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annotate dwtx/draw2d/ScalableLayeredPane.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.ScalableLayeredPane;
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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.Dimension;
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18 import dwtx.draw2d.geometry.Rectangle;
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19 import dwtx.draw2d.geometry.Translatable;
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20 import dwtx.draw2d.LayeredPane;
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21 import dwtx.draw2d.ScalableFigure;
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22 import dwtx.draw2d.Graphics;
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23 import dwtx.draw2d.ScaledGraphics;
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24
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25 /**
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26 * A non-freeform, scalable layered pane.
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27 * @author Eric Bordeau
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28 * @since 2.1.1
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29 */
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30 public class ScalableLayeredPane
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31 : LayeredPane
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32 , ScalableFigure
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33 {
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34
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35 private double scale = 1.0;
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36
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37 /**
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38 * @see IFigure#getClientArea(Rectangle)
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39 */
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40 public Rectangle getClientArea(Rectangle rect) {
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41 super.getClientArea(rect);
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42 rect.width /= scale;
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43 rect.height /= scale;
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44 rect.x /= scale;
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45 rect.y /= scale;
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46 return rect;
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47 }
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48
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49 /**
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50 * @see Figure#getPreferredSize(int, int)
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51 */
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52 public Dimension getMinimumSize(int wHint, int hHint) {
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53 Dimension d = super.getMinimumSize(cast(int) (wHint / getScale()), cast(int)(hHint / getScale()));
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54 int w = getInsets().getWidth();
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55 int h = getInsets().getHeight();
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56 return d.getExpanded(-w, -h)
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57 .scale(scale)
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58 .expand(w, h);
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59 }
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60
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61 /**
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62 * @see Figure#getPreferredSize(int, int)
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63 */
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64 public Dimension getPreferredSize(int wHint, int hHint) {
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65 Dimension d = super.getPreferredSize(cast(int) (wHint / getScale()), cast(int)(hHint / getScale()));
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66 int w = getInsets().getWidth();
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67 int h = getInsets().getHeight();
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68 return d.getExpanded(-w, -h)
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69 .scale(scale)
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70 .expand(w, h);
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71 }
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72
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73 /**
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74 * Returns the scale level, default is 1.0.
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75 * @return the scale level
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76 */
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77 public double getScale() {
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78 return scale;
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79 }
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80
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81 /**
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82 * @see dwtx.draw2d.IFigure#isCoordinateSystem()
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83 */
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84 public bool isCoordinateSystem() {
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85 return true;
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86 }
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87
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88 /**
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89 * @see dwtx.draw2d.Figure#paintClientArea(Graphics)
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90 */
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91 protected void paintClientArea(Graphics graphics) {
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92 if (getChildren().isEmpty())
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93 return;
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94 if (scale is 1.0) {
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95 super.paintClientArea(graphics);
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96 } else {
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97 ScaledGraphics g = new ScaledGraphics(graphics);
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98 bool optimizeClip = getBorder() is null || getBorder().isOpaque();
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99 if (!optimizeClip)
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100 g.clipRect(getBounds().getCropped(getInsets()));
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101 g.scale(scale);
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102 g.pushState();
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103 paintChildren(g);
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104 g.dispose();
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105 graphics.restoreState();
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106 }
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107 }
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108
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109 /**
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110 * Sets the zoom level
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111 * @param newZoom The new zoom level
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112 */
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113 public void setScale(double newZoom) {
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114 if (scale is newZoom)
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115 return;
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116 scale = newZoom;
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117 fireMoved(); //for AncestorListener compatibility
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118 revalidate();
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119 repaint();
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120 }
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121
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122 /**
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123 * @see dwtx.draw2d.Figure#translateFromParent(Translatable)
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124 */
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125 public void translateFromParent(Translatable t) {
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126 t.performScale(1 / scale);
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127 }
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128
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129 /**
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130 * @see dwtx.draw2d.Figure#translateToParent(Translatable)
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131 */
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132 public void translateToParent(Translatable t) {
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133 t.performScale(scale);
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134 }
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135
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136 }