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annotate mde/gui/widget/Window.d @ 34:6b4116e6355c

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Work on the Gui: some of the framework for drag & drop. Also made Window an IWidget. Implemented getWidget(x,y) to find the widget under this location for IWidgets (but not Gui). Made Window an IWidget and made it work a little more similarly to widgets. Implemented callbacks on the Gui for mouse events (enabling drag & drop, etc.). committer: Diggory Hardy <diggory.hardy@gmail.com>
author Diggory Hardy <diggory.hardy@gmail.com>
date Fri, 02 May 2008 16:03:52 +0100
parents 316b0230a849
children 928db3c75ed3
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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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16 /** The Window class. Hopefully eventually this will become a widget to make things a bit more
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17 * generic. */
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18 module mde.gui.widget.Window;
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19
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20 import mde.gui.widget.Ifaces;
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21 import mde.gui.widget.createWidget;
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22
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23 import mde.gui.IGui;
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24 import mde.gui.exception;
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25
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26 import mt = mde.mergetag.DataSet;
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27 import tango.scrapple.text.convert.parseTo : parseTo;
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28 // not yet implemented:
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29 //import tango.scrapple.text.convert.parseFrom : parseFrom;
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30
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31 import tango.util.log.Log : Log, Logger;
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32
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33 private Logger logger;
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34 static this () {
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35 logger = Log.getLogger ("mde.gui.widget.Window");
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36 }
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37
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38 /** GUI Window class
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39 *
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40 * A window class instance does two things: (1) specify a region of the screen upon which the window
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41 * and its associated widgets are drawn, and (2) load, save, and generally manage all its widgets.
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42 *
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43 * Let the window load a table of widget data, of type int[][widgetID]. Each widget will, when
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44 * created, be given its int[] of data, which this() must confirm is valid (or throw).
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45 */
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46 class Window : mt.IDataSection, IWindow
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47 {
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48 //BEGIN Methods for GUI
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49 this (char[] id) {
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50 name = id;
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51 }
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52
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53 /** Call after loading is finished to setup the window and confirm that it's valid.
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54 *
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55 * Throws: WindowLoadException. Do not use the instance in this case! */
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56 void finalise (IGui gui)
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57 in {
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58 assert (gui !is null, "Window.finalise ("~name~"): gui is null");
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59 } body {
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60 // Check data was loaded:
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61 if (widgetData is null) throw new WindowLoadException ("No widget data");
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62
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63 gui_ = gui;
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64 rend = gui.renderer;
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65
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66 // Create the primary widget (and indirectly all sub-widgets), throwing on error:
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67 widget = makeWidget (0, this);// primary widget always has ID 0.
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68
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69 widgetData = null; // data is no longer needed: allow GC to collect (cannot safely delete)
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70
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71 widgetX = x + rend.windowBorder; // widget position
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72 widgetY = y + rend.windowBorder; // must be updated if the window is moved
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73 widget.setPosition (widgetX, widgetY);
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74
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75 widget.getCurrentSize (w,h);// Find the initial size
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76 w += rend.windowBorder * 2; // Adjust for border
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77 h += rend.windowBorder * 2;
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78
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79 xw = x+w;
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80 yh = y+h;
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81 }
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82 //BEGIN Mergetag code
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83 void addTag (char[] tp, mt.ID id, char[] dt) {
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84 if (tp == "int[][int]") {
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85 if (id == "widgetData") {
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86 widgetData = cast(int[][widgetID]) parseTo!(int[][int]) (dt);
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87 }
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88 } else if (tp == "int") {
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89 if (id == "x") {
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90 x = parseTo!(int) (dt);
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91 } else if (id == "y") {
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92 y = parseTo!(int) (dt);
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93 }
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94 }
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95 }
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96 void writeAll (ItemDelg dlg) {
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97 }
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98 //END Mergetag code
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99 //END Methods for GUI
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100
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101 //BEGIN IWindow methods
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102 /** Get/create a widget by ID.
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103 *
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104 * Should $(I only) be called internally and by sub-widgets! */
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105 IWidget makeWidget (widgetID i, IWidget parent)
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106 in {
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107 // widgetData is normally left to be garbage collected after widgets have been created:
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108 assert (widgetData !is null, "Window.makeWidget ("~name~"): widgetData is null");
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109 } body {
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110 // See if it's already been created:
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111 IWidget* p = i in widgets;
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112 if (p !is null) { // yes
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113 char[128] tmp;
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114 logger.warn (logger.format (tmp, "Window.makeWidget ("~name~"): widget {} has multiple uses!", i));
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115 return *p;
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116 }
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117 else { // no
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118 int[]* d = i in widgetData;
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119 if (d is null) throw new WindowLoadException ("Window.makeWidget ("~name~"): Widget not found");
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120
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121 // Throws WidgetDataException (a WindowLoadException) if bad data:
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122 IWidget widg = createWidget (this, parent, *d);
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123 widgets[i] = widg;
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124 return widg;
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125 }
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126 }
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127
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128 IGui gui () {
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129 return gui_;
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130 }
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131
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132 /+void requestRedraw () {
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133 }+/
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134
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135 IRenderer renderer () {
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136 return rend;
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137 }
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138 //END IWindow methods
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139
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140 //BEGIN IWidget methods
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141 void getMinimumSize (out int w, out int h) {
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142 widget.getMinimumSize (x,y);
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143 w += rend.windowBorder * 2; // Adjust for border
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144 h += rend.windowBorder * 2;
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145 }
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146 void getCurrentSize (out int cw, out int ch) {
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147 cw = w;
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148 ch = h;
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149 }
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150
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151 void setPosition (int x, int y) {
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152 /+ Note: this is currently unused. Maybe only use it internally?
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153 this.x = x;
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154 this.y = y;
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155
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156 widgetX = x + rend.windowBorder;
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157 widgetY = y + rend.windowBorder;
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158
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159 widget.setPosition (widgetX, widgetY);
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160 +/
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161 }
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162
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163 IWidget getWidget (int cx, int cy) {
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164 if (cx < x || cx >= xw || cy < y || cy >= yh) // not over window
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165 return null;
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166 if (cx >= widgetX && cx < xw-rend.windowBorder && cy >= widgetY && cy < yh-rend.windowBorder)
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167 // over the widget
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168 return widget.getWidget (cx, cy);
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169 else // over the window border
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170 return this;
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171 }
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172 void clickEvent (ushort cx, ushort cy, ubyte b, bool state) {
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173 //if (cx >= x && cx < xw && cy >= y && cy < yh) { // click on window?
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174 // FIXME: repositioning?
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175 }
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176
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177 void draw () {
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178 // background
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179 rend.drawWindow (x,y, w,h);
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180
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181 // Tell the widget to draw itself:
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182 widget.draw();
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183 }
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184 //END IWidget methods
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185
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186 private:
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187 char[] name; // The window's name (id from config file)
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188 IGui gui_; // The gui managing this window
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189
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190 int[][widgetID] widgetData; // Data for all widgets under this window (deleted after loading)
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191 IWidget[widgetID] widgets; // List of all widgets under this window (created on demand).
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192 IWidget widget; // The primary widget in this window.
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193
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194 IRenderer rend; // The window's renderer
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195 // FIXME: revise which parameters are stored once Gui knows window position
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196 int x,y; // Window position
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197 int w,h; // Window size (calculated from Widgets)
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198 int xw, yh; // x+w, y+h (frequent use by clickEvent)
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199 int widgetX, widgetY; // Widget position (= window position plus BORDER_WIDTH)
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200 }