMouseEvent ev = null;
if (mapPane.getScreenToWorldTransform() != null) {
ev = new MapMouseEvent(mapPane, e, false);
}
return ev;
}
private MapMouseEvent convertWheelEvent( MouseEvent e ) {
MapMouseEvent ev = null;
if (mapPane.getScreenToWorldTransform() != null) {
ev = new MapMouseEvent(mapPane, e, true);
}
return ev;
}
}