Mercurial > projects > dwt-mac
annotate dwt/widgets/CoolItem.d @ 0:380af2bdd8e5
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author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Sat, 09 Aug 2008 17:00:02 +0200 |
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children | 649b8e223d5a |
rev | line source |
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0
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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.CoolItem; |
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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 import dwt.events.SelectionEvent; |
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19 import dwt.events.SelectionListener; |
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20 import dwt.graphics.Color; |
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21 import dwt.graphics.GC; |
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22 import dwt.graphics.Image; |
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23 import dwt.graphics.ImageData; |
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24 import dwt.graphics.PaletteData; |
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25 import dwt.graphics.Point; |
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26 import dwt.graphics.RGB; |
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27 import dwt.graphics.Rectangle; |
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28 |
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29 /** |
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30 * Instances of this class are selectable user interface |
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31 * objects that represent the dynamically positionable |
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32 * areas of a <code>CoolBar</code>. |
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33 * <dl> |
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34 * <dt><b>Styles:</b></dt> |
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35 * <dd>DROP_DOWN</dd> |
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36 * <dt><b>Events:</b></dt> |
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37 * <dd>Selection</dd> |
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38 * </dl> |
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39 * <p> |
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40 * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
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41 * </p> |
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42 */ |
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43 public class CoolItem extends Item { |
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44 Control control; |
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45 CoolBar parent; |
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46 bool ideal; |
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47 int preferredWidth, preferredHeight, minimumWidth, minimumHeight, requestedWidth; |
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48 Rectangle itemBounds = new Rectangle(0, 0, 0, 0); |
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49 |
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50 static final int MARGIN_WIDTH = 4; |
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51 static final int GRABBER_WIDTH = 2; |
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52 static final int MINIMUM_WIDTH = (2 * MARGIN_WIDTH) + GRABBER_WIDTH; |
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53 |
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54 private int CHEVRON_HORIZONTAL_TRIM = -1; //platform dependent values |
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55 private int CHEVRON_VERTICAL_TRIM = -1; |
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56 private static final int CHEVRON_LEFT_MARGIN = 2; |
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57 private static final int CHEVRON_IMAGE_WIDTH = 8; //Width to draw the double arrow |
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58 |
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59 ToolBar chevron; |
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60 bool wrap; |
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61 Image arrowImage = null; |
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62 |
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63 /** |
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64 * Constructs a new instance of this class given its parent |
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65 * (which must be a <code>CoolBar</code>) and a style value |
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66 * describing its behavior and appearance. The item is added |
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67 * to the end of the items maintained by its parent. |
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68 * <p> |
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69 * The style value is either one of the style constants defined in |
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70 * class <code>DWT</code> which is applicable to instances of this |
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71 * class, or must be built by <em>bitwise OR</em>'ing together |
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72 * (that is, using the <code>int</code> "|" operator) two or more |
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73 * of those <code>DWT</code> style constants. The class description |
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74 * lists the style constants that are applicable to the class. |
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75 * Style bits are also inherited from superclasses. |
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76 * </p> |
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77 * |
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78 * @param parent a composite control which will be the parent of the new instance (cannot be null) |
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79 * @param style the style of control to construct |
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80 * |
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81 * @exception IllegalArgumentException <ul> |
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82 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
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83 * </ul> |
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84 * @exception DWTException <ul> |
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85 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
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86 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
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87 * </ul> |
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88 * |
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89 * @see DWT#DROP_DOWN |
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90 * @see Widget#checkSubclass |
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91 * @see Widget#getStyle |
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92 */ |
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93 public CoolItem (CoolBar parent, int style) { |
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94 super(parent, style); |
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95 this.parent = parent; |
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96 parent.createItem (this, parent.getItemCount()); |
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97 calculateChevronTrim (); |
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98 } |
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99 /** |
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100 * Constructs a new instance of this class given its parent |
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101 * (which must be a <code>CoolBar</code>), a style value |
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102 * describing its behavior and appearance, and the index |
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103 * at which to place it in the items maintained by its parent. |
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104 * <p> |
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105 * The style value is either one of the style constants defined in |
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106 * class <code>DWT</code> which is applicable to instances of this |
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107 * class, or must be built by <em>bitwise OR</em>'ing together |
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108 * (that is, using the <code>int</code> "|" operator) two or more |
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109 * of those <code>DWT</code> style constants. The class description |
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110 * lists the style constants that are applicable to the class. |
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111 * Style bits are also inherited from superclasses. |
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112 * </p> |
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113 * |
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114 * @param parent a composite control which will be the parent of the new instance (cannot be null) |
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115 * @param style the style of control to construct |
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116 * @param index the zero-relative index at which to store the receiver in its parent |
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117 * |
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118 * @exception IllegalArgumentException <ul> |
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119 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
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120 * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</li> |
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121 * </ul> |
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122 * @exception DWTException <ul> |
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123 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
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124 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
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125 * </ul> |
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126 * |
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127 * @see DWT#DROP_DOWN |
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128 * @see Widget#checkSubclass |
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129 * @see Widget#getStyle |
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130 */ |
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131 public CoolItem (CoolBar parent, int style, int index) { |
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132 super(parent, style); |
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133 this.parent = parent; |
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134 parent.createItem (this, index); |
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135 calculateChevronTrim (); |
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136 } |
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137 /** |
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138 * Adds the listener to the collection of listeners that will |
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139 * be notified when the control is selected by the user, by sending it one |
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140 * of the messages defined in the <code>SelectionListener</code> |
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141 * interface. |
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142 * <p> |
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143 * If <code>widgetSelected</code> is called when the mouse is over |
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144 * the drop-down arrow (or 'chevron') portion of the cool item, |
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145 * the event object detail field contains the value <code>DWT.ARROW</code>, |
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146 * and the x and y fields in the event object represent the point at |
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147 * the bottom left of the chevron, where the menu should be popped up. |
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148 * <code>widgetDefaultSelected</code> is not called. |
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149 * </p> |
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150 * |
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151 * @param listener the listener which should be notified when the control is selected by the user |
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152 * |
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153 * @exception IllegalArgumentException <ul> |
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154 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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155 * </ul> |
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156 * @exception DWTException <ul> |
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157 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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158 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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159 * </ul> |
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160 * |
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161 * @see SelectionListener |
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162 * @see #removeSelectionListener |
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163 * @see SelectionEvent |
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164 * |
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165 * @since 2.0 |
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166 */ |
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167 public void addSelectionListener(SelectionListener listener) { |
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168 checkWidget(); |
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169 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); |
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170 TypedListener typedListener = new TypedListener (listener); |
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171 addListener (DWT.Selection,typedListener); |
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172 addListener (DWT.DefaultSelection,typedListener); |
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173 } |
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174 protected void checkSubclass () { |
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175 if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS); |
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176 } |
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177 /* |
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178 * Find the trim size of the Toolbar widget in the current platform. |
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179 */ |
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180 void calculateChevronTrim () { |
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181 ToolBar tb = new ToolBar (parent, DWT.FLAT); |
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182 ToolItem ti = new ToolItem (tb, DWT.PUSH); |
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183 Image image = new Image (display, 1, 1); |
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184 ti.setImage (image); |
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185 Point size = tb.computeSize (DWT.DEFAULT, DWT.DEFAULT); |
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186 size = parent.fixPoint(size.x, size.y); |
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187 CHEVRON_HORIZONTAL_TRIM = size.x - 1; |
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188 CHEVRON_VERTICAL_TRIM = size.y - 1; |
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189 tb.dispose (); |
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190 ti.dispose (); |
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191 image.dispose (); |
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192 } |
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193 /** |
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194 * Returns the preferred size of the receiver. |
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195 * <p> |
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196 * The <em>preferred size</em> of a <code>CoolItem</code> is the size that |
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197 * it would best be displayed at. The width hint and height hint arguments |
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198 * allow the caller to ask the instance questions such as "Given a particular |
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199 * width, how high does it need to be to show all of the contents?" |
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200 * To indicate that the caller does not wish to constrain a particular |
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201 * dimension, the constant <code>DWT.DEFAULT</code> is passed for the hint. |
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202 * </p> |
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203 * |
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204 * @param wHint the width hint (can be <code>DWT.DEFAULT</code>) |
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205 * @param hHint the height hint (can be <code>DWT.DEFAULT</code>) |
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206 * @return the preferred size |
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207 * |
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208 * @exception DWTException <ul> |
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209 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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210 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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211 * </ul> |
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212 * |
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213 * @see Layout |
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214 * @see #getBounds |
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215 * @see #getSize |
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216 * @see Control#getBorderWidth |
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217 * @see Scrollable#computeTrim |
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218 * @see Scrollable#getClientArea |
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219 */ |
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220 public Point computeSize (int wHint, int hHint) { |
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221 checkWidget(); |
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222 int width = wHint, height = hHint; |
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223 if (wHint is DWT.DEFAULT) width = 32; |
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224 if (hHint is DWT.DEFAULT) height = 32; |
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225 if ((parent.style & DWT.VERTICAL) !is 0) { |
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226 height += MINIMUM_WIDTH; |
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227 } else { |
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228 width += MINIMUM_WIDTH; |
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229 } |
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230 return new Point (width, height); |
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231 } |
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232 public void dispose () { |
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233 if (isDisposed()) return; |
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234 |
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235 /* |
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236 * Must call parent.destroyItem() before super.dispose(), since it needs to |
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237 * query the bounds to properly remove the item. |
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238 */ |
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239 parent.destroyItem(this); |
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240 super.dispose (); |
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241 parent = null; |
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242 control = null; |
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243 |
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244 /* |
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245 * Although the parent for the chevron is the CoolBar (CoolItem can not be the parent) |
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246 * it has to be disposed with the item |
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247 */ |
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248 if (chevron !is null && !chevron.isDisposed()) chevron.dispose(); |
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249 chevron = null; |
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250 if (arrowImage !is null && !arrowImage.isDisposed()) arrowImage.dispose(); |
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251 arrowImage = null; |
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252 } |
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253 |
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254 Image createArrowImage (int width, int height) { |
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255 Point point = parent.fixPoint(width, height); |
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256 width = point.x; |
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257 height = point.y; |
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258 Color foreground = parent.getForeground (); |
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259 Color black = display.getSystemColor (DWT.COLOR_BLACK); |
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260 Color background = parent.getBackground (); |
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261 |
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262 PaletteData palette = new PaletteData (new RGB[]{foreground.getRGB(), background.getRGB(), black.getRGB()}); |
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263 ImageData imageData = new ImageData (width, height, 4, palette); |
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264 imageData.transparentPixel = 1; |
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265 Image image = new Image (display, imageData); |
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266 |
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267 GC gc = new GC (image, parent.getStyle() & DWT.RIGHT_TO_LEFT); |
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268 gc.setBackground (background); |
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269 gc.fillRectangle (0, 0, width, height); |
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270 gc.setForeground (black); |
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271 |
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272 int startX = 0 ; |
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273 if ((parent.style & DWT.VERTICAL) !is 0) { |
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274 startX = width - CHEVRON_IMAGE_WIDTH; |
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275 } |
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276 int startY = height / 6; |
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277 int step = 2; |
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278 gc.drawLine (startX, startY, startX + step, startY + step); |
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279 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); |
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280 startX++; |
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281 gc.drawLine (startX, startY, startX + step, startY + step); |
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282 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); |
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283 startX += 3; |
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284 gc.drawLine (startX, startY, startX + step, startY + step); |
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285 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); |
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286 startX++; |
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287 gc.drawLine (startX, startY, startX + step, startY + step); |
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288 gc.drawLine (startX, startY + (2 * step), startX + step, startY + step); |
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289 gc.dispose (); |
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290 return image; |
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291 } |
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292 /** |
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293 * Returns a rectangle describing the receiver's size and location |
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294 * relative to its parent. |
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295 * |
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296 * @return the receiver's bounding rectangle |
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297 * |
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298 * @exception DWTException <ul> |
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299 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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300 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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301 * </ul> |
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302 */ |
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303 public Rectangle getBounds () { |
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304 checkWidget(); |
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305 return parent.fixRectangle(itemBounds.x, itemBounds.y, itemBounds.width, itemBounds.height); |
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306 } |
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307 Rectangle internalGetBounds () { |
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308 return new Rectangle(itemBounds.x, itemBounds.y, itemBounds.width, itemBounds.height); |
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309 } |
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310 /** |
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311 * Returns the control that is associated with the receiver. |
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312 * |
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313 * @return the control that is contained by the receiver |
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314 * |
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315 * @exception DWTException <ul> |
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316 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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317 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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318 * </ul> |
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319 */ |
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320 public Control getControl () { |
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321 checkWidget(); |
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322 return control; |
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323 } |
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324 /** |
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325 * Returns the minimum size that the cool item can |
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326 * be resized to using the cool item's gripper. |
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327 * |
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328 * @return a point containing the minimum width and height of the cool item, in pixels |
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329 * |
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330 * @exception DWTException <ul> |
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331 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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332 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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333 * </ul> |
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334 * |
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335 * @since 2.0 |
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336 */ |
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337 public Point getMinimumSize () { |
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338 checkWidget(); |
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339 return parent.fixPoint(minimumWidth, minimumHeight); |
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340 } |
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341 /** |
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342 * Returns the receiver's parent, which must be a <code>CoolBar</code>. |
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343 * |
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344 * @return the receiver's parent |
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345 * |
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346 * @exception DWTException <ul> |
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347 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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348 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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349 * </ul> |
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350 */ |
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351 public CoolBar getParent () { |
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352 checkWidget(); |
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353 return parent; |
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354 } |
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355 /** |
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356 * Returns a point describing the receiver's ideal size. |
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357 * The x coordinate of the result is the ideal width of the receiver. |
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358 * The y coordinate of the result is the ideal height of the receiver. |
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359 * |
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360 * @return the receiver's ideal size |
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361 * |
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362 * @exception DWTException <ul> |
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363 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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364 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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365 * </ul> |
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366 */ |
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367 public Point getPreferredSize () { |
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368 checkWidget(); |
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369 return parent.fixPoint(preferredWidth, preferredHeight); |
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370 } |
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371 /** |
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372 * Returns a point describing the receiver's size. The |
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373 * x coordinate of the result is the width of the receiver. |
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374 * The y coordinate of the result is the height of the |
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375 * receiver. |
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376 * |
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377 * @return the receiver's size |
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378 * |
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379 * @exception DWTException <ul> |
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380 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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381 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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382 * </ul> |
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383 */ |
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384 public Point getSize () { |
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385 checkWidget(); |
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386 return parent.fixPoint(itemBounds.width, itemBounds.height); |
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387 } |
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388 int internalGetMinimumWidth () { |
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389 int width = minimumWidth + MINIMUM_WIDTH; |
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390 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { |
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391 width += CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; |
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392 } |
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393 return width; |
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394 } |
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395 /* |
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396 * Called when the chevron is selected. |
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397 */ |
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398 void onSelection (Event ev) { |
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399 Rectangle bounds = chevron.getBounds(); |
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400 Event event = new Event(); |
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401 event.detail = DWT.ARROW; |
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402 if ((parent.style & DWT.VERTICAL) !is 0) { |
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403 event.x = bounds.x + bounds.width; |
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404 event.y = bounds.y; |
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405 } else { |
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406 event.x = bounds.x; |
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407 event.y = bounds.y + bounds.height; |
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408 } |
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409 postEvent (DWT.Selection, event); |
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410 } |
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411 /** |
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412 * Removes the listener from the collection of listeners that |
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413 * will be notified when the control is selected by the user. |
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414 * |
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415 * @param listener the listener which should no longer be notified |
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416 * |
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417 * @exception IllegalArgumentException <ul> |
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418 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
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419 * </ul> |
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420 * @exception DWTException <ul> |
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421 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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422 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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423 * </ul> |
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424 * |
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425 * @see SelectionListener |
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426 * @see #addSelectionListener |
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427 * |
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428 * @since 2.0 |
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429 */ |
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430 public void removeSelectionListener(SelectionListener listener) { |
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431 checkWidget(); |
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432 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); |
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433 if (eventTable is null) return; |
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434 eventTable.unhook (DWT.Selection, listener); |
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435 eventTable.unhook (DWT.DefaultSelection,listener); |
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436 } |
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437 void setBounds (int x, int y, int width, int height) { |
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438 itemBounds.x = x; |
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439 itemBounds.y = y; |
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440 itemBounds.width = width; |
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441 itemBounds.height = height; |
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442 if (control !is null) { |
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443 int controlWidth = width - MINIMUM_WIDTH; |
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444 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { |
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445 controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; |
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446 } |
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447 control.setBounds (parent.fixRectangle(x + MINIMUM_WIDTH, y, controlWidth, height)); |
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448 } |
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449 updateChevron(); |
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450 } |
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451 /** |
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452 * Sets the control that is associated with the receiver |
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453 * to the argument. |
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454 * |
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455 * @param control the new control that will be contained by the receiver |
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456 * |
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457 * @exception IllegalArgumentException <ul> |
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458 * <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> |
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459 * <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li> |
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460 * </ul> |
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461 * @exception DWTException <ul> |
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462 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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463 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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464 * </ul> |
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465 */ |
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466 public void setControl (Control control) { |
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467 checkWidget(); |
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468 if (control !is null) { |
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469 if (control.isDisposed()) error (DWT.ERROR_INVALID_ARGUMENT); |
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470 if (control.parent !is parent) error (DWT.ERROR_INVALID_PARENT); |
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471 } |
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472 this.control = control; |
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473 if (control !is null) { |
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474 int controlWidth = itemBounds.width - MINIMUM_WIDTH; |
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475 if ((style & DWT.DROP_DOWN) !is 0 && itemBounds.width < preferredWidth) { |
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476 controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; |
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477 } |
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478 control.setBounds (parent.fixRectangle(itemBounds.x + MINIMUM_WIDTH, itemBounds.y, controlWidth, itemBounds.height)); |
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479 } |
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480 } |
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481 /** |
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482 * Sets the minimum size that the cool item can be resized to |
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483 * using the cool item's gripper, to the point specified by the arguments. |
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484 * |
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485 * @param width the minimum width of the cool item, in pixels |
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486 * @param height the minimum height of the cool item, in pixels |
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487 * |
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488 * @exception DWTException <ul> |
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489 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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490 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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491 * </ul> |
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492 * |
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493 * @since 2.0 |
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494 */ |
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495 public void setMinimumSize (int width, int height) { |
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496 checkWidget (); |
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497 Point point = parent.fixPoint(width, height); |
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498 minimumWidth = point.x; |
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499 minimumHeight = point.y; |
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500 } |
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501 /** |
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502 * Sets the minimum size that the cool item can be resized to |
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503 * using the cool item's gripper, to the point specified by the argument. |
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504 * |
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505 * @param size a point representing the minimum width and height of the cool item, in pixels |
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506 * |
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507 * @exception IllegalArgumentException <ul> |
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508 * <li>ERROR_NULL_ARGUMENT - if the point is null</li> |
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509 * </ul> |
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510 * @exception DWTException <ul> |
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511 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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512 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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513 * </ul> |
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514 * |
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515 * @since 2.0 |
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516 */ |
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517 public void setMinimumSize (Point size) { |
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518 checkWidget (); |
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519 if (size is null) error(DWT.ERROR_NULL_ARGUMENT); |
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520 setMinimumSize(size.x, size.y); |
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521 } |
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522 /** |
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523 * Sets the receiver's ideal size to the point specified by the arguments. |
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524 * |
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525 * @param width the new ideal width for the receiver |
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526 * @param height the new ideal height for the receiver |
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527 * |
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528 * @exception DWTException <ul> |
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529 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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530 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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531 * </ul> |
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532 */ |
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533 public void setPreferredSize (int width, int height) { |
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534 checkWidget(); |
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535 ideal = true; |
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536 Point point = parent.fixPoint(width, height); |
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537 preferredWidth = Math.max (point.x, MINIMUM_WIDTH); |
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538 preferredHeight = point.y; |
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539 } |
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540 /** |
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541 * Sets the receiver's ideal size to the point specified by the argument. |
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542 * |
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543 * @param size the new ideal size for the receiver |
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544 * |
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545 * @exception IllegalArgumentException <ul> |
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546 * <li>ERROR_NULL_ARGUMENT - if the point is null</li> |
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547 * </ul> |
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548 * @exception DWTException <ul> |
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549 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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550 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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551 * </ul> |
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552 */ |
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553 public void setPreferredSize (Point size) { |
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554 checkWidget(); |
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555 if (size is null) error(DWT.ERROR_NULL_ARGUMENT); |
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556 setPreferredSize(size.x, size.y); |
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557 } |
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558 /** |
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559 * Sets the receiver's size to the point specified by the arguments. |
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560 * <p> |
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561 * Note: Attempting to set the width or height of the |
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562 * receiver to a negative number will cause that |
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563 * value to be set to zero instead. |
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564 * </p> |
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565 * |
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|
566 * @param width the new width for the receiver |
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|
567 * @param height the new height for the receiver |
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568 * |
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|
569 * @exception DWTException <ul> |
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570 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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571 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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572 * </ul> |
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573 */ |
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574 public void setSize (int width, int height) { |
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575 checkWidget(); |
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576 Point point = parent.fixPoint(width, height); |
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577 width = Math.max(point.x, minimumWidth + MINIMUM_WIDTH); |
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578 height = point.y; |
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579 if (!ideal) { |
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580 preferredWidth = width; |
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581 preferredHeight = height; |
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582 } |
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583 itemBounds.width = requestedWidth = width; |
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584 itemBounds.height = height; |
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585 if (control !is null) { |
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586 int controlWidth = width - MINIMUM_WIDTH; |
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587 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { |
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588 controlWidth -= CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM + CHEVRON_LEFT_MARGIN; |
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589 } |
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590 control.setSize(parent.fixPoint(controlWidth, height)); |
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591 } |
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592 parent.relayout(); |
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593 updateChevron(); |
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594 } |
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595 /** |
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596 * Sets the receiver's size to the point specified by the argument. |
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597 * <p> |
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598 * Note: Attempting to set the width or height of the |
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599 * receiver to a negative number will cause them to be |
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600 * set to zero instead. |
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601 * </p> |
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602 * |
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603 * @param size the new size for the receiver |
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604 * |
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605 * @exception IllegalArgumentException <ul> |
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606 * <li>ERROR_NULL_ARGUMENT - if the point is null</li> |
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607 * </ul> |
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608 * @exception DWTException <ul> |
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609 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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610 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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611 * </ul> |
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612 */ |
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613 public void setSize (Point size) { |
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614 checkWidget(); |
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615 if (size is null) error (DWT.ERROR_NULL_ARGUMENT); |
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616 setSize (size.x, size.y); |
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617 } |
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618 void updateChevron() { |
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619 if (control !is null) { |
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620 int width = itemBounds.width; |
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621 if ((style & DWT.DROP_DOWN) !is 0 && width < preferredWidth) { |
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622 if (chevron is null) { |
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623 chevron = new ToolBar (parent, DWT.FLAT | DWT.NO_FOCUS); |
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624 ToolItem toolItem = new ToolItem (chevron, DWT.PUSH); |
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625 toolItem.addListener (DWT.Selection, new Listener() { |
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626 public void handleEvent (Event event) { |
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627 CoolItem.this.onSelection (event); |
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628 } |
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629 }); |
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630 } |
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631 int controlHeight, currentImageHeight = 0; |
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632 if ((parent.style & DWT.VERTICAL) !is 0) { |
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633 controlHeight = control.getSize ().x; |
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634 if (arrowImage !is null) currentImageHeight = arrowImage.getBounds().width; |
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635 } else { |
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636 controlHeight = control.getSize ().y; |
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637 if (arrowImage !is null) currentImageHeight = arrowImage.getBounds().height; |
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638 } |
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639 int height = Math.min (controlHeight, itemBounds.height); |
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640 int imageHeight = Math.max(1, height - CHEVRON_VERTICAL_TRIM); |
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641 if (currentImageHeight !is imageHeight) { |
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642 Image image = createArrowImage (CHEVRON_IMAGE_WIDTH, imageHeight); |
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643 chevron.getItem (0).setImage (image); |
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644 if (arrowImage !is null) arrowImage.dispose (); |
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645 arrowImage = image; |
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646 } |
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647 chevron.setBackground (parent.getBackground()); |
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648 chevron.setBounds (parent.fixRectangle ( |
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649 itemBounds.x + width - CHEVRON_LEFT_MARGIN - CHEVRON_IMAGE_WIDTH - CHEVRON_HORIZONTAL_TRIM, |
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650 itemBounds.y, |
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651 CHEVRON_IMAGE_WIDTH + CHEVRON_HORIZONTAL_TRIM, |
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652 height)); |
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653 chevron.setVisible(true); |
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654 } else { |
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|
655 if (chevron !is null) { |
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656 chevron.setVisible(false); |
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|
657 } |
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|
658 } |
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|
659 } |
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|
660 } |
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661 } |