Mercurial > projects > mde
annotate mde/gui/widget/Ifaces.d @ 130:c5c38eaadb64
Changed how sizability is set for parents: can require all sub-widgets resizable or only one to set parent resizable.
Ifaces.IParentWidget.SIZABILITY controlling parent sizability.
TextWidget no longer vertically resizable (since multi-line editing is not supported).
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Sat, 17 Jan 2009 16:11:26 +0000 |
parents | ad91de8867a0 |
children | 9cff74f68b84 |
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. |
130
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18 * |
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19 * This module contains the primary documentation for the declared methods; also the Widget module |
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20 * 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 IParentWidget |
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23 * class and their children as IChildWidget classes. The gui manager is a special widget only |
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24 * implementing IParentWidget; all other widgets must implement IChildWidget and optionally |
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25 * IParentWidget. |
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26 *************************************************************************************************/ |
32
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27 module mde.gui.widget.Ifaces; |
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28 |
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29 public import mde.gui.types; |
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30 public import mde.gui.renderer.IRenderer; |
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Enums handled more generically now via either a popup list or flat list of BoolContentWidgets.
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31 import mde.content.Content; |
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32 |
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33 |
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34 /************************************************************************************************* |
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35 * Interface for parent widgets, including IWidgetManager. |
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Fixed resizing bugs in previous commit and made code cleaner and more efficient.
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36 * |
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minSizeChange() allows run-time changes to widgets' minimal size (except for shrinking in a GridLayoutWidget).
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37 * All widgets implement this via AWidget to make things simpler (code sharing). |
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minSizeChange() allows run-time changes to widgets' minimal size (except for shrinking in a GridLayoutWidget).
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38 * |
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39 * Notation: |
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40 * Positive/negative direction: along the x/y axis in this direction. |
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41 * Layout widget: a widget containing multiple sub-widges (which hence controls how they are |
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42 * laid out). |
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43 *************************************************************************************************/ |
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44 interface IParentWidget |
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45 { |
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46 /** Checks for recursion of unsafe widgets to prevent infinite recursion. */ |
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47 void recursionCheck (widgetID); |
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48 |
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49 /** Child widgets should call this on their parent if their minimal size changes, since they |
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50 * cannot resize themselves. |
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51 * |
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52 * Children may depend on their parent resizing them if necessary to keep width valid. |
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53 * Widgets may also depend on setPosition being called afterwards. |
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54 * |
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55 * Params: |
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56 * widget = The child widget calling the function |
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57 * mw = New minimal width |
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58 * mh = New minimal height */ |
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59 void minWChange (IChildWidget widget, wdim mw); |
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60 void minHChange (IChildWidget widget, wdim mh); /// ditto |
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61 |
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62 /** Governor of parent widget resizability, where this is determined by sub-widgets |
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63 * (e.g. this doesn't apply to FloatingAreaWidget). |
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64 * |
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65 * NEVER and ALWAYS often don't result in usable GUIs, and aren't expected to be used except |
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66 * for debugging. |
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67 * |
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68 * NOTE: ANY_SUBWIDGETS can cause problems like enlarging a menu bar containing a resizable |
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69 * blank instead of the main part of a window. */ |
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70 enum SIZABILITY_ENUM { |
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71 NEVER = 0, /// Parents are never resizable |
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72 ALL_SUBWIDGETS = 3, /// Parents are only resizable if all sub-widgets are |
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73 ANY_SUBWIDGETS = 2, /// Parents are resizable if any sub-widgets are |
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74 ALWAYS = 1, /// Parents are always resizable |
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75 START_TRUE = 1, /// Flag set by ALWAYS and ALL_SUBWIDGETS |
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76 SUBWIDGETS = 2, /// Flag set by ALL_SUBWIDGETS and ANY_SUBWIDGETS |
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77 } |
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78 static const SIZABILITY = SIZABILITY_ENUM.ALL_SUBWIDGETS; /// ditto |
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79 } |
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80 |
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81 |
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82 /************************************************************************************************* |
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83 * Interface for the widget manager. |
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84 * |
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85 * This class handles widget rendering, input, loading and saving. |
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86 *************************************************************************************************/ |
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87 interface IWidgetManager : IParentWidget |
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88 { |
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89 // Loading/saving: |
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90 /** Create a widget by looking up the data for id then looking up data.ints[0] in WIDGET_TYPES. |
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91 * |
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92 * Params: |
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93 * id = Identifier, within data files, of the data for the widget. |
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ContentList content type; getting content items/lists from Options generically via content.Items, and a new addContent widget function. Several improvements to generic handling of content. New button-with-text widget.
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94 * data = Pass this data to the widget, not data looked up via id. |
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95 * content = An IContent may be passed to some widgets on creation. |
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96 * |
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97 * When used in a this(), super() should be called before any calls to makeWidget (or at least |
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98 * parent and id set) due to recursionCheck being called on the widget. |
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99 * |
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100 * Creates a widget, using the widget data with index id. Widget data is loaded from files, |
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101 * and per design (multiple gui layouts, called designs, may exist; data is per design). */ |
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102 IChildWidget makeWidget (IParentWidget parent, widgetID id, IContent content = null); |
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103 |
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104 /** Get or set widget id's WidgetData or dimension data. |
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105 * |
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106 * WidgetData is for most data, dimensional data (wdims) is for dimensions. |
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107 * |
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108 * Data should only be set from IChildWidget.saveChanges() to |
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109 * avoid setting multiple times when a widget id has several instances. */ |
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110 WidgetData widgetData (widgetID id); |
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111 void widgetData (widgetID id, WidgetData data); /// ditto |
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112 wdims dimData (widgetID id); /// ditto |
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113 void dimData (widgetID id, wdims d); /// ditto |
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114 |
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115 // Rendering: |
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116 /** For when a widget needs redrawing. |
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117 * |
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118 * Must be called because rendering may only be done on events. |
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119 * |
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120 * Currently it just causes everything to be redrawn next frame. */ |
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121 void requestRedraw (); |
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122 |
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123 /** Get the window's renderer. |
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124 * |
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125 * Normally specific to the GUI, but widgets have no direct contact with the GUI and this |
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126 * provides the possibility of per-window renderers (if desired). */ |
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127 IRenderer renderer (); |
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128 |
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129 /** Creates and positions a pop-up widget (widg), |
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130 * |
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131 * Set flags = 1 to place widg left or right of parent, otherwise it will be placed above or |
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132 * below parent. |
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133 * |
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134 * WidgetManager sets its position, draws it, and passes it click events. If a click event |
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135 * occurs which isn't on the popup or it's parent, it is removed (unless a newer |
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136 * popup is not removed). |
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137 * |
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138 * Popups currently should not change their size while active. */ |
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139 void addPopup (IChildWidget parent, IChildWidget popup, int flags = 0); |
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140 /** Remove the popup added by this parent, and any popups added afterwards. |
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141 * If parent added multiple popups, this would just remove the top one. */ |
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142 void removePopup (IChildWidget parent); |
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143 |
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144 // User input: |
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145 /** Add a mouse click callback. |
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146 * |
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147 * This is a delegate this will be called for all mouse click events recieved by the gui, not |
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148 * simply all click events on the widget (as clickEvent recieves). |
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149 * |
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150 * The delegate should return true if it accepts the event and no further processing is |
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151 * required (i.e. the event should not be handled by anything else), false otherwise. */ |
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152 void addClickCallback (bool delegate (wdabs cx, wdabs cy, ubyte b, bool state) dg); |
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153 |
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154 /** Add a mouse motion callback: delegate will be called for all motion events recieved by the |
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155 * gui. */ |
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156 void addMotionCallback (void delegate (wdabs cx, wdabs cy) dg); |
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157 |
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158 /** Remove all event callbacks on this widget (according to the delegate's .ptr). */ |
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159 // Note: don't try to pass a reference and cast to void* in the function; it's a different address. |
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160 void removeCallbacks (void* frame); |
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161 } |
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162 |
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163 |
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164 /************************************************************************************************* |
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165 * Interface for (child) widgets, i.e. all widgets other than the manager. |
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166 * |
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167 * A widget is a region of a GUI window which handles rendering and user-interaction for itself |
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168 * and is able to communicate with its manager and child widgets as necessary. (Passing widgets |
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169 * a reference to their parent has not been found useful.) |
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170 * |
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171 * If a widget is to be creatable by IWidgetManager.makeWidget, it must be listed in the |
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172 * createWidget module, and have a constructor of the following form. It should also update it's |
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173 * creation data if necessary, either when changed or when saveChanges() is called, using |
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174 * IWidgetManager.setData(). |
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175 * It should use Ddoc to explain what initialization data is used. |
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176 * ---------------------------------- |
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177 * /++ Constructor for a ... widget. |
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178 * + |
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179 * + Widget uses the initialisation data: |
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180 * + [widgetID, x, y] |
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181 * + where x is ... and y is ... +/ |
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182 * this (IWidgetManager mgr, widgetID id, WidgetData data); |
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183 * |
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184 * /// The CTOR may take an IContent reference: |
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185 * this (IWidgetManager mgr, widgetID id, WidgetData data, IContent content); |
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186 * ---------------------------------- |
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187 * Where mgr is the widget manager, id is the _id passed to makeWidget() and data is |
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188 * initialisation data. The method should throw a WidgetDataException (created without |
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189 * parameters) if the data has wrong length or is otherwise invalid. |
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190 * |
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191 * All widgets should set their own size in this() or setup() (must be setup() if it could change), |
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192 * although some parents may set child-widgets' size during their creation. |
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193 *************************************************************************************************/ |
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194 //NOTE: add another this() without the data for default initialization, for the GUI editor? |
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195 interface IChildWidget : IParentWidget |
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196 { |
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197 //BEGIN Load and save |
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198 /** 2nd stage of initialization for widgets; also called on some changes. |
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199 * |
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200 * Widgets should call recursively on their children, redo anything indicated by flags, and |
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201 * adjust their size and other cached data dependant on any thing which may have changed. |
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202 * Widgets may rely on setPosition being called afterwards. |
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203 * |
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204 * Params: |
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205 * n = Indicates this is the (n+1)-th time the function has been called. |
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206 * flags = if (flags & 1) the renderer has been changed, |
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207 * if (flags & 2) translation strings are being reloaded. |
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208 * These flags are always true on first run. |
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209 * |
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210 * Returns: |
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211 * The method should return true if the dimensions (may) have been changed. This may not be |
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212 * the case on the first run (when n == 0)!. |
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213 */ |
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214 bool setup (uint n, uint flags); |
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215 |
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216 /** When this is called, if the widget has any changed data to save it should call |
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217 * IWidgetManager.setData (id, data) to set it and return true. Otherwise it should return |
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218 * false. |
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219 * |
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220 * If the widget has subwidgets, it should also be recursively called on these (passing their |
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221 * ids). */ |
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222 bool saveChanges (); |
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223 |
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224 /+ Use when widget editing is available? Requires widgets to know their parents. |
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225 /** Called when a child widget's size has changed. |
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226 * |
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227 * Should be propegated up to parents. */ |
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228 void childChanged (); |
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229 +/ |
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230 |
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231 //END Load and save |
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232 |
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233 //BEGIN Size and position |
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234 /** Is the width / height resizable? |
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235 * |
130
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236 * Normally, this means does the widget benifit from being enlarged? If not, the widget has |
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237 * "fixed" dimensions equal to it's minimal size; however it $(I may) still be enlarged. |
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238 * |
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239 * Parents normally take their resizability from sub-widgets; see SIZABILITY for how they do |
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240 * this. */ |
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241 bool isWSizable (); |
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242 bool isHSizable (); /// ditto |
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243 |
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244 /** The minimal size the widget could be shrunk to (or its fixed size). |
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245 * |
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246 * Takes into account child-widgets and any other contents. */ |
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247 wdim minWidth (); |
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248 wdim minHeight (); /// ditto |
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249 |
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250 /** Get the current size of the widget. */ |
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251 wdim width (); |
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252 wdim height(); /// ditto |
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253 |
113
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254 /** (Smallest) coordinates of widget. */ |
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255 wdabs xPos (); |
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256 wdabs yPos (); /// ditto |
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257 |
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258 /** Used to adjust the size. |
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259 * |
46
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260 * Params: |
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261 * nw/nh = The new width/height |
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262 * dir = Direction to resize from. This is only really applicable to layout widgets. |
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263 * It must be either -1 (start resizing from highest row/col index, decreasing the |
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264 * index as necessary), or +1 (resize from the lowest index, i.e. 0). |
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265 * Most widgets can simply ignore it. |
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266 * |
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267 * A widget should never be resized smaller than it's minimal size (if it is, it should assume |
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268 * it's minimal size and print a warning when in debug mode). |
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269 * A "fixed" size widget should enlarge itself as requested. |
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270 * |
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271 * setPosition must be called after calling either setWidth or setHeight. */ |
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272 void setWidth (wdim nw, int dir); |
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273 void setHeight (wdim nh, int dir); /// ditto |
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274 |
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275 /** Set the current position (called after setup and to move widget). */ |
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276 void setPosition (wdim x, wdim y); |
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277 //END Size and position |
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278 |
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279 //BEGIN Events |
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280 /** Recursively scan the widget tree to find the widget under (cx,cy). |
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281 * |
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282 * If called on a widget, that widget should assume the location is over itself, and so should |
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283 * either return itself or the result of calling getWidget on the appropriate child widget. |
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284 * |
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285 * In the case of Window this may not be the case; it should check and return null if not under |
117
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286 * (cx,cy). |
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287 * |
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288 * Note: use global coordinates (cx,cy) not coordinates relative to the widget. */ |
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289 IChildWidget getWidget (wdabs cx, wdabs cy); |
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290 |
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291 /** Return true if (cx,cy) is on self's box (doesn't matter if actually on a subwidget). */ |
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292 bool onSelf (wdabs cx, wdabs cy); |
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293 |
99
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294 /** 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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295 * which is a down-click if state is true. |
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296 * |
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297 * Widget may assume coordinates are on the widget (caller must check). |
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298 * |
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299 * The return value has the following flags: 1 to request keyboard input. */ |
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300 int clickEvent (wdabs cx, wdabs cy, ubyte b, bool state); |
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301 |
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302 /** Receives keyboard events when requested. |
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303 * |
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304 * Params: |
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305 * sym SDLKey key sym, useful for keys with no character code such as arrow keys |
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306 * letter The character input, in UTF-8 */ |
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307 void keyEvent (ushort sym, char[] letter); |
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308 |
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309 /** Called when keyboard input focus is lost. */ |
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310 void keyFocusLost (); |
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311 |
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312 /** Called when the mouse moves over the button and when it leaves. No need to call |
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313 * requestRedraw. */ |
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314 void highlight (bool state); |
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315 |
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316 /** When a pop-up is closed the manager calls requestRedraw and this function on its parent. */ |
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317 void popupClose (); |
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318 /** When a click is on the parent of a popup, this function is called instead of the usual |
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319 * clickEvent. |
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320 * |
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321 * Returns: |
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322 * true to close the popup. |
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323 * |
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324 * Note: this means the parent can't receive text input without code changes. */ |
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325 bool popupParentClick (); |
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326 |
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327 //END Events |
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328 |
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329 /** Draw, using the stored values of x and y. |
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330 * |
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331 * Maybe later enforce clipping of all sub-widget drawing, particularly for cases where only |
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332 * part of the widget is visible: scroll bars or a hidden window. */ |
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333 void draw (); |
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334 |
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335 /// Logs the current and minimal size of every widget. |
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336 debug void logWidgetSize (); |
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337 } |