Mercurial > projects > dwt-addons
annotate dwtx/draw2d/SWTEventDispatcher.d @ 98:95307ad235d9
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 03 Aug 2008 00:52:14 +0200 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2007 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 * Port to the D programming language: |
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11 * Frank Benoit <benoit@tionex.de> |
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12 *******************************************************************************/ |
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13 module dwtx.draw2d.SWTEventDispatcher; |
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14 |
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15 import dwt.dwthelper.utils; |
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16 |
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17 import dwt.DWT; |
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18 import dwt.accessibility.AccessibleControlEvent; |
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19 import dwt.accessibility.AccessibleControlListener; |
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20 import dwt.accessibility.AccessibleEvent; |
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21 import dwt.accessibility.AccessibleListener; |
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22 import dwt.events.DisposeEvent; |
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23 import dwt.events.TraverseEvent; |
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24 import dwt.graphics.Cursor; |
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25 import dwt.widgets.Control; |
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26 import dwtx.draw2d.EventDispatcher; |
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27 import dwtx.draw2d.IFigure; |
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28 import dwtx.draw2d.Figure; |
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29 import dwtx.draw2d.MouseEvent; |
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30 import dwtx.draw2d.FocusEvent; |
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31 import dwtx.draw2d.KeyEvent; |
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32 import dwtx.draw2d.ToolTipHelper; |
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33 static import dwt.widgets.Control; |
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34 import dwtx.draw2d.FocusTraverseManager; |
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35 static import dwt.events.FocusEvent; |
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36 static import dwt.events.KeyEvent; |
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37 static import dwt.events.MouseEvent; |
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38 |
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39 /** |
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40 * The SWTEventDispatcher provides draw2d with the ability to dispatch DWT Events. The |
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41 * {@link dwtx.draw2d.LightweightSystem} adds DWT event listeners on its Canvas. |
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42 * When the Canvas receives an DWT event, it calls the appropriate dispatcher method in |
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43 * SWTEventDispatcher. |
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44 */ |
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45 public class SWTEventDispatcher |
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46 : EventDispatcher |
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47 { |
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48 |
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49 /** |
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50 * Used to tell if any button is pressed without regard to the specific button. |
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51 * @deprecated Use {@link DWT#BUTTON_MASK} instead. |
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52 */ |
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53 protected static const int ANY_BUTTON = DWT.BUTTON_MASK; |
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54 |
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55 private bool figureTraverse = true; |
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56 |
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57 private bool captured; |
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58 private IFigure root; |
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59 private IFigure mouseTarget; |
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60 private IFigure cursorTarget; |
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61 private IFigure focusOwner; |
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62 private IFigure hoverSource; |
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63 |
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64 private MouseEvent currentEvent; |
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65 private Cursor cursor; |
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66 /** The control this dispatcher is listening to. */ |
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67 protected dwt.widgets.Control.Control control; |
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68 |
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69 private ToolTipHelper toolTipHelper; |
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70 private FocusTraverseManager focusManager; |
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71 |
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72 /** |
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73 * Implements {@link EventDispatcher.AccessibilityDispatcher} but |
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74 * does nothing in the implementation. |
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75 */ |
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76 protected class FigureAccessibilityDispatcher |
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77 : AccessibilityDispatcher |
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78 { |
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79 /** @see AccessibleControlListener#getChildAtPoint(AccessibleControlEvent) */ |
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80 public void getChildAtPoint(AccessibleControlEvent e) { } |
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81 /** @see AccessibleControlListener#getChildCount(AccessibleControlEvent) */ |
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82 public void getChildCount(AccessibleControlEvent e) { } |
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83 /** @see AccessibleControlListener#getChildren(AccessibleControlEvent) */ |
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84 public void getChildren(AccessibleControlEvent e) { } |
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85 /** @see AccessibleControlListener#getDefaultAction(AccessibleControlEvent) */ |
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86 public void getDefaultAction(AccessibleControlEvent e) { } |
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87 /** @see AccessibleListener#getDescription(AccessibleEvent) */ |
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88 public void getDescription(AccessibleEvent e) { } |
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89 /** @see AccessibleControlListener#getFocus(AccessibleControlEvent) */ |
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90 public void getFocus(AccessibleControlEvent e) { } |
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91 /** @see AccessibleListener#getHelp(AccessibleEvent) */ |
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92 public void getHelp(AccessibleEvent e) { } |
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93 /** @see AccessibleListener#getKeyboardShortcut(AccessibleEvent) */ |
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94 public void getKeyboardShortcut(AccessibleEvent e) { } |
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95 /** @see AccessibleControlListener#getLocation(AccessibleControlEvent) */ |
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96 public void getLocation(AccessibleControlEvent e) { } |
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97 /** @see AccessibleListener#getName(AccessibleEvent) */ |
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98 public void getName(AccessibleEvent e) { } |
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99 /** @see AccessibleControlListener#getRole(AccessibleControlEvent) */ |
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100 public void getRole(AccessibleControlEvent e) { } |
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101 /** @see AccessibleControlListener#getSelection(AccessibleControlEvent) */ |
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102 public void getSelection(AccessibleControlEvent e) { } |
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103 /** @see AccessibleControlListener#getState(AccessibleControlEvent) */ |
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104 public void getState(AccessibleControlEvent e) { } |
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105 /** @see AccessibleControlListener#getValue(AccessibleControlEvent) */ |
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106 public void getValue(AccessibleControlEvent e) { } |
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107 } |
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108 |
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109 public this(){ |
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110 focusManager = new FocusTraverseManager(); |
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111 } |
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112 |
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113 /** |
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114 * @see EventDispatcher#dispatchFocusGained(dwt.events.FocusEvent) |
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115 */ |
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116 public void dispatchFocusGained(dwt.events.FocusEvent.FocusEvent e) { |
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117 IFigure currentFocusOwner = getFocusTraverseManager().getCurrentFocusOwner(); |
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118 |
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119 /* |
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120 * Upon focus gained, if there is no current focus owner, |
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121 * set focus on first focusable child. |
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122 */ |
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123 if (currentFocusOwner is null) |
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124 currentFocusOwner = |
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125 getFocusTraverseManager().getNextFocusableFigure(root, focusOwner); |
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126 setFocus(currentFocusOwner); |
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127 } |
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128 |
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129 /** |
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130 * @see EventDispatcher#dispatchFocusLost(dwt.events.FocusEvent) |
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131 */ |
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132 public void dispatchFocusLost(dwt.events.FocusEvent.FocusEvent e) { |
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133 setFocus(null); |
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134 } |
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135 |
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136 /** |
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137 * @see EventDispatcher#dispatchKeyPressed(dwt.events.KeyEvent) |
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138 */ |
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139 public void dispatchKeyPressed(dwt.events.KeyEvent.KeyEvent e) { |
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140 if (focusOwner !is null) { |
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141 KeyEvent event = new KeyEvent(this, focusOwner, e); |
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142 focusOwner.handleKeyPressed(event); |
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143 } |
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144 } |
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145 |
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146 /** |
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147 * @see EventDispatcher#dispatchKeyReleased(dwt.events.KeyEvent) |
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148 */ |
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149 public void dispatchKeyReleased(dwt.events.KeyEvent.KeyEvent e) { |
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150 if (focusOwner !is null) { |
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151 KeyEvent event = new KeyEvent(this, focusOwner, e); |
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152 focusOwner.handleKeyReleased(event); |
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153 } |
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154 } |
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155 |
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156 /** |
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157 * @see EventDispatcher#dispatchKeyTraversed(TraverseEvent) |
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158 */ |
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159 public void dispatchKeyTraversed(TraverseEvent e) { |
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160 if (!figureTraverse) |
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161 return; |
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162 IFigure nextFigure = null; |
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163 |
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164 if (e.detail is DWT.TRAVERSE_TAB_NEXT) |
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165 nextFigure = getFocusTraverseManager().getNextFocusableFigure(root, focusOwner); |
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166 else if (e.detail is DWT.TRAVERSE_TAB_PREVIOUS) |
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167 nextFigure = |
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168 getFocusTraverseManager().getPreviousFocusableFigure(root, focusOwner); |
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169 |
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170 if (nextFigure !is null) { |
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171 e.doit = false; |
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172 setFocus(nextFigure); |
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173 } |
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174 } |
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175 |
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176 /** |
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177 * @see EventDispatcher#dispatchMouseHover(dwt.events.MouseEvent) |
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178 */ |
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179 public void dispatchMouseHover(dwt.events.MouseEvent.MouseEvent me) { |
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180 receive(me); |
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181 if (mouseTarget !is null) |
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182 mouseTarget.handleMouseHover(currentEvent); |
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183 /* |
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184 * Check Tooltip source. |
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185 * Get Tooltip source's Figure. |
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186 * Set that tooltip as the lws contents on the helper. |
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187 */ |
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188 if (hoverSource !is null) { |
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189 toolTipHelper = getToolTipHelper(); |
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190 IFigure tip = hoverSource.getToolTip(); |
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191 Control control = cast(Control)me.getSource(); |
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192 dwt.graphics.Point.Point absolute; |
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193 absolute = control.toDisplay(new dwt.graphics.Point.Point(me.x, me.y)); |
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194 toolTipHelper.displayToolTipNear(hoverSource, tip, absolute.x, absolute.y); |
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195 } |
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196 } |
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197 |
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198 /** |
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199 * @see EventDispatcher#dispatchMouseDoubleClicked(dwt.events.MouseEvent) |
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200 */ |
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201 public void dispatchMouseDoubleClicked(dwt.events.MouseEvent.MouseEvent me) { |
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202 receive(me); |
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203 if (mouseTarget !is null) |
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204 mouseTarget.handleMouseDoubleClicked(currentEvent); |
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205 } |
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206 |
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207 /** |
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208 * @see EventDispatcher#dispatchMouseEntered(dwt.events.MouseEvent) |
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209 */ |
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210 public void dispatchMouseEntered(dwt.events.MouseEvent.MouseEvent me) { |
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211 receive(me); |
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212 } |
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213 |
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214 /** |
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215 * @see EventDispatcher#dispatchMouseExited(dwt.events.MouseEvent) |
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216 */ |
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217 public void dispatchMouseExited(dwt.events.MouseEvent.MouseEvent me) { |
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218 setHoverSource(null, me); |
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219 if (mouseTarget !is null) { |
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220 currentEvent = |
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221 new MouseEvent(me.x, me.y, this, mouseTarget, me.button, me.stateMask); |
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222 mouseTarget.handleMouseExited(currentEvent); |
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223 releaseCapture(); |
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224 mouseTarget = null; |
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225 } |
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226 } |
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227 |
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228 /** |
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229 * @see EventDispatcher#dispatchMousePressed(dwt.events.MouseEvent) |
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230 */ |
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231 public void dispatchMousePressed(dwt.events.MouseEvent.MouseEvent me) { |
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232 receive(me); |
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233 if (mouseTarget !is null) { |
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234 mouseTarget.handleMousePressed(currentEvent); |
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235 if (currentEvent.isConsumed()) |
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236 setCapture(mouseTarget); |
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237 } |
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238 } |
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239 |
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240 /** |
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241 * @see EventDispatcher#dispatchMouseMoved(dwt.events.MouseEvent) |
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242 */ |
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243 public void dispatchMouseMoved(dwt.events.MouseEvent.MouseEvent me) { |
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244 receive(me); |
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245 if (mouseTarget !is null) { |
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246 if ((me.stateMask & DWT.BUTTON_MASK) !is 0) |
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247 mouseTarget.handleMouseDragged(currentEvent); |
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248 else |
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249 mouseTarget.handleMouseMoved(currentEvent); |
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250 } |
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251 } |
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252 |
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253 /** |
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254 * @see EventDispatcher#dispatchMouseReleased(dwt.events.MouseEvent) |
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255 */ |
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256 public void dispatchMouseReleased(dwt.events.MouseEvent.MouseEvent me) { |
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257 receive(me); |
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258 if (mouseTarget !is null) { |
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259 mouseTarget.handleMouseReleased(currentEvent); |
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260 } |
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261 releaseCapture(); |
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262 receive(me); |
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263 } |
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264 |
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265 /** |
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266 * @see EventDispatcher#getAccessibilityDispatcher() |
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267 */ |
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268 protected AccessibilityDispatcher getAccessibilityDispatcher() { |
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269 return null; |
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270 } |
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271 |
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272 /** |
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273 * Returns the current mouse event. |
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274 * @return the current mouse event; can be <code>null</code> |
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275 */ |
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276 protected MouseEvent getCurrentEvent() { |
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277 return currentEvent; |
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278 } |
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279 |
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280 private IFigure getCurrentToolTip() { |
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281 if (hoverSource !is null) |
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282 return hoverSource.getToolTip(); |
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283 else |
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284 return null; |
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285 } |
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286 |
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287 /** |
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288 * Returns the figure that the cursor is over. |
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289 * @return the cursor target |
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290 */ |
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291 protected IFigure getCursorTarget() { |
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292 return cursorTarget; |
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293 } |
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294 |
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295 /** |
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296 * Returns the ToolTipHelper used to display tooltips on hover events. |
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297 * @return the ToolTipHelper |
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298 */ |
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299 protected ToolTipHelper getToolTipHelper() { |
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300 if (toolTipHelper is null) |
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301 toolTipHelper = new ToolTipHelper(control); |
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302 return toolTipHelper; |
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303 } |
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304 |
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305 /** |
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306 * Returns the FocusTraverseManager which is used to determine which figure will get focus |
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307 * when a TAB or ALT+TAB key sequence occurs. |
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308 * @return the FocusTraverseManager |
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309 */ |
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310 protected final FocusTraverseManager getFocusTraverseManager() { |
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311 if (focusManager is null) { |
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312 focusManager = new FocusTraverseManager(); |
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313 } |
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314 return focusManager; |
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315 } |
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316 |
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317 /** |
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318 * @see EventDispatcher#getFocusOwner() |
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319 */ |
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320 /*package*/ IFigure getFocusOwner() { |
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321 return focusOwner; |
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322 } |
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323 |
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324 /** |
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325 * Returns the figure that is the target of mouse events. This may not be the figure |
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326 * beneath the cursor because another figure may have captured the mouse and will continue |
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327 * to get mouse events until capture is released. |
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328 * @return the mouse target |
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329 */ |
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330 protected IFigure getMouseTarget() { |
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331 return mouseTarget; |
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332 } |
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333 |
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334 /** |
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335 * Returns the root figure for this dispatcher. |
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336 * @return the root figure |
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337 */ |
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338 protected IFigure getRoot() { |
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339 return root; |
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340 } |
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341 |
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342 /** |
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343 * @see EventDispatcher#isCaptured() |
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344 */ |
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345 public bool isCaptured() { |
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346 return captured; |
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347 } |
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348 |
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349 private void receive(dwt.events.MouseEvent.MouseEvent me) { |
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350 currentEvent = null; |
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351 updateFigureUnderCursor(me); |
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352 int state = me.stateMask; |
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353 if (captured) { |
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354 if (mouseTarget !is null) |
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355 currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget, me.button, state); |
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356 } else { |
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357 IFigure f = root.findMouseEventTargetAt(me.x, me.y); |
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358 if (f is mouseTarget) { |
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359 if (mouseTarget !is null) |
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360 currentEvent = |
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361 new MouseEvent(me.x, me.y, this, mouseTarget, me.button, state); |
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362 return; |
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363 } |
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364 if (mouseTarget !is null) { |
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365 currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget, me.button, state); |
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366 mouseTarget.handleMouseExited(currentEvent); |
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367 } |
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368 setMouseTarget(f); |
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369 if (mouseTarget !is null) { |
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370 currentEvent = new MouseEvent(me.x, me.y, this, mouseTarget, me.button, state); |
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371 mouseTarget.handleMouseEntered(currentEvent); |
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372 } |
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373 } |
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374 } |
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375 |
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376 /** |
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377 * @see EventDispatcher#releaseCapture() |
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378 */ |
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379 protected void releaseCapture() { |
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380 captured = false; |
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381 } |
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382 |
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383 /** |
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384 * @see EventDispatcher#requestFocus(IFigure) |
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385 */ |
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386 public void requestFocus(IFigure fig) { |
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387 setFocus(fig); |
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388 } |
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389 |
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390 /** |
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391 * @see EventDispatcher#requestRemoveFocus(IFigure) |
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392 */ |
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393 public void requestRemoveFocus(IFigure fig) { |
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394 if (getFocusOwner() is fig) |
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395 setFocus(null); |
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396 if (mouseTarget is fig) |
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397 mouseTarget = null; |
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398 if (cursorTarget is fig) |
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399 cursorTarget = null; |
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400 if (hoverSource is fig) |
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401 hoverSource = null; |
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402 getFocusTraverseManager().setCurrentFocusOwner(null); |
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403 } |
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404 |
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405 /** |
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406 * @see EventDispatcher#setCapture(IFigure) |
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407 */ |
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408 protected void setCapture(IFigure figure) { |
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409 captured = true; |
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410 mouseTarget = figure; |
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411 } |
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parents:
diff
changeset
|
412 |
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parents:
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413 /** |
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414 * @see EventDispatcher#setControl(Control) |
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parents:
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|
415 */ |
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416 public void setControl(Control c) { |
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417 if (c is control) |
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418 return; |
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419 if (control !is null && !control.isDisposed()) |
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420 throw new RuntimeException( |
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421 "Can not set control again once it has been set"); //$NON-NLS-1$ |
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parents:
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422 if (c !is null) |
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|
423 c.addDisposeListener(new class() dwt.events.DisposeListener.DisposeListener { |
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|
424 public void widgetDisposed(DisposeEvent e) { |
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425 if (toolTipHelper !is null) |
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426 toolTipHelper.dispose(); |
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|
427 } |
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428 }); |
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429 control = c; |
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430 } |
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parents:
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changeset
|
431 |
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parents:
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432 /** |
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433 * Sets the mouse cursor. |
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434 * @param c the new cursor |
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|
435 */ |
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436 protected void setCursor(Cursor c) { |
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437 if (c is null && cursor is null) { |
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438 return; |
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439 } else if ((c !is cursor) || (!c.opEquals(cursor))) { |
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440 cursor = c; |
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441 if (control !is null && !control.isDisposed()) |
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442 control.setCursor(c); |
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443 } |
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444 } |
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445 |
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446 /** |
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447 * Enables key traversal via TAB and ALT+TAB if <i>traverse</i> is <code>true</code>. |
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448 * Disables it otherwise. |
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449 * @param traverse whether key traversal should be enabled |
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450 */ |
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451 public void setEnableKeyTraversal(bool traverse) { |
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452 figureTraverse = traverse; |
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453 } |
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|
454 |
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parents:
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455 /** |
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456 * Sets the figure under the mouse cursor. |
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457 * @param f the new figure under the cursor |
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458 */ |
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459 protected void setFigureUnderCursor(IFigure f) { |
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460 if (cursorTarget is f) |
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|
461 return; |
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462 cursorTarget = f; |
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463 updateCursor(); |
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464 } |
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|
465 |
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|
466 /** |
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467 * Sets the focus figure. If the figure currently with focus is not <code>null</code>, |
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468 * {@link IFigure#handleFocusLost(FocusEvent)} is called on the current focused figure. If |
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469 * the new focus figure is not <code>null</code>, this will call |
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470 * {@link IFigure#handleFocusGained(FocusEvent)} on the new focused figure. |
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471 * @param fig the new focus figure |
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472 */ |
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473 protected void setFocus(IFigure fig) { |
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474 if (fig is focusOwner) |
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parents:
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|
475 return; |
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476 FocusEvent fe = new FocusEvent(focusOwner, fig); |
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477 IFigure oldOwner = focusOwner; |
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478 focusOwner = fig; |
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479 if (oldOwner !is null) |
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480 oldOwner.handleFocusLost(fe); |
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481 if (fig !is null) |
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482 getFocusTraverseManager().setCurrentFocusOwner(fig); |
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483 if (focusOwner !is null) |
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484 focusOwner.handleFocusGained(fe); |
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485 } |
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|
486 |
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changeset
|
487 /** |
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|
488 * Sets the figure that the mouse cursor is hovering over. |
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489 * @param figure the new hover source |
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490 * @param me the mouse event |
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491 */ |
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492 protected void setHoverSource(Figure figure, dwt.events.MouseEvent.MouseEvent me) { |
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493 hoverSource = figure; |
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494 if (figure !is null) { |
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495 Control control = cast(Control)me.getSource(); |
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496 dwt.graphics.Point.Point absolute; |
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497 absolute = control.toDisplay(new dwt.graphics.Point.Point(me.x, me.y)); |
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498 toolTipHelper = getToolTipHelper(); |
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499 toolTipHelper.updateToolTip( |
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500 hoverSource, getCurrentToolTip(), absolute.x, absolute.y); |
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501 } else if (toolTipHelper !is null) { |
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502 // Update with null to clear hoverSource in ToolTipHelper |
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503 toolTipHelper.updateToolTip(hoverSource, getCurrentToolTip(), me.x, me.y); |
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504 } |
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|
505 } |
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changeset
|
506 |
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|
507 /** |
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508 * Sets the given figure to be the target of future mouse events. |
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509 * @param figure the new mouse target |
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510 */ |
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511 protected void setMouseTarget(IFigure figure) { |
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512 mouseTarget = figure; |
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|
513 } |
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|
514 |
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515 /** |
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516 * @see EventDispatcher#setRoot(IFigure) |
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517 */ |
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518 public void setRoot(IFigure figure) { |
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519 root = figure; |
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520 } |
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|
521 |
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|
522 /** |
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|
523 * @see EventDispatcher#updateCursor() |
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|
524 */ |
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changeset
|
525 protected void updateCursor() { |
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|
526 Cursor newCursor = null; |
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changeset
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527 if (cursorTarget !is null) |
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528 newCursor = cursorTarget.getCursor(); |
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529 setCursor(newCursor); |
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changeset
|
530 } |
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changeset
|
531 |
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parents:
diff
changeset
|
532 /** |
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|
533 * Updates the figure under the cursor, unless the mouse is captured, in which case all |
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534 * mouse events will be routed to the figure that captured the mouse. |
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|
535 * @param me the mouse event |
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changeset
|
536 */ |
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|
537 protected void updateFigureUnderCursor(dwt.events.MouseEvent.MouseEvent me) { |
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parents:
diff
changeset
|
538 if (!captured) { |
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changeset
|
539 IFigure f = root.findFigureAt(me.x, me.y); |
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changeset
|
540 setFigureUnderCursor(f); |
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changeset
|
541 if (cast(Figure)cursorTarget !is hoverSource) |
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parents:
diff
changeset
|
542 updateHoverSource(me); |
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parents:
diff
changeset
|
543 } |
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parents:
diff
changeset
|
544 } |
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parents:
diff
changeset
|
545 |
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parents:
diff
changeset
|
546 /** |
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parents:
diff
changeset
|
547 * Updates the figure that will receive hover events. The hover source must have a |
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parents:
diff
changeset
|
548 * tooltip. If the figure under the mouse doesn't have a tooltip set, this method will |
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parents:
diff
changeset
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549 * walk up the ancestor hierarchy until either a figure with a tooltip is found or it |
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550 * gets to the root figure. |
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551 * @param me the mouse event |
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552 */ |
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553 protected void updateHoverSource(dwt.events.MouseEvent.MouseEvent me) { |
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554 /* |
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555 * Derive source from figure under cursor. |
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556 * Set the source in setHoverSource(); |
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557 * If figure.getToolTip() is null, get parent's toolTip |
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558 * Continue parent traversal until a toolTip is found or root is reached. |
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559 */ |
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560 if (cursorTarget !is null) { |
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561 bool sourceFound = false; |
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562 Figure source = cast(Figure)cursorTarget; |
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563 while (!sourceFound && source.getParent() !is null) { |
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564 if (source.getToolTip() !is null) |
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565 sourceFound = true; |
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566 else |
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567 source = cast(Figure)source.getParent(); |
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568 } |
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569 setHoverSource(source, me); |
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570 } else { |
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571 setHoverSource(null, me); |
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572 } |
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573 } |
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574 |
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575 } |