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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 649b8e223d5a 2952d5604c0a
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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 *******************************************************************************/
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11 module dwt.widgets.Tray;
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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.DWT;
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17 import dwt.DWTException;
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18
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19 /**
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20 * Instances of this class represent the system tray that is part
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21 * of the task bar status area on some operating systems.
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22 *
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23 * <dl>
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24 * <dt><b>Styles:</b></dt>
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25 * <dd>(none)</dd>
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26 * <dt><b>Events:</b></dt>
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27 * <dd>(none)</dd>
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28 * </dl>
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29 * <p>
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30 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
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31 * </p>
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32 *
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33 * @see Display#getSystemTray
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34 *
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35 * @since 3.0
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36 */
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37 public class Tray extends Widget {
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38 int itemCount;
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39 TrayItem [] items = new TrayItem [4];
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40
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41 Tray (Display display, int style) {
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42 if (display is null) display = Display.getCurrent ();
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43 if (display is null) display = Display.getDefault ();
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44 if (!display.isValidThread ()) {
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45 error (DWT.ERROR_THREAD_INVALID_ACCESS);
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46 }
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47 this.display = display;
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48 }
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49
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50 void createItem (TrayItem item, int index) {
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51 if (!(0 <= index && index <= itemCount)) error (DWT.ERROR_INVALID_RANGE);
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52 if (itemCount is items.length) {
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53 TrayItem [] newItems = new TrayItem [items.length + 4];
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54 System.arraycopy (items, 0, newItems, 0, items.length);
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55 items = newItems;
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56 }
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57 System.arraycopy (items, index, items, index + 1, itemCount++ - index);
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58 items [index] = item;
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59 }
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60
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61 void destroyItem (TrayItem item) {
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62 int index = 0;
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63 while (index < itemCount) {
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64 if (items [index] is item) break;
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65 index++;
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66 }
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67 if (index is itemCount) return;
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68 System.arraycopy (items, index + 1, items, index, --itemCount - index);
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69 items [itemCount] = null;
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70 }
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71
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72 /**
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73 * Returns the item at the given, zero-relative index in the
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74 * receiver. Throws an exception if the index is out of range.
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75 *
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76 * @param index the index of the item to return
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77 * @return the item at the given index
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78 *
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79 * @exception IllegalArgumentException <ul>
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80 * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
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81 * </ul>
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82 * @exception DWTException <ul>
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83 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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84 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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85 * </ul>
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86 */
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87 public TrayItem getItem (int index) {
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88 checkWidget ();
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89 if (!(0 <= index && index < itemCount)) error (DWT.ERROR_INVALID_RANGE);
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90 return items [index];
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91 }
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92
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93 /**
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94 * Returns the number of items contained in the receiver.
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95 *
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96 * @return the number of items
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97 *
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98 * @exception DWTException <ul>
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99 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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100 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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101 * </ul>
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102 */
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103 public int getItemCount () {
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104 checkWidget ();
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105 return itemCount;
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106 }
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107
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108 /**
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109 * Returns an array of <code>TrayItem</code>s which are the items
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110 * in the receiver.
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111 * <p>
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112 * Note: This is not the actual structure used by the receiver
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113 * to maintain its list of items, so modifying the array will
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114 * not affect the receiver.
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115 * </p>
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116 *
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117 * @return the items in the receiver
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118 *
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119 * @exception DWTException <ul>
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120 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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121 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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122 * </ul>
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123 */
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124 public TrayItem [] getItems () {
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125 checkWidget ();
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126 TrayItem [] result = new TrayItem [itemCount];
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127 System.arraycopy (items, 0, result, 0, result.length);
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128 return result;
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129 }
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130
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131 void releaseChildren (bool destroy) {
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132 if (items !is null) {
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133 for (int i=0; i<items.length; i++) {
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134 TrayItem item = items [i];
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135 if (item !is null && !item.isDisposed ()) {
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136 item.release (false);
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137 }
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138 }
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139 items = null;
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140 }
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141 super.releaseChildren (destroy);
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142 }
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143
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144 void releaseParent () {
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145 super.releaseParent ();
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146 if (display.tray is this) display.tray = null;
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147 }
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148
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149 }