Mercurial > projects > mde
annotate mde/gui/WidgetManager.d @ 108:c9fc2d303178
Added capability for border-less pop-up widgets. Simple pop-up menu.
Removed grid-layout spacing (may allow any widget to provide spacing later).
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Wed, 03 Dec 2008 19:37:32 +0000 |
parents | 08651e8a8c51 |
children | 6acd96f8685f |
rev | line source |
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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 // For adding the input event callbacks and requesting redraws: |
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29 import imde = mde.imde; |
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30 import mde.input.Input; |
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31 import mde.scheduler.Scheduler; |
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32 import mde.setup.Screen; |
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33 |
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34 import tango.core.sync.Mutex; |
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35 import tango.util.log.Log : Log, Logger; |
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36 import tango.util.container.CircularList; // pop-up draw callbacks |
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37 |
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38 private Logger logger; |
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39 static this () { |
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40 logger = Log.getLogger ("mde.gui.WidgetManager"); |
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41 } |
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42 |
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43 /************************************************************************************************* |
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44 * The widget manager. |
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45 * |
108
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46 * This provides a layer on top of WidgetLoader, handling input and rendering. Other functionality |
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47 * is contained in the super class, to simplify supporting new input/graphics libraries. |
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48 * |
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49 * Currently mouse coordinates are passed to widgets untranslated. It may make sense to translate |
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50 * them and possibly drop events for some uses, such as if the gui is drawn to a texture. |
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51 * |
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52 * Aside from the IWidgetManager methods, this class should be thread-safe. |
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53 *************************************************************************************************/ |
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54 class WidgetManager : WidgetLoader, Screen.IDrawable { |
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55 /** Construct a new widget manager. |
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56 * |
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57 * params: |
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58 * fileName = Name of file specifying the gui, excluding path and extension. |
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59 */ |
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60 this (char[] file) { |
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61 super(file); |
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62 |
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63 Screen.addDrawable (this); |
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64 } |
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65 |
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66 // this() runs during static this(), when imde.input doesn't exist. init() runs later. |
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67 void init () { |
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68 // Doesn't need a lock - cannot conflict with other class functions. |
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69 // Events we want to know about: |
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70 imde.input.addMouseClickCallback(&clickEvent); |
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71 imde.input.addMouseMotionCallback(&motionEvent); |
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72 } |
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73 |
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74 |
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75 /** Draw the gui. */ |
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76 void draw() { |
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77 synchronized(mutex) { |
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78 if (child) |
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79 child.draw; |
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80 foreach (popup; popups.iterator.reverse) |
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81 popup.widget.draw(); |
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82 } |
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83 } |
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84 |
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85 |
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86 /** For mouse click events. |
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87 * |
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88 * Sends the event on to the relevant windows and all click callbacks. */ |
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89 void clickEvent (ushort cx, ushort cy, ubyte b, bool state) { |
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90 debug scope (failure) |
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91 logger.warn ("clickEvent: failed!"); |
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92 mutex.lock; |
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93 scope(exit) mutex.unlock; |
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94 if (child is null) return; |
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95 |
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96 // 1. Callbacks have the highest priority recieving events (e.g. a button release) |
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97 foreach (dg; clickCallbacks) |
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98 // See IWidgetManager.addClickCallback's documentation: |
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99 if (dg (cast(wdabs)cx, cast(wdabs)cy, b, state)) return; |
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100 |
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101 // 2. Then pop-ups |
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102 IChildWidget widg; |
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103 { |
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104 auto i = popups.iterator; |
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105 foreach (popup; i) with (popup) { |
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106 if (cx < x || cx >= x + w || |
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107 cy < y || cy >= y + h) { |
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108 i.remove; |
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109 requestRedraw; |
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110 } else { |
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111 widg = widget.getWidget (cast(wdabs)cx,cast(wdabs)cy); |
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112 break; |
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113 } |
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114 } |
91
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115 } |
108
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116 |
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117 // 3. Then the main widget tree |
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118 debug assert (cx < child.width && cy < child.height, "WidgetManager: child doesn't cover whole area (code error)"); |
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119 if (widg is null) |
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120 widg = child.getWidget (cast(wdabs)cx,cast(wdabs)cy); |
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121 if (keyFocus && keyFocus !is widg) { |
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122 keyFocus.keyFocusLost; |
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123 keyFocus = null; |
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124 imde.input.setLetterCallback (null); |
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125 } |
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126 if (widg !is null) { |
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127 if (widg.clickEvent (cast(wdabs)cx,cast(wdabs)cy,b,state) & 1) { |
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128 keyFocus = widg; |
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129 imde.input.setLetterCallback (&widg.keyEvent); |
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130 } |
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131 } |
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132 } |
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133 |
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134 /** For mouse motion events. |
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135 * |
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136 * Sends the event on to all motion callbacks. */ |
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137 void motionEvent (ushort cx, ushort cy) { |
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138 debug scope (failure) |
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139 logger.warn ("motionEvent: failed!"); |
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140 mutex.lock; |
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141 scope(exit) mutex.unlock; |
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142 |
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143 foreach (dg; motionCallbacks) |
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144 dg (cast(wdabs)cx, cast(wdabs)cy); |
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145 } |
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146 |
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147 |
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New InitStage system, Screen & Screen.Drawable, separate testing and guiDemo binaries.
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148 void sizeEvent (int nw, int nh) { // IDrawable function |
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149 mutex.lock; |
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150 scope(exit) mutex.unlock; |
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151 |
85
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152 w = cast(wdim) nw; |
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153 h = cast(wdim) nh; |
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154 |
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155 if (w < mw || h < mh) |
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156 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h); |
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157 |
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158 if (!child) return; // if not created yet. |
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159 child.setWidth (w, -1); |
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160 child.setHeight (h, -1); |
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161 child.setPosition (0,0); |
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162 } |
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163 |
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164 //BEGIN IWidgetManager methods |
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165 // These methods are only intended for use within the gui package. They are not necessarily |
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166 // thread-safe. |
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167 IRenderer renderer () { |
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168 assert (rend !is null, "WidgetManager.renderer: rend is null"); |
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169 return rend; |
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170 } |
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171 |
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172 void addPopup (wdabs px, wdabs py, IChildWidget widg) { |
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173 ActivePopup popup; |
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174 with (popup) { |
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175 widget = widg; |
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176 w = widg.width; |
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177 h = widg.height; |
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178 x = px + w > this.w ? this.w - w : px; |
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179 if (x < 0) x = 0; |
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180 y = py + h > this.h ? this.h - h : py; |
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181 if (y < 0) y = 0; |
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182 widget.setPosition (x, y); |
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183 } |
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184 popups.prepend (popup); |
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185 } |
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186 |
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187 void requestRedraw () { |
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188 imde.mainSchedule.request(imde.SCHEDULE.DRAW); |
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189 } |
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190 |
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191 void addClickCallback (bool delegate(wdabs, wdabs, ubyte, bool) dg) { |
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192 clickCallbacks[dg.ptr] = dg; |
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193 } |
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194 void addMotionCallback (void delegate(wdabs, wdabs) dg) { |
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195 motionCallbacks[dg.ptr] = dg; |
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196 } |
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197 void removeCallbacks (void* frame) { |
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198 clickCallbacks.remove(frame); |
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199 motionCallbacks.remove(frame); |
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200 } |
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201 //END IWidgetManager methods |
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202 |
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203 protected: |
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204 /* Second stage of widget loading. |
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205 * Note: sizeEvent should be called with window size before this. */ |
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206 void createRootWidget () { |
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207 // The renderer needs to be created on the first load, but not after this. |
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208 if (rend is null) |
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209 rend = createRenderer (rendName); |
108
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210 popups = new CircularList!(ActivePopup); |
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211 |
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212 child = makeWidget ("root"); |
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213 finalize; |
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214 |
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215 mw = child.minWidth; |
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216 mh = child.minHeight; |
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217 |
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218 if (w < mw || h < mh) |
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219 logger.warn ("Minimal dimensions ({},{}) not met: ({},{}), but I cannot resize myself!",mw,mh,w,h); |
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220 |
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221 child.setWidth (w, -1); |
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222 child.setHeight (h, -1); |
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223 child.setPosition (0,0); |
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224 } |
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225 |
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226 void preSave () { |
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227 if (keyFocus) { |
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228 keyFocus.keyFocusLost; |
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229 keyFocus = null; |
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230 imde.input.setLetterCallback (null); |
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231 } |
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232 } |
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233 |
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234 private: |
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235 struct ActivePopup { |
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236 IChildWidget widget; |
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237 wdabs x,y; |
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238 wdsize w,h; |
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239 } |
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240 IRenderer rend; |
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241 CircularList!(ActivePopup) popups;// Pop-up [menus] to draw. First element is top popup. |
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242 wdim w,h; // area available to the widgets |
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243 wdim mw,mh; // minimal area required by widgets (ideally for limiting w,h) |
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244 // callbacks indexed by their frame pointers: |
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245 bool delegate(wdabs cx, wdabs cy, ubyte b, bool state) [void*] clickCallbacks; |
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246 void delegate(wdabs cx, wdabs cy) [void*] motionCallbacks; |
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247 IChildWidget keyFocus; // widget receiving keyboard input when non-null |
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248 } |
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249 |
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250 |
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251 import mde.gui.exception; |
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252 import mde.gui.widget.Ifaces; |
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253 import mde.content.Content; |
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254 import mde.gui.widget.createWidget; |
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255 |
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256 import mde.file.mergetag.Reader; |
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257 import mde.file.mergetag.Writer; |
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258 import mde.setup.paths; |
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259 |
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260 /************************************************************************************************* |
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261 * Contains the code for loading and saving an entire gui (more than one may exist), but not the |
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262 * code for drawing it or handling user input. |
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263 * |
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264 * This abstract class exists solely for separating out some of the functionality. |
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265 *************************************************************************************************/ |
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266 abstract scope class WidgetLoader : IWidgetManager |
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267 { |
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268 /** Construct a new widget loader. |
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269 * |
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270 * params: |
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271 * fileName = Name of file specifying the gui, excluding path and extension. |
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272 */ |
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273 protected this (char[] file) { |
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274 mutex = new Mutex; // Used on functions intended to be called from outside the gui package. |
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275 fileName = file; |
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276 } |
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277 |
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278 /* Load the widgets' data from the file specified to the CTOR. |
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279 * |
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280 * params: |
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281 * allDesigns = Load all sections |
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282 */ |
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283 private void loadData (bool allDesigns = false) { |
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284 if (allLoaded || (defaultDesign !is null && allDesigns == false)) |
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285 return; // test if already loaded |
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286 |
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287 // Set up a reader |
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288 scope IReader reader; |
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289 try { |
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290 reader = confDir.makeMTReader (fileName, PRIORITY.HIGH_LOW, null, true); |
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291 |
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292 // Read from the HEADER: |
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293 // Get the renderer |
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294 char[]* p = "Renderer" in reader.dataset.header._charA; |
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295 if (p is null || *p is null) { |
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296 logger.warn ("No renderer specified: using \"Simple\""); |
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297 rendName = "Simple"; |
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298 } |
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299 else |
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300 rendName = *p; |
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301 |
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302 // Get which section to use |
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303 p = "Design" in reader.dataset.header._charA; |
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304 if (p is null || *p is null) { |
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305 logger.warn ("No gui design specified: trying \"Default\""); |
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306 defaultDesign = "Default"; |
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307 } |
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308 else |
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309 defaultDesign = *p; |
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310 |
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311 // Read the body: |
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312 // Load the chosen design |
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313 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) { |
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314 WidgetDataSet* p = id in data; |
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315 if (p is null) { |
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316 data[id] = new WidgetDataSet; |
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317 return *(id in data); |
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318 } |
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319 return *p; |
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320 }; |
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321 |
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322 if (allDesigns) { |
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323 reader.read; |
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324 allLoaded = true; |
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325 } else |
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326 reader.read([defaultDesign]); |
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327 } catch (NoFileException) { |
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328 logger.error ("Unable to load GUI: no config file!"); |
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329 // just return: not a fatal error (so long as the game can run without a GUI!) |
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330 } catch (Exception e) { |
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331 logger.error ("Unable to load GUI: errors parsing config file ("~confDir.getFileName(fileName,PRIORITY.HIGH_LOW)~"):"); |
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332 logger.error (e.msg); |
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333 throw new GuiException ("Failure parsing config file"); |
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334 } |
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335 } |
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336 |
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337 /** Load the gui from some design. |
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338 * |
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339 * If a design was previously loaded, its changes are saved first. |
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340 * |
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341 * Params: |
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342 * name = Design to load. If null, the default will be loaded. |
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343 */ |
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344 void loadDesign (char[] name = null) { |
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345 if (changes !is null) // A design was previously loaded |
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346 save; // own lock |
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347 |
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348 mutex.lock; |
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349 scope(exit) mutex.unlock; |
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350 |
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351 // Load data (loadData tests if it's already loaded first): |
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352 if (name is null) { |
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353 loadData (false); |
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354 name = defaultDesign; |
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355 } else |
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356 loadData (true); |
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357 |
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358 |
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359 // Get data: |
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360 auto p = name in data; |
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361 while (p is null) { |
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362 if (name == defaultDesign) |
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363 throw new GuiException ("Unable to load [specified or] default design"); |
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364 name = defaultDesign; // try again with the default |
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365 p = name in data; |
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366 } |
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367 curData = *p; |
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368 |
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369 // Get/create a changes section: |
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370 if (changesDS is null) |
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371 changesDS = new mt.DataSet; |
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372 |
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373 mt.IDataSection* q = name in changesDS.sec; |
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374 if (!q || ((changes = cast(WidgetDataChanges) *q) is null)) { |
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375 changes = new WidgetDataChanges (curData); |
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376 changesDS.sec[name] = changes; |
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377 } |
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378 |
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379 // Create the widgets: |
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380 createRootWidget; |
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381 } |
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382 |
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383 /** Save changes, if any exist. |
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384 * |
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385 * Is run when the manager is destroyed, but could be run at other times too. */ |
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386 void save () { |
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387 preSave; |
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388 |
80
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389 mutex.lock; |
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390 scope(exit) mutex.unlock; |
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391 |
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392 // 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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393 if (!child.saveChanges) |
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394 return; |
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395 |
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396 if (loadUserFile) { // merge entries from user file into current changes |
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397 try { |
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398 scope IReader reader = confDir.makeMTReader ( |
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399 fileName, PRIORITY.HIGH_ONLY, changesDS, true); |
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400 |
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401 // Create if necessary, only corresponding to existing designs read: |
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402 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) { |
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403 WidgetDataSet* p = id in data; |
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404 if (p is null) |
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405 throw new Exception ("File has changed since it was loaded!"); |
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406 return new WidgetDataChanges (*p); |
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407 }; |
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408 |
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409 reader.read; |
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410 } catch (NoFileException) { |
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411 // No user file exists; not an error. |
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412 } catch (Exception e) { |
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413 logger.error ("Error reading "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" prior to saving:"); |
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414 logger.error (e.msg); |
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415 logger.error ("Overwriting the file."); |
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416 // Continue... |
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417 } |
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418 loadUserFile = false; // don't need to do it again |
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419 } |
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420 |
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421 try { // Save |
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422 IWriter writer; |
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423 writer = confDir.makeMTWriter (fileName, changesDS); |
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424 writer.write; |
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425 } catch (Exception e) { |
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426 logger.error ("Saving to "~confDir.getFileName(fileName,PRIORITY.HIGH_ONLY)~" failed:"); |
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427 logger.error (e.msg); |
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428 // No point in throwing since it doesn't affect anything else. |
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429 } |
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430 } |
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431 |
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432 /** Get the names of all designs available. */ |
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433 char[][] designs() { |
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434 synchronized(mutex) { |
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435 loadData (true); |
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436 return data.keys; |
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437 } |
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438 } |
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439 |
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440 /** Second stage of loading the widgets. |
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441 * |
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442 * loadDesign handles the data; this method needs to: |
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443 * --- |
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444 * // 1. Create the root widget: |
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445 * child = makeWidget ("root"); |
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446 * finalize; |
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447 * // 2. Set the setSize, e.g.: |
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448 * child.setWidth (child.minWidth, 1); |
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449 * child.setHeight (child.minHeight, 1); |
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450 * --- |
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451 */ |
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452 void createRootWidget(); |
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453 |
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454 /** Runs finalize for all descendants, in a deepest first order. */ |
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455 /* NOTE: The way this function works may seem a little odd, but it's designed to allow |
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456 * shared alignments to be initialized properly: |
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457 * 1. all sharing members need to know their children's min size |
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458 * 2. all sharing members need to add their children's min size to the alignment |
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459 * 3. all sharing members can only then get their min size |
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460 * This method will fail if alignment members are not all of the same generation. An alternate |
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461 * method without this drawback would be to have shared alignments created with a list of |
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462 * pointers to their members, and once all members have been created the alignment could |
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463 * initialize itself, first making sure each members' children have been initialized. */ |
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464 void finalize () { |
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465 IChildWidget[][] descendants; // first index: depth; is a list of widgets at each depth |
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466 |
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467 void recurseChildren (size_t depth, IChildWidget widget) { |
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468 foreach (child; widget.children) |
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469 recurseChildren (depth+1, child); |
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470 |
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471 if (descendants.length <= depth) |
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472 descendants.length = depth * 2 + 1; |
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473 descendants[depth] ~= widget; |
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474 } |
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475 |
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476 recurseChildren (0, child); |
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477 foreach_reverse (generation; descendants) { |
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478 foreach (widget; generation) |
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479 widget.prefinalize; |
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480 foreach (widget; generation) |
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481 widget.finalize; |
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482 } |
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483 } |
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484 |
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485 /** Called before saving (usually when the GUI is about to be destroyed, although not |
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486 * necessarily). */ |
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487 void preSave () {} |
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488 |
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489 //BEGIN IWidgetManager methods |
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490 IChildWidget makeWidget (widgetID id, IContent content = null) { |
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491 debug (mdeWidgets) logger.trace ("Creating widget \""~id~'"'); |
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492 return createWidget (this, id, curData[id], content); |
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493 } |
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494 IChildWidget makeWidget (widgetID id, WidgetData data, IContent content = null) { |
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495 debug (mdeWidgets) logger.trace ("Creating widget \""~id~'"'); |
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496 return createWidget (this, id, data, content); |
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497 } |
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498 |
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499 wdims dimData (widgetID id) { |
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500 return curData.dims (id); |
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501 } |
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502 void setData (widgetID id, WidgetData d) { |
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503 changes[id] = d; // also updates WidgetDataSet in data. |
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504 } |
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505 void setDimData (widgetID id, wdims d) { |
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506 changes.setDims(id, d); // also updates WidgetDataSet in data. |
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507 } |
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508 //END IWidgetManager methods |
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509 |
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510 protected: |
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511 final char[] fileName; |
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512 char[] defaultDesign; // The design specified in the file header. |
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513 char[] rendName; // Name of renderer; for saving and creating renderers |
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514 |
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515 // Loaded data, indexed by design name. May not be loaded for all gui designs: |
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516 scope WidgetDataSet[char[]] data; |
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517 private bool allLoaded = false; // applies to data |
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518 WidgetDataSet curData; // Current data |
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519 WidgetDataChanges changes; // Changes for the current design. |
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520 scope mt.DataSet changesDS; // changes and sections from user file (used for saving) |
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521 bool loadUserFile = true; // still need to load user file for saving? |
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522 |
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523 scope IChildWidget child; // The primary widget. |
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524 |
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525 Mutex mutex; // lock on methods for use outside the package. |
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526 } |