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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/parts/ScrollableThumbnail.d @ 16:dbfb303e8fb0

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first complete successful compile (win-only)
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 08:56:47 +0100
parents bc29606a740c
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 org.eclipse.draw2d.parts.ScrollableThumbnail;
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14
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15 import java.lang.all;
16
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16 import java.beans.PropertyChangeListener;
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17 import java.beans.PropertyChangeEvent;
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18
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19 import org.eclipse.swt.SWT;
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20 import org.eclipse.swt.graphics.Image;
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21 import org.eclipse.swt.graphics.ImageData;
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22 import org.eclipse.swt.graphics.PaletteData;
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23 import org.eclipse.swt.graphics.RGB;
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24 import org.eclipse.swt.widgets.Display;
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25 import org.eclipse.draw2d.ColorConstants;
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26 import org.eclipse.draw2d.Figure;
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27 import org.eclipse.draw2d.FigureListener;
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28 import org.eclipse.draw2d.Graphics;
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29 import org.eclipse.draw2d.IFigure;
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30 import org.eclipse.draw2d.KeyEvent;
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31 import org.eclipse.draw2d.KeyListener;
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32 import org.eclipse.draw2d.MouseEvent;
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33 import org.eclipse.draw2d.MouseListener;
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34 import org.eclipse.draw2d.MouseMotionListener;
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35 import org.eclipse.draw2d.Viewport;
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36 import org.eclipse.draw2d.geometry.Dimension;
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37 import org.eclipse.draw2d.geometry.Point;
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38 import org.eclipse.draw2d.geometry.Rectangle;
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39 import org.eclipse.draw2d.parts.Thumbnail;
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40
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41 /**
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42 * A scaled image representation of a Figure. If the source Figure is not completely
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43 * visible, a SelectorFigure is placed over the thumbnail representing the viewable area
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44 * and can be dragged around to scroll the source figure.
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45 */
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46 public final class ScrollableThumbnail
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47 : Thumbnail
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48 {
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49
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50 private class ClickScrollerAndDragTransferrer
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51 : MouseMotionListener.Stub
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52 , MouseListener
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53 {
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54 private bool dragTransfer;
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55 public void mouseDoubleClicked(MouseEvent me) { }
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56 public void mouseDragged(MouseEvent me) {
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57 if (dragTransfer)
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58 syncher.mouseDragged(me);
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59 }
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60 public void mousePressed(MouseEvent me) {
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61 if (!(this.outer.getClientArea().contains(me.getLocation())))
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62 return;
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63 Dimension selectorCenter = selector.getBounds().getSize().scale(0.5f);
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64 Point scrollPoint = me.getLocation()
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65 .getTranslated(getLocation().getNegated())
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66 .translate(selectorCenter.negate())
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67 .scale(1.0f / getViewportScaleX(), 1.0f / getViewportScaleY())
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68 .translate(
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69 viewport.getHorizontalRangeModel().getMinimum(),
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70 viewport.getVerticalRangeModel().getMinimum());
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71 viewport.setViewLocation(scrollPoint);
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72 syncher.mousePressed(me);
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73 dragTransfer = true;
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74 }
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75 public void mouseReleased(MouseEvent me) {
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76 syncher.mouseReleased(me);
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77 dragTransfer = false;
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78 }
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79 }
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80
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81 private class ScrollSynchronizer
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82 : MouseMotionListener.Stub
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83 , MouseListener
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84 {
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85 private Point startLocation;
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86 private Point viewLocation;
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87
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88 public void mouseDoubleClicked(MouseEvent me) { }
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89
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90 public void mouseDragged(MouseEvent me) {
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91 Dimension d = me.getLocation().getDifference(startLocation);
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92 d.scale(1.0f / getViewportScaleX(), 1.0f / getViewportScaleY());
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93 viewport.setViewLocation(viewLocation.getTranslated(d));
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94 me.consume();
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95 }
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96
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97 public void mousePressed(MouseEvent me) {
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98 startLocation = me.getLocation();
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99 viewLocation = viewport.getViewLocation();
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100 me.consume();
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101 }
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102
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103 public void mouseReleased(MouseEvent me) { }
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104 }
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105
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106 private class SelectorFigure
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107 : Figure
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108 {
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109 this(){
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110 iBounds = new Rectangle(0, 0, 1, 1);
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111 Display display = Display.getCurrent();
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112 PaletteData pData = new PaletteData(0xFF, 0xFF00, 0xFF0000);
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113 RGB rgb = ColorConstants.menuBackgroundSelected.getRGB();
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114 int fillColor = pData.getPixel(rgb);
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115 ImageData iData = new ImageData(1, 1, 24, pData);
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116 iData.setPixel(0, 0, fillColor);
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117 iData.setAlpha(0, 0, 55);
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118 image = new Image(display, iData);
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119 }
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120 private Rectangle iBounds;
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121
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122 private Image image;
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123
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124 protected void dispose() {
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125 image.dispose();
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126 }
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127
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128 public void paintFigure(Graphics g) {
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129 Rectangle bounds = getBounds().getCopy();
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130
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131 // Avoid drawing images that are 0 in dimension
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132 if (bounds.width < 5 || bounds.height < 5)
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133 return;
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134
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135 // Don't paint the selector figure if the entire source is visible.
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136 Dimension thumbnailSize = new Dimension(getThumbnailImage());
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137 // expand to compensate for rounding errors in calculating bounds
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138 Dimension size = getSize().getExpanded(1, 1);
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139 if (size.contains(thumbnailSize))
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140 return;
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141
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142 bounds.height--;
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143 bounds.width--;
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144 g.drawImage(image, iBounds, bounds);
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145
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146 g.setForegroundColor(ColorConstants.menuBackgroundSelected);
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147 g.drawRectangle(bounds);
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148 }
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149
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150 }
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151 private FigureListener figureListener;
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152 private void initFigureListener(){
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153 figureListener = new class() FigureListener {
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154 public void figureMoved(IFigure source) {
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155 reconfigureSelectorBounds();
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156 }
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157 };
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158 }
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159 private KeyListener keyListener;
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160 private void initKeyListener(){
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161 keyListener = new class() KeyListenerStub {
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162 public void keyPressed(KeyEvent ke) {
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163 int moveX = viewport.getClientArea().width / 4;
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164 int moveY = viewport.getClientArea().height / 4;
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165 if (ke.keycode is SWT.HOME || (isMirrored() ? ke.keycode is SWT.ARROW_RIGHT
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166 : ke.keycode is SWT.ARROW_LEFT))
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167 viewport.setViewLocation(viewport.getViewLocation().translate(-moveX, 0));
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168 else if (ke.keycode is SWT.END || (isMirrored() ? ke.keycode is SWT.ARROW_LEFT
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169 : ke.keycode is SWT.ARROW_RIGHT))
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170 viewport.setViewLocation(viewport.getViewLocation().translate(moveX, 0));
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171 else if (ke.keycode is SWT.ARROW_UP || ke.keycode is SWT.PAGE_UP)
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172 viewport.setViewLocation(viewport.getViewLocation().translate(0, -moveY));
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173 else if (ke.keycode is SWT.ARROW_DOWN || ke.keycode is SWT.PAGE_DOWN)
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174 viewport.setViewLocation(viewport.getViewLocation().translate(0, moveY));
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175 }
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176 };
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177 }
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178
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179 private PropertyChangeListener propListener;
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180 private void initPropListener(){
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181 propListener = new class() PropertyChangeListener {
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182 public void propertyChange(PropertyChangeEvent evt) {
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183 reconfigureSelectorBounds();
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184 }
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185 };
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186 }
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187
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188 private SelectorFigure selector;
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189
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190 private ScrollSynchronizer syncher;
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191 private Viewport viewport;
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192
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193 /**
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194 * Creates a new ScrollableThumbnail.
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195 */
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196 public this() {
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197 super();
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198 initFigureListener();
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199 initKeyListener();
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200 initPropListener();
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201 initialize();
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202 }
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203
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204 /**
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205 * Creates a new ScrollableThumbnail that synchs with the given Viewport.
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206 * @param port The Viewport
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207 */
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208 public this(Viewport port) {
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209 super();
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210 initFigureListener();
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211 initKeyListener();
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212 initPropListener();
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213 setViewport(port);
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214 initialize();
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215 }
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216
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217 /**
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218 * @see Thumbnail#deactivate()
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219 */
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220 public void deactivate() {
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221 viewport.removePropertyChangeListener(Viewport.PROPERTY_VIEW_LOCATION, propListener);
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222 viewport.removeFigureListener(figureListener);
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223 remove(selector);
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224 selector.dispose();
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225 super.deactivate();
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226 }
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227
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228 private double getViewportScaleX() {
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229 return cast(double)targetSize.width / viewport.getContents().getBounds().width;
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230 }
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231
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232 private double getViewportScaleY() {
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233 return cast(double)targetSize.height / viewport.getContents().getBounds().height;
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234 }
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235
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236 private void initialize() {
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237 selector = new SelectorFigure();
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238 selector.addMouseListener(syncher = new ScrollSynchronizer());
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239 selector.addMouseMotionListener(syncher);
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240 selector.setFocusTraversable(true);
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241 selector.addKeyListener(keyListener);
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242 add(selector);
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243 ClickScrollerAndDragTransferrer transferrer =
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244 new ClickScrollerAndDragTransferrer();
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245 addMouseListener(transferrer);
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246 addMouseMotionListener(transferrer);
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247 }
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248
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249 private void reconfigureSelectorBounds() {
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250 Rectangle rect = new Rectangle();
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251 Point offset = viewport.getViewLocation();
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252 offset.x -= viewport.getHorizontalRangeModel().getMinimum();
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253 offset.y -= viewport.getVerticalRangeModel().getMinimum();
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254 rect.setLocation(offset);
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255 rect.setSize(viewport.getClientArea().getSize());
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256 rect.scale(getViewportScaleX(), getViewportScaleY());
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257 rect.translate(getClientArea().getLocation());
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258 selector.setBounds(rect);
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259 }
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260
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261 /**
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262 * Reconfigures the SelectorFigure's bounds if the scales have changed.
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263 * @param scaleX The X scale
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264 * @param scaleY The Y scale
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265 * @see org.eclipse.draw2d.parts.Thumbnail#setScales(float, float)
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266 */
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267 protected void setScales(float scaleX, float scaleY) {
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268 if (scaleX is getScaleX() && scaleY is getScaleY())
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269 return;
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270
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271 super.setScales(scaleX, scaleY);
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272 reconfigureSelectorBounds();
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273 }
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274
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275 /**
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276 * Sets the Viewport that this ScrollableThumbnail will synch with.
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277 * @param port The Viewport
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278 */
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279 public void setViewport(Viewport port) {
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280 port.addPropertyChangeListener(Viewport.PROPERTY_VIEW_LOCATION, propListener);
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281 port.addFigureListener(figureListener);
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282 viewport = port;
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283 }
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284
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285 }