annotate mde/gui/WidgetDataSet.d @ 81:d8fccaa45d5f

Moved file IO code from mde/mergetag to mde/file[/mergetag] and changed how some errors are caught.
author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 29 Aug 2008 11:59:43 +0100
parents ea58f277f487
children 4d5d53e4f881
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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.
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21 *
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22 * If any data requires changing, it is added to the WidgetDataChanges instance, which also
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23 * updates the the WidgetDataSet instance used to load the widgets (in case of a re-load from this
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24 * data). When the data should be saved, if the WidgetDataChanges instance is not empty, data from
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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.WidgetDataSet;
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30 public import mde.gui.types;
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32 // For loading from file:
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33 import mt = mde.file.mergetag.DataSet;
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34 import mt = mde.file.mergetag.DefaultData;
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35 import mde.file.serialize;
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36 import tango.util.log.Log : Log, Logger;
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38 private Logger logger;
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39 static this () {
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40 logger = Log.getLogger ("mde.gui.WidgetDataSet");
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41 }
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43 /*************************************************************************************************
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44 * Contains data for all widgets in a GUI.
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45 *************************************************************************************************/
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46 class WidgetDataSet : mt.IDataSection
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47 {
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48 //BEGIN Mergetag code
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49 void addTag (char[] tp, mt.ID id, char[] dt) {
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50 // Priority is HIGH_LOW. Only load tag if it doesn't already exist.
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51 if (tp == "WidgetData" && (id in widgetData) is null) {
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52 widgetData[id] = deserialize!(WidgetData) (dt);
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53 }
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54 }
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55 // Only WidgetDataChanges is used for writing.
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56 void writeAll (ItemDelg dlg) {}
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57 //END Mergetag code
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58
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59 /** Get the widget data for widget i. */
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60 WidgetData opIndex (widgetID id) {
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61 auto p = id in widgetData;
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62 if (p is null) {
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63 logger.error ("No data for widget "~id~"; creating a debug widget instead.");
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64 return WidgetData.dbg;
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65 }
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66 return *p;
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67 }
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69 // Per-widget data:
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70 protected WidgetData[widgetID] widgetData;
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71 }
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73 /*************************************************************************************************
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74 * Contains changes to widget data.
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75 *
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76 * Can be read as normal and written.
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77 *************************************************************************************************/
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78 class WidgetDataChanges : WidgetDataSet
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79 {
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80 /**
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81 * Params:
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82 * wds = The base WidgetDataSet these changes are applied against. */
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83 this (WidgetDataSet wds) {
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84 base = wds;
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85 }
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87 //BEGIN Mergetag code
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88 // HIGH_LOW priority of addTag allows existing entries (i.e. the changes) to be preserved while
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89 // other entries are read from files.
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90 void writeAll (ItemDelg dlg) {
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91 foreach (id,data; widgetData)
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92 dlg ("WidgetData", id, serialize!(WidgetData) (data));
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93 }
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94 //END Mergetag code
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95
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96 /** Set the widget data for widget i.
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97 */
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98 void opIndexAssign (WidgetData d, widgetID i) {
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99 widgetData[i] = d;
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100 base.widgetData[i] = d;
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101 }
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102
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103 /** Do any changes exist? True if no changes have been stored. */
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104 bool none () {
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105 return widgetData.length == 0;
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106 }
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107
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108 protected WidgetDataSet base;
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109 }