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annotate dwt/widgets/Scale.d @ 46:cfa563df4fdd

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Updated Widget and Display to 3.514
author Jacob Carlborg <doob@me.com>
date Fri, 05 Dec 2008 16:00:41 +0100
parents d8635bb48c7c
children 1926e6c4bf87
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 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.Scale;
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12
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13 import dwt.dwthelper.utils;
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16 import dwt.DWT;
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17 import dwt.DWTException;
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18 import dwt.events.SelectionListener;
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19 import dwt.graphics.Point;
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20 import dwt.internal.cocoa.NSControl;
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21 import dwt.internal.cocoa.NSRect;
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22 import dwt.internal.cocoa.NSSize;
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23 import dwt.internal.cocoa.NSSlider;
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24 import dwt.internal.cocoa.SWTSlider;
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25
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26 /**
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27 * Instances of the receiver represent a selectable user
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28 * interface object that present a range of continuous
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29 * numeric values.
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30 * <dl>
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31 * <dt><b>Styles:</b></dt>
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32 * <dd>HORIZONTAL, VERTICAL</dd>
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33 * <dt><b>Events:</b></dt>
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34 * <dd>Selection</dd>
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35 * </dl>
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36 * <p>
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37 * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
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38 * </p><p>
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39 * <p>
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40 * IMPORTANT: This class is intended to be subclassed <em>only</em>
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41 * within the DWT implementation.
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42 * </p>
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43 *
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44 * @see <a href="http://www.eclipse.org/swt/snippets/#scale">Scale snippets</a>
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45 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a>
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46 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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47 */
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48 public class Scale : Control {
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49 int increment = 1;
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50 int pageIncrement = 10;
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51
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52 /**
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53 * Constructs a new instance of this class given its parent
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54 * and a style value describing its behavior and appearance.
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55 * <p>
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56 * The style value is either one of the style constants defined in
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57 * class <code>DWT</code> which is applicable to instances of this
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58 * class, or must be built by <em>bitwise OR</em>'ing together
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59 * (that is, using the <code>int</code> "|" operator) two or more
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60 * of those <code>DWT</code> style constants. The class description
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61 * lists the style constants that are applicable to the class.
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62 * Style bits are also inherited from superclasses.
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63 * </p>
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64 *
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65 * @param parent a composite control which will be the parent of the new instance (cannot be null)
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66 * @param style the style of control to construct
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67 *
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68 * @exception IllegalArgumentException <ul>
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69 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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70 * </ul>
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71 * @exception DWTException <ul>
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72 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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73 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
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74 * </ul>
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75 *
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76 * @see DWT#HORIZONTAL
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77 * @see DWT#VERTICAL
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78 * @see Widget#checkSubclass
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79 * @see Widget#getStyle
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80 */
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81 public this (Composite parent, int style) {
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82 super (parent, checkStyle (style));
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83 }
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84
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85 /**
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86 * Adds the listener to the collection of listeners who will
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87 * be notified when the user changes the receiver's value, by sending
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88 * it one of the messages defined in the <code>SelectionListener</code>
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89 * interface.
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90 * <p>
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91 * <code>widgetSelected</code> is called when the user changes the receiver's value.
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92 * <code>widgetDefaultSelected</code> is not called.
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93 * </p>
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94 *
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95 * @param listener the listener which should be notified
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96 *
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97 * @exception IllegalArgumentException <ul>
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98 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
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99 * </ul>
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100 * @exception DWTException <ul>
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101 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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102 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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103 * </ul>
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104 *
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105 * @see SelectionListener
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106 * @see #removeSelectionListener
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107 */
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108 public void addSelectionListener(SelectionListener listener) {
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109 checkWidget();
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110 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
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111 TypedListener typedListener = new TypedListener(listener);
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112 addListener(DWT.Selection,typedListener);
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113 addListener(DWT.DefaultSelection,typedListener);
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114 }
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115
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116 static int checkStyle (int style) {
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117 return checkBits (style, DWT.HORIZONTAL, DWT.VERTICAL, 0, 0, 0, 0);
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118 }
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119
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120 public Point computeSize (int wHint, int hHint, bool changed) {
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121 checkWidget();
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122 NSSlider widget = cast(NSSlider)view;
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123 NSSize size = widget.cell().cellSizeForBounds(widget.bounds());
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124 int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT;
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125 if ((style & DWT.HORIZONTAL) !is 0) {
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126 height = cast(int)Math.ceil(size.height);
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127 width = height * 10;
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128 } else {
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129 width = cast(int)Math.ceil(size.width);
0
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130 height = width * 10;
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131 }
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132 if (wHint !is DWT.DEFAULT) width = wHint;
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133 if (hHint !is DWT.DEFAULT) height = hHint;
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134 return new Point (width, height);
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135 }
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136
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137 void createHandle () {
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138 NSSlider widget = cast(NSSlider)new SWTSlider().alloc();
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139 NSRect rect = NSRect();
0
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140 rect.width = 1;
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141 rect.height = 1;
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142 widget.initWithFrame(rect);
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143 widget.setMaxValue(100);
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144 view = widget;
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145 }
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146
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147 void deregister() {
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148 super.deregister();
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149 display.removeWidget(((NSControl)view).cell());
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150 }
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151
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152
0
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153 /**
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154 * Returns the amount that the receiver's value will be
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155 * modified by when the up/down (or right/left) arrows
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156 * are pressed.
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157 *
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158 * @return the increment
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159 *
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160 * @exception DWTException <ul>
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161 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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162 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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163 * </ul>
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164 */
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165 public int getIncrement () {
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166 checkWidget();
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167 return increment;
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168 }
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169
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170 /**
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171 * Returns the maximum value which the receiver will allow.
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172 *
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173 * @return the maximum
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174 *
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175 * @exception DWTException <ul>
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176 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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177 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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178 * </ul>
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179 */
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180 public int getMaximum () {
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181 checkWidget();
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182 return cast(int)(cast(NSSlider)view).maxValue();
0
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183 }
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184
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185 /**
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186 * Returns the minimum value which the receiver will allow.
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187 *
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188 * @return the minimum
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189 *
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190 * @exception DWTException <ul>
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191 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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192 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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193 * </ul>
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194 */
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195 public int getMinimum () {
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196 checkWidget();
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197 return cast(int)(cast(NSSlider)view).minValue();
0
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198 }
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199
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200 /**
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201 * Returns the amount that the receiver's value will be
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202 * modified by when the page increment/decrement areas
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203 * are selected.
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204 *
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205 * @return the page increment
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206 *
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207 * @exception DWTException <ul>
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208 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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209 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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210 * </ul>
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211 */
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212 public int getPageIncrement () {
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213 checkWidget();
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214 return pageIncrement;
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215 }
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216
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217 /**
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218 * Returns the 'selection', which is the receiver's position.
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219 *
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220 * @return the selection
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221 *
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222 * @exception DWTException <ul>
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223 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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224 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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225 * </ul>
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226 */
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227 public int getSelection () {
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228 checkWidget();
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229 // int value = OS.GetControl32BitValue (handle);
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230 // if ((style & DWT.VERTICAL) !is 0) {
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231 // int minimum = OS.GetControl32BitMinimum (handle);
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232 // int maximum = OS.GetControl32BitMaximum (handle);
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233 // value = maximum - value + minimum;
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234 // }
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235 return cast(int)(cast(NSSlider)view).doubleValue();
0
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236 }
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237
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238 void register() {
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239 super.register();
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240 display.addWidget(((NSControl)view).cell(), this);
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241 }
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242
0
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243 /**
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244 * Removes the listener from the collection of listeners who will
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245 * be notified when the user changes the receiver's value.
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246 *
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247 * @param listener the listener which should no longer be notified
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248 *
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249 * @exception IllegalArgumentException <ul>
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250 * <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
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251 * </ul>
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252 * @exception DWTException <ul>
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253 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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254 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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255 * </ul>
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256 *
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257 * @see SelectionListener
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258 * @see #addSelectionListener
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259 */
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260 public void removeSelectionListener(SelectionListener listener) {
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261 checkWidget();
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262 if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
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263 if (eventTable is null) return;
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264 eventTable.unhook(DWT.Selection, listener);
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265 eventTable.unhook(DWT.DefaultSelection,listener);
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266 }
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267
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268 /**
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269 * Sets the amount that the receiver's value will be
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270 * modified by when the up/down (or right/left) arrows
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271 * are pressed to the argument, which must be at least
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272 * one.
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273 *
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274 * @param increment the new increment (must be greater than zero)
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275 *
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276 * @exception DWTException <ul>
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277 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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278 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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279 * </ul>
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280 */
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281 public void setIncrement (int value) {
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282 checkWidget();
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283 if (value < 1) return;
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284 increment = value;
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285 }
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286
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287 /**
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288 * Sets the maximum value that the receiver will allow. This new
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289 * value will be ignored if it is not greater than the receiver's current
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290 * minimum value. If the new maximum is applied then the receiver's
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291 * selection value will be adjusted if necessary to fall within its new range.
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292 *
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293 * @param value the new maximum, which must be greater than the current minimum
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294 *
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295 * @exception DWTException <ul>
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296 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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297 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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298 * </ul>
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299 */
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300 public void setMaximum (int value) {
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301 checkWidget();
45
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302 int minimum = (int)((NSSlider)view).minValue();
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303 if (value <= minimum) return;
0
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304 }
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305
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306 /**
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307 * Sets the minimum value that the receiver will allow. This new
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308 * value will be ignored if it is negative or is not less than the receiver's
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309 * current maximum value. If the new minimum is applied then the receiver's
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310 * selection value will be adjusted if necessary to fall within its new range.
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311 *
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312 * @param value the new minimum, which must be nonnegative and less than the current maximum
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313 *
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314 * @exception DWTException <ul>
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315 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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316 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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317 * </ul>
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318 */
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319 public void setMinimum (int value) {
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320 checkWidget();
45
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321 int maximum = (int)((NSSlider)view).maxValue();
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322 if (!(0 <= value && value < maximum)) return;
0
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323 }
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324
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325 /**
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326 * Sets the amount that the receiver's value will be
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parents:
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327 * modified by when the page increment/decrement areas
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328 * are selected to the argument, which must be at least
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parents:
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329 * one.
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parents:
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330 *
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331 * @param pageIncrement the page increment (must be greater than zero)
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332 *
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333 * @exception DWTException <ul>
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334 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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parents:
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335 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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336 * </ul>
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337 */
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338 public void setPageIncrement (int value) {
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339 checkWidget();
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340 if (value < 1) return;
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341 pageIncrement = value;
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342 }
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343
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344 /**
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345 * Sets the 'selection', which is the receiver's value,
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parents:
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346 * to the argument which must be greater than or equal to zero.
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parents:
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347 *
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348 * @param value the new selection (must be zero or greater)
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parents:
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349 *
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parents:
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350 * @exception DWTException <ul>
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parents:
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351 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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parents:
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352 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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parents:
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353 * </ul>
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parents:
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354 */
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355 public void setSelection (int value) {
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parents:
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356 checkWidget();
7
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Frank Benoit <benoit@tionex.de>
parents: 5
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357 (cast(NSSlider)view).setDoubleValue(value);
0
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358 }
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parents:
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359
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360 }