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Upload of whole dwt tree
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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children 2952d5604c0a
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 *******************************************************************************/
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11 module dwt.widgets.Event;
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12
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13 import dwt.dwthelper.utils;
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14
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15
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16 import dwt.graphics.GC;
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17 import dwt.graphics.Rectangle;
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18
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19 /**
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20 * Instances of this class provide a description of a particular
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21 * event which occurred within DWT. The DWT <em>untyped listener</em>
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22 * API uses these instances for all event dispatching.
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23 * <p>
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24 * Note: For a given event, only the fields which are appropriate
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25 * will be filled in. The contents of the fields which are not used
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26 * by the event are unspecified.
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27 * </p>
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28 *
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29 * @see Listener
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30 * @see dwt.events.TypedEvent
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31 */
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32
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33 public class Event {
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34
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35 /**
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36 * the display where the event occurred
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37 *
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38 * @since 2.0
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39 */
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40 public Display display;
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41
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42 /**
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43 * the widget that issued the event
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44 */
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45 public Widget widget;
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46
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47 /**
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48 * the type of event, as defined by the event type constants
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49 * in class <code>DWT</code>
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50 *
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51 * @see dwt.DWT
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52 */
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53 public int type;
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54
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55 /**
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56 * the event specific detail field, as defined by the detail constants
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57 * in class <code>DWT</code>
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58 *
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59 * @see dwt.DWT
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60 */
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61 public int detail;
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62
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63 /**
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64 * the item that the event occurred in (can be null)
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65 */
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66 public Widget item;
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67
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68 /**
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69 * the index of the item where the event occurred
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70 *
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71 * @since 3.2
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72 */
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73 public int index;
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74
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75 /**
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76 * the graphics context to use when painting
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77 * that is configured to use the colors, font and
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78 * damaged region of the control. It is valid
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79 * only during the paint and must not be disposed
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80 */
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81 public GC gc;
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82
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83 /**
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84 * depending on the event type, the x offset of the bounding
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85 * rectangle of the region that requires painting or the
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86 * widget-relative, x coordinate of the pointer at the
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87 * time the mouse button was pressed or released
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88 */
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89 public int x;
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90
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91 /**
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92 * depending on the event type, the y offset of the bounding
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93 * rectangle of the region that requires painting or the
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94 * widget-relative, y coordinate of the pointer at the
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95 * time the mouse button was pressed or released
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96 */
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97 public int y;
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98
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99 /**
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100 * the width of the bounding rectangle of the
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101 * region that requires painting
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102 */
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103 public int width;
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104
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105 /**
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106 * the height of the bounding rectangle of the
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107 * region that requires painting
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108 */
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109 public int height;
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110
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111 /**
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112 * depending on the event type, the number of following
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113 * paint events which are pending which may always be zero
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114 * on some platforms or the number of lines or pages to
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115 * scroll using the mouse wheel
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116 */
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117 public int count;
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118
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119 /**
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120 * the time that the event occurred.
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121 *
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122 * NOTE: This field is an unsigned integer and should
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123 * be AND'ed with 0xFFFFFFFFL so that it can be treated
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124 * as a signed long.
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125 */
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126 public int time;
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127
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128 /**
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129 * the button that was pressed or released; 1 for the
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130 * first button, 2 for the second button, and 3 for the
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131 * third button, etc.
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132 */
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133 public int button;
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134
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135 /**
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136 * depending on the event, the character represented by the key
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137 * that was typed. This is the final character that results
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138 * after all modifiers have been applied. For example, when the
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139 * user types Ctrl+A, the character value is 0x01 (ASCII SOH).
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140 * It is important that applications do not attempt to modify the
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141 * character value based on a stateMask (such as DWT.CTRL) or the
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142 * resulting character will not be correct.
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143 */
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144 public char character;
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145
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146 /**
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147 * depending on the event, the key code of the key that was typed,
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148 * as defined by the key code constants in class <code>DWT</code>.
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149 * When the character field of the event is ambiguous, this field
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150 * contains the unaffected value of the original character. For
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151 * example, typing Ctrl+M or Enter both result in the character '\r'
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152 * but the keyCode field will also contain '\r' when Enter was typed
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153 * and 'm' when Ctrl+M was typed.
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154 *
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155 * @see dwt.DWT
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156 */
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157 public int keyCode;
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158
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159 /**
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160 * depending on the event, the state of the keyboard modifier
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161 * keys and mouse masks at the time the event was generated.
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162 *
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163 * @see dwt.DWT
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164 */
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165 public int stateMask;
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166
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167 /**
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168 * depending on the event, the range of text being modified.
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169 * Setting these fields has no effect.
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170 */
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171 public int start, end;
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172
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173 /**
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174 * depending on the event, the new text that will be inserted.
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175 * Setting this field will change the text that is about to
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176 * be inserted or deleted.
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177 */
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178 public String text;
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179
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180 /**
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181 * depending on the event, a flag indicating whether the operation
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182 * should be allowed. Setting this field to false will cancel the
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183 * operation.
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184 */
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185 public bool doit = true;
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186
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187 /**
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188 * a field for application use
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189 */
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190 public Object data;
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191
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192 /**
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193 * Gets the bounds.
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194 *
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195 * @return a rectangle that is the bounds.
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196 */
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197 public Rectangle getBounds () {
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198 return new Rectangle (x, y, width, height);
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199 }
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200
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201 /**
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202 * Sets the bounds.
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203 *
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204 * @param rect the new rectangle
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205 */
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206 public void setBounds (Rectangle rect) {
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207 this.x = rect.x;
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208 this.y = rect.y;
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209 this.width = rect.width;
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210 this.height = rect.height;
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211 }
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212
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213 /**
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214 * Returns a string containing a concise, human-readable
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215 * description of the receiver.
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216 *
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217 * @return a string representation of the event
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218 */
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219 public String toString () {
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220 return "Event {type=" + type + " " + widget + " time=" + time + " data=" + data + " x=" + x + " y=" + y + " width=" + width + " height=" + height + " detail=" + detail + "}"; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ //$NON-NLS-7$
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221 }
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222 }