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annotate mde/gui/widget/Window.d @ 65:891211f034f2

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Changes to widgets: widgets may now get strings as creation data. Strings for TextWidgets can be set in files (in a temporary mannor).
author Diggory Hardy <diggory.hardy@gmail.com>
date Sun, 29 Jun 2008 15:40:37 +0100
parents d43523ed4b62
children f54ae4fc2b2f
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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 Window class. Hopefully eventually this will become a widget to make things a bit more
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17 * generic. */
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18 module mde.gui.widget.Window;
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19
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20 import mde.gui.widget.Ifaces;
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21 import mde.gui.widget.createWidget;
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22
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23 import mde.gui.IGui;
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24 import mde.gui.exception;
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25 import mde.gui.renderer.createRenderer;
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26
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27 import mt = mde.mergetag.DataSet;
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28 import tango.scrapple.text.convert.parseTo : parseTo;
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29 import tango.scrapple.text.convert.parseFrom : parseFrom;
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31 import tango.util.log.Log : Log, Logger;
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32
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33 private Logger logger;
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34 static this () {
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35 logger = Log.getLogger ("mde.gui.widget.Window");
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36 }
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37
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38 /** GUI Window class
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39 *
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40 * A window class instance does two things: (1) specify a region of the screen upon which the window
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41 * and its associated widgets are drawn, and (2) load, save, and generally manage all its widgets.
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42 *
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43 * Let the window load a table of widget data, of type int[][widgetID]. Each widget will, when
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44 * created, be given its int[] of data, which this() must confirm is valid (or throw).
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45 */
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46 class Window : mt.IDataSection, IWindow
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47 {
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48 //BEGIN Methods for GUI
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49 this (char[] id) {
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50 name = id;
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51 }
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52
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53 /** Call after loading is finished to setup the window and confirm that it's valid.
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54 *
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55 * Throws: WindowLoadException (or possibly other exceptions). Do not use the instance if an
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56 * exception occurs! */
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57 void finalise (IGui gui)
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58 in {
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59 assert (gui !is null, "Window.finalise ("~name~"): gui is null");
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60 } body {
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61 // Check data was loaded:
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62 if (widgetData is null)
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63 throw new WindowLoadException ("No widget creation data");
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64
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65 // Save gui and create the renderer:
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66 gui_ = gui;
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67 rend = createRenderer (gui.rendererName);
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68
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69 // Create the primary widget (and indirectly all sub-widgets), throwing on error:
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70 // Note: GridLayoutWidget's this relies on rend.layoutSpacing.
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71 widget = makeWidget (0); // primary widget always has ID 0.
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72 // This data is no longer needed by Window, although its sub-arrays may still be used, so
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73 // let the GC collect what it can:
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74 widgetData = null;
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75 widgetStrings = null;
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76
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77 // get border sizes:
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78 border = rend.setSizable (isWSizable, isHSizable); // depends on widget
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79
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80 // Note: this should return an empty array, but we shouldn't make a fuss if it's not empty:
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81 if ((widget.adjust (mutableData)).length != 0) // adjust/set size, etc., depends on rend
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82 logger.warn ("Local widget position data is invalid!");
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83 mutableData = null; // no longer needed
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84
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85 widget.getCurrentSize (w,h); // and get this size
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86 w += border.l + border.r; // Adjust for border
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87 h += border.t + border.b;
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88
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89 widgetX = x + border.l; // widget position
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90 widgetY = y + border.t; // must be updated if the window is moved
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91 widget.setPosition (widgetX, widgetY);
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92
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93 // Calculate mw/mh and xw/yh (cached data):
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94 widget.getMinimalSize (mw, mh);
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95 mw += border.l + border.r;
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96 mh += border.t + border.b;
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97
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98 xw = x+w;
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99 yh = y+h;
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100 }
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101 //BEGIN Mergetag code
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102 void addTag (char[] tp, mt.ID id, char[] dt) {
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103 // Priority is HIGH_LOW, so don't overwrite data which has already been loaded.
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104 if (tp == INTAINT) {
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105 if (id == WDGD && widgetData == null) {
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106 widgetData = cast(int[][widgetID]) parseTo!(int[][int]) (dt);
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107 }
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108 } else if (tp == CHARAINT) {
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109 if (id == WS && widgetStrings == null) {
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110 widgetStrings = parseTo!(char[][int]) (dt);
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111 }
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112 } else if (tp == INTA) {
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113 if (id == MD && mutableData == null) {
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114 mutableData = parseTo!(int[]) (dt);
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115 }
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116 } else if (tp == INT) {
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117 if (id == X && x == -1) {
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118 x = cast(wdim) parseTo!(int) (dt);
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119 } else if (id == Y && y == -1) {
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120 y = cast(wdim) parseTo!(int) (dt);
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121 }
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122 }
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123 }
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124 void writeAll (ItemDelg dlg)
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125 in {
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126 assert (widgetData is null, "Window.writeAll: widgetData !is null");
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127 } body {
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128 /+ NOTE: currently editing is impossible...
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129 if (edited) { // only save the widget creation data if it's been adjusted:
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130 addCreationData (widget); // generate widget save data
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131 dlg (INTAINT, WDGD, parseFrom!(int[][int]) (widgetData));
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132 dlg (CHARAINT, WS, parseFrom!(char[][int]) (widgetStrings));
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133 }+/
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134 // Save mutable data:
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135 dlg (INTA, MD, parseFrom!(int[]) (widget.getMutableData));
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136 // Save the window position:
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137 dlg (INT, X, parseFrom!(int) (x));
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138 dlg (INT, Y, parseFrom!(int) (y));
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139 }
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140 private static const {
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141 auto CHARAINT = "char[][int]";
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142 auto INTAINT = "int[][int]";
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143 auto INTA = "int[]";
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144 auto INT = "int";
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145 auto WDGD = "widgetData";
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146 auto MD = "mutableData";
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147 auto WS = "widgetStrings";
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148 auto X = "x";
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149 auto Y = "y";
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150 }
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151 //END Mergetag code
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152 //END Methods for GUI
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153
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154 //BEGIN IWindow methods
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155 /** Get/create a widget by ID.
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156 *
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157 * Should $(I only) be called internally and by sub-widgets! */
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158 IWidget makeWidget (widgetID i)
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159 in {
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160 // widgetData is normally left to be garbage collected after widgets have been created:
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161 assert (widgetData !is null, "Window.makeWidget ("~name~"): widgetData is null");
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162 } body {
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163 /* Each widget returned should be a unique object; if multiple widgets are requested with
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164 * the same ID, a new widget is created each time. */
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165
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166 int[]* d = i in widgetData;
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167 if (d is null)
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168 throw new WindowLoadException ("Window.makeWidget ("~name~"): Widget not found");
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169
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170 // Throws WidgetDataException (a WindowLoadException) if bad data:
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171 return createWidget (this, *d);
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172 }
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173
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174 char[] getWidgetString (int i)
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175 in {
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176 // widgetStrings is freed at same time as widgetData
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177 // but widgetData is guaranteed to be read
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178 assert (widgetData !is null, "getWidgetString called after widget creation finished");
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179 } body {
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180 char[]* p;
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181 if (widgetStrings is null ||
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182 (p = i in widgetStrings) is null )
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183 throw new WindowLoadException ("Needed widgetStrings not set for Window");
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184
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185 return *p;
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186 }
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187
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188 /** Add this widget's data to that to be saved, returning it's widgetID. */
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189 widgetID addCreationData (IWidget widget)
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190 {
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191 widgetID i;
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192 if (widgetData is null)
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193 i = 0;
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194 else
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195 i = widgetData.keys[$-1] + 1;
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196
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197 /+ Doesn't this have no effect except when getCreationData throws, in which case the data
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198 + isn't used anyway? I'm sure it was added for a reason... FIXME and below
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199 widgetData[i] = null; // Make sure the same ID doesn't get used by a recursive call
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200 +/
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201 widgetData[i] = widget.getCreationData;
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202
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203 return i;
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204 }
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205
65
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206 int addWidgetString (char[] str)
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207 {
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208 int i;
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209 if (widgetStrings is null)
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210 i = 0;
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211 else
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212 i = widgetStrings.keys[$-1] + 1;
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213
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214 /+ See above. FIXME
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215 widgetStrings[i] = null; // Make sure the same ID doesn't get used by a recursive call
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216 +/
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217 widgetStrings[i] = str;
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218
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219 return i;
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220 }
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221
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222 IGui gui () {
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223 return gui_;
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224 }
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225
41
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226 void requestRedraw () {
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227 gui_.requestRedraw;
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228 }
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229
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230 IRenderer renderer ()
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231 in {
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232 assert (rend !is null, "Window.renderer: rend is null");
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233 } body {
32
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234 return rend;
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235 }
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236 //END IWindow methods
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237
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238 //BEGIN IWidget methods
39
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239 //FIXME: how many of these methods are actually needed/used?
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240 int[] adjust (int[]) { // simply not relevant (never used)
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241 return [];
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242 }
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243 int[] getCreationData () { // simply not relevant (never used)
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244 return [];
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245 }
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246 int[] getMutableData () { // simply not relevant (never used)
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247 return [];
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248 }
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249
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250 bool isWSizable () {
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251 return widget.isWSizable;
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252 }
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253 bool isHSizable () {
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254 return widget.isHSizable;
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255 }
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256
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257 void getMinimalSize (out wdim wM, out wdim hM) {
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258 // mw/mh are calculated by finalise();
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259 wM = mw;
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260 hM = mh;
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261 }
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262 void getCurrentSize (out wdim cw, out wdim ch) {
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263 cw = w;
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264 ch = h;
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265 }
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266
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267 void setWidth (wdim nw, int dir) {
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268 if (nw < mw) w = mw; // clamp
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269 else w = nw;
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270 xw = x + w;
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271 widget.setWidth (w - border.l - border.r, dir);
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272 }
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273 void setHeight (wdim nh, int dir) {
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274 if (nh < mh) h = mh; // clamp
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275 else h = nh;
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276 yh = y + h;
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277 widget.setHeight (h - border.t - border.b, dir);
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278 }
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279
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280 void setPosition (wdim nx, wdim ny) {
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281 x = nx;
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282 y = ny;
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283
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284 xw = x+w;
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285 yh = y+h;
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286
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287 widgetX = x + border.l;
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288 widgetY = y + border.t;
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289
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290 widget.setPosition (widgetX, widgetY);
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291
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292 gui_.requestRedraw (); // necessary whenever the window is moved; setPosition is called after resizes and moves
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293 }
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294
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295 IWidget getWidget (wdim cx, wdim cy) {
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296 if (cx < x || cx >= xw || cy < y || cy >= yh) // not over window
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297 return null;
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298 if (cx >= widgetX && cx < xw-border.r && cy >= widgetY && cy < yh-border.b)
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299 // over the widget
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300 return widget.getWidget (cx, cy);
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301 else // over the window border
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302 return this;
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303 }
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304 void clickEvent (wdabs cx, wdabs cy, ubyte b, bool state) {
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305 if (b == 1 && state == true) {
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306 resizeType = rend.getResizeType (cx-x, cy-y, w,h);
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307
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308 if (resizeType != RESIZE_TYPE.NONE) { // Some type of resize
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309 // Set x/yDrag (unfortunately these need to be different for each edge)
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310 if (resizeType & RESIZE_TYPE.L)
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311 xDrag = w + cx;
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312 else if (resizeType & RESIZE_TYPE.R)
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313 xDrag = w - cx;
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314
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315 if (resizeType & RESIZE_TYPE.T)
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316 yDrag = h + cy;
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317 else if (resizeType & RESIZE_TYPE.B)
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318 yDrag = h - cy;
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319
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320 // Add the callbacks (they use resizeType which has already been set)
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321 gui_.addClickCallback (&endCallback);
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322 gui_.addMotionCallback (&resizeCallback);
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323 } else { // window is being moved
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324 xDrag = cx - x;
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325 yDrag = cy - y;
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326
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327 gui_.addClickCallback (&endCallback);
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328 gui_.addMotionCallback (&moveCallback);
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329 }
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330 }
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331 }
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332
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333 void draw () {
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334 // background
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335 rend.drawWindow (x,y, w,h);
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336
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337 // Tell the widget to draw itself:
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338 widget.draw();
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339 }
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340 //END IWidget methods
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341
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342 private:
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343 alias IRenderer.BorderDimensions BorderDimensions;
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344 alias IRenderer.RESIZE_TYPE RESIZE_TYPE;
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345
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346 //BEGIN Window moving and resizing
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347 void moveCallback (wdabs cx, wdabs cy) {
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348 setPosition (cx-xDrag, cy-yDrag);
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349 }
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350 void resizeCallback (wdabs cx, wdabs cy) {
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351 debug scope(failure)
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352 logger.trace ("resizeCallback: failure");
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353
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354 // This function is only called if some resize is going to happen.
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355 // x,y are used as parameters to setPosition as well as being affected by it; somewhat
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356 // pointless but fairly effective.
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357
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358 if (resizeType & RESIZE_TYPE.L) {
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359 wdim xSize = xDrag - cx;
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360 if (xSize < mw) xSize = mw; // clamp
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361 x += w - xSize;
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362 setWidth (xSize, 1);
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363 }
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364 else if (resizeType & RESIZE_TYPE.R) {
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365 setWidth (xDrag + cx, -1);
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366 }
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367 if (resizeType & RESIZE_TYPE.T) {
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368 wdim ySize = yDrag - cy;
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369 if (ySize < mh) ySize = mh;
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370 y += h - ySize;
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371 setHeight (ySize, 1);
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372 }
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373 else if (resizeType & RESIZE_TYPE.B) {
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374 setHeight (yDrag + cy, -1);
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375 }
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376
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377 // Moves lower (x,y) coordinate if necessary and repositions any sub-widgets moved by the
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378 // resizing:
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379 setPosition (x, y);
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380 }
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381 bool endCallback (wdabs cx, wdabs cy, ubyte b, bool state) {
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382 if (b == 1 && state == false) {
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383 // The mouse shouldn't have moved since the motion callback
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384 // was last called, so there's nothing else to do now.
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385 gui_.removeCallbacks (cast(void*) this);
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386
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387 return true; // we've handled the up-click
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388 }
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389 return false; // we haven't handled it
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390 }
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391 wdim xDrag, yDrag; // where a drag starts relative to x and y
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392 IRenderer.RESIZE_TYPE resizeType; // Type of current resize
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393 //END Window moving and resizing
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394
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395 // Load/save data:
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396 public char[] name; // The window's name (id from config file)
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397 //bool edited = false; // True if any widgets have been edited (excluding scaling)
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398
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399 // Data used for saving and loading (null in between):
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400 int[][widgetID] widgetData = null;// Data for all widgets under this window
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401 int[] mutableData = null; // Widget's mutable data (adjusted sizes, etc.)
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402 char[][int] widgetStrings = null;// Strings by ID; string-typed creation data
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403
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404 IGui gui_; // The gui managing this window
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405 IRenderer rend; // The window's renderer
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406
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407 IWidget widget; // The primary widget in this window.
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408
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409 wdim x = -1, y = -1; // Window position
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410 wdsize w,h; // Window size (calculated from Widgets)
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411 wdim xw, yh; // x+w, y+h (frequent use by clickEvent)
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412 wdim widgetX, widgetY; // Widget position (= window position plus BORDER_WIDTH)
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413 wdim mw = -1, mh = -1; // minimal size (negative means requires calculation)
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414
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415 BorderDimensions border; // Total border size (move plus resize)
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416 }