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annotate dwtx/draw2d/StackLayout.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.StackLayout;
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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.Dimension;
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19 import dwtx.draw2d.geometry.Rectangle;
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20 import dwtx.draw2d.AbstractHintLayout;
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21 import dwtx.draw2d.IFigure;
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22
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23 /**
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24 * Figures using the StackLayout as their layout manager have their children placed on top
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25 * of one another. Order of placement is determined by the order in which the children
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26 * were added, first child added placed on the bottom.
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27 */
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28 public class StackLayout
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29 : AbstractHintLayout
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30 {
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31
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32 /**
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33 * Returns the minimum size required by the input container. This is the size of the
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34 * largest child of the container, as all other children fit into this size.
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35 *
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36 * @see AbstractHintLayout#calculateMinimumSize(IFigure, int, int)
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37 */
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38 protected Dimension calculateMinimumSize(IFigure figure, int wHint, int hHint) {
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39 if (wHint > -1)
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40 wHint = Math.max(0, wHint - figure.getInsets().getWidth());
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41 if (hHint > -1)
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42 hHint = Math.max(0, hHint - figure.getInsets().getHeight());
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43 Dimension d = new Dimension();
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44 List children = figure.getChildren();
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45 IFigure child;
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46 for (int i = 0; i < children.size(); i++) {
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47 child = cast(IFigure)children.get(i);
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48 if (!isObservingVisibility() || child.isVisible())
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49 d.union_(child.getMinimumSize(wHint, hHint));
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50 }
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51
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52 d.expand(figure.getInsets().getWidth(),
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53 figure.getInsets().getHeight());
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54 d.union_(getBorderPreferredSize(figure));
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55 return d;
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56
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57 }
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58
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59 /**
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60 * Calculates and returns the preferred size of the given figure. This is the union of
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61 * the preferred sizes of the widest and the tallest of all its children.
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62 *
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63 * @see AbstractLayout#calculatePreferredSize(IFigure, int, int)
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64 */
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65 protected Dimension calculatePreferredSize(IFigure figure, int wHint, int hHint) {
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66 if (wHint > -1)
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67 wHint = Math.max(0, wHint - figure.getInsets().getWidth());
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68 if (hHint > -1)
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69 hHint = Math.max(0, hHint - figure.getInsets().getHeight());
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70 Dimension d = new Dimension();
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71 List children = figure.getChildren();
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72 IFigure child;
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73 for (int i = 0; i < children.size(); i++) {
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74 child = cast(IFigure)children.get(i);
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75 if (!isObservingVisibility() || child.isVisible())
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76 d.union_(child.getPreferredSize(wHint, hHint));
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77 }
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78
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79 d.expand(figure.getInsets().getWidth(),
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80 figure.getInsets().getHeight());
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81 d.union_(getBorderPreferredSize(figure));
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82 return d;
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83 }
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84
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85 /**
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86 * @see dwtx.draw2d.LayoutManager#layout(IFigure)
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87 */
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88 public void layout(IFigure figure) {
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89 Rectangle r = figure.getClientArea();
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90 List children = figure.getChildren();
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91 IFigure child;
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92 for (int i = 0; i < children.size(); i++) {
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93 child = cast(IFigure)children.get(i);
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94 child.setBounds(r);
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95 }
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96 }
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97
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98 }