Mercurial > projects > mde
annotate mde/gui/widget/Ifaces.d @ 90:b525ff28774b
Widgets generated dynamically from a list can now be standard widgets selected from data files.
Started on allowing alignment to be shared between instances of a layout widget in a dynamic list (to allow column alignment of list's rows).
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Wed, 01 Oct 2008 23:37:51 +0100 |
parents | 56c0ddd90193 |
children | 4d5d53e4f881 |
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 * Widgets are connected as the nodes of a tree. Widgets know their parent as a IParentWidget |
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20 * class and their children as IChildWidget classes. The gui manager is a special widget only |
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21 * implementing IParentWidget; all other widgets must implement IChildWidget and optionally |
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22 * IParentWidget. |
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23 *************************************************************************************************/ |
32
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24 module mde.gui.widget.Ifaces; |
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25 |
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26 public import mde.gui.types; |
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27 public import mde.gui.renderer.IRenderer; |
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28 import mde.gui.content.Content; //NOTE - maybe move IContent to a separate module |
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29 |
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30 |
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31 /************************************************************************************************* |
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32 * Common interface for all widgets. |
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33 * |
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34 * Notation: |
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35 * Positive/negative direction: along the x/y axis in this direction. |
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36 * Layout widget: a widget containing multiple sub-widges (which hence controls how they are |
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37 * laid out). |
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38 *************************************************************************************************/ |
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39 //NOTE: keep this? |
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40 interface IWidget |
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41 { |
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42 } |
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43 |
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44 |
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45 /************************************************************************************************* |
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46 * Interface for the widget manager. |
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47 * |
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48 * This class handles widget rendering, input, loading and saving. |
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49 *************************************************************************************************/ |
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50 interface IWidgetManager : IWidget |
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51 { |
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52 // Loading/saving: |
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53 /** Create a widget by ID. |
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54 * |
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55 * Params: |
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56 * id = Identifier, within data files, of the data for the widget. |
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57 * content = An IContent may be passed to some widgets on creation. |
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58 * |
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59 * Creates a widget, using the widget data with index id. Widget data is loaded from files, |
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60 * and per design (multiple gui layouts, called designs, may exist; data is per design). |
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61 */ |
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62 IChildWidget makeWidget (widgetID id, IContent content = null); |
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63 |
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64 /** Record some changes, for saving. */ |
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65 void setData (widgetID id, WidgetData); |
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66 |
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67 // Rendering: |
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68 /** For when a widget needs redrawing. |
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69 * |
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70 * Must be called because rendering may only be done on events. |
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71 * |
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72 * Currently it just causes everything to be redrawn next frame. */ |
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73 void requestRedraw (); |
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74 |
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75 /** Get the window's renderer. |
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76 * |
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77 * Normally specific to the GUI, but widgets have no direct contact with the GUI and this |
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78 * provides the possibility of per-window renderers (if desired). */ |
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79 IRenderer renderer (); |
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80 |
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81 |
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82 // User input: |
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83 /** Add a mouse click callback. |
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84 * |
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85 * This is a delegate this will be called for all mouse click events recieved by the gui, not |
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86 * simply all click events on the widget (as clickEvent recieves). |
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87 * |
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88 * The delegate should return true if it accepts the event and no further processing is |
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89 * required (i.e. the event should not be handled by anything else), false otherwise. |
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90 * |
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91 * Note that this is not a mechanism to prevent unwanted event handling, and in the future |
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92 * may be removed (so event handling cannot be cut short). */ |
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93 void addClickCallback (bool delegate (wdabs cx, wdabs cy, ubyte b, bool state) dg); |
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94 |
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95 /** Add a mouse motion callback: delegate will be called for all motion events recieved by the |
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96 * gui. */ |
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97 void addMotionCallback (void delegate (wdabs cx, wdabs cy) dg); |
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98 |
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99 // FIXME: keyboard callback (letter only, for text input? Also used for setting keybindings though...) |
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100 |
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101 /** Remove all event callbacks on this widget (according to the delegate's .ptr). */ |
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102 // Note: don't try to pass a reference and cast to void* in the function; it's a different address. |
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103 void removeCallbacks (void* frame); |
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104 } |
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105 |
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106 |
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107 /************************************************************************************************* |
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108 * Interface for (child) widgets, i.e. all widgets other than the manager. |
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109 * |
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110 * A widget is a region of a GUI window which handles rendering and user-interaction for itself |
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111 * and is able to communicate with its manager and child widgets as necessary. (Passing widgets |
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112 * a reference to their parent has not been found useful.) |
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113 * |
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114 * If a widget is to be creatable by IWidgetManager.makeWidget, it must be listed in the |
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115 * createWidget module, and have a constructor of the following form. It should also update it's |
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116 * creation data if necessary, either when changed or when saveChanges() is called, using |
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117 * IWidgetManager.setData(). |
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118 * It should use Ddoc to explain what initialization data is used. |
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119 * ---------------------------------- |
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120 * /++ Constructor for a ... widget. |
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121 * + |
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122 * + Widget uses the initialisation data: |
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123 * + [widgetID, x, y] |
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124 * + where x is ... and y is ... +/ |
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125 * this (IWidgetManager mgr, WidgetData data); |
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126 * |
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127 * /// The CTOR may take an IContent reference: |
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128 * this (IWidgetManager mgr, WidgetData data, IContent content); |
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129 * ---------------------------------- |
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130 * Where mgr is the widget manager and data is |
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131 * initialisation data. The method should throw a WidgetDataException (created without |
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132 * parameters) if the data has wrong length or is otherwise invalid. |
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133 * |
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134 * A parent widget is responsible for setting the size of its children widgets, however it must |
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135 * satisfy their minimal sizes as available from minWidth() and minHeight(). setWidth() and |
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136 * setHeight() are called on all widgets after creation. |
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137 *************************************************************************************************/ |
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138 //NOTE: add another this() without the data for default initialization, for the GUI editor? |
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139 interface IChildWidget : IWidget |
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140 { |
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141 //BEGIN Load and save |
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142 /** When this is called, if the widget has any changed data to save it should call |
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143 * IWidgetManager.setData (id, data) to set it and return true. Otherwise it should return |
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144 * false. |
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145 * |
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146 * If the widget has subwidgets, it should also be recursively called on these (passing their |
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147 * ids). */ |
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148 bool saveChanges (widgetID id); |
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149 |
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150 /** Called when the renderer is changed (at least when the changes affect dimensions). |
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151 * Also called after widget creation, before any other methods are called. |
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152 * |
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153 * Returns: true when widget's dimensions (may) have changed. |
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154 * |
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155 * Should be propegated down to all child widgets. */ |
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156 bool rendererChanged (); |
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157 |
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158 /+ Use when widget editing is available? Requires widgets to know their parents. |
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159 /** Called when a child widget's size has changed. |
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160 * |
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161 * Should be propegated up to parents. */ |
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162 void childChanged (); |
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163 +/ |
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164 //END Load and save |
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165 |
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166 //BEGIN Size and position |
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167 /** is the width / height resizable? |
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168 * |
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169 * If not, the widget has fixed dimensions equal the output of getMinimalSize. */ |
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170 bool isWSizable (); |
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171 bool isHSizable (); /// ditto |
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172 |
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173 /** The minimal size the widget could be shrunk to (or its fixed size). |
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174 * |
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175 * Takes into account child-widgets and any other contents. */ |
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176 wdim minWidth (); |
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177 wdim minHeight (); /// ditto |
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178 |
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179 /** Get the current size of the widget. |
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180 * |
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181 * Deprecated: is it needed now? |
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182 */ |
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183 deprecated void getCurrentSize (out wdim w, out wdim h); |
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184 |
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185 /** Used to adjust the size. |
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186 * |
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187 * Params: |
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188 * nw/nh = The new width/height |
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189 * dir = Direction to resize from. This is only really applicable to layout widgets. |
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190 * It must be either -1 (start resizing from highest row/col index, decreasing the |
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191 * index as necessary), or +1 (resize from the lowest index, i.e. 0). |
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192 * Most widgets can simply ignore it. |
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193 * |
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194 * If called with dimensions less than minWidth/minHeight return: the widget may set its size |
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195 * to either the dimension given or its minimal dimension (even though this is larger). If the |
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196 * larger size is set, events won't be received in the extra area. FIXME: sort out rendering. |
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197 * Otherwise, the dimensions should always be set exactly. |
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198 * |
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199 * setPosition must be called after calling either setWidth or setHeight. */ |
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200 void setWidth (wdim nw, int dir); |
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201 void setHeight (wdim nh, int dir); /// ditto |
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202 |
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203 /** Set the current position (i.e. called on init and move). */ |
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204 void setPosition (wdim x, wdim y); |
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205 //END Size and position |
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206 |
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207 //BEGIN Events |
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208 /** Recursively scan the widget tree to find the widget under (x,y). |
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209 * |
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210 * If called on a widget, that widget should assume the location is over itself, and so should |
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211 * either return itself or the result of calling getWidget on the appropriate child widget. |
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212 * |
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213 * In the case of Window this may not be the case; it should check and return null if not under |
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214 * (x,y). |
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215 * |
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216 * Note: use global coordinates (x,y) not coordinates relative to the widget. */ |
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217 IChildWidget getWidget (wdim x, wdim y); |
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218 |
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219 /** Receive a mouse click event. |
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220 * |
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221 * See mde.input.input.Input.MouseClickCallback for parameters. However, cx and cy are adjusted |
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222 * to the Widget's local coordinates. |
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223 * |
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224 * Widget may assume coordinates are on the widget (caller must check). */ |
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225 void clickEvent (wdabs cx, wdabs cy, ubyte b, bool state); |
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226 //END Events |
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227 |
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228 /** Draw, using the stored values of x and y. |
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229 * |
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230 * Maybe later enforce clipping of all sub-widget drawing, particularly for cases where only |
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231 * part of the widget is visible: scroll bars or a hidden window. */ |
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232 void draw (); |
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233 } |