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annotate mde/gui/widget/AParentWidget.d @ 133:9fd705793568

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Fixed menu popup bug, improved recursion detection. Menu popups can now determine whether or not they are sub-menus. Recursion detection can now also check content (if not the same, there's not a risk of infinite recursion).
author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 23 Jan 2009 16:05:05 +0000
parents 9cff74f68b84
children 9f035cd139c6
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131
9cff74f68b84 Major revisions to popup handling. Buttons can close menus now, plus some smaller impovements. Removed Widget module.
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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 * This module contains base widget classes for parent widgets.
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18 *
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19 * Abstract widget classes have an 'A' prepended to the name, similar to the
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20 * 'I' convention for interfaces.
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21 *****************************************************************************/
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22 module mde.gui.widget.AParentWidget;
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23
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24 public import mde.gui.widget.AChildWidget;
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25 import mde.gui.exception;
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26 import mde.content.Content;
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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.widget.AParentWidget");
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33 }
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34 }
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35
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36 /******************************************************************************
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37 * Abstract base widget classes to facilitate parent widgets.
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38 *
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39 * To improve code sharing, there's no separate version for parents taking a
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40 * single subwidget.
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41 *
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42 * Parent widgets probably need to overload these functions (from AChildWidget):
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43 * setup, saveChanges, setPosition, getWidget, draw, setWidth and setHeight.
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44 *****************************************************************************/
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45 abstract class AParentWidget : AChildWidget, IParentWidget
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46 {
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47 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) {
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48 super (mgr, parent, id);
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49 }
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50
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51 override bool setup (uint n, uint flags) {
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52 debug (mdeWidgets) logger.trace ("AParentWidget.setup");
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53 bool c = false;
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54 foreach (w; subWidgets) {
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55 debug assert (w, "AParentWidget: w is null");
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56 c |= w.setup (n,flags);
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57 }
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58 return c;
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59 }
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60
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61 override bool saveChanges () {
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62 bool c = false;
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63 foreach (w; subWidgets)
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64 c |= w.saveChanges;
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65 return c;
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66 }
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67
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68 size_t getWidgetIndex (IChildWidget widg) {
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69 foreach (i,w; subWidgets)
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70 if (w is widg)
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71 return i;
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72
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73 throw new GuiException ("getWidgetIndex: widget not found (code error)");
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74 }
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75
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76 // Parents taking a content should override, only throwing if both the
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77 // widget id and the content are the same (as its it and content).
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78 override void recursionCheck (widgetID wID, IContent c) {
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79 debug assert (id !is null && parent !is null, "recursionCheck called before parent and id set");
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80 if (wID is id)
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81 throw new WidgetRecursionException (wID);
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82 parent.recursionCheck (wID, c);
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83 }
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84
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85 IPopupParentWidget getParentIPPW () {
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86 return parent.getParentIPPW;
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87 }
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88
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89 // Most parent widgets need to implement these, although not all
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90 void minWChange (IChildWidget widget, wdim mw) {}
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91 void minHChange (IChildWidget widget, wdim mh) {}
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92
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93 debug override void logWidgetSize () {
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94 super.logWidgetSize;
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95 foreach (widg; subWidgets)
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96 widg.logWidgetSize;
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97 }
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98
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99 protected:
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100 IChildWidget[] subWidgets;
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101 }
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102
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103
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104 /******************************************************************************
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105 * Base code for implementing IPopupParentWidget.
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106 *
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107 * The current intention is that an IPPW (excluding the widget manager) may
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108 * only have one popup; this class follows this intention.
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109 *****************************************************************************/
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110 abstract class APopupParentWidget : AParentWidget, IPopupParentWidget
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111 {
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112 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) {
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113 super (mgr, parent, id);
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114
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115 parentIPPW = parent.getParentIPPW;
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116 }
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117
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118 override IPopupParentWidget getParentIPPW () {
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119 return this;
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120 }
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121
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122 override void addChildIPPW (IPopupParentWidget ippw) {
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123 if (childIPPW)
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124 childIPPW.removedIPPW;
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125 childIPPW = ippw;
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126 mgr.requestRedraw;
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127 }
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128 override bool removeChildIPPW (IPopupParentWidget ippw) {
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129 if (childIPPW !is ippw) return false;
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130 childIPPW.removedIPPW;
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131 childIPPW = null;
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132 mgr.requestRedraw;
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133 mAIPPW = false;
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134 return true;
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135 }
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136
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137 // If this function is overriden, you MUST still call it (super.removedIPPW)!
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138 // Or invariant will throw assert errors.
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139 override void removedIPPW () {
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140 if (childIPPW) {
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141 childIPPW.removedIPPW;
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142 childIPPW = null;
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143 }
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144 mAIPPW = false;
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145 }
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146
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147 override void menuActive (bool mA) {
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148 mAIPPW = mA;
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149 if (childIPPW)
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150 childIPPW.menuActive = mA;
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151 }
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152 override bool menuActive () {
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153 return mAIPPW;
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154 }
133
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155 override bool parentMenuActive () {
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156 return parentIPPW.menuActive;
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157 }
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158
131
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159 override void menuDone () { // default actions, for popup menus:
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160 parentIPPW.removeChildIPPW (this); // remove self
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161 parentIPPW.menuDone; // and propegate
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162 }
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163
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164 override IChildWidget getPopupWidget (wdabs cx, wdabs cy, bool closePopup) {
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165 IChildWidget ret;
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166 if (childIPPW) {
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167 ret = childIPPW.getPopupWidget (cx, cy, closePopup);
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168 if (closePopup && ret is null) {
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169 menuActive = false;
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170 removeChildIPPW (childIPPW);
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171 }
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172 }
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173 if (ret is null) {
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174 if (popup.onSelf (cx, cy))
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175 ret = popup.getWidget (cx, cy);
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176 else if (onSelf (cx, cy))
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177 ret = getWidget (cx, cy);
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178 }
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179 return ret;
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180 }
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181
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182 override void drawPopup () {
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183 popup.draw;
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184 if (childIPPW)
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185 childIPPW.drawPopup;
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186 }
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187
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188 debug invariant () {
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189 // True as long as removedIPPW gets called:
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190 if (!parentIPPW.isChild (this)) {
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191 assert (childIPPW is null, "APPW: childIPPW");
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192 assert (mAIPPW is false, "APPW: mAIPPW");
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193 }
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194 }
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195
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196 protected:
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197 // How to activate a popup:
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198 /+void activatePopup (IChildWidget widget) {
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199 parentIPPW.addChildIPPW (this);
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200 popup = widget;
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201 mgr.positionPopup (this, popup);
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202 }+/
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203
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204 debug override bool isChild (IPopupParentWidget ippw) {
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205 return ippw is childIPPW;
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206 }
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207
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208 IPopupParentWidget parentIPPW;
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209 IPopupParentWidget childIPPW;
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210 IChildWidget popup;
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211 bool mAIPPW;
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212 }