/*******************************************************************************
* Copyright (c) 2005 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
*******************************************************************************/
package org.eclipse.ui.examples.undo;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
/**
* 2D Box that can move itself, hit-test, and draw.
*/
public class Box {
/*
* The location of the box.
*/
public int x1, y1, x2, y2;
/*
* Constructs a box, defined by any two diametrically
* opposing corners.
*/
public Box(int x1, int y1, int x2, int y2) {
super();
set(x1, y1, x2, y2);
}
/*
* Move the box to a new origin.
*/
public void move(Point origin) {
set(origin.x, origin.y, origin.x + getWidth(), origin.y + getHeight());
}
/*
* Draw the box with the specified gc.
*/
public void draw(GC gc) {
gc.drawRectangle(x1, y1, x2-x1, y2-y1);
}
/*
* Set the position of the box
*/
private void set(int x1, int y1, int x2, int y2) {
this.x1 = Math.min(x1, x2);
this.y1 = Math.min(y1, y2);
this.x2 = Math.max(x1, x2);
this.y2 = Math.max(y1, y2);
}
/*
* Return true if this box contains the point specified by
* the x and y.
*/
public boolean contains(int x, int y) {
return x >= x1 &&
x <= x2 &&
y >= y1 &&
y <= y2;
}
/*
* Answer the width of the box
*/
public int getWidth() {
return x2 - x1;
}
/*
* Answer the height of the box
*/
public int getHeight() {
return y2 - y1;
}
}