package com.qualityeclipse.genealogy.listener;

import org.eclipse.draw2d.*;
import org.eclipse.draw2d.geometry.*;

public abstract class FigureMover 

implements MouseListener, MouseMotionListener
{
private final IFigure figure;

public FigureMover(IFigure figure) {
	this.figure = figure;
	figure.addMouseListener(this);
	figure.addMouseMotionListener(this);
}


private Point location;
public void mousePressed(MouseEvent event) {
	location = event.getLocation();
	event.consume();
}

public void mouseDragged(MouseEvent event) {
	if(location == null)
		return;
	Point newLocation = event.getLocation();
	if (newLocation == null)
		return;
	Dimension offset = newLocation.getDifference(location);
	if (offset.width == 0 && offset.height == 0)
		return;
	location = newLocation;
	
	UpdateManager updateMgr = figure.getUpdateManager();
	LayoutManager layoutMgr = figure.getParent().getLayoutManager();
	Rectangle bounds = figure.getBounds();
	updateMgr.addDirtyRegion(figure.getParent(), bounds);
	bounds = bounds.getCopy().translate(offset.width, offset.height);
	layoutMgr.setConstraint(figure, bounds);
	figure.translate(offset.width, offset.height);
	updateMgr.addDirtyRegion(figure.getParent(), bounds);
	event.consume();
	}

public void mouseReleased(MouseEvent event) {
	if(location == null)
		return;
	location = null;
	event.consume();
}



}