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annotate dwt/widgets/Canvas.d @ 51:e6f04eb518ae

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Updated Canvas to 3.514
author Jacob Carlborg <doob@me.com>
date Sun, 07 Dec 2008 21:24:13 +0100
parents cfa563df4fdd
children c74ba20de292
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <doob@me.com>
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13 *******************************************************************************/
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14 module dwt.widgets.Canvas;
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16
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17 import dwt.DWT;
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18 import dwt.DWTException;
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19 import dwt.graphics.Font;
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20 import dwt.graphics.GC;
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21 import dwt.graphics.Image;
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22 import dwt.graphics.Rectangle;
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23 import dwt.internal.cocoa.NSBezierPath;
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24 import dwt.internal.cocoa.NSColor;
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25 import dwt.internal.cocoa.NSCursor;
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26 import dwt.internal.cocoa.NSEvent;
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27 import dwt.internal.cocoa.NSGraphicsContext;
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28 import dwt.internal.cocoa.NSPoint;
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29 import dwt.internal.cocoa.NSRange;
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30 import dwt.internal.cocoa.NSRect;
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31 import dwt.internal.cocoa.NSSize;
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32 import dwt.internal.cocoa.OS;
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34 import dwt.dwthelper.utils;
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35 import dwt.internal.objc.cocoa.Cocoa;
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36 import dwt.widgets.Caret;
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37 import dwt.widgets.Composite;
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38 import dwt.widgets.Control;
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39 import dwt.widgets.IME;
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40
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41 /**
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42 * Instances of this class provide a surface for drawing
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43 * arbitrary graphics.
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44 * <dl>
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45 * <dt><b>Styles:</b></dt>
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46 * <dd>(none)</dd>
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47 * <dt><b>Events:</b></dt>
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48 * <dd>(none)</dd>
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49 * </dl>
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50 * <p>
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51 * This class may be subclassed by custom control implementors
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52 * who are building controls that are <em>not</em> constructed
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53 * from aggregates of other controls. That is, they are either
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54 * painted using DWT graphics calls or are handled by native
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55 * methods.
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56 * </p>
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57 *
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58 * @see Composite
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59 * @see <a href="http://www.eclipse.org/swt/snippets/#canvas">Canvas snippets</a>
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60 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a>
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61 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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62 */
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63 public class Canvas : Composite {
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64 Caret caret;
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65 IME ime;
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66
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67 this () {
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68 /* Do nothing */
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69 }
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70
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71 objc.id attributedSubstringFromRange (objc.id id, objc.SEL sel, objc.id range) {
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72 if (ime !is null) return ime.attributedSubstringFromRange (id, sel, range);
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73 return super.attributedSubstringFromRange(id, sel, range);
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74 }
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76 bool becomeFirstResponder (objc.id id, objc.SEL sel) {
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77 if (caret !is null) caret.setFocus ();
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78 return super.becomeFirstResponder(id, sel);
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79 }
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81 bool resignFirstResponder (objc.id id, objc.SEL sel) {
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82 if (caret !is null) caret.killFocus ();
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83 return super.resignFirstResponder(id, sel);
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84 }
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85
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86
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87 /**
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88 * Constructs a new instance of this class given its parent
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89 * and a style value describing its behavior and appearance.
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90 * <p>
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91 * The style value is either one of the style constants defined in
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92 * class <code>DWT</code> which is applicable to instances of this
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93 * class, or must be built by <em>bitwise OR</em>'ing together
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94 * (that is, using the <code>int</code> "|" operator) two or more
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95 * of those <code>DWT</code> style constants. The class description
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96 * lists the style constants that are applicable to the class.
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97 * Style bits are also inherited from superclasses.
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98 * </p>
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99 *
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100 * @param parent a composite control which will be the parent of the new instance (cannot be null)
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101 * @param style the style of control to construct
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102 *
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103 * @exception IllegalArgumentException <ul>
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104 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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105 * </ul>
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106 * @exception DWTException <ul>
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107 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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108 * </ul>
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109 *
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110 * @see DWT
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111 * @see Widget#checkSubclass
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112 * @see Widget#getStyle
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113 */
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114 public this (Composite parent, int style) {
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115 super (parent, style);
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116 }
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117
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118 NSInteger characterIndexForPoint (objc.id id, objc.SEL sel, objc.id point) {
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119 if (ime !is null) return ime.characterIndexForPoint (id, sel, point);
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120 return super.characterIndexForPoint (id, sel, point);
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121 }
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122
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123 /**
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124 * Fills the interior of the rectangle specified by the arguments,
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125 * with the receiver's background.
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126 *
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127 * @param gc the gc where the rectangle is to be filled
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128 * @param x the x coordinate of the rectangle to be filled
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129 * @param y the y coordinate of the rectangle to be filled
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130 * @param width the width of the rectangle to be filled
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131 * @param height the height of the rectangle to be filled
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132 *
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133 * @exception IllegalArgumentException <ul>
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134 * <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
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135 * <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li>
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136 * </ul>
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137 * @exception DWTException <ul>
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138 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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139 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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140 * </ul>
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141 *
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142 * @since 3.2
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143 */
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144 public void drawBackground (GC gc, int x, int y, int width, int height) {
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145 checkWidget ();
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146 if (gc is null) error (DWT.ERROR_NULL_ARGUMENT);
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147 if (gc.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
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148 Control control = findBackgroundControl ();
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149 if (control !is null) {
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150 NSRect rect = NSRect();
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151 rect.x = x;
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152 rect.y = y;
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153 rect.width = width;
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154 rect.height = height;
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155 control.fillBackground (view, gc.handle, rect);
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156 } else {
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157 gc.fillRectangle (x, y, width, height);
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158 }
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159 }
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160
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161 void drawWidget (objc.id id, NSRect rect) {
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162 super.drawWidget (id, rect);
0
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163 if (caret is null) return;
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164 if (caret.isShowing) {
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165 NSGraphicsContext context = NSGraphicsContext.currentContext();
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166
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167 Image image = caret.image;
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168 if (image !is null) {
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169 NSRect fromRect = NSRect ();
0
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170 NSSize size = image.handle.size();
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171 fromRect.width = size.width;
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172 fromRect.height = size.height;
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173 NSPoint point = NSPoint();
0
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174 point.x = caret.x;
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175 point.y = caret.y;
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176 image.handle.drawAtPoint(point, rect, OS.NSCompositeXOR, 1);
0
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177 } else {
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178 context.saveGraphicsState();
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179 context.setCompositingOperation(OS.NSCompositeXOR);
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180 NSRect drawRect = NSRect();
0
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181 drawRect.x = caret.x;
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182 drawRect.y = caret.y;
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183 drawRect.width = caret.width !is 0 ? caret.width : Caret.DEFAULT_WIDTH;
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184 drawRect.height = caret.height;
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185 context.setShouldAntialias(false);
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186 NSColor color = NSColor.colorWithDeviceRed(1, 1, 1, 1);
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187 color.set();
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188 NSBezierPath.fillRect(drawRect);
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189 context.restoreGraphicsState();
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190 }
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191 }
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192 }
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193
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194 NSRect firstRectForCharacterRange (objc.id id, objc.SEL sel, objc.id range) {
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195 if (ime !is null) return ime.firstRectForCharacterRange (id, sel, range);
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196 return super.firstRectForCharacterRange (id, sel, range);
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197 }
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198
0
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199 /**
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200 * Returns the caret.
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201 * <p>
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202 * The caret for the control is automatically hidden
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203 * and shown when the control is painted or resized,
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204 * when focus is gained or lost and when an the control
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205 * is scrolled. To avoid drawing on top of the caret,
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206 * the programmer must hide and show the caret when
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207 * drawing in the window any other time.
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208 * </p>
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209 *
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210 * @return the caret for the receiver, may be null
0
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211 *
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212 * @exception DWTException <ul>
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213 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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214 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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215 * </ul>
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216 */
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217 public Caret getCaret () {
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218 checkWidget();
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219 return caret;
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220 }
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221
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222 /**
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223 * Returns the IME.
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224 *
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225 * @return the IME
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226 *
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227 * @exception DWTException <ul>
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228 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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229 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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230 * </ul>
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231 *
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232 * @since 3.4
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233 */
0
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234 public IME getIME () {
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235 checkWidget();
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236 return ime;
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237 }
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238
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239 bool hasMarkedText (objc.id id, objc.SEL sel) {
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240 if (ime !is null) return ime.hasMarkedText (id, sel);
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241 return super.hasMarkedText (id, sel);
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242 }
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243
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244 bool insertText (objc.id id, objc.SEL sel, objc.id string) {
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245 if (ime !is null) {
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246 if (!ime.insertText (id, sel, string)) return false;
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247 }
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248 return super.insertText (id, sel, string);
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249 }
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250
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251 NSRange markedRange (objc.id id, objc.SEL sel) {
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252 if (ime !is null) return ime.markedRange (id, sel);
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253 return super.markedRange (id, sel);
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254 }
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255
0
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256 //void redrawWidget (int control, bool children) {
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257 // bool isFocus = OS.VERSION < 0x1040 && caret !is null && caret.isFocusCaret ();
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258 // if (isFocus) caret.killFocus ();
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259 // super.redrawWidget (control, children);
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260 // if (isFocus) caret.setFocus ();
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261 //}
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262 //
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263 //void redrawWidget (int control, int x, int y, int width, int height, bool all) {
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264 // bool isFocus = OS.VERSION < 0x1040 && caret !is null && caret.isFocusCaret ();
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265 // if (isFocus) caret.killFocus ();
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266 // super.redrawWidget (control, x, y, width, height, all);
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267 // if (isFocus) caret.setFocus ();
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268 //}
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269
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270 void releaseChildren (bool destroy) {
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271 if (caret !is null) {
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272 caret.release (false);
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273 caret = null;
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274 }
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275 if (ime !is null) {
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276 ime.release (false);
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277 ime = null;
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278 }
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279 super.releaseChildren (destroy);
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280 }
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281
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282 /**
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283 * Scrolls a rectangular area of the receiver by first copying
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284 * the source area to the destination and then causing the area
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285 * of the source which is not covered by the destination to
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286 * be repainted. Children that intersect the rectangle are
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287 * optionally moved during the operation. In addition, outstanding
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288 * paint events are flushed before the source area is copied to
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289 * ensure that the contents of the canvas are drawn correctly.
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290 *
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291 * @param destX the x coordinate of the destination
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292 * @param destY the y coordinate of the destination
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293 * @param x the x coordinate of the source
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294 * @param y the y coordinate of the source
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295 * @param width the width of the area
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296 * @param height the height of the area
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297 * @param all <code>true</code>if children should be scrolled, and <code>false</code> otherwise
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298 *
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299 * @exception DWTException <ul>
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300 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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301 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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302 * </ul>
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303 */
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304 public void scroll (int destX, int destY, int x, int y, int width, int height, bool all) {
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305 checkWidget();
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306 if (width <= 0 || height <= 0) return;
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307 int deltaX = destX - x, deltaY = destY - y;
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308 if (deltaX is 0 && deltaY is 0) return;
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309 // if (!isDrawing (handle)) return;
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310 bool isFocus = caret !is null && caret.isFocusCaret ();
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311 if (isFocus) caret.killFocus ();
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312 Rectangle clientRect = getClientArea ();
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313 Rectangle sourceRect = new Rectangle (x, y, width, height);
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314 if (sourceRect.intersects (clientRect)) {
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315 update (all);
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316 }
23
9414ecde7ba7 Ported dwt.widgets.Canvas
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317 NSRect damage = NSRect();
0
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318 damage.x = x;
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319 damage.y = y;
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320 damage.width = width;
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321 damage.height = height;
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322 view.setNeedsDisplayInRect(damage);
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323 damage.x = destX;
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324 damage.y = destY;
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325 view.setNeedsDisplayInRect(damage);
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326 // Control control = findBackgroundControl ();
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327 // if ((control !is null && control.backgroundImage !is null)) {
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328 // redrawWidget (handle, x, y, width, height, false);
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329 // redrawWidget (handle, destX, destY, width, height, false);
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330 // } else {
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331 // GC gc = new GC (this);
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332 // gc.copyArea (x, y, width, height, destX, destY);
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333 // gc.dispose ();
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334 // }
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335 if (all) {
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336 Control [] children = _getChildren ();
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337 for (int i=0; i<children.length; i++) {
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338 Control child = children [i];
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339 Rectangle rect = child.getBounds ();
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340 if (Math.min(x + width, rect.x + rect.width) >= Math.max (x, rect.x) &&
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341 Math.min(y + height, rect.y + rect.height) >= Math.max (y, rect.y)) {
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342 child.setLocation (rect.x + deltaX, rect.y + deltaY);
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343 }
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344 }
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345 }
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346 if (isFocus) caret.setFocus ();
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347 }
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348
51
e6f04eb518ae Updated Canvas to 3.514
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349 NSRange selectedRange (objc.id id, objc.SEL sel) {
45
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350 if (ime !is null) return ime.selectedRange (id, sel);
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351 return super.selectedRange (id, sel);
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352 }
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353
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354 bool sendKeyEvent (NSEvent nsEvent, int type) {
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355 if (caret !is null) NSCursor.setHiddenUntilMouseMoves (true);
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356 return super.sendKeyEvent (nsEvent, type);
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357 }
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358
0
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359 /**
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360 * Sets the receiver's caret.
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361 * <p>
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362 * The caret for the control is automatically hidden
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363 * and shown when the control is painted or resized,
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364 * when focus is gained or lost and when an the control
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365 * is scrolled. To avoid drawing on top of the caret,
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366 * the programmer must hide and show the caret when
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367 * drawing in the window any other time.
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368 * </p>
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369 * @param caret the new caret for the receiver, may be null
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370 *
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371 * @exception IllegalArgumentException <ul>
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372 * <li>ERROR_INVALID_ARGUMENT - if the caret has been disposed</li>
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373 * </ul>
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374 * @exception DWTException <ul>
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375 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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376 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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377 * </ul>
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378 */
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379 public void setCaret (Caret caret) {
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380 checkWidget();
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381 Caret newCaret = caret;
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382 Caret oldCaret = this.caret;
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383 this.caret = newCaret;
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384 if (hasFocus ()) {
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385 if (oldCaret !is null) oldCaret.killFocus ();
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386 if (newCaret !is null) {
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387 if (newCaret.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
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388 newCaret.setFocus ();
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389 }
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390 }
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391 }
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392
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393 public void setFont (Font font) {
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394 checkWidget ();
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395 if (caret !is null) caret.setFont (font);
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396 super.setFont (font);
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397 }
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398
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399 /**
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400 * Sets the receiver's IME.
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401 *
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402 * @param ime the new IME for the receiver, may be null
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403 *
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404 * @exception IllegalArgumentException <ul>
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405 * <li>ERROR_INVALID_ARGUMENT - if the IME has been disposed</li>
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406 * </ul>
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407 * @exception DWTException <ul>
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408 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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409 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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410 * </ul>
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411 *
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412 * @since 3.4
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413 */
0
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414 public void setIME (IME ime) {
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415 checkWidget ();
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416 if (ime !is null && ime.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
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417 this.ime = ime;
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418 }
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419
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420 bool setMarkedText_selectedRange (objc.id id, objc.SEL sel, objc.id string, objc.id range) {
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421 if (ime !is null) {
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422 if (!ime.setMarkedText_selectedRange (id, sel, string, range)) return false;
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423 }
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424 return super.setMarkedText_selectedRange (id, sel, string, range);
0
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425 }
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426
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427 objc.id validAttributesForMarkedText (objc.id id, objc.SEL sel) {
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428 if (ime !is null) return ime.validAttributesForMarkedText (id, sel);
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429 return super.validAttributesForMarkedText(id, sel);
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430 }
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431
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432 }