Mercurial > projects > dwt-mac
annotate dwt/graphics/Device.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 | ab8b5765e3d1 2952d5604c0a |
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.graphics.Device; |
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12 |
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13 import dwt.dwthelper.utils; |
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14 |
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15 import dwt.DWT; |
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16 import dwt.DWTException; |
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17 import dwt.internal.Compatibility; |
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18 import dwt.internal.cocoa.NSArray; |
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19 import dwt.internal.cocoa.NSDictionary; |
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20 import dwt.internal.cocoa.NSFont; |
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21 import dwt.internal.cocoa.NSFontManager; |
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22 import dwt.internal.cocoa.NSRect; |
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23 import dwt.internal.cocoa.NSScreen; |
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24 import dwt.internal.cocoa.NSSize; |
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25 import dwt.internal.cocoa.NSString; |
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26 import dwt.internal.cocoa.NSValue; |
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27 import dwt.internal.cocoa.OS; |
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28 import dwt.internal.cocoa.id; |
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29 |
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30 /** |
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31 * This class is the abstract superclass of all device objects, |
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32 * such as the Display device and the Printer device. Devices |
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33 * can have a graphics context (GC) created for them, and they |
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34 * can be drawn on by sending messages to the associated GC. |
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35 */ |
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36 public abstract class Device implements Drawable { |
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37 |
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38 /* Debugging */ |
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39 public static bool DEBUG; |
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40 bool debug = DEBUG; |
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41 bool tracking = DEBUG; |
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42 Error [] errors; |
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43 Object [] objects; |
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44 Object trackingLock; |
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45 |
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46 /* Disposed flag */ |
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47 bool disposed, warnings; |
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48 |
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49 Color COLOR_BLACK, COLOR_DARK_RED, COLOR_DARK_GREEN, COLOR_DARK_YELLOW, COLOR_DARK_BLUE; |
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50 Color COLOR_DARK_MAGENTA, COLOR_DARK_CYAN, COLOR_GRAY, COLOR_DARK_GRAY, COLOR_RED; |
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51 Color COLOR_GREEN, COLOR_YELLOW, COLOR_BLUE, COLOR_MAGENTA, COLOR_CYAN, COLOR_WHITE; |
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52 |
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53 /* System Font */ |
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54 Font systemFont; |
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55 |
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56 /* |
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57 * TEMPORARY CODE. When a graphics object is |
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58 * created and the device parameter is null, |
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59 * the current Display is used. This presents |
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60 * a problem because DWT graphics does not |
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61 * reference classes in DWT widgets. The correct |
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62 * fix is to remove this feature. Unfortunately, |
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63 * too many application programs rely on this |
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64 * feature. |
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65 * |
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66 * This code will be removed in the future. |
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67 */ |
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68 protected static Device CurrentDevice; |
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69 protected static Runnable DeviceFinder; |
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70 static { |
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71 try { |
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72 Class.forName ("dwt.widgets.Display"); |
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73 } catch (Throwable e) {} |
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74 } |
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75 |
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76 /* |
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77 * TEMPORARY CODE. |
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78 */ |
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79 static synchronized Device getDevice () { |
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80 if (DeviceFinder !is null) DeviceFinder.run(); |
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81 Device device = CurrentDevice; |
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82 CurrentDevice = null; |
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83 return device; |
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84 } |
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85 |
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86 /** |
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87 * Constructs a new instance of this class. |
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88 * <p> |
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89 * You must dispose the device when it is no longer required. |
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90 * </p> |
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91 * |
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92 * @see #create |
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93 * @see #init |
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94 * |
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95 * @since 3.1 |
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96 */ |
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97 public Device() { |
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98 this(null); |
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99 } |
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100 |
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101 /** |
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102 * Constructs a new instance of this class. |
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103 * <p> |
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104 * You must dispose the device when it is no longer required. |
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105 * </p> |
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106 * |
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107 * @param data the DeviceData which describes the receiver |
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108 * |
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109 * @see #create |
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110 * @see #init |
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111 * @see DeviceData |
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112 */ |
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113 public Device(DeviceData data) { |
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114 synchronized (Device.class) { |
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115 if (data !is null) { |
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116 debug = data.debug; |
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117 tracking = data.tracking; |
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118 } |
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119 if (tracking) { |
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120 errors = new Error [128]; |
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121 objects = new Object [128]; |
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122 trackingLock = new Object (); |
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123 } |
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124 create (data); |
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125 init (); |
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126 } |
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127 } |
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128 |
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129 /** |
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130 * Throws an <code>DWTException</code> if the receiver can not |
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131 * be accessed by the caller. This may include both checks on |
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132 * the state of the receiver and more generally on the entire |
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133 * execution context. This method <em>should</em> be called by |
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134 * device implementors to enforce the standard DWT invariants. |
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135 * <p> |
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136 * Currently, it is an error to invoke any method (other than |
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137 * <code>isDisposed()</code> and <code>dispose()</code>) on a |
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138 * device that has had its <code>dispose()</code> method called. |
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139 * </p><p> |
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140 * In future releases of DWT, there may be more or fewer error |
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141 * checks and exceptions may be thrown for different reasons. |
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142 * <p> |
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143 * |
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144 * @exception DWTException <ul> |
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145 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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146 * </ul> |
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147 */ |
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148 protected void checkDevice () { |
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149 if (disposed) DWT.error(DWT.ERROR_DEVICE_DISPOSED); |
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150 } |
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151 |
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152 /** |
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153 * Creates the device in the operating system. If the device |
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154 * does not have a handle, this method may do nothing depending |
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155 * on the device. |
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156 * <p> |
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157 * This method is called before <code>init</code>. |
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158 * </p><p> |
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159 * Subclasses are supposed to reimplement this method and not |
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160 * call the <code>super</code> implementation. |
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161 * </p> |
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162 * |
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163 * @param data the DeviceData which describes the receiver |
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164 * |
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165 * @see #init |
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166 */ |
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167 protected void create (DeviceData data) { |
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168 } |
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169 |
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170 /** |
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171 * Disposes of the operating system resources associated with |
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172 * the receiver. After this method has been invoked, the receiver |
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173 * will answer <code>true</code> when sent the message |
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174 * <code>isDisposed()</code>. |
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175 * |
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176 * @see #release |
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177 * @see #destroy |
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178 * @see #checkDevice |
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179 */ |
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180 public void dispose () { |
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181 synchronized (Device.class) { |
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182 if (isDisposed()) return; |
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183 checkDevice (); |
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184 release (); |
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185 destroy (); |
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186 disposed = true; |
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187 if (tracking) { |
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188 synchronized (trackingLock) { |
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189 objects = null; |
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190 errors = null; |
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191 trackingLock = null; |
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192 } |
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193 } |
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194 } |
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195 } |
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196 |
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197 void dispose_Object (Object object) { |
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198 synchronized (trackingLock) { |
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199 for (int i=0; i<objects.length; i++) { |
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200 if (objects [i] is object) { |
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201 objects [i] = null; |
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202 errors [i] = null; |
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203 return; |
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204 } |
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205 } |
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206 } |
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207 } |
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208 |
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209 /** |
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210 * Destroys the device in the operating system and releases |
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211 * the device's handle. If the device does not have a handle, |
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212 * this method may do nothing depending on the device. |
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213 * <p> |
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214 * This method is called after <code>release</code>. |
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215 * </p><p> |
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216 * Subclasses are supposed to reimplement this method and not |
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217 * call the <code>super</code> implementation. |
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218 * </p> |
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219 * |
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220 * @see #dispose |
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221 * @see #release |
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222 */ |
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223 protected void destroy () { |
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224 } |
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225 |
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226 /** |
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227 * Returns a rectangle describing the receiver's size and location. |
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228 * |
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229 * @return the bounding rectangle |
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230 * |
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231 * @exception DWTException <ul> |
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232 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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233 * </ul> |
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234 */ |
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235 public Rectangle getBounds () { |
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236 checkDevice (); |
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237 NSScreen screen = NSScreen.mainScreen(); |
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238 NSRect rect = screen.frame(); |
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239 return new Rectangle((int)rect.x, (int)rect.y, (int)rect.width, (int)rect.height); |
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240 } |
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241 |
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242 /** |
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243 * Returns a <code>DeviceData</code> based on the receiver. |
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244 * Modifications made to this <code>DeviceData</code> will not |
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245 * affect the receiver. |
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246 * |
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247 * @return a <code>DeviceData</code> containing the device's data and attributes |
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248 * |
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249 * @exception DWTException <ul> |
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250 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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251 * </ul> |
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252 * |
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253 * @see DeviceData |
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254 */ |
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255 public DeviceData getDeviceData () { |
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256 checkDevice(); |
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257 DeviceData data = new DeviceData (); |
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258 data.debug = debug; |
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259 data.tracking = tracking; |
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260 if (tracking) { |
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261 synchronized (trackingLock) { |
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262 int count = 0, length = objects.length; |
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263 for (int i=0; i<length; i++) { |
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264 if (objects [i] !is null) count++; |
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265 } |
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266 int index = 0; |
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267 data.objects = new Object [count]; |
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268 data.errors = new Error [count]; |
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269 for (int i=0; i<length; i++) { |
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270 if (objects [i] !is null) { |
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271 data.objects [index] = objects [i]; |
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272 data.errors [index] = errors [i]; |
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273 index++; |
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274 } |
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275 } |
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276 } |
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277 } else { |
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278 data.objects = new Object [0]; |
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279 data.errors = new Error [0]; |
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280 } |
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281 return data; |
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282 } |
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283 |
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284 /** |
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285 * Returns a rectangle which describes the area of the |
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286 * receiver which is capable of displaying data. |
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287 * |
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288 * @return the client area |
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289 * |
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290 * @exception DWTException <ul> |
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291 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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292 * </ul> |
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293 * |
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294 * @see #getBounds |
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295 */ |
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296 public Rectangle getClientArea () { |
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297 checkDevice (); |
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298 NSScreen screen = NSScreen.mainScreen(); |
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299 NSRect rect = screen.visibleFrame(); |
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300 return new Rectangle((int)rect.x, (int)rect.y, (int)rect.width, (int)rect.height); |
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301 } |
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302 |
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303 /** |
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304 * Returns the bit depth of the screen, which is the number of |
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305 * bits it takes to represent the number of unique colors that |
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306 * the screen is currently capable of displaying. This number |
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307 * will typically be one of 1, 8, 15, 16, 24 or 32. |
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308 * |
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309 * @return the depth of the screen |
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310 * |
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311 * @exception DWTException <ul> |
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312 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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313 * </ul> |
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314 */ |
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315 public int getDepth () { |
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316 checkDevice (); |
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317 return OS.NSBitsPerPixelFromDepth(NSScreen.mainScreen().depth()); |
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318 } |
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319 |
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320 /** |
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321 * Returns a point whose x coordinate is the horizontal |
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322 * dots per inch of the display, and whose y coordinate |
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323 * is the vertical dots per inch of the display. |
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324 * |
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325 * @return the horizontal and vertical DPI |
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326 * |
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327 * @exception DWTException <ul> |
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328 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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329 * </ul> |
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330 */ |
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331 public Point getDPI () { |
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332 checkDevice (); |
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333 NSDictionary dictionary = NSScreen.mainScreen().deviceDescription(); |
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334 NSValue value = new NSValue(dictionary.objectForKey(new id(OS.NSDeviceResolution())).id); |
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335 NSSize size = value.sizeValue(); |
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336 return new Point((int)size.width, (int)size.height); |
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337 } |
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338 |
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339 /** |
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340 * Returns <code>FontData</code> objects which describe |
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341 * the fonts that match the given arguments. If the |
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342 * <code>faceName</code> is null, all fonts will be returned. |
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343 * |
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344 * @param faceName the name of the font to look for, or null |
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345 * @param scalable if true only scalable fonts are returned, otherwise only non-scalable fonts are returned. |
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346 * @return the matching font data |
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347 * |
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348 * @exception DWTException <ul> |
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349 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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350 * </ul> |
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351 */ |
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352 public FontData[] getFontList (String faceName, bool scalable) { |
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353 checkDevice (); |
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354 if (!scalable) return new FontData[0]; |
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355 NSArray fonts = NSFontManager.sharedFontManager().availableFonts(); |
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356 int count = 0; |
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357 FontData[] fds = new FontData[fonts.count()]; |
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358 for (int i = 0; i < fds.length; i++) { |
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359 NSString str = new NSString(fonts.objectAtIndex(i)); |
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360 char[] buffer = new char[str.length()]; |
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361 str.getCharacters_(buffer); |
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362 String nsName = new String(buffer); |
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363 String name = nsName; |
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364 int index = nsName.indexOf('-'); |
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365 if (index !is -1) name = name.substring(0, index); |
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366 int style = DWT.NORMAL; |
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367 if (nsName.indexOf("Italic") !is -1) style |= DWT.ITALIC; |
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368 if (nsName.indexOf("Bold") !is -1) style |= DWT.BOLD; |
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369 if (faceName is null || Compatibility.equalsIgnoreCase(faceName, name)) { |
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370 FontData data = new FontData(name, 0, style); |
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371 data.nsName = nsName; |
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372 fds[count++] = data; |
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373 } |
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374 } |
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375 if (count is fds.length) return fds; |
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376 FontData[] result = new FontData[count]; |
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377 System.arraycopy(fds, 0, result, 0, count); |
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378 return result; |
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379 } |
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380 |
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381 /** |
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382 * Returns the matching standard color for the given |
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383 * constant, which should be one of the color constants |
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384 * specified in class <code>DWT</code>. Any value other |
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385 * than one of the DWT color constants which is passed |
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386 * in will result in the color black. This color should |
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387 * not be freed because it was allocated by the system, |
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388 * not the application. |
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389 * |
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390 * @param id the color constant |
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391 * @return the matching color |
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392 * |
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393 * @exception DWTException <ul> |
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394 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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395 * </ul> |
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396 * |
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397 * @see DWT |
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398 */ |
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399 public Color getSystemColor (int id) { |
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400 checkDevice (); |
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401 switch (id) { |
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402 case DWT.COLOR_BLACK: return COLOR_BLACK; |
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403 case DWT.COLOR_DARK_RED: return COLOR_DARK_RED; |
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404 case DWT.COLOR_DARK_GREEN: return COLOR_DARK_GREEN; |
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405 case DWT.COLOR_DARK_YELLOW: return COLOR_DARK_YELLOW; |
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406 case DWT.COLOR_DARK_BLUE: return COLOR_DARK_BLUE; |
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407 case DWT.COLOR_DARK_MAGENTA: return COLOR_DARK_MAGENTA; |
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408 case DWT.COLOR_DARK_CYAN: return COLOR_DARK_CYAN; |
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409 case DWT.COLOR_GRAY: return COLOR_GRAY; |
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410 case DWT.COLOR_DARK_GRAY: return COLOR_DARK_GRAY; |
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411 case DWT.COLOR_RED: return COLOR_RED; |
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412 case DWT.COLOR_GREEN: return COLOR_GREEN; |
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413 case DWT.COLOR_YELLOW: return COLOR_YELLOW; |
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414 case DWT.COLOR_BLUE: return COLOR_BLUE; |
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415 case DWT.COLOR_MAGENTA: return COLOR_MAGENTA; |
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416 case DWT.COLOR_CYAN: return COLOR_CYAN; |
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417 case DWT.COLOR_WHITE: return COLOR_WHITE; |
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418 } |
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419 return COLOR_BLACK; |
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420 } |
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421 |
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422 /** |
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423 * Returns a reasonable font for applications to use. |
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424 * On some platforms, this will match the "default font" |
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425 * or "system font" if such can be found. This font |
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426 * should not be freed because it was allocated by the |
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427 * system, not the application. |
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428 * <p> |
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429 * Typically, applications which want the default look |
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430 * should simply not set the font on the widgets they |
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431 * create. Widgets are always created with the correct |
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432 * default font for the class of user-interface component |
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433 * they represent. |
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434 * </p> |
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435 * |
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436 * @return a font |
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437 * |
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438 * @exception DWTException <ul> |
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439 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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440 * </ul> |
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441 */ |
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442 public Font getSystemFont () { |
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443 checkDevice (); |
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444 return systemFont; |
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445 } |
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446 |
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447 /** |
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448 * Returns <code>true</code> if the underlying window system prints out |
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449 * warning messages on the console, and <code>setWarnings</code> |
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450 * had previously been called with <code>true</code>. |
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451 * |
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452 * @return <code>true</code>if warnings are being handled, and <code>false</code> otherwise |
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453 * |
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454 * @exception DWTException <ul> |
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455 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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456 * </ul> |
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457 */ |
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458 public bool getWarnings () { |
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459 checkDevice (); |
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460 return warnings; |
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461 } |
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462 |
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463 /** |
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464 * Initializes any internal resources needed by the |
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465 * device. |
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466 * <p> |
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467 * This method is called after <code>create</code>. |
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468 * </p><p> |
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469 * If subclasses reimplement this method, they must |
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470 * call the <code>super</code> implementation. |
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471 * </p> |
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472 * |
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473 * @see #create |
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474 */ |
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475 protected void init () { |
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476 /* Create the standard colors */ |
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477 COLOR_BLACK = new Color (this, 0,0,0); |
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478 COLOR_DARK_RED = new Color (this, 0x80,0,0); |
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479 COLOR_DARK_GREEN = new Color (this, 0,0x80,0); |
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480 COLOR_DARK_YELLOW = new Color (this, 0x80,0x80,0); |
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481 COLOR_DARK_BLUE = new Color (this, 0,0,0x80); |
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482 COLOR_DARK_MAGENTA = new Color (this, 0x80,0,0x80); |
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483 COLOR_DARK_CYAN = new Color (this, 0,0x80,0x80); |
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484 COLOR_GRAY = new Color (this, 0xC0,0xC0,0xC0); |
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485 COLOR_DARK_GRAY = new Color (this, 0x80,0x80,0x80); |
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486 COLOR_RED = new Color (this, 0xFF,0,0); |
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487 COLOR_GREEN = new Color (this, 0,0xFF,0); |
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488 COLOR_YELLOW = new Color (this, 0xFF,0xFF,0); |
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489 COLOR_BLUE = new Color (this, 0,0,0xFF); |
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490 COLOR_MAGENTA = new Color (this, 0xFF,0,0xFF); |
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491 COLOR_CYAN = new Color (this, 0,0xFF,0xFF); |
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492 COLOR_WHITE = new Color (this, 0xFF,0xFF,0xFF); |
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493 |
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494 /* Initialize the system font slot */ |
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495 NSFont font = NSFont.systemFontOfSize(NSFont.systemFontSize()); |
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496 systemFont = Font.cocoa_new(this, font); |
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497 } |
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498 |
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499 /** |
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500 * Invokes platform specific functionality to allocate a new GC handle. |
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501 * <p> |
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502 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
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503 * API for <code>Device</code>. It is marked public only so that it |
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504 * can be shared within the packages provided by DWT. It is not |
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505 * available on all platforms, and should never be called from |
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506 * application code. |
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507 * </p> |
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508 * |
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509 * @param data the platform specific GC data |
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510 * @return the platform specific GC handle |
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511 */ |
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512 public abstract int internal_new_GC (GCData data); |
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513 |
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514 /** |
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515 * Invokes platform specific functionality to dispose a GC handle. |
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516 * <p> |
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517 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
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518 * API for <code>Device</code>. It is marked public only so that it |
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519 * can be shared within the packages provided by DWT. It is not |
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520 * available on all platforms, and should never be called from |
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521 * application code. |
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522 * </p> |
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523 * |
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524 * @param hDC the platform specific GC handle |
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525 * @param data the platform specific GC data |
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526 */ |
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527 public abstract void internal_dispose_GC (int handle, GCData data); |
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528 |
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529 /** |
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530 * Returns <code>true</code> if the device has been disposed, |
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531 * and <code>false</code> otherwise. |
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532 * <p> |
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533 * This method gets the dispose state for the device. |
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534 * When a device has been disposed, it is an error to |
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535 * invoke any other method using the device. |
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536 * |
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537 * @return <code>true</code> when the device is disposed and <code>false</code> otherwise |
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538 */ |
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539 public bool isDisposed () { |
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540 synchronized (Device.class) { |
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541 return disposed; |
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542 } |
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543 } |
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544 |
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545 /** |
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546 * Loads the font specified by a file. The font will be |
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547 * present in the list of fonts available to the application. |
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548 * |
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549 * @param path the font file path |
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550 * @return whether the font was successfully loaded |
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551 * |
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552 * @exception DWTException <ul> |
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553 * <li>ERROR_NULL_ARGUMENT - if path is null</li> |
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554 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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555 * </ul> |
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556 * |
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557 * @see Font |
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558 * |
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559 * @since 3.3 |
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560 */ |
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561 public bool loadFont (String path) { |
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562 checkDevice(); |
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563 if (path is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
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564 bool result = false; |
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565 char [] chars = new char [path.length ()]; |
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566 path.getChars (0, chars.length, chars, 0); |
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567 return result; |
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568 } |
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|
569 |
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570 void new_Object (Object object) { |
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571 synchronized (trackingLock) { |
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572 for (int i=0; i<objects.length; i++) { |
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573 if (objects [i] is null) { |
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574 objects [i] = object; |
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575 errors [i] = new Error (); |
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576 return; |
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577 } |
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578 } |
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579 Object [] newObjects = new Object [objects.length + 128]; |
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580 System.arraycopy (objects, 0, newObjects, 0, objects.length); |
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581 newObjects [objects.length] = object; |
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582 objects = newObjects; |
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583 Error [] newErrors = new Error [errors.length + 128]; |
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584 System.arraycopy (errors, 0, newErrors, 0, errors.length); |
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585 newErrors [errors.length] = new Error (); |
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586 errors = newErrors; |
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587 } |
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588 } |
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589 |
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590 /** |
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591 * Releases any internal resources back to the operating |
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592 * system and clears all fields except the device handle. |
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593 * <p> |
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594 * When a device is destroyed, resources that were acquired |
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595 * on behalf of the programmer need to be returned to the |
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596 * operating system. For example, if the device allocated a |
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597 * font to be used as the system font, this font would be |
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598 * freed in <code>release</code>. Also,to assist the garbage |
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599 * collector and minimize the amount of memory that is not |
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600 * reclaimed when the programmer keeps a reference to a |
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601 * disposed device, all fields except the handle are zero'd. |
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602 * The handle is needed by <code>destroy</code>. |
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603 * </p> |
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604 * This method is called before <code>destroy</code>. |
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605 * </p><p> |
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606 * If subclasses reimplement this method, they must |
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607 * call the <code>super</code> implementation. |
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608 * </p> |
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609 * |
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610 * @see #dispose |
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611 * @see #destroy |
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612 */ |
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613 protected void release () { |
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614 COLOR_BLACK = COLOR_DARK_RED = COLOR_DARK_GREEN = COLOR_DARK_YELLOW = COLOR_DARK_BLUE = |
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615 COLOR_DARK_MAGENTA = COLOR_DARK_CYAN = COLOR_GRAY = COLOR_DARK_GRAY = COLOR_RED = |
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616 COLOR_GREEN = COLOR_YELLOW = COLOR_BLUE = COLOR_MAGENTA = COLOR_CYAN = COLOR_WHITE = null; |
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617 } |
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618 |
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619 /** |
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620 * If the underlying window system supports printing warning messages |
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621 * to the console, setting warnings to <code>false</code> prevents these |
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622 * messages from being printed. If the argument is <code>true</code> then |
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623 * message printing is not blocked. |
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624 * |
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625 * @param warnings <code>true</code>if warnings should be printed, and <code>false</code> otherwise |
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626 * |
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627 * @exception DWTException <ul> |
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628 * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
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629 * </ul> |
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630 */ |
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631 public void setWarnings (bool warnings) { |
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632 checkDevice (); |
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633 this.warnings = warnings; |
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634 } |
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635 |
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636 } |