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annotate mde/gui/WMScreen.d @ 122:f96e8d18c00a

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author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 02 Jan 2009 18:10:14 +0000
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children c9843fbaac88
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122
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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 * A gui manager class using mde.setup.Screen and mde.input.Input.
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18 *
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19 * This is the module to use externally to create a graphical user interface (likely also with
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20 * content modules).
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21 *************************************************************************************************/
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22 module mde.gui.WMScreen;
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23
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24 import mde.gui.WidgetManager;
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25 import mde.gui.widget.Ifaces;
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26 import mde.gui.renderer.createRenderer;
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27
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28 import mde.setup.Screen;
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29 import Items = mde.content.Items; // loadTranslation
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30 import mde.lookup.Options; // miscOpts.L10n callback
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31
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32 import tango.util.log.Log : Log, Logger;
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33
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34 private Logger logger;
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35 static this () {
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36 logger = Log.getLogger ("mde.gui.WMScreen");
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37 }
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38
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39 /*************************************************************************************************
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40 * The widget manager.
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41 *
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42 * This provides a layer on top of WidgetLoader, handling input and rendering. Other functionality
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43 * is contained in the super class, to simplify supporting new input/graphics libraries.
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44 *
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45 * Currently mouse coordinates are passed to widgets untranslated. It may make sense to translate
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46 * them and possibly drop events for some uses, such as if the gui is drawn to a texture.
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47 *
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48 * Aside from the IWidgetManager methods, this class should be thread-safe.
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49 *************************************************************************************************/
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50 scope class WMScreen : AWidgetManager, Screen.IDrawable {
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51 /** Construct a new widget manager.
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52 *
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53 * params:
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54 * fileName = Name of file specifying the gui, excluding path and extension.
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55 */
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56 this (char[] file) {
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57 super(file);
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58
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59 Screen.addDrawable (this);
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60 clickCallbacks = new typeof(clickCallbacks);
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61 motionCallbacks = new typeof(motionCallbacks);
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62 }
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63
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64 // this() runs during static this(), when imde.input doesn't exist. init() runs later.
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65 void init () {
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66 // Doesn't need a lock - cannot conflict with other class functions.
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67 // Events we want to know about:
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68 imde.input.addMouseClickCallback(&clickEvent);
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69 imde.input.addMouseMotionCallback(&motionEvent);
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70
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71 Items.loadTranslation ();
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72 miscOpts.L10n.addCallback (&reloadStrings);
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73 }
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74
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75
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76 /** Draw the gui. */
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77 void draw() {
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78 synchronized(mutex) {
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79 if (child)
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80 child.draw;
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81 foreach (popup; popups)
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82 popup.widget.draw();
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83 }
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84 }
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85
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86 /** For mouse click events.
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87 *
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88 * Sends the event on to the relevant windows and all click callbacks. */
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89 void clickEvent (ushort usx, ushort usy, ubyte b, bool state) {
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90 debug scope (failure)
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91 logger.warn ("clickEvent: failed!");
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92 mutex.lock;
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93 scope(exit) mutex.unlock;
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94 if (child is null) return;
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95
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96 wdabs cx = cast(wdabs) usx, cy = cast(wdabs) usy;
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97
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98 // 1. Callbacks have the highest priority recieving events (e.g. a button release)
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99 foreach (dg; clickCallbacks)
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100 if (dg (cx, cy, b, state)) return;
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101
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102 // 2. Then pop-ups: close from top, depending on click pos
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103 // Note: assumes each evaluated popup's parent is not under another still open popup.
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104 // Also assumes popup's parent doesn't have other children in its box.
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105 size_t removeTo = popups.length;
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106 bool eventDone; // don't pass clickEvent
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107 IChildWidget widg; // widget clicked on
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108 foreach_reverse (i,popup; popups) with (popup) {
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109 if (cx < x || cx >= x + w ||
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110 cy < y || cy >= y + h) { // on popup
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111 if (parent.onSelf (cx, cy)) {
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112 if (parent.popupParentClick()) removeTo = i;
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113 eventDone = true;
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114 break;
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115 } else {
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116 removeTo = i;
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117 parent.popupClose;
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118 }
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119 } else {
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120 widg = widget.getWidget (cast(wdabs)cx,cast(wdabs)cy);
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121 break;
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122 }
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123 }
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124 if (removeTo < popups.length) {
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125 requestRedraw;
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126 popups = popups[0..removeTo];
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127 }
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128 if (eventDone)
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129 return;
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130
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131 // 3. Then the main widget tree
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132 debug assert (cx < child.width && cy < child.height, "WidgetManager: child doesn't cover whole area (code error)");
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133 if (widg is null)
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134 widg = child.getWidget (cast(wdabs)cx,cast(wdabs)cy);
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135 if (keyFocus && keyFocus !is widg) {
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136 keyFocus.keyFocusLost;
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137 keyFocus = null;
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138 imde.input.setLetterCallback (null);
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139 }
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140 if (widg !is null) {
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141 if (widg.clickEvent (cast(wdabs)cx,cast(wdabs)cy,b,state) & 1) {
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142 keyFocus = widg;
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143 imde.input.setLetterCallback (&widg.keyEvent);
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144 }
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145 }
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146 }
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147
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148 /** For mouse motion events.
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149 *
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150 * Sends the event on to all motion callbacks. */
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151 void motionEvent (ushort scx, ushort scy) {
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152 debug scope (failure)
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153 logger.warn ("motionEvent: failed!");
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154 mutex.lock;
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155 scope(exit) mutex.unlock;
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156 wdabs cx = cast(wdabs) scx, cy = cast(wdabs) scy;
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157 foreach (dg; motionCallbacks)
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158 dg (cx, cy);
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159
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160 IChildWidget ohighlighted = highlighted;
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161 foreach_reverse (popup; popups) with (popup) {
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162 if (cx >= x && cx < x+w && cy >= y && cy < y+h) {
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163 highlighted = widget.getWidget (cx,cy);
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164 goto foundPopup;
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165 }
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166 }
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167 highlighted = null; // not over a popup
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168 foundPopup:
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169 if (ohighlighted != highlighted) {
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170 if (ohighlighted)
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171 ohighlighted.highlight (false);
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172 if (highlighted)
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173 highlighted.highlight (true);
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174 requestRedraw;
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175 }
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176 }
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177
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178
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179 void sizeEvent (int nw, int nh) { // IDrawable function
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180 mutex.lock;
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181 scope(exit) mutex.unlock;
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182
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183 w = cast(wdim) nw;
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184 h = cast(wdim) nh;
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185
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186 if (w < mw || h < mh)
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187 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h);
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188
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189 if (!child) return; // if not created yet.
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190 child.setWidth (w, -1);
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191 child.setHeight (h, -1);
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192 child.setPosition (0,0);
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193 }
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194
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195 protected:
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196 /* Second stage of widget loading.
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197 * Note: sizeEvent should be called with window size before this. */
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198 final override void createRootWidget () {
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199 // The renderer needs to be created on the first load, but not after this.
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200 if (rend is null)
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201 rend = createRenderer (rendName);
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202 popups = null;
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203
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204 debug (mdeWidgets) logger.trace ("Creating root widget...");
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205 child = makeWidget (this, "root");
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206 debug (mdeWidgets) logger.trace ("Setting up root widget...");
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207 child.setup (0, 3);
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208
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209 mw = child.minWidth;
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210 mh = child.minHeight;
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211 if (w < mw || h < mh)
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212 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h);
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213
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214 debug (mdeWidgets) logger.trace ("Setting size and position of root widget...");
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215 child.setWidth (w, -1);
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216 child.setHeight (h, -1);
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217 child.setPosition (0,0);
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218 debug (mdeWidgets) logger.trace ("Done creating root widget.");
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219 }
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220
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221 final override void preSave () {
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222 if (keyFocus) {
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223 keyFocus.keyFocusLost;
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224 keyFocus = null;
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225 imde.input.setLetterCallback (null);
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226 }
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227 }
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228 }