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annotate mde/gui/widget/AParentWidget.d @ 174:3d58adc17d20

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author Diggory Hardy <diggory.hardy@gmail.com>
date Mon, 31 Aug 2009 13:54:23 +0200
parents a1ba9157510e
children af40e9679436
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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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24 public import mde.gui.widget.AChildWidget;
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25 import mde.gui.exception;
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26 import mde.content.IContent;
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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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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 public 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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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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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 id and content).
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78 public 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 public override IPopupParentWidget getParentIPPW () {
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86 return parent.getParentIPPW;
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87 }
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89 // Most parent widgets need to implement these, although not all
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90 // They must at a minimum make sure widget's size is at least nmw by nmh.
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91 public override void minWChange (IChildWidget widget, wdim nmw) {
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92 if (widget.width < nmw)
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93 widget.setWidth (nmw, -1);
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94 }
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95 public override void minHChange (IChildWidget widget, wdim nmh) {
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96 if (widget.height < nmh)
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97 widget.setHeight (nmh, -1);
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98 }
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99
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100 debug public override void logWidgetSize () {
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101 super.logWidgetSize;
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102 foreach (widg; subWidgets)
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103 widg.logWidgetSize;
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104 }
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105
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106 protected:
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107 IChildWidget[] subWidgets;
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108 }
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109
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110
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111 /******************************************************************************
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112 * Base code for implementing IPopupParentWidget.
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113 *
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114 * The current intention is that an IPPW (excluding the widget manager) may
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115 * only have one popup; this class follows this intention.
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116 *****************************************************************************/
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117 abstract class APopupParentWidget : AParentWidget, IPopupParentWidget
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118 {
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119 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) {
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120 super (mgr, parent, id);
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121
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122 parentIPPW = parent.getParentIPPW;
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123 }
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124
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125 override IPopupParentWidget getParentIPPW () {
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126 return this;
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127 }
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128
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129 override void addChildIPPW (IPopupParentWidget ippw) {
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130 if (childIPPW)
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131 childIPPW.removedIPPW;
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132 childIPPW = ippw;
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133 mgr.requestRedraw;
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134 }
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135 override bool removeChildIPPW (IPopupParentWidget ippw) {
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136 if (childIPPW !is ippw) return false;
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137 childIPPW.removedIPPW;
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138 childIPPW = null;
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139 mgr.requestRedraw;
152
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140 mAIPPW = MenuPosition.INACTIVE;
131
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141 return true;
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142 }
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143
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144 // If this function is overriden, you MUST still call it (super.removedIPPW)!
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145 // Or invariant will throw assert errors.
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146 override void removedIPPW () {
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147 if (childIPPW) {
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148 childIPPW.removedIPPW;
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149 childIPPW = null;
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150 }
152
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151 mAIPPW = MenuPosition.INACTIVE;
131
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152 }
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153
152
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154 override void menuActive (MenuPosition mA) {
131
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155 mAIPPW = mA;
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156 if (childIPPW)
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157 childIPPW.menuActive = mA;
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158 }
152
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159 override MenuPosition menuActive () {
131
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160 return mAIPPW;
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161 }
152
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162 override MenuPosition parentMenuActive () {
133
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163 return parentIPPW.menuActive;
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164 }
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165
131
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166 override void menuDone () { // default actions, for popup menus:
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167 parentIPPW.removeChildIPPW (this); // remove self
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168 parentIPPW.menuDone; // and propegate
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169 }
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170
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171 override IChildWidget getPopupWidget (wdabs cx, wdabs cy, bool closePopup) {
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172 IChildWidget ret;
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173 if (childIPPW) {
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174 ret = childIPPW.getPopupWidget (cx, cy, closePopup);
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175 if (closePopup && ret is null) {
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176 removeChildIPPW (childIPPW);
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177 }
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178 }
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179 if (ret is null) {
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180 if (popup.onSelf (cx, cy))
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181 ret = popup.getWidget (cx, cy);
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182 else if (onSelf (cx, cy))
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183 ret = getWidget (cx, cy);
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184 }
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185 return ret;
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186 }
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187
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188 override void drawPopup () {
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189 popup.draw;
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190 if (childIPPW)
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191 childIPPW.drawPopup;
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192 }
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193
174
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194 debug invariant {
131
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195 // True as long as removedIPPW gets called:
174
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196 /+TODO:
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197 if (!parentIPPW.isChild (this)) {
131
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198 assert (childIPPW is null, "APPW: childIPPW");
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199 assert (mAIPPW is false, "APPW: mAIPPW");
174
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200 }+/
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201 }
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202
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203 debug override bool isChild (IPopupParentWidget ippw) {
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204 return ippw is childIPPW;
131
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205 }
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206
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207 protected:
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208 // How to activate a popup:
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209 /+void activatePopup (IChildWidget widget) {
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210 parentIPPW.addChildIPPW (this);
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211 popup = widget;
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212 mgr.positionPopup (this, popup);
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213 }+/
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214
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215 IPopupParentWidget parentIPPW;
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216 IPopupParentWidget childIPPW;
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217 IChildWidget popup;
152
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218 MenuPosition mAIPPW;
131
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219 }
171
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220
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221 import mde.content.Content;
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222 /******************************************************************************
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223 * Not "really" a widget (zero size, no direct interaction), but a handler for
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224 * popup widgets.
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225 *
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226 * Intended to manage a context menu for WidgetManager, and not to work quite
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227 * like a regular IPPW.
172
0dd49f333189 Implemented "void setContent (IContent)".
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228 *
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229 * Doesn't implement all the IChildWidget methods that would be relevent,
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230 * because it's not used like a regular widget.
171
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231 *****************************************************************************/
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232 class PopupHandlerWidget : APopupParentWidget
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233 {
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234 this (IWidgetManager mgr, IParentWidget parent, widgetID id, char[] subWidg, IContent c) {
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235 assert (parent is mgr); // we're not meant to be used like a normal widget
171
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236 super (mgr, parent, id);
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237
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238 popup = mgr.makeWidget (this, subWidg, c);
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239 subWidgets = [popup];
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240
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241 w = mw = 0;
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242 h = mh = 0;
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243 }
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244
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245 /// Open a context menu
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246 void openMenu (IChildWidget underMouse, Content contextContent) {
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247 if (mAIPPW != MenuPosition.INACTIVE) return; // already in use
173
a1ba9157510e Enabled ServiceContentList to call its callbacks when its value changes. Tried to fix some other bugs, but this is not a very clean commit, due to wanting to make some big changes to enable better use of invariants next.
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248 //NOTE: Disabled since it doesn't work correctly atm:
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249 //subWidgets[0].setContent = contextContent;
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250 parentIPPW.addChildIPPW (this);
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251 // For context menus, don't set parentIPPW.menuActive like for clicked menus:
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252 menuActive = mgr.positionPopup (underMouse, popup);
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253 mgr.requestRedraw;
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254 }
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255 }