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annotate ext/guichan-0.8.1/include/guichan/focushandler.hpp @ 0:4a0efb7baf70

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* Datasets becomes the new trunk and retires after that :-)
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 29 Jun 2008 18:44:17 +0000
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4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /* _______ __ __ __ ______ __ __ _______ __ __
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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2 * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
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3 * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
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4 * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
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5 * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
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6 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
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7 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
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8 *
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9 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
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10 *
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11 *
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12 * Per Larsson a.k.a finalman
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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13 * Olof Naessén a.k.a jansem/yakslem
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14 *
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15 * Visit: http://guichan.sourceforge.net
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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16 *
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17 * License: (BSD)
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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18 * Redistribution and use in source and binary forms, with or without
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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19 * modification, are permitted provided that the following conditions
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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20 * are met:
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21 * 1. Redistributions of source code must retain the above copyright
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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22 * notice, this list of conditions and the following disclaimer.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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23 * 2. Redistributions in binary form must reproduce the above copyright
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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24 * notice, this list of conditions and the following disclaimer in
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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25 * the documentation and/or other materials provided with the
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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26 * distribution.
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27 * 3. Neither the name of Guichan nor the names of its contributors may
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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28 * be used to endorse or promote products derived from this software
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29 * without specific prior written permission.
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30 *
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31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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37 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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38 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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39 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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40 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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42 */
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43
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44 #ifndef GCN_FOCUSHANDLER_HPP
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45 #define GCN_FOCUSHANDLER_HPP
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46
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47 #include <vector>
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48
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49 #include "guichan/event.hpp"
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50 #include "guichan/platform.hpp"
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51
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52 namespace gcn
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53 {
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54 class Widget;
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55
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56 /**
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57 * Handles focus for widgets in a Gui. Each Gui has at least one
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58 * focus handler.
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59
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60 * You will probably not use the focus handler directly as Widget
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61 * has functions that automatically uses the active focus handler.
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62 *
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63 * @see Widget::isFocus, Widget::isModalFocused,
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64 * Widget::isModalMouseInputFocused, Widget::requestFocus,
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65 * Widget::requestModalFocus, Widget::requestModalMouseInputFocus,
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66 * Widget::releaseModalFocus, Widget::relaseModalMouseInputFocus,
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67 * Widget::setFocusable, Widget::isFocusable, FocusListener
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68 *
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69 * @since 0.1.0
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70 */
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71 class GCN_CORE_DECLSPEC FocusHandler
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72 {
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73 public:
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74
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75 /**
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76 * Constructor.
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77 */
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78 FocusHandler();
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79
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80 /**
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81 * Destructor.
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82 */
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83 virtual ~FocusHandler() { };
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84
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85 /**
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86 * Requests focus for a widget. Focus will only be granted to a widget
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87 * if it's focusable and if no other widget has modal focus.
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88 * If a widget receives focus a focus event will be sent to the
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89 * focus listeners of the widget.
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90 *
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91 * @param widget The widget to request focus for.
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92 * @see isFocused, Widget::requestFocus
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93 */
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94 virtual void requestFocus(Widget* widget);
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95
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96 /**
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97 * Requests modal focus for a widget. Focus will only be granted
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98 * to a widget if it's focusable and if no other widget has modal
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99 * focus.
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100 *
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101 * @param widget The widget to request modal focus for.
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102 * @throws Exception when another widget already has modal focus.
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103 * @see releaseModalFocus, Widget::requestModalFocus
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104 */
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105 virtual void requestModalFocus(Widget* widget);
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106
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107 /**
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108 * Requests modal mouse input focus for a widget. Focus will only
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109 * be granted to a widget if it's focusable and if no other widget
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110 * has modal mouse input focus.
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111 *
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112 * Modal mouse input focus means no other widget then the widget with
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113 * modal mouse input focus will receive mouse input. The widget with
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114 * modal mouse input focus will also receive mouse input no matter what
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115 * the mouse input is or where the mouse input occurs.
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116 *
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117 * @param widget The widget to focus for modal mouse input focus.
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118 * @throws Exception when another widget already has modal mouse input
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119 * focus.
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120 * @see releaseModalMouseInputFocus, Widget::requestModalMouseInputFocus
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121 */
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122 virtual void requestModalMouseInputFocus(Widget* widget);
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123
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124 /**
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125 * Releases modal focus if the widget has modal focus.
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126 * If the widget doesn't have modal focus no relase will occur.
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127 *
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128 * @param widget The widget to release modal focus for.
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129 * @see reuqestModalFocus, Widget::releaseModalFocus
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130 */
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131 virtual void releaseModalFocus(Widget* widget);
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132
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133 /**
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134 * Releases modal mouse input focus if the widget has modal mouse input
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135 * focus. If the widget doesn't have modal mouse input focus no relase
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136 * will occur.
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137 *
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138 * @param widget the widget to release modal mouse input focus for.
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139 * @see requestModalMouseInputFocus, Widget::releaseModalMouseInputFocus
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140 */
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141 virtual void releaseModalMouseInputFocus(Widget* widget);
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142
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143 /**
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144 * Checks if a widget is focused.
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145 *
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146 * @param widget The widget to check.
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147 * @return True if the widget is focused, false otherwise.
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148 * @see Widget::isFocused
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149 */
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150 virtual bool isFocused(const Widget* widget) const;
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151
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152 /**
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153 * Gets the widget with focus.
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154 *
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155 * @return The widget with focus. NULL if no widget has focus.
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156 */
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157 virtual Widget* getFocused() const;
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158
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159 /**
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160 * Gets the widget with modal focus.
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161 *
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162 * @return The widget with modal focus. NULL if no widget has
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163 * modal focus.
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164 */
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165 virtual Widget* getModalFocused() const;
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166
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167 /**
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168 * Gets the widget with modal mouse input focus.
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169 *
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170 * @return The widget with modal mouse input focus. NULL if
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171 * no widget has modal mouse input focus.
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172 */
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173 virtual Widget* getModalMouseInputFocused() const;
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174
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175 /**
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176 * Focuses the next widget added to a conainer.
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177 * If no widget has focus the first widget gets focus. The order
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178 * in which the widgets are focused is determined by the order
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179 * they were added to a container.
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180 *
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181 * @see focusPrevious
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182 */
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183 virtual void focusNext();
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184
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185 /**
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186 * Focuses the previous widget added to a contaienr.
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187 * If no widget has focus the first widget gets focus. The order
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188 * in which the widgets are focused is determined by the order
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189 * they were added to a container.
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190 *
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191 * @see focusNext
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192 */
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193 virtual void focusPrevious();
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194
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195 /**
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196 * Adds a widget to by handles by the focus handler.
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197 *
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198 * @param widget The widget to add.
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199 * @see remove
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200 */
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201 virtual void add(Widget* widget);
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202
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203 /**
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204 * Removes a widget from the focus handler.
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205 *
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206 * @param widget The widget to remove.
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207 * @see add
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208 */
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209 virtual void remove(Widget* widget);
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210
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211 /**
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212 * Focuses nothing. A focus event will also be sent to the
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213 * focused widget's focus listeners if a widget has focus.
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214 */
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215 virtual void focusNone();
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216
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217 /**
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218 * Focuses the next widget which allows tabbing in unless
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219 * the current focused Widget disallows tabbing out.
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220 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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221 * @see tabPrevious
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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222 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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223 virtual void tabNext();
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224
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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225 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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226 * Focuses the previous widget which allows tabbing in unless
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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227 * current focused widget disallows tabbing out.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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228 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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229 * @see tabNext
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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230 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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231 virtual void tabPrevious();
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232
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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233 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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234 * Gets the widget being dragged. Used by the Gui class to
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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235 * keep track of the dragged widget.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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236 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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237 * @return the widget being dragged.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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238 * @see setDraggedWidget
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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239 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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240 virtual Widget* getDraggedWidget();
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241
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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242 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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243 * Sets the widget being dragged. Used by the Gui class to
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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244 * keep track of the dragged widget.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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245 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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246 * @param draggedWidget The widget being dragged.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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247 * @see getDraggedWidget
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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248 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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249 virtual void setDraggedWidget(Widget* draggedWidget);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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250
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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251 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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252 * Gets the last widget with the mouse. Used by the Gui class
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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253 * to keep track the last widget with the mouse.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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254 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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255 * @return The last widget with the mouse.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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256 * @see setLastWidgetWithMouse
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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257 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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258 virtual Widget* getLastWidgetWithMouse();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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259
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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260 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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261 * Sets the last widget with the mouse. Used by the Gui class
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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262 * to keep track the last widget with the mouse.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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263 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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264 * @param lastWidgetWithMouse The last widget with the mouse.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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265 * @see getLastWidgetWithMouse
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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266 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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267 virtual void setLastWidgetWithMouse(Widget* lastWidgetWithMouse);
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268
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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269 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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270 * Gets the last widget with modal focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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271 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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272 * @return The last widget with modal focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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273 * @see setLastWidgetWithModalFocus
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274 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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275 virtual Widget* getLastWidgetWithModalFocus();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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276
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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277 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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278 * Sets the last widget with modal focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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279 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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280 * @param lastWidgetWithModalFocus The last widget with modal focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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281 * @see getLastWidgetWithModalFocus
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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282 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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283 virtual void setLastWidgetWithModalFocus(Widget* lastWidgetWithModalFocus);
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284
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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285 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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286 * Gets the last widget with modal mouse input focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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287 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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288 * @return The last widget with modal mouse input focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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289 * @see setLastWidgetWithModalMouseInputFocus
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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290 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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291 virtual Widget* getLastWidgetWithModalMouseInputFocus();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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292
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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293 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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294 * Sets the last widget with modal mouse input focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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295 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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296 * @param lastMouseWithModalMouseInputFocus The last widget with
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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297 * modal mouse input focus.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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298 * @see getLastWidgetWithModalMouseInputFocus
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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299 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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300 virtual void setLastWidgetWithModalMouseInputFocus(Widget* lastWidgetWithModalMouseInputFocus);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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301
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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302 /**
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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303 * Gets the last widget pressed. Used by the Gui class to keep track
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
304 * of pressed widgets.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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305 *
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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306 * @return The last widget pressed.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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307 * @see setLastWidgetPressed
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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308 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
309 virtual Widget* getLastWidgetPressed();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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310
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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311 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
312 * Sets the last widget pressed. Used by the Gui class to keep track
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
313 * of pressed widgets.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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314 *
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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315 * @param lastWidgetPressed The last widget pressed.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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316 * @see getLastWidgetPressed
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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317 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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318 virtual void setLastWidgetPressed(Widget* lastWidgetPressed);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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319
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
320 protected:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
321 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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322 * Distributes a focus lost event.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
323 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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324 * @param focusEvent the event to distribute.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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325 * @since 0.7.0
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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326 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
327 virtual void distributeFocusLostEvent(const Event& focusEvent);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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328
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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329 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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330 * Distributes a focus gained event.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
331 *
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
332 * @param focusEvent the event to distribute.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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333 * @since 0.7.0
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334 */
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335 virtual void distributeFocusGainedEvent(const Event& focusEvent);
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336
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337 /**
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338 * Typedef.
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339 */
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340 typedef std::vector<Widget*> WidgetVector;
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341
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342 /**
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343 * Typedef.
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344 */
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345 typedef WidgetVector::iterator WidgetIterator;
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346
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347 /**
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348 * Holds the widgets currently being handled by the
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349 * focus handler.
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350 */
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351 WidgetVector mWidgets;
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352
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353 /**
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354 * Holds the focused widget. NULL if no widget has focus.
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355 */
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356 Widget* mFocusedWidget;
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357
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358 /**
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359 * Holds the modal focused widget. NULL if no widget has
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360 * modal focused.
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361 */
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362 Widget* mModalFocusedWidget;
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363
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364 /**
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365 * Holds the modal mouse input focused widget. NULL if no widget
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366 * is being dragged.
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367 */
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368 Widget* mModalMouseInputFocusedWidget;
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369
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370 /**
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371 * Holds the dragged widget. NULL if no widget is
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372 * being dragged.
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373 */
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374 Widget* mDraggedWidget;
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375
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376 /**
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377 * Holds the last widget with the mouse.
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378 */
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379 Widget* mLastWidgetWithMouse;
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380
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381 /**
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382 * Holds the last widget with modal focus.
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383 */
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384 Widget* mLastWidgetWithModalFocus;
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385
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386 /**
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387 * Holds the last widget with modal mouse input focus.
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388 */
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389 Widget* mLastWidgetWithModalMouseInputFocus;
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390
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391 /**
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392 * Holds the last widget pressed.
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393 */
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394 Widget* mLastWidgetPressed;
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395 };
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396 }
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397
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398 #endif // end GCN_FOCUSHANDLER_HPP