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Fixed a bug where (non-resizible) widgets wouldn't get shrunk when minimal size decreases, meaning optional context menus are hiden properly now. Optimised when ServiceContentList.opCall is called, I think without breaking anything.
author Diggory Hardy <diggory.hardy@gmail.com>
date Tue, 15 Sep 2009 20:09:59 +0200
parents a1ba9157510e
children
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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 © 2007-2009 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 /** Content services.
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17 *
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18 * Each is a Content, so it can be used in a menu. Since the content being
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19 * acted on is not passed when functions are called like this, it is set when
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20 * a context menu is opened, which also allows the services to specify their
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21 * compatibility with the content (type) passed (via BoolContent value and
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22 * callbacks).
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23 */
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24 module mde.content.ServiceContent;
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25
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26 import mde.content.AStringContent;
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27
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28 debug {
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29 import tango.util.log.Log : Log, Logger;
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30 private Logger logger;
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31 static this () {
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32 logger = Log.getLogger ("mde.gui.content.ServiceContent");
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33 }
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34 }
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35
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36 /** Interface for ServiceContent and ServiceContentList.
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37 *
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38 * When the value changes, needs to call callbacks from collapsible widgets and
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39 * the like, to show/hide the button.
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40 *
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41 * When ServiceContent buttons are pressed, they need to call event callbacks,
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42 * doing the service. */
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43 interface IServiceContent : IContent {
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44 void setContent (Content cont);
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45 }
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46
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47 /** A class for services acting on content.
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48 *
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49 * Provides services for any content usable as type T, where T is some content
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50 * type.
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51 *
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52 * The (boolean) value is true to indicate this service can act on the passed
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53 * content type, false if not. */
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54 class ServiceContent(T : Content = AStringContent) : Content, IServiceContent, IBoolContent, IEventContent {
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55 this (char[] symbol) {
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56 super (symbol);
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57 }
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58
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59 /** Pass the content this service should prepare for.
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60 *
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61 * Stores the reference, because it won't be passed later. */
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62 override void setContent (Content cont) {
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63 T oCont = activeCont;
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64 activeCont = cast(T)cont;
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65 if ((oCont !is null) != (activeCont !is null)) {
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66 logger.trace ("00");
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67 endEvent;
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68 logger.trace ("01");
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69 }
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70 }
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71
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72 override bool opCall () {
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73 debug logger.trace ("ServiceContent.opCall: {}", symbol);
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74 return activeCont !is null;
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75 }
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76 // Doesn't support directly setting the value
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77 override void opAssign (bool val) {}
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78
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79 package:
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80 T activeCont;
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81 }
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82
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83 /** Aliases for common types */
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84 alias ServiceContent!(AStringContent) AStringService;
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85 alias ServiceContent!(IntContent) IntService; ///ditto
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86
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87 /** A generic way to handle a list of type IContent. */
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88 class ServiceContentList : ContentList, IServiceContent, IBoolContent
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89 {
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90 this (char[] symbol) {
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91 super (symbol);
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92 foreach (child; list_) {
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93 if ((cast(IBoolContent)child)()) {
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94 v = true;
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95 break;
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96 }
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97 }
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98 endEvent;
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99 }
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100
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101 void setContent (Content cont) {
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102 foreach (child; list_) {
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103 (cast(IServiceContent)child).setContent (cont);
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104 }
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105 bool ov = v;
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106 v = false;
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107 foreach (child; list_) {
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108 if ((cast(IBoolContent)child)()) {
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109 v = true;
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110 break;
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111 }
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112 }
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113 if (v != ov) {
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114 debug logger.trace ("ServiceContentList.endEvent");
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115 endEvent;
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116 }
170
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117 }
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118
173
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119 override void append (Content x) {
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120 assert (cast(IBoolContent) x, "Only IBoolContent children are allowed!");
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121 list_ ~= x;
179
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122 //NOTE: this should only ever be changed when setContent is called and after creation
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123 //x.addCallback (&childChangeCB);
173
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124 }
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125
170
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126 override bool opCall () {
179
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127 debug logger.trace ("ServiceContentList.opCall: {}", symbol);
173
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128 return v;
170
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129 }
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130 // Doesn't support directly setting the value
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131 override void opAssign (bool val) {}
171
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132
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133
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134 /** Create all services.
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135 *
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136 * Each WidgetManager has it's own instance, but these share one clipboard, etc.
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137 *
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138 * Currently all clipboard operations convert to/from a string.
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139 * TODO: Possible extensions: multi-item clipboard displaying value in menu,
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140 * copying without converting everything to/from a string. */
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141 static ServiceContentList createItems (char[] name) {
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142 char[] lName = "menus.services."~name;
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143 auto ret = new ServiceContentList (lName);
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144
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145 // Many use callbacks on a generic class type. For this, we should be sure of the type.
173
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146 (new AStringService(lName~".copy")).addCallback (delegate void(IContent c) {
171
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147 debug assert (cast(AStringService)c);
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148 with (cast(AStringService)c) {
179
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149 if (activeCont !is null) {
171
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150 clipboard = activeCont.toString(0);
179
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151 debug logger.trace ("set clipboard to \"{}\"", clipboard);
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152 }
171
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153 }
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154 });
173
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155 (new AStringService(lName~".paste")).addCallback (delegate void(IContent c) {
171
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156 debug assert (cast(AStringService)c);
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157 with (cast(AStringService)c) {
179
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158 if (activeCont !is null) {
171
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159 activeCont = clipboard;
179
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160 debug logger.trace ("assigned from clipboard: \"{}\"", activeCont.toString(0));
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161 }
171
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162 }
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163 });
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164
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165 new ServiceContentList(lName~".calculator");
173
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166 (new IntService(lName~".calculator.increment")).addCallback (delegate void(IContent c) {
171
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167 debug assert (cast(IntService)c);
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168 with (cast(IntService)c) {
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169 if (activeCont !is null)
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170 activeCont = activeCont()+1;
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171 }
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172 });
173
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173 (new IntService(lName~".calculator.decrement")).addCallback (delegate void(IContent c) {
171
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174 debug assert (cast(IntService)c);
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175 with (cast(IntService)c) {
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176 if (activeCont !is null)
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177 activeCont = activeCont()-1;
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178 }
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179 });
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180 return ret;
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181 }
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182
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183 private:
179
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184 /+NOTE: trying a different method
173
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185 void childChangeCB (IContent icont) {
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186 if (v == false) { // then value changes iff icont()
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187 debug assert (cast(IBoolContent) icont);
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188 if ((cast(IBoolContent) icont)()) {
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189 v = true;
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190 endEvent;
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191 }
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192 } else { // we must check all children
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193 v = false;
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194 foreach (child; list_) {
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195 if ((cast(IBoolContent)child)()) {
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196 v = true;
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197 break;
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198 }
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199 }
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200 if (!v)
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201 endEvent;
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202 }
179
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203 }+/
173
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204
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205 bool v = false; // cache value so we can see when it changes
171
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206 static char[] clipboard;
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207 //TODO: lock on clipboard: static Mutex mutex;
61
7cab2af4ba21 A little bit of progress on the content handling system (relevent code is likely to be revised).
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208 }