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annotate mde/content/AStringContent.d @ 119:d28aea50c6da

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Basic edit cursor placement using the mouse. Moved textContent.d's contents into TextWidget.d.
author Diggory Hardy <diggory.hardy@gmail.com>
date Thu, 01 Jan 2009 14:52:09 +0000
parents 1b1e2297e2fc
children d3b2cefd46c9
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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 − string-based editable content.
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17 */
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18 module mde.content.AStringContent;
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19 public import mde.content.Content;
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20
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21 //FIXME: efficient conversions? Need to dup result when formatting a string anyway?
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22 import Int = tango.text.convert.Integer;
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23 import Float = tango.text.convert.Float;
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24 import derelict.sdl.keysym;
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25
115
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26 import tango.util.log.Log : Log, Logger;
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27 private Logger logger;
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28 static this () {
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29 logger = Log.getLogger ("mde.content.AStringContent");
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30 }
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31
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32 // Used by Options
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33 template ContentN(T) {
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34 static if (is(T == bool)) {
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35 const char[] ContentN = "BoolContent";
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36 } else static if (is(T == int)) {
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37 const char[] ContentN = "IntContent";
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38 } else static if (is(T == double)) {
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39 const char[] ContentN = "DoubleContent";
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40 } else static if (is(T == char[])) {
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41 const char[] ContentN = "StringContent";
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42 } else
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43 static assert (false, "No Content of type "~T.stringof);
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44 }
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45
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46 /** Base class for content containing a simple value editable as text. All content types used by
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47 * Options extend this class.
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48 *
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49 * All derived classes should have the following functions:
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50 * ---
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51 * char[] endEdit (); // Should convert sv and assign to self, then call endEvent
105
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52 * // Used by Options:
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53 * BoolContent changeCb (void delegate (char[] symbol,T value) cb); // The callback used by Options
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54 * void assignNoCb (T val); // assign val, but without calling callbacks
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55 * ---
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56 * On any assignation (by this, assignNoCb, opAssign) the value should be converted to a string and
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57 * assigned to sv, and pos should be clamped to [0,sv.length] (i.e. enforce pos <= sv.length). */
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58 abstract class AStringContent : Content
105
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59 {
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60 protected this (char[] symbol) {
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61 super (symbol);
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62 }
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63
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64 /// Get the text.
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65 override char[] toString (uint i) {
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66 return i == 0 ? sv
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67 : i == 1 ? name_
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68 : i == 2 ? desc_
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69 : null;
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70 }
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71
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72 /** Acts on a keystroke and returns the new value.
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73 *
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74 * Supports one-line editing: left/right, home/end, backspace/delete. */
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75 char[] keyStroke (ushort sym, char[] i) {
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76 debug assert (i.length, "StringContent.keyStroke: no value (??)"); // impossible?
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77 char k = *i;
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78 if (k > 0x20) {
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79 if (k == 0x7f) { // delete
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80 size_t p = pos;
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81 if (p < sv.length) ++p;
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82 while (p < sv.length && (sv[p] & 0x80) && !(sv[p] & 0x40))
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83 ++p;
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84 sv = sv[0..pos] ~ sv[p..$];
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85 } else { // insert character
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86 char[] tail = sv[pos..$];
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87 sv.length = sv.length + i.length;
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88 size_t npos = pos+i.length;
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89 if (tail) sv[npos..$] = tail.dup; // cannot assign with overlapping ranges
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90 sv[pos..npos] = i;
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91 pos = npos;
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92 }
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93 } else { // use sym; many keys output 0
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94 if (sym == SDLK_BACKSPACE) { // backspace; k == 0x8
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95 char[] tail = sv[pos..$];
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96 if (pos) --pos;
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97 while (pos && (sv[pos] & 0x80) && !(sv[pos] & 0x40))
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98 --pos;
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99 sv = sv[0..pos] ~ tail;
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100 } else if (sym == SDLK_LEFT) {
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101 if (pos) --pos;
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102 while (pos && (sv[pos] & 0x80) && !(sv[pos] & 0x40))
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103 --pos;
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104 } else if (sym == SDLK_RIGHT) {
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105 if (pos < sv.length) ++pos;
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106 while (pos < sv.length && (sv[pos] & 0x80) && !(sv[pos] & 0x40))
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107 ++pos;
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108 } else if (sym == SDLK_HOME || sym == SDLK_UP) {
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109 pos = 0;
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110 } else if (sym == SDLK_END || sym == SDLK_DOWN) {
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111 pos = sv.length;
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112 } else
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113 debug logger.trace ("Unhandled symbol: {}", sym);
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114 }
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115 return sv;
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116 }
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117
119
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118 /** Get the character the edit cursor is in front of.
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119 *
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120 * NOTE: unused. */
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121 size_t editIndex () {
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122 size_t i = 0;
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123 for (size_t p = 0; p < pos; ++p)
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124 if (!(sv[p] & 0x80) || sv[p] & 0x40)
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125 ++i;
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126 return i;
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127 }
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128 /** Set the edit position in front of i'th character.
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129 *
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130 * Assumes at least i characters are present; if not this will work but not be optimal. */
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131 void editIndex (size_t i) {
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132 pos = 0;
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133 for (; i > 0; --i) { // NOTE: could be slightly optimised
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parents: 115
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134 if (pos < sv.length) ++pos;
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 115
diff changeset
135 while (pos < sv.length && (sv[pos] & 0x80) && !(sv[pos] & 0x40))
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 115
diff changeset
136 ++pos;
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Diggory Hardy <diggory.hardy@gmail.com>
parents: 115
diff changeset
137 }
d28aea50c6da Basic edit cursor placement using the mouse.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 115
diff changeset
138 }
105
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139
112
fe061009029d EnumContent; log level can be selected from a popup list.
Diggory Hardy <diggory.hardy@gmail.com>
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140 /** Call after editing a string; return new string (may be changed/reverted). */
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parents: 105
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141 char[] endEdit ();
105
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142
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143 protected:
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144 char[] sv; // string of value; updated on assignment for displaying and editing
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145 size_t pos; // editing position; used by keyStroke
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parents:
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146 }
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147
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148 class BoolContent : AStringContent
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149 {
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150 /** Create a content with _symbol name symbol. */
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parents:
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151 this (char[] symbol, bool val = false) {
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152 assignNoCb (val);
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153 super (symbol);
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154 }
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155
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156 void assignNoCb (bool val) {
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157 v = val;
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Diggory Hardy <diggory.hardy@gmail.com>
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158 sv = v ? "true" : "false";
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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159 if (pos > sv.length) pos = sv.length;
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160 }
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Diggory Hardy <diggory.hardy@gmail.com>
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161 void opAssign (bool val) {
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162 assignNoCb (val);
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163 endEvent;
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164 }
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165 bool opCall () {
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166 return v;
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167 }
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168 alias opCall opCast;
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169
112
fe061009029d EnumContent; log level can be selected from a popup list.
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170 override char[] endEdit () {
105
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171 v = sv && (sv[0] == 't' || sv[0] == 'T' || sv[0] == '1');
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172 endEvent;
112
fe061009029d EnumContent; log level can be selected from a popup list.
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173 return sv;
105
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174 }
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175
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176 protected:
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177 bool v;
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178 }
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179
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180 /** Text content. */
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181 class StringContent : AStringContent
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182 {
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183 this (char[] symbol, char[] val = null) {
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184 v = val;
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185 super (symbol);
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186 }
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187
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188 void assignNoCb (char[] val) {
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Diggory Hardy <diggory.hardy@gmail.com>
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189 v = val;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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190 if (pos > sv.length) pos = sv.length;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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191 }
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Diggory Hardy <diggory.hardy@gmail.com>
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192 void opAssign (char[] val) {
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Diggory Hardy <diggory.hardy@gmail.com>
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193 assignNoCb (val);
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194 endEvent;
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195 }
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196 char[] opCall () {
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197 return v;
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198 }
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199 alias opCall opCast;
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200
112
fe061009029d EnumContent; log level can be selected from a popup list.
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parents: 105
diff changeset
201 override char[] endEdit () {
105
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202 endEvent;
112
fe061009029d EnumContent; log level can be selected from a popup list.
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diff changeset
203 return sv;
105
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204 }
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parents:
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205
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206 protected:
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207 alias sv v; // don't need separate v and sv in this case
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parents:
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208 }
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parents:
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209
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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210 /** Integer content. */
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parents:
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211 class IntContent : AStringContent
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parents:
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212 {
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parents:
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213 /** Create a content with _symbol name symbol. */
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
214 this (char[] symbol, int val = 0) {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
215 assignNoCb (val);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
216 super (symbol);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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217 }
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parents:
diff changeset
218
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parents:
diff changeset
219 void assignNoCb (int val) {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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220 v = val;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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221 sv = Int.toString (v);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
222 if (pos > sv.length) pos = sv.length;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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223 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
224 void opAssign (int val) {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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225 assignNoCb (val);
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226 endEvent;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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227 }
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parents:
diff changeset
228 int opCall () {
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229 return v;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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230 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
231 alias opCall opCast;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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232
112
fe061009029d EnumContent; log level can be selected from a popup list.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 105
diff changeset
233 override char[] endEdit () {
105
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
234 v = Int.toInt (sv);
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Diggory Hardy <diggory.hardy@gmail.com>
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diff changeset
235 endEvent;
112
fe061009029d EnumContent; log level can be selected from a popup list.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 105
diff changeset
236 return sv;
105
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parents:
diff changeset
237 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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238
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parents:
diff changeset
239 protected:
115
1b1e2297e2fc Enums handled more generically now via either a popup list or flat list of BoolContentWidgets.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 112
diff changeset
240 int v = 0; // must be a valid value for EnumContent (i.e. 0)
105
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
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241 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
242
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
243 /** Double content. */
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
244 class DoubleContent : AStringContent
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
245 {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
246 /** Create a content with _symbol name symbol. */
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
247 this (char[] symbol, double val = 0) {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
248 assignNoCb (val);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
249 super (symbol);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
250 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
251
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
252 void assignNoCb (double val) {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
253 v = val;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
254 sv = Float.toString (v);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
255 if (pos > sv.length) pos = sv.length;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
256 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
257 void opAssign (double val) {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
258 assignNoCb (val);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
259 endEvent;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
260 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
261 double opCall () {
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
262 return v;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
263 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
264 alias opCall opCast;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
265
112
fe061009029d EnumContent; log level can be selected from a popup list.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 105
diff changeset
266 override char[] endEdit () {
105
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
267 v = Float.toFloat (sv);
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
268 endEvent;
112
fe061009029d EnumContent; log level can be selected from a popup list.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 105
diff changeset
269 return sv;
105
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parents:
diff changeset
270 }
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
271
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parents:
diff changeset
272 protected:
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
273 double v;
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Diggory Hardy <diggory.hardy@gmail.com>
parents:
diff changeset
274 }
112
fe061009029d EnumContent; log level can be selected from a popup list.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 105
diff changeset
275
115
1b1e2297e2fc Enums handled more generically now via either a popup list or flat list of BoolContentWidgets.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 112
diff changeset
276 /** A content representing an enumeration.
1b1e2297e2fc Enums handled more generically now via either a popup list or flat list of BoolContentWidgets.
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parents: 112
diff changeset
277 *
1b1e2297e2fc Enums handled more generically now via either a popup list or flat list of BoolContentWidgets.
Diggory Hardy <diggory.hardy@gmail.com>
parents: 112
diff changeset
278 * Extends IntContent for Options support. */
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279 // maybe avoid problems by adding a special callback to BoolContent subclass?
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280 class EnumContent : IntContent, IContentList
112
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281 {
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282 /** CTOR.
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283 *
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284 * Params:
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285 * enumSymbols = Symbol names for each
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286 * val = which value is active; must be in [0,length-1]
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287 */
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288 this (char[] symbol, char[][] enumSymbols, int val = 0) {
115
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289 enums.length = enumSymbols.length;
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290 foreach (i, ref e; enums) {
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291 e = new BoolContent (enumSymbols[i], false);
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292 e.addCallback (&enumAssignCb);
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293 }
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294 super (symbol, val);
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295 //NOTE: if val is 0, no enumeration should be set; however it seems to work!
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296 }
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297
115
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298 override void assignNoCb (int val) {
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299 if (val == v) return;
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300 if (val >= enums.length || val < 0) {
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301 logger.error ("EnumContent "~name_~" assigned invalid value; keeping value: "~sv);
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302 return;
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303 }
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304 enums[v] = false;
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305 enums[val] = true;
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306 v = val;
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307 svAssign;
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308 }
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309 void svAssign () {
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310 sv = enums[v].name_;
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311 if (pos > sv.length) pos = sv.length;
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312 endEvent;
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313 }
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314
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315 override char[] endEdit () {
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316 foreach (i,e; enums)
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317 if (sv == e.name_) {
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318 v = i;
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319 goto break1;
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320 }
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321
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322 sv = enums[v].name_; // sv was edited; revert
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323 logger.error ("EnumContent "~name_~" assigned invalid value; keeping value: "~sv);
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324 if (pos > sv.length) pos = sv.length;
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325
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326 break1:
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327 endEvent;
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328 return sv;
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329 }
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330
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331 override Content[] list () {
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332 return enums;
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333 }
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334
112
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335 protected:
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336 void enumAssignCb (Content c) {
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337 if (enums[v] is c) { // No other is set so persist value
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338 enums[v].assignNoCb (true);
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339 }
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340 foreach (i,e; enums)
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341 if (c is e) {
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342 enums[v].assignNoCb = false; // NOTE: opAssign causes sigsegv (due to recursive calling?)
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343 v = i;
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344 svAssign;
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345 return;
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346 }
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347 debug logger.error ("EnumContent.enumAssignCb: invalid value (code error)");
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348 }
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349
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350 BoolContent[] enums; // NOTE: an array isn't always fastest
112
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351 }