| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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 |
| * Alex Selkov - Fix for Bug# 22701 |
| *******************************************************************************/ |
| package org.eclipse.draw2d; |
| |
| import org.eclipse.draw2d.geometry.Rectangle; |
| |
| /** |
| * An figure that draws an ellipse filling its bounds. |
| */ |
| public class Ellipse extends Shape { |
| /** |
| * Constructs a new Ellipse with the default values of a Shape. |
| * |
| * @since 2.0 |
| */ |
| public Ellipse() { |
| } |
| |
| /** |
| * Returns <code>true</code> if the given point (x,y) is contained within |
| * this ellipse. |
| * |
| * @param x |
| * the x coordinate |
| * @param y |
| * the y coordinate |
| * @return <code>true</code>if the given point is contained |
| */ |
| public boolean containsPoint(int x, int y) { |
| if (!super.containsPoint(x, y)) { |
| return false; |
| } else { |
| Rectangle r = getBounds(); |
| long ux = x - r.x - r.width / 2; |
| long uy = y - r.y - r.height / 2; |
| return ((ux * ux) << 10) / (r.width * r.width) + ((uy * uy) << 10) |
| / (r.height * r.height) <= 256; |
| } |
| } |
| |
| /** |
| * Fills the ellipse. |
| * |
| * @see org.eclipse.draw2d.Shape#fillShape(org.eclipse.draw2d.Graphics) |
| */ |
| protected void fillShape(Graphics graphics) { |
| graphics.fillOval(getOptimizedBounds()); |
| } |
| |
| /** |
| * Outlines the ellipse. |
| * |
| * @see org.eclipse.draw2d.Shape#outlineShape(org.eclipse.draw2d.Graphics) |
| */ |
| protected void outlineShape(Graphics graphics) { |
| graphics.drawOval(getOptimizedBounds()); |
| } |
| |
| private Rectangle getOptimizedBounds() { |
| float lineInset = Math.max(1.0f, getLineWidthFloat()) / 2.0f; |
| int inset1 = (int) Math.floor(lineInset); |
| int inset2 = (int) Math.ceil(lineInset); |
| |
| Rectangle r = Rectangle.getSINGLETON().setBounds(getBounds()); |
| r.x += inset1; |
| r.y += inset1; |
| r.width -= inset1 + inset2; |
| r.height -= inset1 + inset2; |
| return r; |
| } |
| } |