Mercurial > projects > mde
annotate mde/gui/WidgetData.d @ 78:79a1809421aa
Widget data saving reimplemented for the new data system. (Now grid layout widgets remember their row & column sizes.)
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Tue, 29 Jul 2008 18:14:53 +0100 |
parents | 3dfd934100f7 |
children | 61ea26abe4dd |
rev | line source |
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A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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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 * Code to manage the data used to create widgets and save changes to it. |
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18 * |
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19 * When loading, a WidgetDataSet instance is loaded from file and its data used to create the |
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20 * widgets. An empty WidgetDataChanges instance is also created. |
25cb7420dc91
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21 * |
25cb7420dc91
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22 * If any data requires changing, it is added to the WidgetDataChanges instance, which also |
25cb7420dc91
A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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23 * updates the the WidgetDataSet instance used to load the widgets (in case of a re-load from this |
25cb7420dc91
A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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24 * data). When the data should be saved, if the WidgetDataChanges instance is not empty, data from |
25cb7420dc91
A massive overhaul/rewrite for the gui's data management and setup code. Currently much that was working is broken.
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25 * the highest priority (i.e. the user) file is merged into it, preserving both the current |
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26 * changes and previous changes saved to the use file, before saving to the user file. |
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27 *************************************************************************************************/ |
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28 module mde.gui.WidgetData; |
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29 |
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30 import mde.gui.exception; |
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31 import mde.gui.widget.Ifaces; |
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32 import mde.gui.widget.createWidget; |
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33 |
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34 // For loading from file: |
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35 import mt = mde.mergetag.DataSet; |
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36 import mt = mde.mergetag.DefaultData; |
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37 import mt = mde.mergetag.exception; |
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38 import mde.mergetag.Reader; |
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39 import mde.mergetag.Writer; |
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40 import mde.setup.paths; |
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41 import mde.mergetag.parse.parseTo; |
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42 import mde.mergetag.parse.parseFrom : parseFrom; |
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43 |
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44 import tango.core.sync.Mutex; |
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45 import tango.util.log.Log : Log, Logger; |
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46 |
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47 private Logger logger; |
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48 static this () { |
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49 logger = Log.getLogger ("mde.gui.WidgetData"); |
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50 } |
25cb7420dc91
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51 |
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52 |
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53 /************************************************************************************************* |
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54 * Contains the code for loading and saving the gui, but not the code for drawing it or handling |
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55 * user input. |
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56 * |
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57 * This abstract class exists solely for separating out some of the functionality. |
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58 *************************************************************************************************/ |
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59 abstract scope class WidgetLoader : IWidgetManager |
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60 { |
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61 /** Construct a new widget loader. |
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62 * |
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63 * params: |
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64 * fileName = Name of file specifying the gui, excluding path and extension. |
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65 */ |
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66 protected this (char[] file) { |
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67 mutex = new Mutex; // Used on functions intended to be called from outside the gui package. |
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68 fileName = file; |
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69 } |
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70 ~this () { |
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71 save; |
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72 } |
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73 |
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74 /* Load the widgets' data from the file specified to the CTOR. |
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75 * |
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76 * params: |
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77 * allDesigns = Load all sections |
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78 */ |
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79 private void loadData (bool allDesigns = false) { |
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80 if (allLoaded || (defaultDesign !is null && allDesigns == false)) |
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81 return; // test if already loaded |
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82 |
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83 if (!confDir.exists (fileName)) { |
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84 logger.error ("Unable to load GUI: no config file!"); |
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85 return; // not a fatal error (so long as the game can run without a GUI!) |
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86 } |
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87 |
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88 // Set up a reader |
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89 scope IReader reader; |
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90 try { |
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91 reader = confDir.makeMTReader (fileName, PRIORITY.HIGH_LOW, null, true); |
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92 |
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93 // Read from the HEADER: |
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94 // Get the renderer |
76
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95 char[]* p = "Renderer" in reader.dataset.header._charA; |
75
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96 if (p is null || *p is null) { |
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97 logger.warn ("No renderer specified: using \"Simple\""); |
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98 rendName = "Simple"; |
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99 } |
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100 else |
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101 rendName = *p; |
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102 |
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103 // Get which section to use |
76
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104 p = "Design" in reader.dataset.header._charA; |
75
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105 if (p is null || *p is null) { |
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106 logger.warn ("No gui design specified: trying \"Default\""); |
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107 defaultDesign = "Default"; |
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108 } |
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109 else |
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110 defaultDesign = *p; |
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111 |
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112 // Read the body: |
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113 // Load the chosen design |
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114 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) { |
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115 WidgetDataSet* p = id in data; |
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116 if (p is null) { |
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117 data[id] = new WidgetDataSet; |
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118 return *(id in data); |
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119 } |
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120 return *p; |
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121 }; |
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122 |
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123 if (allDesigns) { |
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124 reader.read; |
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125 allLoaded = true; |
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126 } else |
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127 reader.read([defaultDesign]); |
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128 } catch (Exception e) { |
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129 logger.error ("Unable to load GUI: errors parsing config file ("~confDir.getFileName(fileName,PRIORITY.HIGH_LOW)~"):"); |
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130 logger.error (e.msg); |
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131 throw new GuiException ("Failure parsing config file"); |
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132 } |
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133 } |
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134 |
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135 /** Load the gui from some design. |
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136 * |
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137 * If a design was previously loaded, its changes are saved first. |
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138 * |
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139 * Params: |
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140 * name = Design to load. If null, the default will be loaded. |
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141 */ |
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142 void loadDesign (char[] name = null) { |
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143 if (changes !is null) |
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144 save; // own lock |
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145 |
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146 mutex.lock; |
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147 scope(exit) mutex.unlock; |
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148 |
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149 // Load data (loadData tests if it's already loaded first): |
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150 if (name is null) { |
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151 loadData (false); |
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152 name = defaultDesign; |
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153 } else |
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154 loadData (true); |
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155 |
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156 |
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157 // Get data: |
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158 curData = data[name]; // NOTE: may throw |
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159 |
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160 // Get/create a changes section: |
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161 if (changesDS is null) |
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162 changesDS = new mt.DataSet; |
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163 |
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164 mt.IDataSection* p = name in changesDS.sec; |
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165 if (p && ((changes = cast(WidgetDataChanges) *p) !is null)) {} |
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166 else { |
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167 changes = new WidgetDataChanges (curData); |
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168 changesDS.sec[name] = changes; |
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169 } |
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170 |
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171 // Create the widgets: |
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172 createRootWidget; |
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173 } |
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174 |
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175 /** Save changes, if any exist. |
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176 * |
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177 * Is run when the manager is destroyed, but could be run at other times too. */ |
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178 void save () { |
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179 mutex.lock; |
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180 scope(exit) mutex.unlock; |
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181 |
78
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182 // Make all widgets save any changed data; return if no changes: |
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183 if (!child.saveChanges ("root")) |
75
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184 return; |
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185 |
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186 if (loadUserFile) { // merge entries from user file into current changes |
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187 try { |
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188 scope IReader reader = confDir.makeMTReader ( |
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189 fileName, PRIORITY.HIGH_ONLY, changesDS, true); |
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190 |
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191 // Create if necessary, only corresponding to existing designs read: |
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192 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) { |
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193 WidgetDataSet* p = id in data; |
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194 if (p is null) |
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195 throw new Exception ("File has changed since it was loaded!"); |
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196 return new WidgetDataChanges (*p); |
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197 }; |
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198 |
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199 reader.read; |
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200 } catch (NoFileException) { |
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201 // No user file exists; not an error. |
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202 } catch (Exception e) { |
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203 logger.error ("Error reading "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" prior to saving:"); |
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204 logger.error (e.msg); |
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205 logger.error ("Overwriting the file."); |
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206 // Continue... |
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207 } |
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208 loadUserFile = false; // don't need to do it again |
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209 } |
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210 |
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211 try { // Save |
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212 IWriter writer; |
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213 writer = confDir.makeMTWriter (fileName, changesDS); |
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214 writer.write; |
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215 } catch (Exception e) { |
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216 logger.error ("Saving to "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" failed:"); |
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217 logger.error (e.msg); |
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218 // No point in throwing since it doesn't affect anything else. |
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219 } |
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220 } |
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221 |
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222 /** Get the names of all designs available. */ |
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223 char[][] designs() { |
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224 synchronized(mutex) { |
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225 loadData (true); |
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226 return data.keys; |
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227 } |
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228 } |
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229 |
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230 |
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231 /** Create a widget by ID. */ |
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232 IChildWidget makeWidget (widgetID id) { |
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233 return createWidget (this, curData[id]); |
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234 } |
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235 |
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236 /** For making changes. */ |
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237 void setData (widgetID id, WidgetData d) { |
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238 changes[id] = d; // also updates WidgetDataSet in data. |
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239 } |
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240 |
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241 /** Second stage of loading the widgets. |
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242 * |
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243 * loadDesign handles the data; this method needs to: |
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244 * --- |
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245 * // 1. Create the root widget: |
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246 * child = makeWidget ("root"); |
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247 * // 2. Set the setSize, e.g.: |
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248 * child.setWidth (child.minWidth, 1); |
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249 * child.setHeight (child.minHeight, 1); |
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250 * --- |
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251 */ |
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252 // FIXME: abstract? |
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253 void createRootWidget(); |
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254 |
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255 protected: |
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256 final char[] fileName; |
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257 char[] defaultDesign; // The design specified in the file header. |
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258 char[] rendName; // Name of renderer; for saving and creating renderers |
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259 |
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260 // Loaded data, indexed by design name. May not be loaded for all gui designs: |
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261 scope WidgetDataSet[char[]] data; |
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262 private bool allLoaded = false; // applies to data |
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263 WidgetDataSet curData; // Current data |
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264 WidgetDataChanges changes; // Changes for the current design. |
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265 scope mt.DataSet changesDS; // changes and sections from user file (used for saving) |
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266 bool loadUserFile = true; // still need to load user file for saving? |
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267 |
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268 scope IChildWidget child; // The primary widget. |
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269 |
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270 Mutex mutex; // lock on methods for use outside the package. |
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271 } |
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272 |
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273 |
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274 package: |
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275 /************************************************************************************************* |
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276 * Contains data for all widgets in a GUI. |
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277 *************************************************************************************************/ |
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278 class WidgetDataSet : mt.IDataSection |
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279 { |
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280 //BEGIN Mergetag code |
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281 void addTag (char[] tp, mt.ID id, char[] dt) { |
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282 // Priority is HIGH_LOW. Only load tag if it doesn't already exist. |
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283 if (tp == "WidgetData" && (id in widgetData) is null) { |
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284 // Note: is a very simple form of struct deserialization |
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285 WidgetData data; |
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286 with(data) { |
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287 char[][] strs = split (dt); |
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288 if (strs.length != 2) |
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289 throw new ParseException ("Not two components"); |
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290 ints = parseTo!(int[]) (strs[0]); |
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291 strings = parseTo!(char[][]) (strs[1]); |
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292 } |
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293 widgetData[id] = data; |
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294 } |
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295 } |
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296 // Only WidgetDataChanges is used for writing. |
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297 void writeAll (ItemDelg dlg) {} |
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298 //END Mergetag code |
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299 |
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300 /** Get the widget data for widget i. */ |
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301 WidgetData opIndex (widgetID i) { |
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302 return widgetData[i]; |
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303 } |
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304 |
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305 // Per-widget data: |
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306 protected WidgetData[widgetID] widgetData; |
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307 } |
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308 |
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309 /************************************************************************************************* |
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310 * Contains changes to widget data. |
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311 * |
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312 * Can be read as normal and written. |
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313 *************************************************************************************************/ |
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314 class WidgetDataChanges : WidgetDataSet |
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315 { |
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316 /** |
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317 * Params: |
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318 * wds = The base WidgetDataSet these changes are applied against. */ |
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319 this (WidgetDataSet wds) { |
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320 base = wds; |
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321 } |
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322 |
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323 //BEGIN Mergetag code |
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324 // HIGH_LOW priority of addTag allows existing entries (i.e. the changes) to be preserved while |
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325 // other entries are read from files. |
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326 void writeAll (ItemDelg dlg) { |
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327 foreach (id,data; widgetData) { |
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328 // Note: is a very simple form of struct serialization |
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329 with(data) { |
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330 dlg ("WidgetData", id, |
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331 parseFrom!(int[]) (ints) ~ ',' ~ parseFrom!(char[][]) (strings) ); |
75
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332 } |
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333 } |
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334 } |
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335 //END Mergetag code |
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336 |
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337 /** Set the widget data for widget i. |
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338 */ |
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339 void opIndexAssign (WidgetData d, widgetID i) { |
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340 widgetData[i] = d; |
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341 base.widgetData[i] = d; |
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342 } |
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343 |
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344 /** Do any changes exist? True if no changes have been stored. */ |
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345 bool none () { |
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346 return widgetData.length == 0; |
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347 } |
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348 |
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349 protected WidgetDataSet base; |
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350 } |