Mercurial > projects > mde
annotate mde/gui/widget/Ifaces.d @ 131:9cff74f68b84
Major revisions to popup handling. Buttons can close menus now, plus some smaller impovements. Removed Widget module.
Moved Widget.AWidget to AChildWidget.AChildWidget and Widget.AParentWidget to AParentWidget.AParentWidget.
Removed ASingleParentWidget to improve code sharing.
AChildWidget doesn't implement IParentWidget like AWidget did.
New IPopupParentWidget extending IParentWidget for the WM and some widgets to handle popups.
Cut old popup management code.
New underMouse() function replacing highlight(); called on all widgets.
Separate menu-popup and button widgets aren't needed for menus now.
Functions returning content widgets have been moved to their own module.
Cleaned up jobs.txt.
Switched to 80 line length for Ddoc.
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Wed, 21 Jan 2009 13:01:40 +0000 |
parents | c5c38eaadb64 |
children | 9fd705793568 |
rev | line source |
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1 /* LICENSE BLOCK |
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2 Part of mde: a Modular D game-oriented Engine |
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3 Copyright © 2007-2008 Diggory Hardy |
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4 |
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5 This program is free software: you can redistribute it and/or modify it under the terms |
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6 of the GNU General Public License as published by the Free Software Foundation, either |
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7 version 2 of the License, or (at your option) any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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11 See the GNU General Public License for more details. |
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12 |
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13 You should have received a copy of the GNU General Public License |
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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15 |
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16 /****************************************************************************** |
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17 * Widget interfaces. |
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18 * |
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19 * This module contains the primary documentation for the declared methods; |
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20 * also the Widget module has some brief comments and basic implementations. |
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21 * |
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22 * Widgets are connected as the nodes of a tree. Widgets know their parent as a |
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23 * IParentWidget class and their children as IChildWidget classes. The gui |
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24 * manager is a special widget only implementing IParentWidget; all other |
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25 * widgets must implement IChildWidget and optionally IParentWidget. |
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26 * |
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27 * It's recommended that widgets inherit one of the A*Widget classes rather |
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28 * than impement I*Widget directly. |
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29 *****************************************************************************/ |
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30 module mde.gui.widget.Ifaces; |
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31 |
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32 public import mde.gui.types; |
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33 public import mde.gui.renderer.IRenderer; |
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34 import mde.content.Content; |
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35 |
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36 |
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37 /****************************************************************************** |
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38 * Interface for parent widgets, including IWidgetManager. |
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39 * |
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40 * All widgets implement this via AWidget to make things simpler (code sharing). |
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41 * |
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42 * Notation: |
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43 * Positive/negative direction: along the x/y axis in this direction. |
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44 * Layout widget: a widget containing multiple sub-widges (which hence |
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45 * controls how they are laid out). |
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46 *****************************************************************************/ |
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47 interface IParentWidget |
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48 { |
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49 /** Checks for recursion of unsafe widgets to prevent infinite recursion. */ |
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50 void recursionCheck (widgetID); |
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51 |
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52 /** IPPWs return self, other widgets recurse call on parent. */ |
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53 IPopupParentWidget getParentIPPW (); |
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54 |
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55 /** Child widgets should call this on their parent if their minimal size changes, since they |
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56 * cannot resize themselves. |
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57 * |
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58 * Children may depend on their parent resizing them if necessary to keep width valid. |
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59 * Widgets may also depend on setPosition being called afterwards. |
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60 * |
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61 * Params: |
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62 * widget = The child widget calling the function |
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63 * mw = New minimal width |
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64 * mh = New minimal height */ |
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65 void minWChange (IChildWidget widget, wdim mw); |
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66 void minHChange (IChildWidget widget, wdim mh); /// ditto |
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67 |
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68 /** Governor of parent widget resizability, where this is determined by sub-widgets |
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69 * (e.g. this doesn't apply to FloatingAreaWidget). |
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70 * |
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71 * NEVER and ALWAYS often don't result in usable GUIs, and aren't expected to be used except |
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72 * for debugging. |
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73 * |
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74 * Note: ANY_SUBWIDGETS can cause problems like enlarging a menu bar containing a resizable |
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75 * blank instead of the main part of a window. */ |
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76 enum SIZABILITY_ENUM { |
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77 NEVER = 0, /// Parents are never resizable |
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78 ALL_SUBWIDGETS = 3, /// Parents are only resizable if all sub-widgets are |
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79 ANY_SUBWIDGETS = 2, /// Parents are resizable if any sub-widgets are |
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80 ALWAYS = 1, /// Parents are always resizable |
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81 START_TRUE = 1, /// Flag set by ALWAYS and ALL_SUBWIDGETS |
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82 SUBWIDGETS = 2, /// Flag set by ALL_SUBWIDGETS and ANY_SUBWIDGETS |
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83 } |
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84 static const SIZABILITY = SIZABILITY_ENUM.ALL_SUBWIDGETS; /// ditto |
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85 } |
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86 |
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87 /****************************************************************************** |
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88 * Interface for parents of popups and the widget manager. |
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89 * |
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90 * An IPopupParentWidget (IPPW) may have 0 or 1 child IPPWs; the child may have |
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91 * its own IPPW. Each IPPW when added to a parent IPPW is responsible for |
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92 * managing one popup. |
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93 * |
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94 * So any child IPPW should also be a descendant widget, and is usually the or |
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95 * a descendant of the popup. |
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96 * |
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97 * An IPPW usually has one popup to manage (the popup being one of its child |
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98 * widgets), but the popup is only active if the IPPW is added as a child of |
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99 * its parent IPPW. |
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100 * |
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101 * The widget manager is an IPPW, but unlike most IPPWs its popup(s), if |
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102 * existing, probably have nothing to do with its child IPPWs. |
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103 *****************************************************************************/ |
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104 interface IPopupParentWidget : IParentWidget |
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105 { |
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106 /** Add caller ippw as current child IPopupParentWidget of called IPPW. |
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107 * |
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108 * ippw is added as called IPPW's child IPPW, and its functions are |
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109 * called to draw popup and pass events. The called IPPW's previous child |
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110 * IPPW is replaced. |
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111 * |
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112 * ippw is then responsible for managing a popup. */ |
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113 void addChildIPPW (IPopupParentWidget ippw); |
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114 /** Remove ippw from being the called IPPW's child IPPW and disable |
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115 * menuActive. |
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116 * |
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117 * Do nothing if ippw is not the called IPPW's child IPPW. |
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118 * |
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119 * Returns: true if ippw was the child IPPW. |
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120 * |
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121 * I.e. this deactivates ippw's popup. */ |
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122 bool removeChildIPPW (IPopupParentWidget ippw); |
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123 |
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124 /** Notify the called IPPW that it has been removed. */ |
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125 void removedIPPW (); |
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126 |
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127 /** Set/get menuActive state. |
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128 * |
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129 * This is set on the parent IPPW when a popup menu is opened and unset |
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130 * when the menu is closed. |
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131 * If set on the parent IPPW, popup menus can be opened with just a mouse- |
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132 * over and buttons activated with an up-click. */ |
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133 void menuActive (bool); |
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134 bool menuActive (); |
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135 |
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136 /** Called by descendant widgets such as buttons when an action occurred, |
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137 * which should close a menu. (But also called when not in a menu.) */ |
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138 void menuDone (); |
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139 |
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140 /** Get the widget under cx,cy. |
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141 * |
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142 * The IPPW should first recurse the call to its child IPPW if it exists. |
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143 * If this doesn't yield a widget, it should try getting one from its popup |
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144 * and then itself. It should return the first widget found or null. |
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145 * |
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146 * If closePopup is true and a widget isn't returned from the childIPPW, |
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147 * the childIPPW should be removed (to close popups when a click is not on |
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148 * the popup or its parent) and menuActive set false. */ |
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149 IChildWidget getPopupWidget (wdabs cx, wdabs cy, bool closePopup); |
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150 |
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151 /** Draw. |
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152 * |
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153 * The IPPW should first draw its popup, then call on its child IPPW if |
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154 * that exists. */ |
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155 void drawPopup (); |
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156 |
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157 /// Returns true if ippw is child IPPW. |
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158 debug bool isChild (IPopupParentWidget ippw); |
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159 } |
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160 |
131
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161 /****************************************************************************** |
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162 * Interface for the widget manager. |
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163 * |
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164 * This class handles widget rendering, input, loading and saving. |
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165 *****************************************************************************/ |
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166 interface IWidgetManager : IPopupParentWidget |
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167 { |
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168 // Loading/saving: |
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169 /** Create a widget by looking up the data for id then looking up data.ints[0] in WIDGET_TYPES. |
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170 * |
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171 * Params: |
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172 * id = Identifier, within data files, of the data for the widget. |
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173 * data = Pass this data to the widget, not data looked up via id. |
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174 * content = An IContent may be passed to some widgets on creation. |
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175 * |
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176 * When used in a this(), super() should be called before any calls to makeWidget (or at least |
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177 * parent and id set) due to recursionCheck being called on the widget. |
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178 * |
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179 * Creates a widget, using the widget data with index id. Widget data is loaded from files, |
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180 * and per design (multiple gui layouts, called designs, may exist; data is per design). */ |
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181 IChildWidget makeWidget (IParentWidget parent, widgetID id, IContent content = null); |
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182 |
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183 /** Get or set widget id's WidgetData or dimension data. |
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184 * |
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185 * WidgetData is for most data, dimensional data (wdims) is for dimensions. |
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186 * |
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187 * Data should only be set from IChildWidget.saveChanges() to |
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188 * avoid setting multiple times when a widget id has several instances. */ |
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189 WidgetData widgetData (widgetID id); |
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190 void widgetData (widgetID id, WidgetData data); /// ditto |
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191 wdims dimData (widgetID id); /// ditto |
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192 void dimData (widgetID id, wdims d); /// ditto |
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193 |
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194 /** Position popup left or right of parent, or left or right of parent |
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195 * (flags & 1 == 1). */ |
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196 void positionPopup (IChildWidget parent, IChildWidget popup, int flags = 0); |
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197 |
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198 // Rendering: |
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199 /** For when a widget needs redrawing. |
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200 * |
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201 * Must be called because rendering may only be done on events. |
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202 * |
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203 * Currently it just causes everything to be redrawn next frame. */ |
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204 void requestRedraw (); |
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205 |
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206 /** Get the window's renderer. |
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207 * |
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208 * Normally specific to the GUI, but widgets have no direct contact with the GUI and this |
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209 * provides the possibility of per-window renderers (if desired). */ |
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210 IRenderer renderer (); |
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211 |
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212 // User input: |
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213 /** Add a mouse click callback. |
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214 * |
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215 * This is a delegate this will be called for all mouse click events recieved by the gui, not |
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216 * simply all click events on the widget (as clickEvent recieves). |
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217 * |
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218 * The delegate should return true if it accepts the event and no further processing is |
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219 * required (i.e. the event should not be handled by anything else), false otherwise. */ |
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220 void addClickCallback (bool delegate (wdabs cx, wdabs cy, ubyte b, bool state) dg); |
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221 |
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222 /** Add a mouse motion callback: delegate will be called for all motion events recieved by the |
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223 * gui. */ |
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224 void addMotionCallback (void delegate (wdabs cx, wdabs cy) dg); |
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225 |
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226 /** Remove all event callbacks on this widget (according to the delegate's .ptr). */ |
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227 // Note: don't try to pass a reference and cast to void* in the function; it's a different address. |
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228 void removeCallbacks (void* frame); |
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229 } |
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230 |
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231 |
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232 /****************************************************************************** |
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233 * Interface for (child) widgets, i.e. all widgets other than the manager. |
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234 * |
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235 * A widget is a region of a GUI window which handles rendering and user-interaction for itself |
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236 * and is able to communicate with its manager and child widgets as necessary. (Passing widgets |
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237 * a reference to their parent has not been found useful.) |
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238 * |
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239 * If a widget is to be creatable by IWidgetManager.makeWidget, it must be listed in the |
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240 * createWidget module, and have a constructor of the following form. It should also update it's |
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241 * creation data if necessary, either when changed or when saveChanges() is called, using |
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242 * IWidgetManager.setData(). |
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243 * It should use Ddoc to explain what initialization data is used. |
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244 * ---------------------------------- |
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245 * /++ Constructor for a ... widget. |
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246 * + |
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247 * + Widget uses the initialisation data: |
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248 * + [widgetID, x, y] |
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249 * + where x is ... and y is ... +/ |
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250 * this (IWidgetManager mgr, widgetID id, WidgetData data); |
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251 * |
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252 * /// The CTOR may take an IContent reference: |
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253 * this (IWidgetManager mgr, widgetID id, WidgetData data, IContent content); |
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254 * ---------------------------------- |
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255 * Where mgr is the widget manager, id is the _id passed to makeWidget() and data is |
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256 * initialisation data. The method should throw a WidgetDataException (created without |
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257 * parameters) if the data has wrong length or is otherwise invalid. |
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258 * |
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259 * All widgets should set their own size in this() or setup() (must be setup() if it could change), |
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260 * although some parents may set child-widgets' size during their creation. |
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261 *****************************************************************************/ |
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262 //NOTE: add another this() without the data for default initialization, for the GUI editor? |
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263 interface IChildWidget |
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264 { |
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265 //BEGIN Load and save |
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266 /** 2nd stage of initialization for widgets; also called on some changes. |
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267 * |
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268 * Widgets should call recursively on their children, redo anything indicated by flags, and |
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269 * adjust their size and other cached data dependant on any thing which may have changed. |
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270 * Widgets may rely on setPosition being called afterwards. |
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271 * |
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272 * Params: |
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273 * n = Indicates this is the (n+1)-th time the function has been called. |
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274 * flags = if (flags & 1) the renderer has been changed, |
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275 * if (flags & 2) translation strings are being reloaded. |
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276 * These flags are always true on first run. |
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277 * |
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278 * Returns: |
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279 * The method should return true if the dimensions (may) have been changed. This may not be |
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280 * the case on the first run (when n == 0)!. |
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281 */ |
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282 bool setup (uint n, uint flags); |
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283 |
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284 /** When this is called, if the widget has any changed data to save it should call |
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285 * IWidgetManager.setData (id, data) to set it and return true. Otherwise it should return |
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286 * false. |
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287 * |
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288 * If the widget has subwidgets, it should also be recursively called on these (passing their |
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289 * ids). */ |
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290 bool saveChanges (); |
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291 |
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292 /+ Use when widget editing is available? Requires widgets to know their parents. |
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293 /** Called when a child widget's size has changed. |
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294 * |
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295 * Should be propegated up to parents. */ |
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296 void childChanged (); |
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297 +/ |
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298 |
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299 //END Load and save |
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300 |
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301 //BEGIN Size and position |
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302 /** Is the width / height resizable? |
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303 * |
130
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304 * Normally, this means does the widget benifit from being enlarged? If not, the widget has |
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305 * "fixed" dimensions equal to it's minimal size; however it $(I may) still be enlarged. |
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306 * |
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307 * Parents normally take their resizability from sub-widgets; see SIZABILITY for how they do |
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308 * this. */ |
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309 bool isWSizable (); |
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310 bool isHSizable (); /// ditto |
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311 |
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312 /** The minimal size the widget could be shrunk to (or its fixed size). |
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313 * |
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314 * Takes into account child-widgets and any other contents. */ |
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315 wdim minWidth (); |
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316 wdim minHeight (); /// ditto |
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317 |
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318 /** Get the current size of the widget. */ |
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319 wdim width (); |
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320 wdim height(); /// ditto |
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321 |
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322 /** (Smallest) coordinates of widget. */ |
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323 wdabs xPos (); |
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324 wdabs yPos (); /// ditto |
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325 |
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326 /** Used to adjust the size. |
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327 * |
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328 * Params: |
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329 * nw/nh = The new width/height |
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330 * dir = Direction to resize from. This is only really applicable to layout widgets. |
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331 * It must be either -1 (start resizing from highest row/col index, decreasing the |
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332 * index as necessary), or +1 (resize from the lowest index, i.e. 0). |
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333 * Most widgets can simply ignore it. |
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334 * |
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335 * A widget should never be resized smaller than it's minimal size (if it is, it should assume |
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336 * it's minimal size and print a warning when in debug mode). |
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337 * A "fixed" size widget should enlarge itself as requested. |
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338 * |
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339 * setPosition must be called after calling either setWidth or setHeight. */ |
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340 void setWidth (wdim nw, int dir); |
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341 void setHeight (wdim nh, int dir); /// ditto |
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342 |
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343 /** Set the current position (called after setup and to move widget). */ |
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344 void setPosition (wdim x, wdim y); |
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345 //END Size and position |
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346 |
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347 //BEGIN Events |
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348 /** Recursively scan the widget tree to find the widget under (cx,cy). |
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349 * |
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350 * If called on a widget, that widget should assume the location is over itself, and so should |
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351 * either return itself or the result of calling getWidget on the appropriate child widget. |
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352 * |
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353 * In the case of Window this may not be the case; it should check and return null if not under |
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354 * (cx,cy). |
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355 * |
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356 * Note: use global coordinates (cx,cy) not coordinates relative to the widget. */ |
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357 IChildWidget getWidget (wdabs cx, wdabs cy); |
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358 |
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359 /** Return true if (cx,cy) is on self's box (doesn't matter if actually on a subwidget). */ |
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360 bool onSelf (wdabs cx, wdabs cy); |
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361 |
99
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362 /** Receive a mouse click event at cx,cy from button b (1-5 correspond to L,M,B, wheel up,down) |
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363 * which is a down-click if state is true. |
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364 * |
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365 * Widget may assume coordinates are on the widget (caller must check). |
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366 * |
99
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367 * The return value has the following flags: 1 to request keyboard input. */ |
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368 int clickEvent (wdabs cx, wdabs cy, ubyte b, bool state); |
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369 |
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370 /** Receives keyboard events when requested. |
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371 * |
99
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372 * Params: |
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373 * sym SDLKey key sym, useful for keys with no character code such as arrow keys |
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374 * letter The character input, in UTF-8 */ |
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375 void keyEvent (ushort sym, char[] letter); |
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376 |
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377 /** Called when keyboard input focus is lost. */ |
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378 void keyFocusLost (); |
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379 |
131
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380 /** Called on all widgets when the mouse moves over it (state == true) and |
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381 * when it leaves (state == false). */ |
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382 void underMouse (bool state); |
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383 |
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384 /** When a pop-up is closed the manager calls requestRedraw and this function on its parent. */ |
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385 void popupClose (); |
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386 /** When a click is on the parent of a popup, this function is called instead of the usual |
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387 * clickEvent. |
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388 * |
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389 * Returns: |
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390 * true to close the popup. |
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391 * |
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392 * Note: this means the parent can't receive text input without code changes. */ |
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393 bool popupParentClick (); |
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394 |
39
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395 //END Events |
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396 |
34
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parents:
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397 /** Draw, using the stored values of x and y. |
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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changeset
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398 * |
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Work on the Gui: some of the framework for drag & drop. Also made Window an IWidget.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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399 * Maybe later enforce clipping of all sub-widget drawing, particularly for cases where only |
6b4116e6355c
Work on the Gui: some of the framework for drag & drop. Also made Window an IWidget.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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changeset
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400 * part of the widget is visible: scroll bars or a hidden window. */ |
6b4116e6355c
Work on the Gui: some of the framework for drag & drop. Also made Window an IWidget.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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changeset
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401 void draw (); |
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Added a widget size printing debug function. Fixed a bug in SwitchWidget.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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402 |
ad91de8867a0
Added a widget size printing debug function. Fixed a bug in SwitchWidget.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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403 /// Logs the current and minimal size of every widget. |
ad91de8867a0
Added a widget size printing debug function. Fixed a bug in SwitchWidget.
Diggory Hardy <diggory.hardy@gmail.com>
parents:
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404 debug void logWidgetSize (); |
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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changeset
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405 } |