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annotate mde/gui/widget/createWidget.d @ 72:159775502bb4

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The first dynamically generated widget lists, based on Options, are here!
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 05 Jul 2008 18:27:46 +0100
parents 7cab2af4ba21
children 25cb7420dc91
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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 /// GUI Widget module.
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17 module mde.gui.widget.createWidget;
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18
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19 import mde.gui.widget.Ifaces;
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20 import mde.gui.exception : WidgetDataException;
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21
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22 // Widgets to create:
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23 import mde.gui.widget.layout;
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24 import mde.gui.widget.miscWidgets;
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25 import mde.gui.widget.TextWidget;
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26
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27 /** Create a widget of type data[0] (see enum WIDGET_TYPES) for _window window, with initialisation
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28 * data [1..$]. */
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29 IWidget createWidget (IWindow window, int[] data)
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30 in {
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31 assert (window !is null, "createWidget: window is null");
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32 } body {
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33 if (data.length < 1) throw new WidgetDataException ("No widget data");
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34 int type = data[0]; // type is first element of data
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35 // the whole of data is passed to the Widget
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36
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37 mixin (binarySearch ("type", WIDGETS));
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38 throw new WidgetDataException ("Bad widget type");
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39 }
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40
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41 /+ for converting to a char[] name (unused)
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42 static this() {
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43 WIDGET_NAMES = [
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44 FixedBlank : "FixedBlank",
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45 SizableBlank : "SizableBlank",
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46 Button : "Button",
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47 GridLayout : "GridLayout"
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48 ];
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49 }+/
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50
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51 private:
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52 /// Widget types.
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53 enum WIDGET_TYPE : int {
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54 WSIZABLE = 0x1000, // horizontally resizable
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55 HSIZABLE = 0x2000, // vertically resizable
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56 INTERACTIBLE = 0x4000, // any specific interaction
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57 LAYOUT = 0x8000, // is a layout widget (i.e. has sub-widgets)?
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58
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59 // Use widget names rather than usual capitals convention
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60
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61 // blank: 0x1
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62 FixedBlank = 0x1,
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63 SizableBlank = WSIZABLE | HSIZABLE | 0x1,
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64
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65 // buttons: 0x10
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66 Button = INTERACTIBLE | 0x10,
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67
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68 // content: 0x20
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69 Text = 0x21,
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70 Int = 0x22,
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71
72
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72 GridLayout = LAYOUT | WSIZABLE | HSIZABLE | 0x4,
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73 TrialContentLayout = LAYOUT | WSIZABLE | HSIZABLE | 0x5
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74 }
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75
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76 //const char[][int] WIDGET_NAMES;
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77
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78 // Only used for binarySearch algorithm generation; must be ordered by numerical values.
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79 const char[][] WIDGETS = [
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80 "FixedBlank",
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81 "Text",
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82 "Int",
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83 "SizableBlank",
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84 "Button",
72
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85 "GridLayout",
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86 "TrialContentLayout"];
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87
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88 // Purely to add indentation. Could just return "" without affecting functionality.
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89 static char[] indent (uint i) {
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90 char[] ret;
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91 for (; i > 0; --i) ret ~= " ";
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92 // This is not executable at compile time:
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93 //ret.length = i * 4; // number of characters for each indentation
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94 //ret[] = ' '; // character to indent with
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95 return ret;
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96 }
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97 //char[] indent (uint) { return ""; }
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98
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99 /* Generates a binary search algorithm. */
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100 char[] binarySearch (char[] var, char[][] consts, int indents = 0) {
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101 if (consts.length > 3) {
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102 return indent(indents) ~ "if (" ~ var ~ " <= WIDGET_TYPE." ~ consts[$/2 - 1] ~ ") {\n" ~
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103 binarySearch (var, consts[0 .. $/2], indents + 1) ~
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104 indent(indents) ~ "} else {\n" ~
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105 binarySearch (var, consts[$/2 .. $], indents + 1) ~
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106 indent(indents) ~ "}\n";
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107 } else {
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108 char[] ret;
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109 ret ~= indent(indents);
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110 foreach (c; consts) {
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111 ret ~= "if (" ~ var ~ " == WIDGET_TYPE." ~ c ~ ") {\n" ~
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112 indent(indents+1) ~ "return new " ~ c ~ "Widget (window, data);\n" ~
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113 indent(indents) ~ "} else ";
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114 }
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115 ret = ret[0..$-6] ~ '\n'; // remove last else
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116 return ret;
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117 }
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118 }