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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/ScrollPaneLayout.d @ 104:88652073d1c2
More work on icu
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 02 May 2009 11:27:24 +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 org.eclipse.draw2d.ScrollPaneLayout; |
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14 |
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15 import java.lang.all; |
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16 |
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17 import org.eclipse.draw2d.geometry.Dimension; |
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18 import org.eclipse.draw2d.geometry.Insets; |
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19 import org.eclipse.draw2d.geometry.Rectangle; |
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20 |
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21 import org.eclipse.draw2d.AbstractHintLayout; |
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22 import org.eclipse.draw2d.IFigure; |
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23 import org.eclipse.draw2d.ScrollPane; |
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24 import org.eclipse.draw2d.ScrollBar; |
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25 import org.eclipse.draw2d.Viewport; |
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26 import org.eclipse.draw2d.ScrollPaneSolver; |
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27 |
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28 /** |
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29 * The ScrollPaneLayout is responsible for laying out the {@link Viewport} and |
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30 * {@link ScrollBar ScrollBars} of a {@link ScrollPane}. |
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31 */ |
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32 public class ScrollPaneLayout |
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33 : AbstractHintLayout |
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34 { |
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35 |
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36 /** @see ScrollPane#NEVER */ |
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37 protected static const int NEVER = ScrollPane.NEVER; |
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38 /** @see ScrollPane#AUTOMATIC */ |
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39 protected static const int AUTO = ScrollPane.AUTOMATIC; |
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40 /** @see ScrollPane#ALWAYS */ |
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41 protected static const int ALWAYS = ScrollPane.ALWAYS; |
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42 |
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43 /** |
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44 * @see AbstractHintLayout#calculateMinimumSize(IFigure, int, int) |
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45 */ |
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46 public Dimension calculateMinimumSize(IFigure figure, int w, int h) { |
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47 ScrollPane scrollpane = cast(ScrollPane)figure; |
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48 Insets insets = scrollpane.getInsets(); |
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49 Dimension d = scrollpane.getViewport().getMinimumSize(w, h); |
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50 return d.getExpanded(insets.getWidth(), insets.getHeight()); |
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51 } |
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52 |
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53 /** |
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54 * Calculates and returns the preferred size of the container based on the given hints. |
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55 * If the given ScrollPane's (<i>container</i>) horizontal and vertical scroll bar |
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56 * visibility is not {@link ScrollPane#NEVER}, then space for those bars is always |
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57 * deducted from the hints (whether or not we actually need the scroll bars). |
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58 * |
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59 * @param container the ScrollPane whose preferred size needs to be calculated |
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60 * @param wHint the width hint |
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61 * @param hHint the height hint |
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62 * @return the preferred size of the given container |
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63 * @since 2.0 |
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64 */ |
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65 protected Dimension calculatePreferredSize(IFigure container, int wHint, int hHint) { |
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66 ScrollPane scrollpane = cast(ScrollPane)container; |
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67 ScrollBar hBar = scrollpane.getHorizontalScrollBar(); |
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68 ScrollBar vBar = scrollpane.getVerticalScrollBar(); |
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69 Insets insets = scrollpane.getInsets(); |
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70 |
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71 int reservedWidth = insets.getWidth(); |
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72 int reservedHeight = insets.getHeight(); |
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73 |
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74 if (scrollpane.getVerticalScrollBarVisibility() !is ScrollPane.NEVER) |
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75 reservedWidth += vBar.getPreferredSize().width; |
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76 if (scrollpane.getHorizontalScrollBarVisibility() !is ScrollPane.NEVER) |
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77 reservedHeight += hBar.getPreferredSize().height; |
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78 |
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79 if (wHint > -1) |
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80 wHint = Math.max(0, wHint - reservedWidth); |
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81 if (hHint > -1) |
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82 hHint = Math.max(0, hHint - reservedHeight); |
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83 |
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84 return scrollpane |
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85 .getViewport() |
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86 .getPreferredSize(wHint, hHint) |
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87 .getExpanded(reservedWidth, reservedHeight); |
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88 } |
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89 |
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90 /** |
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91 * @see org.eclipse.draw2d.LayoutManager#layout(IFigure) |
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92 */ |
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93 public void layout(IFigure parent) { |
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94 ScrollPane scrollpane = cast(ScrollPane)parent; |
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95 Viewport viewport = scrollpane.getViewport(); |
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96 ScrollBar hBar = scrollpane.getHorizontalScrollBar(), |
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97 vBar = scrollpane.getVerticalScrollBar(); |
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98 |
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99 ScrollPaneSolver.Result result = ScrollPaneSolver.solve( |
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100 parent.getClientArea(), |
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101 viewport, |
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102 scrollpane.getHorizontalScrollBarVisibility(), |
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103 scrollpane.getVerticalScrollBarVisibility(), |
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104 vBar.getPreferredSize().width, |
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105 hBar.getPreferredSize().height); |
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106 |
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107 if (result.showV) { |
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108 vBar.setBounds(new Rectangle( |
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109 result.viewportArea.right(), |
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110 result.viewportArea.y, |
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111 result.insets.right, |
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112 result.viewportArea.height)); |
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113 } |
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114 if (result.showH) { |
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115 hBar.setBounds(new Rectangle( |
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116 result.viewportArea.x, |
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117 result.viewportArea.bottom(), |
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118 result.viewportArea.width, |
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119 result.insets.bottom)); |
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120 } |
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121 vBar.setVisible(result.showV); |
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122 hBar.setVisible(result.showH); |
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123 |
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124 int vStepInc = vBar.getStepIncrement(); |
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125 int vPageInc = vBar.getRangeModel().getExtent() - vStepInc; |
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126 if (vPageInc < vStepInc) |
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127 vPageInc = vStepInc; |
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128 vBar.setPageIncrement(vPageInc); |
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129 |
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130 int hStepInc = hBar.getStepIncrement(); |
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131 int hPageInc = hBar.getRangeModel().getExtent() - hStepInc; |
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132 if (hPageInc < hStepInc) |
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133 hPageInc = hStepInc; |
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134 hBar.setPageIncrement(hPageInc); |
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135 } |
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136 |
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137 } |