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annotate dwtx/draw2d/ScalableFreeformLayeredPane.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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.draw2d.ScalableFreeformLayeredPane;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import dwtx.draw2d.geometry.Rectangle;
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18 import dwtx.draw2d.geometry.Translatable;
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19 import dwtx.draw2d.FreeformLayeredPane;
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20 import dwtx.draw2d.ScalableFigure;
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21 import dwtx.draw2d.Graphics;
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22 import dwtx.draw2d.ScaledGraphics;
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23
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24 /**
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25 * @author hudsonr
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26 * @since 2.1
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27 */
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28 public class ScalableFreeformLayeredPane
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29 : FreeformLayeredPane
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30 , ScalableFigure
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31 {
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32
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33 private double scale = 1.0;
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34
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35 /**
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36 * @see dwtx.draw2d.Figure#getClientArea()
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37 */
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38 public Rectangle getClientArea(Rectangle rect) {
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39 super.getClientArea(rect);
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40 rect.width /= scale;
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41 rect.height /= scale;
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42 rect.x /= scale;
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43 rect.y /= scale;
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44 return rect;
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45 }
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46
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47 /**
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48 * Returns the current zoom scale level.
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49 * @return the scale
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50 */
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51 public double getScale() {
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52 return scale;
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53 }
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54
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55 /**
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56 * @see dwtx.draw2d.IFigure#isCoordinateSystem()
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57 */
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58 public bool isCoordinateSystem() {
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59 return true;
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60 }
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61
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62 /**
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63 * @see dwtx.draw2d.Figure#paintClientArea(Graphics)
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64 */
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65 protected void paintClientArea(Graphics graphics) {
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66 if (getChildren().isEmpty())
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67 return;
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68 if (scale is 1.0) {
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69 super.paintClientArea(graphics);
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70 } else {
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71 ScaledGraphics g = new ScaledGraphics(graphics);
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72 bool optimizeClip = getBorder() is null || getBorder().isOpaque();
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73 if (!optimizeClip)
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74 g.clipRect(getBounds().getCropped(getInsets()));
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75 g.scale(scale);
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76 g.pushState();
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77 paintChildren(g);
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78 g.dispose();
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79 graphics.restoreState();
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80 }
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81 }
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82
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83 /**
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84 * Sets the zoom level
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85 * @param newZoom The new zoom level
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86 */
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87 public void setScale(double newZoom) {
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88 if (scale is newZoom)
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89 return;
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90 scale = newZoom;
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91 superFireMoved(); //For AncestorListener compatibility
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92 getFreeformHelper().invalidate();
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93 repaint();
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94 }
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95
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96 /**
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97 * @see dwtx.draw2d.Figure#translateToParent(Translatable)
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98 */
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99 public void translateToParent(Translatable t) {
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100 t.performScale(scale);
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101 }
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102
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103 /**
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104 * @see dwtx.draw2d.Figure#translateFromParent(Translatable)
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105 */
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106 public void translateFromParent(Translatable t) {
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107 t.performScale(1 / scale);
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108 }
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109
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110 /**
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111 * @see dwtx.draw2d.Figure#useLocalCoordinates()
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112 */
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113 protected final bool useLocalCoordinates() {
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114 return false;
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115 }
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116
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117 }