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annotate dwtx/draw2d/Viewport.d @ 192:c3583c6ec027

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Added missing default cases for switch statements
author Frank Benoit <benoit@tionex.de>
date Mon, 03 Nov 2008 22:52:26 +0100
parents 95307ad235d9
children
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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.Viewport;
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14
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15 import dwt.dwthelper.utils;
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16 import dwtx.dwtxhelper.Bean;
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17
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18 import dwtx.draw2d.geometry.Point;
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19 import dwtx.draw2d.geometry.Rectangle;
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20 import dwtx.draw2d.geometry.Translatable;
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21 import dwtx.draw2d.Figure;
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22 import dwtx.draw2d.IFigure;
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23 import dwtx.draw2d.Graphics;
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24 import dwtx.draw2d.RangeModel;
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25 import dwtx.draw2d.ViewportLayout;
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26 import dwtx.draw2d.DefaultRangeModel;
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27
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28 /**
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29 * A Viewport is a flexible window onto a {@link ScrollPane} and represents the visible
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30 * portion of the ScrollPane.
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31 */
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32 public class Viewport
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33 : Figure
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34 , PropertyChangeListener
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35 {
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36
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37 public alias Figure.getClientArea getClientArea;
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38
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39 /** ID for the view location property */
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40 public static final String PROPERTY_VIEW_LOCATION = "viewLocation"; //$NON-NLS-1$
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41 private IFigure view;
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42
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43 private bool useTranslate = false;
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44 private bool trackWidth = false;
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45 private bool trackHeight = false;
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46 private bool ignoreScroll = false;
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47 private RangeModel
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48 horiztonalRangeModel = null,
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49 verticalRangeModel = null;
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50
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51 private void instanceInit(){
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52 setLayoutManager(new ViewportLayout());
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53 setHorizontalRangeModel(new DefaultRangeModel());
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54 setVerticalRangeModel(new DefaultRangeModel());
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55 }
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56
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57 /**
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58 * Constructs a new Viewport with the default values.
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59 */
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60 public this() {
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61 instanceInit();
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62 }
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63
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64 /**
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65 * Constructs a new Viewport. If <i>setting</i> is <code>true</code>, the viewport will
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66 * use graphics translation to paint.
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67 * @param setting whether to use graphics translation
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68 */
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69 public this(bool setting) {
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70 instanceInit();
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71 useTranslate = setting;
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72 }
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73
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74 /**
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75 * @see IFigure#getClientArea(Rectangle)
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76 */
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77 public Rectangle getClientArea(Rectangle rect) {
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78 super.getClientArea(rect);
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79 if (useGraphicsTranslate())
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80 rect.translate(getViewLocation());
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81 return rect;
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82 }
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83
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84 /**
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85 * Returns the view, which is the contents of the {@link ScrollPane} associated with this
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86 * Viewport.
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87 *
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88 * @return the contents
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89 * @since 2.0
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90 */
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91 public IFigure getContents() {
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92 return view;
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93 }
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94
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95 /**
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96 * Returns the RangeModel associated with the horizontal motion of this Viewport
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97 * @return the RangeModel
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98 *
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99 * @since 2.0
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100 */
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101 public RangeModel getHorizontalRangeModel() {
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102 return horiztonalRangeModel;
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103 }
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104
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105 /**
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106 * Returns <code>true</code> if the Viewport resizes itself in the vertical direction when
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107 * the available height of its view is decreased, false otherwise. This option is turned
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108 * off by default, and can be activated by calling
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109 * {@link #setContentsTracksHeight(bool)} and passing in <code>true</code>.
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110 *
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111 * @return whether the contents tracks height
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112 * @since 2.0
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113 */
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114 public bool getContentsTracksHeight() {
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115 return trackHeight;
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116 }
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117
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118 /**
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119 * Returns <code>true</code> if the Viewport resizes itself in the horizontal direction
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120 * when the available width of its view is decreased, false otherwise. This option is
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121 * turned off by default, and can be activated by calling
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122 * {@link #setContentsTracksWidth(bool)} and passing in <code>true</code>.
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123 *
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124 * @return whether the contents tracks width
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125 * @since 2.0
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126 */
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127 public bool getContentsTracksWidth() {
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128 return trackWidth;
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129 }
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130
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131 /**
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132 * Returns the range model associated with the vertical motion of the Viewport.
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133 * @return the RangeModel
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134 *
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135 * @since 2.0
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136 */
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137 public RangeModel getVerticalRangeModel() {
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138 return verticalRangeModel;
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139 }
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140
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141 /**
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142 * Returns the current location of this Viewport.
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143 * @return the current location of this Viewport
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144 *
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145 * @since 2.0
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146 */
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147 public Point getViewLocation() {
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148 return new Point(
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149 getHorizontalRangeModel().getValue(),
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150 getVerticalRangeModel().getValue());
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151 }
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152
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153 private void localRevalidate() {
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154 invalidate();
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155 if (getLayoutManager() !is null)
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156 getLayoutManager().invalidate();
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157 getUpdateManager().addInvalidFigure(this);
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158 }
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159
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160 /**
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161 * @see Figure#paintClientArea(Graphics)
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162 */
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163 protected void paintClientArea(Graphics g) {
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164 if (useGraphicsTranslate()) {
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165 Point p = getViewLocation();
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166 try {
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167 g.translate(-p.x, -p.y);
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168 g.pushState();
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169 super.paintClientArea(g);
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170 g.popState();
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171 } finally {
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172 g.translate(p.x, p.y);
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173 }
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174 } else
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175 super.paintClientArea(g);
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176 }
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177
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178 /**
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179 * @see dwtx.draw2d.Figure#isCoordinateSystem()
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180 */
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181 public bool isCoordinateSystem() {
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182 return useGraphicsTranslate() || super.isCoordinateSystem();
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183 }
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184
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185 /**
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186 * Listens for either of the {@link RangeModel RangeModels} to fire a property change
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187 * event and updates the view accordingly.
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188 * @param event the event
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189 */
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190 public void propertyChange(PropertyChangeEvent event) {
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191 if (null !is cast(RangeModel)(event.getSource()) ) {
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192 if (RangeModel.PROPERTY_VALUE.equals(event.getPropertyName())) {
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193 if (!ignoreScroll) {
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194 localRevalidate();
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195 if (useGraphicsTranslate()) {
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196 repaint();
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197 fireMoved();
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198 }
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199 }
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200 firePropertyChange(PROPERTY_VIEW_LOCATION, event.getOldValue(),
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201 event.getNewValue());
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202 }
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203 }
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204 }
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205
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206 /**
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207 * Sets extents of {@link RangeModel RangeModels} to the client area of this Viewport.
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208 * Sets RangeModel minimums to zero. Sets RangeModel maximums to this Viewport's
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209 * height/width.
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210 *
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211 * @since 2.0
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212 */
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213 protected void readjustScrollBars() {
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214 if (getContents() is null)
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215 return;
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216 getVerticalRangeModel().setAll(0, getClientArea().height,
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217 getContents().getBounds().height);
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218 getHorizontalRangeModel().setAll(0, getClientArea().width,
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219 getContents().getBounds().width);
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220 }
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221
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222 /**
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223 * Sets this Viewport to be associated with the passed Figure.
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224 *
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225 * @param figure the new contents
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226 * @since 2.0
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227 */
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228 public void setContents(IFigure figure) {
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229 if (view is figure)
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230 return;
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231 if (view !is null)
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232 remove(view);
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233 view = figure;
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234 if (view !is null)
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235 add(figure);
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236 }
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237
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238 /**
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239 * Toggles the Viewport's ability to resize itself automatically when its view is
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240 * decreased in size in the vertical direction. This is disabled by default.
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241 *
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242 * @param track whether this viewport should track its height
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243 * @since 2.0
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244 */
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245 public void setContentsTracksHeight(bool track) {
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246 trackHeight = track;
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247 }
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248
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249 /**
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250 * Toggles the Viewport's ability to resize itself automatically when its view is
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251 * decreased in size in the horizontal direction. This is disabled by default.
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252 *
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253 * @param track whether this viewport should track its width
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254 * @since 2.0
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255 */
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256 public void setContentsTracksWidth(bool track) {
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257 trackWidth = track;
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258 }
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259
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260 /**
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261 * Sets the horizontal location of the Viewport's view to the passed value.
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262 *
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263 * @param value the new horizontal location
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264 * @since 2.0
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265 */
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266 public void setHorizontalLocation(int value) {
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267 setViewLocation(value, getVerticalRangeModel().getValue());
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268 }
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269
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270 /**
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271 * Sets the horizontal range model to the passed RangeModel.
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272 *
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273 * @param rangeModel the new horizontal range model
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274 * @since 2.0
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275 */
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276 public void setHorizontalRangeModel(RangeModel rangeModel) {
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277 if (horiztonalRangeModel !is null)
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278 horiztonalRangeModel.removePropertyChangeListener(this);
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279 horiztonalRangeModel = rangeModel;
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280 horiztonalRangeModel.addPropertyChangeListener(this);
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281 }
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282
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283 /**
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284 * If <i>value</i> is <code>true</code>, this viewport will ignore any scrolling that
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285 * occurs until this method is called again with <code>false</code>.
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286 *
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287 * @param value whether this viewport should ignore future scrolls
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288 */
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289 public void setIgnoreScroll(bool value) {
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290 ignoreScroll = value;
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291 }
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292
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293 /**
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294 * Sets the vertical location of the Viewport's view to the passed value.
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295 *
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296 * @param value the new vertical location
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297 * @since 2.0
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298 */
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299 public void setVerticalLocation(int value) {
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300 setViewLocation(getHorizontalRangeModel().getValue(), value);
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301 }
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302
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303 /**
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304 * Sets the vertical range model to the passed RangeModel.
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305 *
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306 * @param rangeModel the new vertical RangeModel
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307 * @since 2.0
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308 */
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309 public void setVerticalRangeModel(RangeModel rangeModel) {
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310 if (verticalRangeModel !is null)
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311 verticalRangeModel.removePropertyChangeListener(this);
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312 verticalRangeModel = rangeModel;
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313 verticalRangeModel.addPropertyChangeListener(this);
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314 }
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315
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316 /**
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317 * Sets the location of the Viewport's view to the passed values.
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318 *
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319 * @param x The new x coordinate of the Viewport's view.
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320 * @param y The new y coordinate of the Viewport's view.
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321 * @since 2.0
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322 */
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323 public void setViewLocation(int x, int y) {
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324 if (getHorizontalRangeModel().getValue() !is x)
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325 getHorizontalRangeModel().setValue(x);
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326 if (getVerticalRangeModel().getValue() !is y)
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327 getVerticalRangeModel().setValue(y);
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328 }
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329
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330 /**
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331 * Sets the location of the Viewport's view to the passed Point.
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332 *
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333 * @param p The new location of the Viewport's view.
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334 * @since 2.0
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335 */
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336 public void setViewLocation(Point p) {
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337 setViewLocation(p.x, p.y);
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338 }
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339
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340 /**
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341 * @see IFigure#translateFromParent(Translatable)
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342 */
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343 public void translateFromParent(Translatable t) {
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344 if (useTranslate)
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345 t.performTranslate(
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346 getHorizontalRangeModel().getValue(),
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347 getVerticalRangeModel().getValue()
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348 );
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349 super.translateFromParent(t);
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350 }
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351
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352 /**
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353 * @see IFigure#translateToParent(Translatable)
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354 */
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355 public void translateToParent(Translatable t) {
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356 if (useTranslate)
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357 t.performTranslate(
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358 -getHorizontalRangeModel().getValue(),
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359 -getVerticalRangeModel().getValue()
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360 );
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361 super.translateToParent(t);
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362 }
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363
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364 /**
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365 * Returns <code>true</code> if this viewport uses graphics translation.
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366 * @return whether this viewport uses graphics translation
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367 */
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368 public bool useGraphicsTranslate() {
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369 return useTranslate;
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370 }
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371
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372 /**
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373 * @see IFigure#validate()
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374 */
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375 public void validate() {
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376 super.validate();
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377 readjustScrollBars();
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378 }
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379
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380 }