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annotate ext/guichan-0.8.1/include/guichan/focushandler.hpp @ 164:5b04a7d3ded6

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typo fix some missing event (de)registrations ability to capture one event multiple times (instead of only having one slot, we have groups and each group has an own slot, the default group is "default" so we are backward compatible
author spq@33b003aa-7bff-0310-803a-e67f0ece8222
date Wed, 15 Oct 2008 14:57:04 +0000
parents 4a0efb7baf70
children
rev   line source
0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /* _______ __ __ __ ______ __ __ _______ __ __
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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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13 * Olof Naessén a.k.a jansem/yakslem
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14 *
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15 * Visit: http://guichan.sourceforge.net
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16 *
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17 * License: (BSD)
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18 * Redistribution and use in source and binary forms, with or without
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19 * modification, are permitted provided that the following conditions
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20 * are met:
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21 * 1. Redistributions of source code must retain the above copyright
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22 * notice, this list of conditions and the following disclaimer.
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23 * 2. Redistributions in binary form must reproduce the above copyright
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24 * notice, this list of conditions and the following disclaimer in
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25 * the documentation and/or other materials provided with the
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26 * distribution.
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27 * 3. Neither the name of Guichan nor the names of its contributors may
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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
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32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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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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221 * @see tabPrevious
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222 */
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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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226 * Focuses the previous widget which allows tabbing in unless
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227 * current focused widget disallows tabbing out.
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228 *
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229 * @see tabNext
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230 */
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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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234 * Gets the widget being dragged. Used by the Gui class to
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diff changeset
235 * keep track of the dragged widget.
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236 *
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237 * @return the widget being dragged.
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238 * @see setDraggedWidget
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239 */
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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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243 * Sets the widget being dragged. Used by the Gui class to
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
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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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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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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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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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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257 */
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258 virtual Widget* getLastWidgetWithMouse();
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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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diff changeset
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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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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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 /**
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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270 * Gets the last widget with modal focus.
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271 *
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272 * @return The last widget with modal focus.
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273 * @see setLastWidgetWithModalFocus
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274 */
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275 virtual Widget* getLastWidgetWithModalFocus();
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276
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277 /**
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278 * Sets the last widget with modal focus.
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279 *
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280 * @param lastWidgetWithModalFocus The last widget with modal focus.
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281 * @see getLastWidgetWithModalFocus
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282 */
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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 /**
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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286 * Gets the last widget with modal mouse input focus.
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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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289 * @see setLastWidgetWithModalMouseInputFocus
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290 */
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291 virtual Widget* getLastWidgetWithModalMouseInputFocus();
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292
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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293 /**
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294 * Sets the last widget with modal mouse input focus.
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295 *
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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296 * @param lastMouseWithModalMouseInputFocus The last widget with
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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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299 */
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diff changeset
300 virtual void setLastWidgetWithModalMouseInputFocus(Widget* lastWidgetWithModalMouseInputFocus);
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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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diff changeset
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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diff changeset
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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diff changeset
307 * @see setLastWidgetPressed
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
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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310
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
311 /**
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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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diff changeset
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.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
316 * @see getLastWidgetPressed
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
317 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
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:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
321 /**
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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322 * Distributes a focus lost event.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
323 *
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
324 * @param focusEvent the event to distribute.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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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diff changeset
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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diff changeset
328
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
329 /**
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
330 * Distributes a focus gained event.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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.
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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