/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

/*
 * Composite example snippet: intercept mouse events (drag a button with the mouse)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;

public class Snippet46 {
	
	private static Color COLOR ;
	protected static int x;
	protected static int y;
	protected static boolean started;

	public static void main(String[] args) {
		Display display = new Display();
		COLOR = new Color(null,new RGB(255, 255, 222));
		final Shell shell = new Shell(display);
		final Composite composite = new Composite(shell, SWT.NONE);
		composite.setEnabled(false);
		composite.setLayout(new FillLayout());
		Button button = new Button(composite, SWT.PUSH);
		button.setText("Button");
		composite.pack();
		composite.setLocation(10, 10);
		final Point[] offset = new Point[1];
		Listener listener = new Listener() {
			public void handleEvent(Event event) {
				switch (event.type) {
				case SWT.MouseDown:
					started = true;
					Rectangle rect = composite.getBounds();
					if (rect.contains(event.x, event.y)) {
						Point pt1 = composite.toDisplay(0, 0);
						Point pt2 = shell.toDisplay(event.x, event.y);
						offset[0] = new Point(pt2.x - pt1.x, pt2.y - pt1.y);
					}
					break;
				case SWT.MouseMove:
					if (offset[0] != null) {
						Point pt = offset[0];
						x = event.x - pt.x;
						y = event.y - pt.y;
						composite.setLocation(event.x - pt.x, event.y - pt.y);
						shell.redraw();
					}
					break;
				case SWT.MouseUp:
					offset[0] = null;
					started = false;
					shell.redraw();
					break;
				}
			}
		};
		shell.addListener(SWT.MouseDown, listener);
		shell.addListener(SWT.MouseUp, listener);
		shell.addListener(SWT.MouseMove, listener);
		shell.addPaintListener(new PaintListener() {
			private int tooltipHieght = 10;
			private int tooltipWidth = 50;
			@Override
			public void paintControl(PaintEvent e) {
				if (started) {
					// e.gc.setLineWidth(5);
					e.gc.setLineStyle(SWT.LINE_DOT);
					e.gc.drawLine(x, 0, x, e.height);
					e.gc.drawLine(0, y + composite.getBounds().height, e.width,
							y + composite.getBounds().height);
					System.out.println(x + ":" + y);
					e.gc.setBackground(COLOR);
					int height = e.gc.getFontMetrics().getHeight();
					int cwidth = e.gc.getFontMetrics().getAverageCharWidth();
					String string = x+","+y;
					tooltipWidth = cwidth*string.length();
					tooltipHieght = height;
					//e.gc.drawRectangle(new Rectangle(x-tooltipWidth, y-tooltipHieght, tooltipWidth, tooltipHieght));
					e.gc.fillRectangle(new Rectangle(x-tooltipWidth-5, y-tooltipHieght, tooltipWidth, tooltipHieght));
					
					e.gc.drawString(string, x-tooltipWidth-5, y-tooltipHieght);
				}
			}
		});
		shell.setSize(300, 300);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}