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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/ImageFigure.d @ 104:88652073d1c2

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More work on icu
author Frank Benoit <benoit@tionex.de>
date Sat, 02 May 2009 11:27:24 +0200
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.ImageFigure;
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14
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15 import java.lang.all;
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17
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18
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19 import org.eclipse.swt.graphics.Image;
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20 import org.eclipse.draw2d.geometry.Dimension;
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21 import org.eclipse.draw2d.geometry.Insets;
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22 import org.eclipse.draw2d.geometry.Rectangle;
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23 import org.eclipse.draw2d.IFigure;
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24 import org.eclipse.draw2d.Figure;
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25 import org.eclipse.draw2d.Graphics;
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26 import org.eclipse.draw2d.PositionConstants;
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27
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28 /**
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29 * A Figure that simply contains an Image. Use this Figure, instead of a Label, when
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30 * displaying Images without any accompanying text. This figure is not intended to have a
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31 * layout mananger or children.
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32 * <P>
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33 * Note that it is the client's responsibility to dispose the given image. There is no
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34 * "free" resource management in draw2d.
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35 *
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36 * @author Pratik Shah
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37 */
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38 public class ImageFigure
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39 : Figure
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40 {
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41
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42 private Image img;
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43 private Dimension size;
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44 private int alignment;
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45
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46 /**
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47 * Constructor<br>
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48 * The default alignment is <code>PositionConstants.CENTER</code>.
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49 */
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50 public this() {
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51 this(null, PositionConstants.CENTER);
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52 }
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53
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54 /**
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55 * Constructor<br>
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56 * The default alignment is <code>PositionConstants.CENTER</code>.
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57 *
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58 * @param image The Image to be displayed
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59 */
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60 public this(Image image) {
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61 this(image, PositionConstants.CENTER);
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62 }
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63
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64 /**
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65 * Constructor
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66 *
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67 * @param image The Image to be displayed
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68 * @param alignment A PositionConstant indicating the alignment
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69 *
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70 * @see ImageFigure#setImage(Image)
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71 * @see ImageFigure#setAlignment(int)
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72 */
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73 public this(Image image, int alignment) {
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74 size = new Dimension();
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75 setImage(image);
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76 setAlignment(alignment);
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77 }
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78
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79 /**
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80 * @return The Image that this Figure displays
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81 */
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82 public Image getImage() {
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83 return img;
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84 }
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85
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86 /**
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87 * Calculates the necessary size to display the Image within the figure's client area.
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88 *
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89 * @see org.eclipse.draw2d.Figure#getPreferredSize(int, int)
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90 */
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91 public Dimension getPreferredSize(int wHint, int hHint) {
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92 if (getInsets() is IFigure_NO_INSETS)
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93 return size;
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94 Insets i = getInsets();
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95 return size.getExpanded(i.getWidth(), i.getHeight());
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96 }
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97
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98 /**
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99 * @see org.eclipse.draw2d.Figure#paintFigure(Graphics)
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100 */
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101 protected void paintFigure(Graphics graphics) {
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102 super.paintFigure(graphics);
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103
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104 if (getImage() is null)
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105 return;
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106
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107 int x, y;
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108 Rectangle area = getClientArea();
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109 switch (alignment & PositionConstants.NORTH_SOUTH) {
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110 case PositionConstants.NORTH:
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111 y = area.y;
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112 break;
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113 case PositionConstants.SOUTH:
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114 y = area.y + area.height - size.height;
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115 break;
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116 default:
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117 y = (area.height - size.height) / 2 + area.y;
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118 break;
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119 }
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120 switch (alignment & PositionConstants.EAST_WEST) {
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121 case PositionConstants.EAST:
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122 x = area.x + area.width - size.width;
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123 break;
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124 case PositionConstants.WEST:
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125 x = area.x;
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126 break;
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127 default:
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128 x = (area.width - size.width) / 2 + area.x;
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129 break;
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130 }
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131 graphics.drawImage(getImage(), x, y);
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132 }
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133
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134 /**
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135 * Sets the alignment of the Image within this Figure. The alignment comes into play
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136 * when the ImageFigure is larger than the Image. The alignment could be any valid
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137 * combination of the following:
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138 *
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139 * <UL>
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140 * <LI>PositionConstants.NORTH</LI>
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141 * <LI>PositionConstants.SOUTH</LI>
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142 * <LI>PositionConstants.EAST</LI>
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143 * <LI>PositionConstants.WEST</LI>
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144 * <LI>PositionConstants.CENTER or PositionConstants.NONE</LI>
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145 * </UL>
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146 *
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147 * @param flag A constant indicating the alignment
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148 */
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149 public void setAlignment(int flag) {
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150 alignment = flag;
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151 }
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152
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153 /**
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154 * Sets the Image that this ImageFigure displays.
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155 * <p>
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156 * IMPORTANT: Note that it is the client's responsibility to dispose the given image.
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157 *
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158 * @param image The Image to be displayed. It can be <code>null</code>.
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159 */
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160 public void setImage(Image image) {
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161 if (img is image)
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162 return;
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163 img = image;
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164 if (img !is null)
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165 size = (new Rectangle(image.getBounds())).getSize();
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166 else
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167 size = new Dimension();
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168 revalidate();
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169 repaint();
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170 }
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171
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172 }