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annotate mde/gui/WidgetManager.d @ 85:56c0ddd90193

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Intermediate commit (not stable). Changes to init system.
author Diggory Hardy <diggory.hardy@gmail.com>
date Thu, 11 Sep 2008 11:33:51 +0100
parents e0f1ec7fe73a
children 79d816b3e2d2
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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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16 /*************************************************************************************************
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17 * The gui manager class.
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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.WidgetManager;
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23
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24 import mde.gui.WidgetDataSet;
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25 import mde.gui.widget.Ifaces;
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26 import mde.gui.renderer.createRenderer;
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28 // For adding the input event callbacks and requesting redraws:
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29 import imde = mde.imde;
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30 import mde.input.Input;
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31 import mde.scheduler.Scheduler;
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32 import mde.setup.Screen;
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34 import tango.core.sync.Mutex;
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35 import tango.util.log.Log : Log, Logger;
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36
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37 private Logger logger;
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38 static this () {
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39 logger = Log.getLogger ("mde.gui.WidgetManager");
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40 }
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42 /*************************************************************************************************
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43 * The widget manager.
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44 *
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45 * This is responsible for loading and saving an entire gui (although more than one may exist),
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46 * controlling the rendering device (e.g. the screen or a texture), and providing user input.
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47 *
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48 * Currently mouse coordinates are passed to widgets untranslated. It may make sense to translate
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49 * them and possibly drop events for some uses, such as if the gui is drawn to a texture.
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50 *
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51 * Aside from the IWidgetManager methods, this class should be thread-safe.
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52 *************************************************************************************************/
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53 class WidgetManager : WidgetLoader, Screen.Drawable {
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54 /** Construct a new widget manager.
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55 *
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56 * params:
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57 * fileName = Name of file specifying the gui, excluding path and extension.
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58 */
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59 this (char[] file) {
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60 super(file);
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62 Screen.addDrawable (this);
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63 }
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64
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65 // NOTE - temporarily here to allow CTOR to run safely during static this
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66 // called during init
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67 void init () {
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68 // Doesn't need a lock - cannot conflict with other class functions.
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69 // Events we want to know about:
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70 imde.input.addMouseClickCallback(&clickEvent);
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71 imde.input.addMouseMotionCallback(&motionEvent);
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72 }
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75 /** Draw the gui. */
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76 void draw() {
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77 debug logger.trace ("drawing; w,h = {},{}",w,h);
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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 }
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84 /** For mouse click events.
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85 *
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86 * Sends the event on to the relevant windows and all click callbacks. */
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87 void clickEvent (ushort cx, ushort cy, ubyte b, bool state) {
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88 debug scope (failure)
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89 logger.warn ("clickEvent: failed!");
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90 mutex.lock;
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91 scope(exit) mutex.unlock;
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92 if (child is null) return;
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93
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94 // NOTE: buttons receive the up-event even when drag-callbacks are in place.
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95 foreach (dg; clickCallbacks)
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96 // See IWidgetManager.addClickCallback's documentation:
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97 if (dg (cast(wdabs)cx, cast(wdabs)cy, b, state)) return;
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98
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99 // NOTE: do we need to test if the click was on the gui (and thus child)?
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100 // FIXME: yes, unless we can guarantee this!
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101 IChildWidget widg = child.getWidget (cast(wdabs)cx,cast(wdabs)cy);
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102 if (widg !is null)
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103 widg.clickEvent (cast(wdabs)cx,cast(wdabs)cy,b,state);
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104 }
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105
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106 /** For mouse motion events.
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107 *
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108 * Sends the event on to all motion callbacks. */
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109 void motionEvent (ushort cx, ushort cy) {
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110 debug scope (failure)
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111 logger.warn ("motionEvent: failed!");
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112 mutex.lock;
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113 scope(exit) mutex.unlock;
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114
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115 foreach (dg; motionCallbacks)
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116 dg (cast(wdabs)cx, cast(wdabs)cy);
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117 }
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120 void sizeEvent (int nw, int nh) { // Drawable function
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121 mutex.lock;
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122 scope(exit) mutex.unlock;
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123
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124 w = cast(wdim) nw;
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125 h = cast(wdim) nh;
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126
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127 debug logger.trace ("Resize to: {},{}", nw, nh);
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128 if (w < mw || h < mh)
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129 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h);
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130
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131 if (!child) return; // if not created yet.
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132 child.setWidth (w, -1);
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133 child.setHeight (h, -1);
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134 child.setPosition (0,0);
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135 }
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136
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137 //BEGIN IWidgetManager methods
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138 // These methods are only intended for use within the gui package. They are not necessarily
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139 // thread-safe.
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140 IRenderer renderer () {
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141 assert (rend !is null, "WidgetManager.renderer: rend is null");
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142 return rend;
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143 }
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144
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145 void requestRedraw () {
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146 imde.mainSchedule.request(imde.SCHEDULE.DRAW);
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147 }
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148
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149 void addClickCallback (bool delegate(wdabs, wdabs, ubyte, bool) dg) {
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150 clickCallbacks[dg.ptr] = dg;
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151 }
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152 void addMotionCallback (void delegate(wdabs, wdabs) dg) {
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153 motionCallbacks[dg.ptr] = dg;
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154 }
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155 void removeCallbacks (void* frame) {
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156 clickCallbacks.remove(frame);
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157 motionCallbacks.remove(frame);
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158 }
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159 //END IWidgetManager methods
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160
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161 protected:
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162 /* Second stage of widget loading.
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163 * Note: sizeEvent should be called with window size before this. */
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164 void createRootWidget () {
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165 // The renderer needs to be created on the first load, but not after this.
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166 if (rend is null)
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167 rend = createRenderer (rendName);
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168
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169 child = makeWidget ("root");
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170
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171 mw = child.minWidth;
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172 mh = child.minHeight;
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173
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174 if (w < mw || h < mh)
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175 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h);
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176
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177 child.setWidth (w, -1);
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178 child.setHeight (h, -1);
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179 child.setPosition (0,0);
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180 }
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181
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182 private:
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183 // callbacks indexed by their frame pointers:
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184 bool delegate(wdabs cx, wdabs cy, ubyte b, bool state) [void*] clickCallbacks;
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185 void delegate(wdabs cx, wdabs cy) [void*] motionCallbacks;
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186 IRenderer rend;
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187 wdim w,h; // area available to the widgets
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188 wdim mw,mh; // minimal area available to the widgets
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189 }
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190
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191
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192 import mde.gui.exception;
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193 import mde.gui.widget.Ifaces;
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194 import mde.gui.widget.createWidget;
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195
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196 import mde.file.mergetag.Reader;
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197 import mde.file.mergetag.Writer;
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198 import mde.setup.paths;
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199
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200 /*************************************************************************************************
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201 * Contains the code for loading and saving the gui, but not the code for drawing it or handling
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202 * user input.
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203 *
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204 * This abstract class exists solely for separating out some of the functionality.
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205 *************************************************************************************************/
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206 abstract scope class WidgetLoader : IWidgetManager
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207 {
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208 /** Construct a new widget loader.
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209 *
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210 * params:
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211 * fileName = Name of file specifying the gui, excluding path and extension.
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212 */
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213 protected this (char[] file) {
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214 mutex = new Mutex; // Used on functions intended to be called from outside the gui package.
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215 fileName = file;
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216 }
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217
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218 /* Load the widgets' data from the file specified to the CTOR.
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219 *
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220 * params:
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221 * allDesigns = Load all sections
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222 */
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223 private void loadData (bool allDesigns = false) {
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224 if (allLoaded || (defaultDesign !is null && allDesigns == false))
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225 return; // test if already loaded
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226
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227 // Set up a reader
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228 scope IReader reader;
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229 try {
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230 reader = confDir.makeMTReader (fileName, PRIORITY.HIGH_LOW, null, true);
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231
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232 // Read from the HEADER:
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233 // Get the renderer
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234 char[]* p = "Renderer" in reader.dataset.header._charA;
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235 if (p is null || *p is null) {
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236 logger.warn ("No renderer specified: using \"Simple\"");
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237 rendName = "Simple";
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238 }
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239 else
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240 rendName = *p;
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241
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242 // Get which section to use
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243 p = "Design" in reader.dataset.header._charA;
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244 if (p is null || *p is null) {
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245 logger.warn ("No gui design specified: trying \"Default\"");
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246 defaultDesign = "Default";
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247 }
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diff changeset
248 else
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diff changeset
249 defaultDesign = *p;
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diff changeset
250
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diff changeset
251 // Read the body:
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diff changeset
252 // Load the chosen design
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diff changeset
253 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) {
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254 WidgetDataSet* p = id in data;
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diff changeset
255 if (p is null) {
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256 data[id] = new WidgetDataSet;
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diff changeset
257 return *(id in data);
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258 }
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259 return *p;
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260 };
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diff changeset
261
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diff changeset
262 if (allDesigns) {
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diff changeset
263 reader.read;
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264 allLoaded = true;
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265 } else
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266 reader.read([defaultDesign]);
81
d8fccaa45d5f Moved file IO code from mde/mergetag to mde/file[/mergetag] and changed how some errors are caught.
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267 } catch (NoFileException) {
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268 logger.error ("Unable to load GUI: no config file!");
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269 // just return: not a fatal error (so long as the game can run without a GUI!)
80
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270 } catch (Exception e) {
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diff changeset
271 logger.error ("Unable to load GUI: errors parsing config file ("~confDir.getFileName(fileName,PRIORITY.HIGH_LOW)~"):");
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diff changeset
272 logger.error (e.msg);
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diff changeset
273 throw new GuiException ("Failure parsing config file");
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274 }
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275 }
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276
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diff changeset
277 /** Load the gui from some design.
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278 *
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279 * If a design was previously loaded, its changes are saved first.
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280 *
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diff changeset
281 * Params:
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282 * name = Design to load. If null, the default will be loaded.
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diff changeset
283 */
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diff changeset
284 void loadDesign (char[] name = null) {
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diff changeset
285 if (changes !is null)
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diff changeset
286 save; // own lock
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diff changeset
287
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diff changeset
288 mutex.lock;
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diff changeset
289 scope(exit) mutex.unlock;
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diff changeset
290
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diff changeset
291 // Load data (loadData tests if it's already loaded first):
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diff changeset
292 if (name is null) {
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diff changeset
293 loadData (false);
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diff changeset
294 name = defaultDesign;
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diff changeset
295 } else
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diff changeset
296 loadData (true);
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diff changeset
297
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diff changeset
298
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diff changeset
299 // Get data:
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diff changeset
300 auto p = name in data;
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diff changeset
301 while (p is null) {
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diff changeset
302 if (name == defaultDesign)
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diff changeset
303 throw new GuiException ("Unable to load [specified or] default design");
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diff changeset
304 name = defaultDesign; // try again with the default
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diff changeset
305 p = name in data;
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diff changeset
306 }
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diff changeset
307 curData = *p;
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diff changeset
308
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diff changeset
309 // Get/create a changes section:
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diff changeset
310 if (changesDS is null)
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diff changeset
311 changesDS = new mt.DataSet;
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diff changeset
312
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diff changeset
313 mt.IDataSection* q = name in changesDS.sec;
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diff changeset
314 if (q && ((changes = cast(WidgetDataChanges) *q) !is null)) {}
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diff changeset
315 else {
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diff changeset
316 changes = new WidgetDataChanges (curData);
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diff changeset
317 changesDS.sec[name] = changes;
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diff changeset
318 }
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diff changeset
319
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diff changeset
320 // Create the widgets:
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diff changeset
321 createRootWidget;
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diff changeset
322 }
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parents: 76
diff changeset
323
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diff changeset
324 /** Save changes, if any exist.
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diff changeset
325 *
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diff changeset
326 * Is run when the manager is destroyed, but could be run at other times too. */
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diff changeset
327 void save () {
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diff changeset
328 mutex.lock;
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diff changeset
329 scope(exit) mutex.unlock;
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parents: 76
diff changeset
330
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diff changeset
331 // Make all widgets save any changed data; return if no changes:
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diff changeset
332 if (!child.saveChanges ("root"))
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diff changeset
333 return;
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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parents: 76
diff changeset
334
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diff changeset
335 if (loadUserFile) { // merge entries from user file into current changes
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parents: 76
diff changeset
336 try {
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diff changeset
337 scope IReader reader = confDir.makeMTReader (
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diff changeset
338 fileName, PRIORITY.HIGH_ONLY, changesDS, true);
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parents: 76
diff changeset
339
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
340 // Create if necessary, only corresponding to existing designs read:
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diff changeset
341 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) {
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parents: 76
diff changeset
342 WidgetDataSet* p = id in data;
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 76
diff changeset
343 if (p is null)
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parents: 76
diff changeset
344 throw new Exception ("File has changed since it was loaded!");
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diff changeset
345 return new WidgetDataChanges (*p);
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parents: 76
diff changeset
346 };
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diff changeset
347
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diff changeset
348 reader.read;
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diff changeset
349 } catch (NoFileException) {
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parents: 76
diff changeset
350 // No user file exists; not an error.
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parents: 76
diff changeset
351 } catch (Exception e) {
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
352 logger.error ("Error reading "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" prior to saving:");
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diff changeset
353 logger.error (e.msg);
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diff changeset
354 logger.error ("Overwriting the file.");
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parents: 76
diff changeset
355 // Continue...
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parents: 76
diff changeset
356 }
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
357 loadUserFile = false; // don't need to do it again
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diff changeset
358 }
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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parents: 76
diff changeset
359
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diff changeset
360 try { // Save
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diff changeset
361 IWriter writer;
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diff changeset
362 writer = confDir.makeMTWriter (fileName, changesDS);
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diff changeset
363 writer.write;
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diff changeset
364 } catch (Exception e) {
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parents: 76
diff changeset
365 logger.error ("Saving to "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" failed:");
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diff changeset
366 logger.error (e.msg);
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diff changeset
367 // No point in throwing since it doesn't affect anything else.
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diff changeset
368 }
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
369 }
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diff changeset
370
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
371 /** Get the names of all designs available. */
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diff changeset
372 char[][] designs() {
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diff changeset
373 synchronized(mutex) {
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diff changeset
374 loadData (true);
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diff changeset
375 return data.keys;
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diff changeset
376 }
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
377 }
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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parents: 76
diff changeset
378
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diff changeset
379
ea58f277f487 Gui reorganization and changes; partial implementation of floating widgets.
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diff changeset
380 /** Create a widget by ID. */
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diff changeset
381 IChildWidget makeWidget (widgetID id, IParentWidget parent = null) {
85
56c0ddd90193 Intermediate commit (not stable). Changes to init system.
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parents: 84
diff changeset
382 debug (mdeWidgets) logger.trace ("Creating widget \""~id~'"');
80
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383 return createWidget (this, curData[id], parent);
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384 }
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385
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386 /** For making changes. */
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387 void setData (widgetID id, WidgetData d) {
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388 changes[id] = d; // also updates WidgetDataSet in data.
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389 }
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390
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391 /** Second stage of loading the widgets.
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392 *
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393 * loadDesign handles the data; this method needs to:
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394 * ---
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395 * // 1. Create the root widget:
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396 * child = makeWidget ("root");
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397 * // 2. Set the setSize, e.g.:
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398 * child.setWidth (child.minWidth, 1);
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399 * child.setHeight (child.minHeight, 1);
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400 * ---
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401 */
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402 void createRootWidget();
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403
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404 protected:
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405 final char[] fileName;
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406 char[] defaultDesign; // The design specified in the file header.
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407 char[] rendName; // Name of renderer; for saving and creating renderers
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408
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409 // Loaded data, indexed by design name. May not be loaded for all gui designs:
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410 scope WidgetDataSet[char[]] data;
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411 private bool allLoaded = false; // applies to data
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412 WidgetDataSet curData; // Current data
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413 WidgetDataChanges changes; // Changes for the current design.
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414 scope mt.DataSet changesDS; // changes and sections from user file (used for saving)
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415 bool loadUserFile = true; // still need to load user file for saving?
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416
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417 scope IChildWidget child; // The primary widget.
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418
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419 Mutex mutex; // lock on methods for use outside the package.
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420 }