/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2004, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.tools.edit.behaviour;
import java.awt.Rectangle;
import java.util.Timer;
import java.util.TimerTask;
import org.locationtech.udig.core.IProvider;
import org.locationtech.udig.project.command.UndoableMapCommand;
import org.locationtech.udig.project.ui.render.displayAdapter.MapMouseEvent;
import org.locationtech.udig.project.ui.render.displayAdapter.MapMouseWheelEvent;
import org.locationtech.udig.tools.edit.EditPlugin;
import org.locationtech.udig.tools.edit.EditToolHandler;
import org.locationtech.udig.tools.edit.EventBehaviour;
import org.locationtech.udig.tools.edit.EventType;
import org.locationtech.udig.tools.edit.commands.DrawSnapAreaCommand;
import org.locationtech.udig.tools.edit.preferences.PreferenceUtil;
import org.locationtech.udig.tools.edit.support.Point;
/**
* <p>
* Requirements:
* <ul>
* <li>EventType==WHEEL</li>
* <li>Modifier is ALT</li>
* </ul>
* </p>
* <p>
* Action:
* <ul>
* <li>Increases or decreases size of the snap shape depending on number of clicks.</li>
* </ul>
* </p>
* Note: This is not undoable.
*
* @author jones
* @since 1.1.0
*/
public class SetSnapSizeBehaviour implements EventBehaviour {
private DrawSnapAreaCommand command;
public boolean isValid( EditToolHandler handler, MapMouseEvent e, EventType eventType ) {
boolean onlyAltDown = e.isAltDown()
&& (e.modifiers & MapMouseEvent.ALT_DOWN_MASK) == MapMouseEvent.ALT_DOWN_MASK;
return onlyAltDown && eventType == EventType.WHEEL;
}
public UndoableMapCommand getCommand( EditToolHandler handler, final MapMouseEvent e,
EventType eventType ) {
Rectangle oldBounds=null;
synchronized (this) {
if( command!=null ){
oldBounds=command.getValidArea();
}
if (command == null) {
class PointProvider implements IProvider<Point>{
public Point get(Object... params) {
return Point.valueOf(e.x, e.y);
}
}
command = new DrawSnapAreaCommand(new PointProvider());
handler.getContext().sendSyncCommand(command);
}
if (task != null)
task.cancel();
task = new Deactivator(handler);
timer.schedule(task, 1000);
}
int oldRadius = PreferenceUtil.instance().getSnappingRadius();
if( !(e instanceof MapMouseWheelEvent) )
throw new RuntimeException("Expected a MapMouseWheelEvent but got a: "+e.getClass().getName()); //$NON-NLS-1$
MapMouseWheelEvent event = (MapMouseWheelEvent) e;
int i = oldRadius + event.clickCount;
if( i<0 )
i=0;
PreferenceUtil.instance().setSnappingRadius(i);
Rectangle bounds;
synchronized (this) {
bounds = command.getValidArea();
}
if( oldBounds!=null )
bounds.createUnion(oldBounds);
handler.getContext().getViewportPane().repaint(bounds.x, bounds.y, bounds.width, bounds.height);
return null;
}
public void handleError( EditToolHandler handler, Throwable error, UndoableMapCommand command ) {
EditPlugin.log("", error); //$NON-NLS-1$
}
Timer timer = new Timer();
Deactivator task;
class Deactivator extends TimerTask {
private EditToolHandler handler;
public Deactivator( EditToolHandler handler ) {
this.handler=handler;
}
@Override
public void run() {
synchronized (SetSnapSizeBehaviour.this) {
task = null;
command.setValid(false);
command = null;
handler.repaint();
handler.getContext().getViewportPane().repaint();
}
}
}
}