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annotate mde/gui/content/Content.d @ 98:49e7cfed4b34

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All types of Option have been converted to use ValueContent classes, and their values can be displayed.
author Diggory Hardy <diggory.hardy@gmail.com>
date Wed, 12 Nov 2008 13:18:51 +0000
parents 2a364c7d82c9
children 5de5810e3516
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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 /** The content system − common types.
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17 */
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18 module mde.gui.content.Content;
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19
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20 //FIXME: efficient conversions? Need to dup result when formatting a string anyway?
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21 import Int = tango.text.convert.Integer;
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22 import Float = tango.text.convert.Float;
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23
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24 debug {
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25 import tango.util.log.Log : Log, Logger;
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26 private Logger logger;
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27 static this () {
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28 logger = Log.getLogger ("mde.gui.content.Content");
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29 }
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30 }
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31
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32 /** IContent − interface for all Content classes.
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33 *
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34 * Services like copy/paste could work on universal content. However, they would need to run a
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35 * conversion to the appropriate type (or try next-oldest item on clipboard?).
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36 *
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37 * Currently Content instances can only have their data set on creation.
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38 * Each Content class should provide a method to get it's content, e.g. the method text().
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39 *
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40 * Extensions to content:
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41 *
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42 * These extensions require that a content can notify any dependants of changes.
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43 *
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44 * Use as a state switch (one option from an enumeration). E.g. a button/selection box could set a
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45 * state, and a tabbed box could show a tab based on this. Or could represent an option.
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46 */
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47 //TODO - write a generic IContent displaying widget. Also a generic editable?
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48 // Don't include dimension/drawing stuff because it's renderer specific and content should not be!
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49 // NOTE: an interface or a class?
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50 interface IContent
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51 {
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52 /+ NOTE: None of this is really used yet, but was (mostly) intended for clipboard copying.
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53 /** Return a copy of self. */
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54 IContent dup ();
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55
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56 /** Attempt to convert the content to a specific type (may simply return this if appropriate).
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57 *
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58 * Annoyingly we can't use cast because overloading by return type isn't supported. */
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59 // FIXME: throw or return null on error or unsupported conversion?
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60 ContentText toText ();
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61 ContentInt toInt (); /// ditto
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62 +/
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66 /** Generically return strings.
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67 *
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68 * This serves two purposes: generically returning a string of/related to the content (i == 0),
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69 * and returning associated descriptors. Functions should adhere to (or add to) this table.
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70 *
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71 * $(TABLE
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72 * $(TR $(TH i) $(TH returns))
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73 * $(TR $(TD 0) $(TD value))
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74 * $(TR $(TD 1) $(TD Translated name or null))
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75 * $(TR $(TD 2) $(TD Translated description or null))
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76 * $(TR $(TD other) $(TD null))
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77 * ) */
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78 char[] toString (uint i);
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79 }
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80
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81 /** Base class for content containing a simple value.
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82 *
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83 * All derived classes should support functions to set/get any ValueContent type, but return the
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84 * default value of any type other than it's own. */
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85 abstract class ValueContent : IContent
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86 {
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87 protected this () {}
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88
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89 void name (char[] n, char[] d = null) {
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90 name_ = n;
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91 desc_ = d;
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92 }
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93 protected:
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94 char[] name_, desc_;// name and description, loaded by lookup.Translation
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95 }
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96
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97 template VContentN(T) {
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98 static if (is(T == bool)) {
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99 const char[] VContentN = "BoolContent";
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100 } else static if (is(T == int)) {
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101 const char[] VContentN = "IntContent";
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102 } else static if (is(T == double)) {
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103 const char[] VContentN = "DoubleContent";
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104 } else static if (is(T == char[])) {
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105 const char[] VContentN = "TextContent";
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106 } else
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107 static assert (false, "No ValueContent of type "~T.stringof);
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108 }
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109
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110 class BoolContent : ValueContent
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111 {
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112 /** Create a content with _symbol name symbol. */
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113 this (char[] symbol, bool val = false) {
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114 symb = symbol;
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115 v = val;
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116 }
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117
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118 /** Adds cb to the list of callback functions called when the value is changed. Returns this. */
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119 BoolContent addChangeCb (void delegate (char[] symbol,bool value) cb) {
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120 cngCb ~= cb;
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121 return this;
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122 }
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123
94
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124 /// Get the text.
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125 char[] toString (uint i) {
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126 return (i == 0) ? v ? "true" : "false"
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127 : (i == 1) ? name_
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128 : (i == 2) ? desc_
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129 : null;
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130 }
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131
94
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132 void opAssign (bool val) {
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133 v = val;
95
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134 foreach (cb; cngCb)
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135 cb(symb, val);
94
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136 }
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137 bool opCall () {
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138 return v;
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139 }
98
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140 alias opCall opCast;
94
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141
95
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142 bool v; //FIXME: should be protected but Options needs to set without calling callbacks
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143 protected:
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144 char[] symb;
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145 void delegate (char[],bool)[] cngCb; // change callbacks
94
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146 }
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147
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148 /** Text content. */
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149 class TextContent : ValueContent
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150 {
98
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151 this (char[] symbol, char[] val = null) {
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152 symb = symbol;
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153 v = val;
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154 }
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155
98
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156 /** Adds cb to the list of callback functions called when the value is changed. Returns this. */
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157 TextContent addChangeCb (void delegate (char[] symbol,char[] value) cb) {
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158 cngCb ~= cb;
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159 return this;
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160 }
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161
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162 /// Get the text.
94
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163 char[] toString (uint i) {
98
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164 return (i == 0) ? v
94
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165 : (i == 1) ? name_
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166 : (i == 2) ? desc_
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167 : null;
61
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168 }
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169
98
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diff changeset
170 void opAssign (char[] val) {
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171 v = val;
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172 foreach (cb; cngCb)
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173 cb(symb, val);
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174 }
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175 char[] opCall () {
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176 return v;
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177 }
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178 alias opCall opCast;
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179
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180 char[] v;
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181 protected:
98
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182 char[] symb;
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183 void delegate (char[],char[])[] cngCb;
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184 }
98
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185
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186 /** Integer content. */
98
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187 class IntContent : ValueContent
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188 {
98
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189 /** Create a content with _symbol name symbol. */
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190 this (char[] symbol, int val = 0) {
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191 symb = symbol;
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192 v = val;
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193 }
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194
98
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195 /** Adds cb to the list of callback functions called when the value is changed. Returns this. */
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196 IntContent addChangeCb (void delegate (char[] symbol,int value) cb) {
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197 cngCb ~= cb;
61
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198 return this;
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199 }
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200
98
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201 /// Get the text.
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202 char[] toString (uint i) {
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203 return (i == 0) ? Int.toString (v)
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204 : (i == 1) ? name_
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205 : (i == 2) ? desc_
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206 : null;
61
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207 }
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208
98
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209 void opAssign (int val) {
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210 v = val;
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211 foreach (cb; cngCb)
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212 cb(symb, val);
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213 }
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diff changeset
214 int opCall () {
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215 return v;
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216 }
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diff changeset
217 alias opCall opCast;
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218
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diff changeset
219 int v;
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220 protected:
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diff changeset
221 char[] symb;
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diff changeset
222 void delegate (char[],int)[] cngCb;
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223 }
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diff changeset
224
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diff changeset
225 /** Double content. */
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diff changeset
226 class DoubleContent : ValueContent
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227 {
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diff changeset
228 /** Create a content with _symbol name symbol. */
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229 this (char[] symbol, double val = 0) {
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diff changeset
230 symb = symbol;
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diff changeset
231 v = val;
61
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232 }
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233
98
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diff changeset
234 /** Adds cb to the list of callback functions called when the value is changed. Returns this. */
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diff changeset
235 DoubleContent addChangeCb (void delegate (char[] symbol,double value) cb) {
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diff changeset
236 cngCb ~= cb;
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diff changeset
237 return this;
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diff changeset
238 }
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parents: 95
diff changeset
239
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diff changeset
240 /// Get the text.
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diff changeset
241 char[] toString (uint i) {
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242 return (i == 0) ? Float.toString (v)
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243 : (i == 1) ? name_
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244 : (i == 2) ? desc_
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245 : null;
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246 }
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247
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248 void opAssign (double val) {
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249 v = val;
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250 foreach (cb; cngCb)
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251 cb(symb, val);
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252 }
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253 double opCall () {
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254 return v;
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255 }
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256 alias opCall opCast;
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257
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258 double v;
61
7cab2af4ba21 A little bit of progress on the content handling system (relevent code is likely to be revised).
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parents:
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259 protected:
98
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260 char[] symb;
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261 void delegate (char[],double)[] cngCb;
61
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262 }