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annotate dwtx/draw2d/Ellipse.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Alex Selkov - Fix for Bug# 22701
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11 * Port to the D programming language:
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12 * Frank Benoit <benoit@tionex.de>
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13 *******************************************************************************/
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14 module dwtx.draw2d.Ellipse;
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15
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16 import dwt.dwthelper.utils;
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17
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18 import dwtx.draw2d.geometry.Rectangle;
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19 import dwtx.draw2d.Shape;
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20 import dwtx.draw2d.Graphics;
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21
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22 /**
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23 * An figure that draws an ellipse filling its bounds.
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24 */
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25 public class Ellipse
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26 : Shape
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27 {
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28
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29 /**
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30 * Constructs a new Ellipse with the default values of a Shape.
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31 * @since 2.0
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32 */
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33 public this() { }
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34
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35 /**
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36 * Returns <code>true</code> if the given point (x,y) is contained within this ellipse.
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37 * @param x the x coordinate
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38 * @param y the y coordinate
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39 * @return <code>true</code>if the given point is contained
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40 */
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41 public bool containsPoint(int x, int y) {
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42 if (!super.containsPoint(x, y))
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43 return false;
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44 Rectangle r = getBounds();
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45 long ux = x - r.x - r.width / 2;
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46 long uy = y - r.y - r.height / 2;
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47 return ((ux * ux) << 10) / (r.width * r.width)
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48 + ((uy * uy) << 10) / (r.height * r.height) <= 256;
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49 }
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50
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51 /**
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52 * Fills the ellipse.
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53 * @see dwtx.draw2d.Shape#fillShape(dwtx.draw2d.Graphics)
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54 */
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55 protected void fillShape(Graphics graphics) {
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56 graphics.fillOval(getBounds());
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57 }
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58
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59 /**
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60 * Outlines the ellipse.
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61 * @see dwtx.draw2d.Shape#outlineShape(dwtx.draw2d.Graphics)
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62 */
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63 protected void outlineShape(Graphics graphics) {
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64 Rectangle r = Rectangle.SINGLETON;
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65 r.setBounds(getBounds());
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66 r.width--;
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67 r.height--;
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68 r.shrink((lineWidth - 1) / 2, (lineWidth - 1) / 2);
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69 graphics.drawOval(r);
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70 }
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71
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72 }