annotate dwt/graphics/Cursor.d @ 35:7d135fe0caf2

Ported dwt.graphics.Cursor and dwt.widgets.MenuItem
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sun, 14 Sep 2008 23:32:29 +0200
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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 * Port to the D programming language:
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12 * Jacob Carlborg <jacob.carlborg@gmail.com>
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13 *******************************************************************************/
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14 module dwt.graphics.Cursor;
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16
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17 import dwt.DWT;
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18 import dwt.DWTError;
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19 import dwt.internal.cocoa.NSBitmapImageRep;
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20 import dwt.internal.cocoa.NSCursor;
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21 import dwt.internal.cocoa.NSImage;
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22 import dwt.internal.cocoa.NSPoint;
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23 import dwt.internal.cocoa.NSSize;
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24 import dwt.internal.cocoa.NSString;
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25 import dwt.internal.cocoa.OS;
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27 import tango.text.convert.Format;
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29 import dwt.dwthelper.utils;
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30 import dwt.graphics.Device;
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31 import dwt.graphics.ImageData;
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32 import dwt.graphics.PaletteData;
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33 import dwt.graphics.Resource;
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34 import dwt.graphics.RGB;
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35 import dwt.internal.cocoa.NSInteger;
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36
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37 /**
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38 * Instances of this class manage operating system resources that
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39 * specify the appearance of the on-screen pointer. To create a
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40 * cursor you specify the device and either a simple cursor style
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41 * describing one of the standard operating system provided cursors
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42 * or the image and mask data for the desired appearance.
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43 * <p>
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44 * Application code must explicitly invoke the <code>Cursor.dispose()</code>
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45 * method to release the operating system resources managed by each instance
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46 * when those instances are no longer required.
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47 * </p>
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48 * <dl>
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49 * <dt><b>Styles:</b></dt>
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50 * <dd>
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51 * CURSOR_ARROW, CURSOR_WAIT, CURSOR_CROSS, CURSOR_APPSTARTING, CURSOR_HELP,
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52 * CURSOR_SIZEALL, CURSOR_SIZENESW, CURSOR_SIZENS, CURSOR_SIZENWSE, CURSOR_SIZEWE,
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53 * CURSOR_SIZEN, CURSOR_SIZES, CURSOR_SIZEE, CURSOR_SIZEW, CURSOR_SIZENE, CURSOR_SIZESE,
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54 * CURSOR_SIZESW, CURSOR_SIZENW, CURSOR_UPARROW, CURSOR_IBEAM, CURSOR_NO, CURSOR_HAND
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55 * </dd>
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56 * </dl>
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57 * <p>
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58 * Note: Only one of the above styles may be specified.
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59 * </p>
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60 */
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61
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62 public final class Cursor : Resource {
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63
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64 /**
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65 * the handle to the OS cursor resource
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66 * (Warning: This field is platform dependent)
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67 * <p>
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68 * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT
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69 * public API. It is marked public only so that it can be shared
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70 * within the packages provided by DWT. It is not available on all
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71 * platforms and should never be accessed from application code.
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72 * </p>
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73 */
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74 public NSCursor handle;
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75
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76 /**
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77 * Prevents uninitialized instances from being created outside the package.
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78 */
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79 this(Device device) {
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80 super(device);
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81 }
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82
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83 /**
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84 * Constructs a new cursor given a device and a style
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85 * constant describing the desired cursor appearance.
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86 * <p>
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87 * You must dispose the cursor when it is no longer required.
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88 * </p>
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89 *
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90 * @param device the device on which to allocate the cursor
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91 * @param style the style of cursor to allocate
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92 *
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93 * @exception IllegalArgumentException <ul>
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94 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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95 * <li>ERROR_INVALID_ARGUMENT - when an unknown style is specified</li>
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96 * </ul>
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97 * @exception DWTError <ul>
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98 * <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
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99 * </ul>
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100 *
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101 * @see DWT#CURSOR_ARROW
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102 * @see DWT#CURSOR_WAIT
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103 * @see DWT#CURSOR_CROSS
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104 * @see DWT#CURSOR_APPSTARTING
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105 * @see DWT#CURSOR_HELP
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106 * @see DWT#CURSOR_SIZEALL
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107 * @see DWT#CURSOR_SIZENESW
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108 * @see DWT#CURSOR_SIZENS
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109 * @see DWT#CURSOR_SIZENWSE
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110 * @see DWT#CURSOR_SIZEWE
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111 * @see DWT#CURSOR_SIZEN
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112 * @see DWT#CURSOR_SIZES
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113 * @see DWT#CURSOR_SIZEE
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114 * @see DWT#CURSOR_SIZEW
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115 * @see DWT#CURSOR_SIZENE
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116 * @see DWT#CURSOR_SIZESE
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117 * @see DWT#CURSOR_SIZESW
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118 * @see DWT#CURSOR_SIZENW
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119 * @see DWT#CURSOR_UPARROW
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120 * @see DWT#CURSOR_IBEAM
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121 * @see DWT#CURSOR_NO
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122 * @see DWT#CURSOR_HAND
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123 */
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124 public this(Device device, int style) {
0
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125 super(device);
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126 switch (style) {
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127 case DWT.CURSOR_HAND: handle = NSCursor.pointingHandCursor(); break;
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128 case DWT.CURSOR_ARROW: handle = NSCursor.arrowCursor(); break;
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129 case DWT.CURSOR_WAIT: handle = NSCursor.crosshairCursor(); break;
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130 case DWT.CURSOR_CROSS: handle = NSCursor.crosshairCursor(); break;
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131 case DWT.CURSOR_APPSTARTING: handle = NSCursor.arrowCursor(); break;
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132 case DWT.CURSOR_HELP: handle = NSCursor.crosshairCursor(); break;
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133 case DWT.CURSOR_SIZEALL: handle = NSCursor.crosshairCursor(); break;
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134 case DWT.CURSOR_SIZENESW: handle = NSCursor.crosshairCursor(); break;
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135 case DWT.CURSOR_SIZENS: handle = NSCursor.resizeUpDownCursor(); break;
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136 case DWT.CURSOR_SIZENWSE: handle = NSCursor.crosshairCursor(); break;
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137 case DWT.CURSOR_SIZEWE: handle = NSCursor.resizeLeftRightCursor(); break;
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138 case DWT.CURSOR_SIZEN: handle = NSCursor.resizeUpCursor(); break;
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139 case DWT.CURSOR_SIZES: handle = NSCursor.resizeDownCursor(); break;
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140 case DWT.CURSOR_SIZEE: handle = NSCursor.resizeRightCursor(); break;
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141 case DWT.CURSOR_SIZEW: handle = NSCursor.resizeLeftCursor(); break;
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142 case DWT.CURSOR_SIZENE: handle = NSCursor.crosshairCursor(); break;
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143 case DWT.CURSOR_SIZESE: handle = NSCursor.crosshairCursor(); break;
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144 case DWT.CURSOR_SIZESW: handle = NSCursor.crosshairCursor(); break;
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145 case DWT.CURSOR_SIZENW: handle = NSCursor.crosshairCursor(); break;
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146 case DWT.CURSOR_UPARROW: handle = NSCursor.crosshairCursor(); break;
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147 case DWT.CURSOR_IBEAM: handle = NSCursor.IBeamCursor(); break;
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148 case DWT.CURSOR_NO: handle = NSCursor.crosshairCursor(); break;
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149 default:
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150 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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151 }
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152 handle.retain();
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153 handle.setOnMouseEntered(true);
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154 init();
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155 }
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156
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157 /**
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158 * Constructs a new cursor given a device, image and mask
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159 * data describing the desired cursor appearance, and the x
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160 * and y coordinates of the <em>hotspot</em> (that is, the point
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161 * within the area covered by the cursor which is considered
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162 * to be where the on-screen pointer is "pointing").
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163 * <p>
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164 * The mask data is allowed to be null, but in this case the source
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165 * must be an ImageData representing an icon that specifies both
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166 * color data and mask data.
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167 * <p>
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168 * You must dispose the cursor when it is no longer required.
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169 * </p>
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170 *
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171 * @param device the device on which to allocate the cursor
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172 * @param source the color data for the cursor
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173 * @param mask the mask data for the cursor (or null)
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174 * @param hotspotX the x coordinate of the cursor's hotspot
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175 * @param hotspotY the y coordinate of the cursor's hotspot
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176 *
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177 * @exception IllegalArgumentException <ul>
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178 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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179 * <li>ERROR_NULL_ARGUMENT - if the source is null</li>
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180 * <li>ERROR_NULL_ARGUMENT - if the mask is null and the source does not have a mask</li>
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181 * <li>ERROR_INVALID_ARGUMENT - if the source and the mask are not the same
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182 * size, or if the hotspot is outside the bounds of the image</li>
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183 * </ul>
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184 * @exception DWTError <ul>
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185 * <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
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186 * </ul>
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187 */
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188 public this(Device device, ImageData source, ImageData mask, int hotspotX, int hotspotY) {
0
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189 super(device);
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190 if (source is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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191 if (mask is null) {
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192 if (source.getTransparencyType() !is DWT.TRANSPARENCY_MASK) {
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193 DWT.error(DWT.ERROR_NULL_ARGUMENT);
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194 }
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195 mask = source.getTransparencyMask();
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196 }
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197 /* Check the bounds. Mask must be the same size as source */
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198 if (mask.width !is source.width || mask.height !is source.height) {
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199 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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200 }
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201 /* Check the hotspots */
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202 if (hotspotX >= source.width || hotspotX < 0 ||
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203 hotspotY >= source.height || hotspotY < 0) {
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204 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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205 }
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206 byte[] data = new byte[source.width * source.height * 4];
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207 for (int y = 0; y < source.height; y++) {
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208 int offset = y * source.width * 4;
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209 for (int x = 0; x < source.width; x++) {
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210 int pixel = source.getPixel(x, y);
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211 int maskPixel = mask.getPixel(x, y);
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212 if (pixel is 0 && maskPixel is 0) {
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213 // BLACK
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214 data[offset] = cast(byte)0xFF;
0
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215 } else if (pixel is 0 && maskPixel is 1) {
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216 // WHITE - cursor color
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217 data[offset] = data[offset + 1] = data[offset + 2] = data[offset + 3] = cast(byte)0xFF;
0
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218 } else if (pixel is 1 && maskPixel is 0) {
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219 // SCREEN
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220 } else {
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221 /*
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222 * Feature in the Macintosh. It is not possible to have
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223 * the reverse screen case using NSCursor.
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224 * Reverse screen will be the same as screen.
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225 */
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226 // REVERSE SCREEN -> SCREEN
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227 }
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228 offset += 4;
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229 }
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230 }
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231 createNSCursor(hotspotX, hotspotY, data, source.width, source.height);
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232 init();
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233 }
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234
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235 void createNSCursor(int hotspotX, int hotspotY, byte[] buffer, int width, int height) {
35
7d135fe0caf2 Ported dwt.graphics.Cursor and dwt.widgets.MenuItem
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236 NSImage nsImage = cast(NSImage)(new NSImage()).alloc();
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237 NSBitmapImageRep nsImageRep = cast(NSBitmapImageRep)(new NSBitmapImageRep()).alloc();
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238 handle = cast(NSCursor)(new NSCursor()).alloc();
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239 NSSize size = NSSize();
0
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240 size.width = width;
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241 size.height = height;
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242 nsImage = nsImage.initWithSize(size);
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7d135fe0caf2 Ported dwt.graphics.Cursor and dwt.widgets.MenuItem
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243 nsImageRep = nsImageRep.initWithBitmapDataPlanes_pixelsWide_pixelsHigh_bitsPerSample_samplesPerPixel_hasAlpha_isPlanar_colorSpaceName_bitmapFormat_bytesPerRow_bitsPerPixel_(0, cast(NSInteger) width, cast(NSInteger) height,
0
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244 8, 4, true, false, new NSString(OS.NSDeviceRGBColorSpace()),
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245 OS.NSAlphaFirstBitmapFormat | OS.NSAlphaNonpremultipliedBitmapFormat, cast(NSInteger) (width * 4, 32));
0
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246 OS.memmove(nsImageRep.bitmapData(), buffer, buffer.length);
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247 nsImage.addRepresentation(nsImageRep);
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248 NSPoint point = NSPoint();
0
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249 point.x = hotspotX;
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250 point.y = hotspotY;
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251 handle = handle.initWithImage_hotSpot_(nsImage, point);
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252 nsImageRep.release();
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253 nsImage.release();
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254 }
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255
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256 /**
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257 * Constructs a new cursor given a device, image data describing
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258 * the desired cursor appearance, and the x and y coordinates of
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259 * the <em>hotspot</em> (that is, the point within the area
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260 * covered by the cursor which is considered to be where the
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261 * on-screen pointer is "pointing").
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262 * <p>
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263 * You must dispose the cursor when it is no longer required.
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264 * </p>
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265 *
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266 * @param device the device on which to allocate the cursor
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267 * @param source the image data for the cursor
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268 * @param hotspotX the x coordinate of the cursor's hotspot
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269 * @param hotspotY the y coordinate of the cursor's hotspot
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270 *
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271 * @exception IllegalArgumentException <ul>
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272 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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273 * <li>ERROR_NULL_ARGUMENT - if the image is null</li>
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274 * <li>ERROR_INVALID_ARGUMENT - if the hotspot is outside the bounds of the
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275 * image</li>
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276 * </ul>
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277 * @exception DWTError <ul>
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278 * <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
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279 * </ul>
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280 *
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281 * @since 3.0
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282 */
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1a8b3cb347e0 Fix Ctors to 'this'
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283 public this(Device device, ImageData source, int hotspotX, int hotspotY) {
0
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284 super(device);
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285 if (source is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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286 if (hotspotX >= source.width || hotspotX < 0 ||
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287 hotspotY >= source.height || hotspotY < 0) {
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288 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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289 }
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290 byte[] data = new byte[source.width * source.height * 4];
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291 PaletteData palette = source.palette;
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292 if (palette.isDirect) {
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293 ImageData.blit(ImageData.BLIT_SRC,
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294 source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
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295 ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
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296 data, 32, source.width * 4, ImageData.MSB_FIRST, 0, 0, source.width, source.height, 0xFF0000, 0xFF00, 0xFF,
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297 false, false);
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298 } else {
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299 RGB[] rgbs = palette.getRGBs();
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300 int length = rgbs.length;
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301 byte[] srcReds = new byte[length];
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302 byte[] srcGreens = new byte[length];
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303 byte[] srcBlues = new byte[length];
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304 for (int i = 0; i < rgbs.length; i++) {
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305 RGB rgb = rgbs[i];
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306 if (rgb is null) continue;
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e831403a80a9 Add 'cast' to casts
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307 srcReds[i] = cast(byte)rgb.red;
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308 srcGreens[i] = cast(byte)rgb.green;
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309 srcBlues[i] = cast(byte)rgb.blue;
0
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310 }
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311 ImageData.blit(ImageData.BLIT_SRC,
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312 source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
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313 ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
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314 data, 32, source.width * 4, ImageData.MSB_FIRST, 0, 0, source.width, source.height, 0xFF0000, 0xFF00, 0xFF,
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315 false, false);
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316 }
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317 if (source.maskData !is null || source.transparentPixel !is -1) {
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318 ImageData mask = source.getTransparencyMask();
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319 byte[] maskData = mask.data;
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320 int maskBpl = mask.bytesPerLine;
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321 int offset = 0, maskOffset = 0;
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322 for (int y = 0; y<source.height; y++) {
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323 for (int x = 0; x<source.width; x++) {
7
e831403a80a9 Add 'cast' to casts
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324 data[offset] = ((maskData[maskOffset + (x >> 3)]) & (1 << (7 - (x & 0x7)))) !is 0 ? cast(byte)0xff : 0;
0
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325 offset += 4;
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326 }
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327 maskOffset += maskBpl;
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328 }
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329 } else if (source.alpha !is -1) {
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330 byte alpha = cast(byte)source.alpha;
0
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331 for (int i=0; i<data.length; i+=4) {
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332 data[i] = alpha;
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333 }
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334 } else if (source.alphaData !is null) {
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335 byte[] alphaData = source.alphaData;
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336 for (int i=0; i<data.length; i+=4) {
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337 data[i] = alphaData[i/4];
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338 }
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339 }
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340 createNSCursor(hotspotX, hotspotY, data, source.width, source.height);
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341 init();
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342 }
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343
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344 void destroy() {
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345 handle.release();
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346 handle = null;
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347 }
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348
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349 /**
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350 * Compares the argument to the receiver, and returns true
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351 * if they represent the <em>same</em> object using a class
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352 * specific comparison.
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353 *
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354 * @param object the object to compare with this object
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355 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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356 *
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357 * @see #hashCode
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358 */
35
7d135fe0caf2 Ported dwt.graphics.Cursor and dwt.widgets.MenuItem
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diff changeset
359 public int opEquals (Object object) {
0
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360 if (object is this) return true;
8
a9ab4c738ed8 Fix: instanceof
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361 if (!( null !is cast(Cursor)object )) return false;
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e831403a80a9 Add 'cast' to casts
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362 Cursor cursor = cast(Cursor) object;
0
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363 return device is cursor.device && handle is cursor.handle;
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364 }
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365
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366 alias opEequals equals;
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367
0
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368 /**
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369 * Returns an integer hash code for the receiver. Any two
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370 * objects that return <code>true</code> when passed to
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371 * <code>equals</code> must return the same value for this
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372 * method.
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373 *
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374 * @return the receiver's hash
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375 *
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376 * @see #equals
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377 */
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378 public hast_t toHash () {
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379 return handle !is null ? handle.id_ : 0;
0
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380 }
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381
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382 alias toHash hashCode;
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383
0
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384 /**
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385 * Returns <code>true</code> if the cursor has been disposed,
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386 * and <code>false</code> otherwise.
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387 * <p>
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388 * This method gets the dispose state for the cursor.
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389 * When a cursor has been disposed, it is an error to
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390 * invoke any other method using the cursor.
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391 *
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392 * @return <code>true</code> when the cursor is disposed and <code>false</code> otherwise
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393 */
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394 public bool isDisposed() {
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395 return handle is null;
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396 }
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397
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398 /**
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399 * Returns a string containing a concise, human-readable
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400 * description of the receiver.
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401 *
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402 * @return a string representation of the receiver
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403 */
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404 public String toString () {
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405 if (isDisposed()) return "Cursor {*DISPOSED*}";
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406 return Format("Cursor {{}{}" , handle , "}");
0
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407 }
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408
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409 /**
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410 * Invokes platform specific functionality to allocate a new cursor.
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411 * <p>
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412 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
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413 * API for <code>Cursor</code>. It is marked public only so that it
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414 * can be shared within the packages provided by DWT. It is not
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415 * available on all platforms, and should never be called from
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416 * application code.
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417 * </p>
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418 *
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419 * @param device the device on which to allocate the color
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420 * @param handle the handle for the cursor
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421 *
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422 * @private
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423 */
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424 public static Cursor cocoa_new(Device device, NSCursor handle) {
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425 Cursor cursor = new Cursor(device);
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426 cursor.handle = handle;
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427 return cursor;
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428 }
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429
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430 }