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annotate dwtx/draw2d/FreeformHelper.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.FreeformHelper;
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14
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15 import dwt.dwthelper.utils;
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16 import dwtx.dwtxhelper.Collection;
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17
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18 import dwtx.draw2d.geometry.Insets;
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19 import dwtx.draw2d.geometry.Rectangle;
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20 import dwtx.draw2d.FreeformListener;
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21 import dwtx.draw2d.FreeformFigure;
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22 import dwtx.draw2d.IFigure;
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23 import dwtx.draw2d.FigureListener;
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24
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25 class FreeformHelper
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26 : FreeformListener
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27 {
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28
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29 class ChildTracker : FigureListener {
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30 public void figureMoved(IFigure source) {
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31 invalidate();
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32 }
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33 }
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34
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35 private FreeformFigure host;
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36 private Rectangle freeformExtent;
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37 private FigureListener figureListener;
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38
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39 private void instanceInit(){
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40 figureListener = new ChildTracker();
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41 }
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42 this(FreeformFigure host) {
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43 instanceInit();
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44 this.host = host;
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45 }
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46
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47 public Rectangle getFreeformExtent() {
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48 if (freeformExtent !is null)
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49 return freeformExtent;
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50 Rectangle r;
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51 List children = host.getChildren();
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52 for (int i = 0; i < children.size(); i++) {
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53 IFigure child = cast(IFigure)children.get(i);
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54 if (null !is cast(FreeformFigure) child )
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55 r = (cast(FreeformFigure) child).getFreeformExtent();
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56 else
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57 r = child.getBounds();
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58 if (freeformExtent is null)
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59 freeformExtent = r.getCopy();
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60 else
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61 freeformExtent.union_(r);
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62 }
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63 Insets insets = host.getInsets();
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64 if (freeformExtent is null)
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65 freeformExtent = new Rectangle(0, 0, insets.getWidth(), insets.getHeight());
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66 else {
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67 host.translateToParent(freeformExtent);
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68 freeformExtent.expand(insets);
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69 }
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70 // System.out.println("New extent calculated for " + host + " = " + freeformExtent);
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71 return freeformExtent;
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72 }
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73
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74 public void hookChild(IFigure child) {
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75 invalidate();
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76 if (null !is cast(FreeformFigure)child )
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77 (cast(FreeformFigure)child).addFreeformListener(this);
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78 else
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79 child.addFigureListener(figureListener);
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80 }
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81
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82 void invalidate() {
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83 freeformExtent = null;
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84 host.fireExtentChanged();
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85 if (host.getParent() !is null)
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86 host.getParent().revalidate();
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87 else
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88 host.revalidate();
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89 }
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90
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91 public void notifyFreeformExtentChanged() {
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92 //A childs freeform extent has changed, therefore this extent must be recalculated
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93 invalidate();
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94 }
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95
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96 public void setFreeformBounds(Rectangle bounds) {
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97 host.setBounds(bounds);
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98 bounds = bounds.getCopy();
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99 host.translateFromParent(bounds);
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100 List children = host.getChildren();
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101 for (int i = 0; i < children.size(); i++) {
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102 IFigure child = cast(IFigure)children.get(i);
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103 if (null !is cast(FreeformFigure)child )
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104 (cast(FreeformFigure) child).setFreeformBounds(bounds);
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105 }
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106 }
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107
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108 public void unhookChild(IFigure child) {
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109 invalidate();
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110 if (null !is cast(FreeformFigure)child )
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111 (cast(FreeformFigure)child).removeFreeformListener(this);
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112 else
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113 child.removeFigureListener(figureListener);
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114 }
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115
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116 }