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annotate mde/gui/Gui.d @ 74:cee261eba249

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Minor tweaks.
author Diggory Hardy <diggory.hardy@gmail.com>
date Mon, 07 Jul 2008 15:54:47 +0100
parents 891211f034f2
children
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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4
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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15
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16 /** The Gui class.
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17 *
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18 * This is the module to use externally to create a graphical user interface (likely also with
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19 * content modules).
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20 *
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21 * Possibly add a GuiManager to update all active GUIs and pass coordinates (remapping if necessary). */
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22 module mde.gui.Gui;
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23
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24 import mde.gui.IGui;
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25 import mde.gui.widget.Ifaces;
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26 import mde.gui.widget.Window;
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27 import mde.gui.exception;
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28
36
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29 // For adding the input event callbacks and requesting redraws:
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30 import imde = mde.imde;
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31 import mde.input.Input;
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32 import mde.scheduler.Scheduler;
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33
32
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34 // For loading from file:
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35 import mt = mde.mergetag.DataSet;
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36 import mt = mde.mergetag.DefaultData;
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37 import mt = mde.mergetag.exception;
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38 import mde.mergetag.Reader;
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39 import mde.mergetag.Writer;
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40 import mde.setup.paths;
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41
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42 import tango.util.log.Log : Log, Logger;
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43
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44 private Logger logger;
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45 static this () {
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46 logger = Log.getLogger ("mde.gui.gui");
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47
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48 gui = new Gui; // until Guis are handled otherwise, this may as well be the case
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49 }
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50
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51 Gui gui; // Currently just one instance; handle differently later.
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52 // Handle externally or with a GUI Manager?
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53
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54 /** A GUI handles a bunch of windows, all to be drawn to the same device. */
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55 class Gui : IGui {
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56 //BEGIN Methods for external use
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57 //BEGIN Loading code
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58 /** Load all windows from the file gui. */
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59 void load (char[] fileName) {
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60 if (!confDir.exists (fileName)) {
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61 logger.error ("Unable to load GUI: no config file!");
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62 return; // not a fatal error (so long as the game can run without a GUI!)
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63 }
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64
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65 IReader reader;
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66 try {
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67 reader = confDir.makeMTReader (fileName, PRIORITY.HIGH_LOW, null, true);
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68 reader.dataSecCreator = delegate mt.IDataSection(mt.ID id) {
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69 return new Window (id);
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70 };
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71 reader.read;
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72 } catch (Exception e) {
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73 logger.error ("Unable to load GUI: errors parsing config file ("~confDir.getFileName(fileName,PRIORITY.HIGH_LOW)~"):");
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74 logger.error (e.msg);
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75 throw new GuiException ("Failure parsing config file");
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76 }
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77
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78 // Get the renderer
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79 char[]* p = "Renderer" in reader.dataset.header.Arg!(char[]);
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80 if (p is null || *p is null) {
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81 logger.warn ("no renderer specified: defaulting to Simple");
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82 rendName = "Simple";
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83 }
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84 else
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85 rendName = *p;
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86
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87 // get list
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88 windows.length = reader.dataset.sec.length; // pre-allocate
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89 windows.length = 0;
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90 foreach (sec; reader.dataset.sec) {
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91 Window w = cast(Window) sec;
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92 debug if (w is null) {
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93 logger.error (__FILE__ ~ "(GUI.load): code error (w is null)");
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94 continue;
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95 }
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96 try {
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97 w.finalise (this); // if this fails, the window (but nothing else) won't work
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98 windows ~= w; // only add if load successful
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99 } catch (Exception e) {
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100 logger.error ("Window failed to load: " ~ e.msg);
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101 }
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102 }
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103
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104 imde.input.addMouseClickCallback(&clickEvent);
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105 imde.input.addMouseMotionCallback(&motionEvent);
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106 }
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107
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108 void save (char[] fileName) {
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109 mt.DataSet ds = new mt.DataSet;
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110
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111 // Add header:
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112 ds.header = new mt.DefaultData;
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113 ds.header.Arg!(char[])["Renderer"] = rendName;
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114
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115 // Add windows to be saved:
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116 foreach (window; windows)
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117 ds.sec [window.name] = window;
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118
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119 try { // Save
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120 IWriter writer;
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121 writer = confDir.makeMTWriter (fileName, ds);
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122 writer.write;
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123 } catch (mt.MTException e) {
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124 logger.error ("Saving GUI failed:");
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125 logger.error (e.msg);
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126
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127 return;
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128 }
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129 }
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130 //END Loading code
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131
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132 /** Draw each window.
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133 *
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134 * Currently no concept of how to draw overlapping windows, or how to not bother drawing windows
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135 * which don't need redrawing. */
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136 void draw() {
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137 foreach_reverse (w; windows) // Draw, starting with back-most window.
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138 w.draw;
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139 }
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140
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141 /** For mouse click events.
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142 *
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143 * Sends the event on to the relevant windows and all click callbacks. */
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144 void clickEvent (ushort cx, ushort cy, ubyte b, bool state) {
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145 debug scope (failure)
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146 logger.warn ("clickEvent: failed!");
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147
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148 // NOTE: buttons receive the up-event even when drag-callbacks are in place.
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149 foreach (dg; clickCallbacks)
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150 if (dg (cast(wdabs)cx, cast(wdabs)cy, b, state)) return; // See IGui.addClickCallback's documentation
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151
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152 foreach (i,w; windows) {
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153 IWidget widg = w.getWidget (cast(wdabs)cx,cast(wdabs)cy);
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154 if (widg !is null) {
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155 // Bring to front
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156 windows = w ~ windows[0..i] ~ windows[i+1..$];
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157
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158 widg.clickEvent (cast(wdabs)cx,cast(wdabs)cy,b,state);
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159 requestRedraw; // in case we've only moved to front
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160 return; // only pass to first window
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161 }
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162 }
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163 }
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164
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165 /** For mouse motion events.
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166 *
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167 * Sends the event on to all motion callbacks. */
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168 void motionEvent (ushort cx, ushort cy) {
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169 debug scope (failure)
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170 logger.warn ("motionEvent: failed!");
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171 foreach (dg; motionCallbacks)
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172 dg (cast(wdabs)cx, cast(wdabs)cy);
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173 }
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174
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175 //END Methods for external use
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176
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177 //BEGIN IGui methods
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178 char[] rendererName () {
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179 return rendName;
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180 }
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181
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182 void requestRedraw () {
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183 imde.mainSchedule.request(imde.SCHEDULE.DRAW);
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184 }
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185
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186 void addClickCallback (bool delegate(wdabs, wdabs, ubyte, bool) dg) {
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187 clickCallbacks[dg.ptr] = dg;
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188 }
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189 void addMotionCallback (void delegate(wdabs, wdabs) dg) {
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190 motionCallbacks[dg.ptr] = dg;
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191 }
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192 void removeCallbacks (void* frame) {
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193 clickCallbacks.remove(frame);
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194 motionCallbacks.remove(frame);
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195 }
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196 //END IGui methods
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197
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198 private:
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199 Window[] windows; // Windows. First window is "on top", others may be obscured.
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200
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201 char[] rendName; // Name of renderer; for saving and creating renderers
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202
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203 // callbacks indexed by their frame pointers:
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204 bool delegate(wdabs cx, wdabs cy, ubyte b, bool state) [void*] clickCallbacks;
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205 void delegate(wdabs cx, wdabs cy) [void*] motionCallbacks;
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206 }