Line.java

package org.eclipse.ecf.tutorial.scribbleshare.toolbox;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;

/*******************************************************************************
 * Copyright (c) 2006 IBM, Inc and Composent, Inc. All rights reserved. This
 * program and the accompanying materials are made available under the terms of
 * the Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Ken Gilmer <kgilmer@gmail.com> - initial API and implementation
 ******************************************************************************/

/**
 * A line shape.
 * @author kgilmer
 *
 */
public class Line extends AbstractTool {

	private static final long serialVersionUID = -165859440014182966L;

	//private boolean dragging = false;

	private boolean dragging = false;

	public String getName() {
		return "Line";
	}

	public Image getImage() {
		return null;
	}

	public void draw(final Canvas canvas) {
		Display display = canvas.getDisplay();

		display.asyncExec(new Runnable() {
			public void run() {
				GC gc = new GC(canvas);
				setupGC(gc);
				// gc.setForeground(new Color(display,new RGB(128,128,128)));
				gc.drawLine(startX, startY, endX, endY);
				gc.dispose();
			}
		});

	}

	public void handleUIEvent(Event event, Canvas canvas) {
		switch (event.type) {
		case SWT.MouseUp:
			draw(canvas);
			penDown = false;
			dragging = false;
			isComplete = true;
			break;
		case SWT.MouseMove:			
			if (dragging) {				

				endX = event.x;
				endY = event.y;
				
				penDown = true;
			}
			break;
		case SWT.MouseDown:
			if (!dragging) {
				startX = event.x;
				startY = event.y;
				dragging = true;
				isComplete = false;
			}
			break;
		}

	}
}