Mercurial > projects > mde
annotate mde/gui/WidgetManager.d @ 110:6acd96f8685f
Translation reloading as far as AContent name/desc supported. Limited & crude support for updating gui.
Gave AContent support for multiple callbacks.
New locale: "en".
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Fri, 05 Dec 2008 11:29:39 +0000 |
parents | c9fc2d303178 |
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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 * The gui manager class. |
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18 * |
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19 * This is the module to use externally to create a graphical user interface (likely also with |
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20 * content modules). |
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21 *************************************************************************************************/ |
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22 module mde.gui.WidgetManager; |
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23 |
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24 import mde.gui.WidgetDataSet; |
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25 import mde.gui.widget.Ifaces; |
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26 import mde.gui.renderer.createRenderer; |
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27 |
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28 import imde = mde.imde; |
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29 import mde.input.Input; |
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30 import mde.scheduler.Scheduler; |
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31 import mde.setup.Screen; |
110
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32 import Items = mde.content.Items; // loadTranslation |
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33 import mde.lookup.Options; // miscOpts.L10n callback |
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34 |
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35 import tango.core.sync.Mutex; |
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36 import tango.util.log.Log : Log, Logger; |
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37 import tango.util.container.CircularList; // pop-up draw callbacks |
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38 |
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39 private Logger logger; |
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40 static this () { |
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41 logger = Log.getLogger ("mde.gui.WidgetManager"); |
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42 } |
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43 |
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44 /************************************************************************************************* |
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45 * The widget manager. |
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46 * |
108
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47 * This provides a layer on top of WidgetLoader, handling input and rendering. Other functionality |
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48 * is contained in the super class, to simplify supporting new input/graphics libraries. |
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49 * |
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50 * Currently mouse coordinates are passed to widgets untranslated. It may make sense to translate |
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51 * them and possibly drop events for some uses, such as if the gui is drawn to a texture. |
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52 * |
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53 * Aside from the IWidgetManager methods, this class should be thread-safe. |
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54 *************************************************************************************************/ |
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55 class WidgetManager : WidgetLoader, Screen.IDrawable { |
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56 /** Construct a new widget manager. |
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57 * |
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58 * params: |
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59 * fileName = Name of file specifying the gui, excluding path and extension. |
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60 */ |
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61 this (char[] file) { |
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62 super(file); |
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63 |
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64 Screen.addDrawable (this); |
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65 } |
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66 |
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67 // this() runs during static this(), when imde.input doesn't exist. init() runs later. |
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68 void init () { |
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69 // Doesn't need a lock - cannot conflict with other class functions. |
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70 // Events we want to know about: |
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71 imde.input.addMouseClickCallback(&clickEvent); |
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72 imde.input.addMouseMotionCallback(&motionEvent); |
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73 |
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74 Items.loadTranslation (); |
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75 miscOpts.L10n.addCallback (&reloadStrings); |
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76 } |
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77 |
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78 |
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79 /** Draw the gui. */ |
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80 void draw() { |
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81 synchronized(mutex) { |
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82 if (child) |
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83 child.draw; |
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84 foreach (popup; popups.iterator.reverse) |
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85 popup.widget.draw(); |
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86 } |
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87 } |
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88 |
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89 |
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90 /** For mouse click events. |
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91 * |
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92 * Sends the event on to the relevant windows and all click callbacks. */ |
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93 void clickEvent (ushort cx, ushort cy, ubyte b, bool state) { |
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94 debug scope (failure) |
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95 logger.warn ("clickEvent: failed!"); |
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96 mutex.lock; |
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97 scope(exit) mutex.unlock; |
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98 if (child is null) return; |
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99 |
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100 // 1. Callbacks have the highest priority recieving events (e.g. a button release) |
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101 foreach (dg; clickCallbacks) |
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102 // See IWidgetManager.addClickCallback's documentation: |
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103 if (dg (cast(wdabs)cx, cast(wdabs)cy, b, state)) return; |
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104 |
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105 // 2. Then pop-ups |
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106 IChildWidget widg; |
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107 { |
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108 auto i = popups.iterator; |
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109 foreach (popup; i) with (popup) { |
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110 if (cx < x || cx >= x + w || |
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111 cy < y || cy >= y + h) { |
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112 i.remove; |
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113 requestRedraw; |
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114 } else { |
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115 widg = widget.getWidget (cast(wdabs)cx,cast(wdabs)cy); |
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116 break; |
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117 } |
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118 } |
91
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119 } |
108
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120 |
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121 // 3. Then the main widget tree |
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122 debug assert (cx < child.width && cy < child.height, "WidgetManager: child doesn't cover whole area (code error)"); |
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123 if (widg is null) |
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124 widg = child.getWidget (cast(wdabs)cx,cast(wdabs)cy); |
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125 if (keyFocus && keyFocus !is widg) { |
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126 keyFocus.keyFocusLost; |
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127 keyFocus = null; |
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128 imde.input.setLetterCallback (null); |
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129 } |
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130 if (widg !is null) { |
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131 if (widg.clickEvent (cast(wdabs)cx,cast(wdabs)cy,b,state) & 1) { |
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132 keyFocus = widg; |
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133 imde.input.setLetterCallback (&widg.keyEvent); |
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134 } |
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135 } |
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136 } |
34
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137 |
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138 /** For mouse motion events. |
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139 * |
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140 * Sends the event on to all motion callbacks. */ |
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141 void motionEvent (ushort cx, ushort cy) { |
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142 debug scope (failure) |
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143 logger.warn ("motionEvent: failed!"); |
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144 mutex.lock; |
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145 scope(exit) mutex.unlock; |
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146 |
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147 foreach (dg; motionCallbacks) |
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148 dg (cast(wdabs)cx, cast(wdabs)cy); |
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149 } |
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150 |
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151 |
86
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New InitStage system, Screen & Screen.Drawable, separate testing and guiDemo binaries.
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152 void sizeEvent (int nw, int nh) { // IDrawable function |
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153 mutex.lock; |
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154 scope(exit) mutex.unlock; |
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155 |
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156 w = cast(wdim) nw; |
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157 h = cast(wdim) nh; |
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158 |
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159 if (w < mw || h < mh) |
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160 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h); |
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161 |
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162 if (!child) return; // if not created yet. |
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163 child.setWidth (w, -1); |
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164 child.setHeight (h, -1); |
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165 child.setPosition (0,0); |
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166 } |
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167 |
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168 //BEGIN IWidgetManager methods |
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169 // These methods are only intended for use within the gui package. They are not necessarily |
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170 // thread-safe. |
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171 IRenderer renderer () { |
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172 assert (rend !is null, "WidgetManager.renderer: rend is null"); |
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173 return rend; |
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174 } |
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175 |
108
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176 void addPopup (wdabs px, wdabs py, IChildWidget widg) { |
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177 ActivePopup popup; |
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178 with (popup) { |
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179 widget = widg; |
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180 w = widg.width; |
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181 h = widg.height; |
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182 x = px + w > this.w ? this.w - w : px; |
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183 if (x < 0) x = 0; |
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184 y = py + h > this.h ? this.h - h : py; |
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185 if (y < 0) y = 0; |
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186 widget.setPosition (x, y); |
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187 } |
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188 popups.prepend (popup); |
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189 } |
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190 |
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191 void requestRedraw () { |
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192 imde.mainSchedule.request(imde.SCHEDULE.DRAW); |
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193 } |
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194 |
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195 void addClickCallback (bool delegate(wdabs, wdabs, ubyte, bool) dg) { |
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196 clickCallbacks[dg.ptr] = dg; |
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197 } |
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198 void addMotionCallback (void delegate(wdabs, wdabs) dg) { |
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199 motionCallbacks[dg.ptr] = dg; |
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200 } |
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201 void removeCallbacks (void* frame) { |
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202 clickCallbacks.remove(frame); |
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203 motionCallbacks.remove(frame); |
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204 } |
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205 //END IWidgetManager methods |
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206 |
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207 protected: |
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208 /* Second stage of widget loading. |
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209 * Note: sizeEvent should be called with window size before this. */ |
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210 void createRootWidget () { |
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211 // The renderer needs to be created on the first load, but not after this. |
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212 if (rend is null) |
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213 rend = createRenderer (rendName); |
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214 popups = new CircularList!(ActivePopup); |
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215 |
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216 child = makeWidget ("root"); |
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217 finalize; |
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218 |
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219 mw = child.minWidth; |
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220 mh = child.minHeight; |
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221 |
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222 if (w < mw || h < mh) |
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223 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h); |
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224 |
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225 child.setWidth (w, -1); |
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226 child.setHeight (h, -1); |
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227 child.setPosition (0,0); |
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228 } |
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229 |
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230 void preSave () { |
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231 if (keyFocus) { |
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232 keyFocus.keyFocusLost; |
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233 keyFocus = null; |
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234 imde.input.setLetterCallback (null); |
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235 } |
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236 } |
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237 |
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238 private: |
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239 struct ActivePopup { |
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240 IChildWidget widget; |
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241 wdabs x,y; |
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242 wdsize w,h; |
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243 } |
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244 IRenderer rend; |
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245 CircularList!(ActivePopup) popups;// Pop-up [menus] to draw. First element is top popup. |
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246 wdim w,h; // area available to the widgets |
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247 wdim mw,mh; // minimal area required by widgets (ideally for limiting w,h) |
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248 // callbacks indexed by their frame pointers: |
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249 bool delegate(wdabs cx, wdabs cy, ubyte b, bool state) [void*] clickCallbacks; |
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250 void delegate(wdabs cx, wdabs cy) [void*] motionCallbacks; |
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251 IChildWidget keyFocus; // widget receiving keyboard input when non-null |
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252 } |
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253 |
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254 |
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255 import mde.gui.exception; |
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256 import mde.gui.widget.Ifaces; |
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257 import mde.content.Content; |
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258 import mde.gui.widget.createWidget; |
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259 |
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260 import mde.file.mergetag.Reader; |
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261 import mde.file.mergetag.Writer; |
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262 import mde.setup.paths; |
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263 |
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264 /************************************************************************************************* |
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265 * Contains the code for loading and saving an entire gui (more than one may exist), but not the |
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266 * code for drawing it or handling user input. |
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267 * |
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268 * This abstract class exists solely for separating out some of the functionality. |
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269 *************************************************************************************************/ |
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270 abstract scope class WidgetLoader : IWidgetManager |
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271 { |
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272 /** Construct a new widget loader. |
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273 * |
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274 * params: |
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275 * fileName = Name of file specifying the gui, excluding path and extension. |
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276 */ |
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277 protected this (char[] file) { |
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278 mutex = new Mutex; // Used on functions intended to be called from outside the gui package. |
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279 fileName = file; |
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280 } |
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281 |
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282 /* Load the widgets' data from the file specified to the CTOR. |
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283 * |
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284 * params: |
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285 * allDesigns = Load all sections |
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286 */ |
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287 private void loadData (bool allDesigns = false) { |
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288 if (allLoaded || (defaultDesign !is null && allDesigns == false)) |
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289 return; // test if already loaded |
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290 |
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291 // Set up a reader |
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292 scope IReader reader; |
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293 try { |
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294 reader = confDir.makeMTReader (fileName, PRIORITY.HIGH_LOW, null, true); |
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295 |
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296 // Read from the HEADER: |
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297 // Get the renderer |
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298 char[]* p = "Renderer" in reader.dataset.header._charA; |
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299 if (p is null || *p is null) { |
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300 logger.warn ("No renderer specified: using \"Simple\""); |
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301 rendName = "Simple"; |
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302 } |
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303 else |
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304 rendName = *p; |
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305 |
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306 // Get which section to use |
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307 p = "Design" in reader.dataset.header._charA; |
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308 if (p is null || *p is null) { |
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309 logger.warn ("No gui design specified: trying \"Default\""); |
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310 defaultDesign = "Default"; |
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311 } |
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312 else |
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313 defaultDesign = *p; |
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314 |
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315 // Read the body: |
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316 // Load the chosen design |
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317 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) { |
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318 WidgetDataSet* p = id in data; |
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319 if (p is null) { |
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320 data[id] = new WidgetDataSet; |
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321 return *(id in data); |
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322 } |
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323 return *p; |
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324 }; |
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325 |
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326 if (allDesigns) { |
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327 reader.read; |
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328 allLoaded = true; |
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329 } else |
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330 reader.read([defaultDesign]); |
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331 } catch (NoFileException) { |
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332 logger.error ("Unable to load GUI: no config file!"); |
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333 // just return: not a fatal error (so long as the game can run without a GUI!) |
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334 } catch (Exception e) { |
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335 logger.error ("Unable to load GUI: errors parsing config file ("~confDir.getFileName(fileName,PRIORITY.HIGH_LOW)~"):"); |
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336 logger.error (e.msg); |
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337 throw new GuiException ("Failure parsing config file"); |
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338 } |
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339 } |
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340 |
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341 /** Load the gui from some design. |
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342 * |
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343 * If a design was previously loaded, its changes are saved first. |
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344 * |
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345 * Params: |
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346 * name = Design to load. If null, the default will be loaded. |
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347 */ |
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348 void loadDesign (char[] name = null) { |
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349 if (changes !is null) // A design was previously loaded |
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350 save; // own lock |
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351 |
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352 mutex.lock; |
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353 scope(exit) mutex.unlock; |
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354 |
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355 // Load data (loadData tests if it's already loaded first): |
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356 if (name is null) { |
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357 loadData (false); |
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358 name = defaultDesign; |
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359 } else |
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360 loadData (true); |
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361 |
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362 |
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363 // Get data: |
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364 auto p = name in data; |
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365 while (p is null) { |
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366 if (name == defaultDesign) |
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367 throw new GuiException ("Unable to load [specified or] default design"); |
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368 name = defaultDesign; // try again with the default |
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369 p = name in data; |
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370 } |
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371 curData = *p; |
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372 |
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373 // Get/create a changes section: |
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374 if (changesDS is null) |
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375 changesDS = new mt.DataSet; |
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376 |
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377 mt.IDataSection* q = name in changesDS.sec; |
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378 if (!q || ((changes = cast(WidgetDataChanges) *q) is null)) { |
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379 changes = new WidgetDataChanges (curData); |
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380 changesDS.sec[name] = changes; |
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381 } |
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382 |
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383 // Create the widgets: |
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384 createRootWidget; |
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385 } |
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386 |
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387 /** Save changes, if any exist. |
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388 * |
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389 * Is run when the manager is destroyed, but could be run at other times too. */ |
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390 void save () { |
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391 preSave; |
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392 |
80
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393 mutex.lock; |
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394 scope(exit) mutex.unlock; |
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395 |
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396 // Make all widgets save any changed data; return if no changes: |
93
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Widgets now save dimensions without preventing structural changes in the base config file from applying.
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397 if (!child.saveChanges) |
80
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398 return; |
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399 |
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400 if (loadUserFile) { // merge entries from user file into current changes |
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401 try { |
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402 scope IReader reader = confDir.makeMTReader ( |
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403 fileName, PRIORITY.HIGH_ONLY, changesDS, true); |
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404 |
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405 // Create if necessary, only corresponding to existing designs read: |
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406 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) { |
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407 WidgetDataSet* p = id in data; |
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408 if (p is null) |
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409 throw new Exception ("File has changed since it was loaded!"); |
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410 return new WidgetDataChanges (*p); |
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411 }; |
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412 |
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413 reader.read; |
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414 } catch (NoFileException) { |
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415 // No user file exists; not an error. |
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416 } catch (Exception e) { |
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417 logger.error ("Error reading "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" prior to saving:"); |
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418 logger.error (e.msg); |
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419 logger.error ("Overwriting the file."); |
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420 // Continue... |
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421 } |
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422 loadUserFile = false; // don't need to do it again |
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423 } |
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424 |
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425 try { // Save |
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426 IWriter writer; |
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427 writer = confDir.makeMTWriter (fileName, changesDS); |
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428 writer.write; |
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429 } catch (Exception e) { |
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430 logger.error ("Saving to "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" failed:"); |
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431 logger.error (e.msg); |
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432 // No point in throwing since it doesn't affect anything else. |
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433 } |
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434 } |
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435 |
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436 /** Get the names of all designs available. */ |
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437 char[][] designs() { |
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438 synchronized(mutex) { |
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439 loadData (true); |
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440 return data.keys; |
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441 } |
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442 } |
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443 |
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444 /** Called when translation strings have been reloaded. */ |
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445 void reloadStrings (AContent c) { |
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446 Items.loadTranslation; |
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447 child.reloadStrings; //FIXME : all widgets, resize |
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448 requestRedraw; |
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449 } |
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450 |
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451 protected: |
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452 /** Second stage of loading the widgets. |
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453 * |
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454 * loadDesign handles the data; this method needs to: |
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455 * --- |
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456 * // 1. Create the root widget: |
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457 * child = makeWidget ("root"); |
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458 * finalize; |
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459 * // 2. Set the setSize, e.g.: |
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460 * child.setWidth (child.minWidth, 1); |
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461 * child.setHeight (child.minHeight, 1); |
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462 * --- |
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463 */ |
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464 void createRootWidget(); |
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465 |
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466 /** Runs finalize for all descendants, in a deepest first order. */ |
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467 /* NOTE: The way this function works may seem a little odd, but it's designed to allow |
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468 * shared alignments to be initialized properly: |
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469 * 1. all sharing members need to know their children's min size |
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470 * 2. all sharing members need to add their children's min size to the alignment |
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471 * 3. all sharing members can only then get their min size |
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472 * This method will fail if alignment members are not all of the same generation. An alternate |
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473 * method without this drawback would be to have shared alignments created with a list of |
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474 * pointers to their members, and once all members have been created the alignment could |
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475 * initialize itself, first making sure each members' children have been initialized. */ |
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476 void finalize () { |
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477 IChildWidget[][] descendants; // first index: depth; is a list of widgets at each depth |
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478 |
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479 void recurseChildren (size_t depth, IChildWidget widget) { |
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480 foreach (child; widget.children) |
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481 recurseChildren (depth+1, child); |
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482 |
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483 if (descendants.length <= depth) |
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484 descendants.length = depth * 2 + 1; |
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485 descendants[depth] ~= widget; |
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486 } |
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487 |
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488 recurseChildren (0, child); |
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489 foreach_reverse (generation; descendants) { |
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490 foreach (widget; generation) |
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491 widget.prefinalize; |
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492 foreach (widget; generation) |
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493 widget.finalize; |
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494 } |
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495 } |
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496 |
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497 /** Called before saving (usually when the GUI is about to be destroyed, although not |
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498 * necessarily). */ |
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499 void preSave (); |
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500 |
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501 public: |
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502 //BEGIN IWidgetManager methods |
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503 IChildWidget makeWidget (widgetID id, IContent content = null) { |
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504 debug (mdeWidgets) logger.trace ("Creating widget \""~id~'"'); |
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505 return createWidget (this, id, curData[id], content); |
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506 } |
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507 IChildWidget makeWidget (widgetID id, WidgetData data, IContent content = null) { |
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508 debug (mdeWidgets) logger.trace ("Creating widget \""~id~'"'); |
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509 return createWidget (this, id, data, content); |
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510 } |
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511 |
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512 wdims dimData (widgetID id) { |
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513 return curData.dims (id); |
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514 } |
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515 void setData (widgetID id, WidgetData d) { |
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516 changes[id] = d; // also updates WidgetDataSet in data. |
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517 } |
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518 void setDimData (widgetID id, wdims d) { |
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519 changes.setDims(id, d); // also updates WidgetDataSet in data. |
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520 } |
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521 //END IWidgetManager methods |
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522 |
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523 protected: |
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524 final char[] fileName; |
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525 char[] defaultDesign; // The design specified in the file header. |
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526 char[] rendName; // Name of renderer; for saving and creating renderers |
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527 |
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528 // Loaded data, indexed by design name. May not be loaded for all gui designs: |
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529 scope WidgetDataSet[char[]] data; |
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530 private bool allLoaded = false; // applies to data |
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531 WidgetDataSet curData; // Current data |
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532 WidgetDataChanges changes; // Changes for the current design. |
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533 scope mt.DataSet changesDS; // changes and sections from user file (used for saving) |
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534 bool loadUserFile = true; // still need to load user file for saving? |
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535 |
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536 scope IChildWidget child; // The primary widget. |
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537 |
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538 Mutex mutex; // lock on methods for use outside the package. |
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539 } |