/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jtstest.testbuilder.ui.tools;
import java.awt.Cursor;
import java.awt.Toolkit;
import java.awt.event.MouseEvent;
import java.awt.geom.Point2D;
import org.locationtech.jtstest.*;
import org.locationtech.jtstest.testbuilder.AppCursors;
import org.locationtech.jtstest.testbuilder.GeometryEditPanel;
/**
* @version 1.7
*/
public class PanTool extends BasicTool {
private static PanTool singleton = null;
public static PanTool getInstance() {
if (singleton == null)
singleton = new PanTool();
return singleton;
}
private Point2D source;
private PanTool() {
}
public Cursor getCursor() {
return AppCursors.HAND;
}
public void activate() {
source = null;
}
public void mousePressed(MouseEvent e) {
source = toModel(e.getPoint());
}
public void mouseReleased(MouseEvent e) {
if (source == null)
return;
Point2D destination = toModel(e.getPoint());
pan(panel(), source, destination);
}
public static void pan(GeometryEditPanel panel, Point2D source, Point2D destination ) {
double xDisplacement = destination.getX() - source.getX();
double yDisplacement = destination.getY() - source.getY();
panel.zoomPan(xDisplacement, yDisplacement);
}
}