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annotate mde/gui/widget/Widget.d @ 58:d43523ed4b62

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Included a wdim typedef for all variables to do with window position or size instead of just using int.
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 14 Jun 2008 17:15:06 +0100
parents 03fa79a48c48
children 891211f034f2
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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 *
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18 * This module contains some base widget classes suitable for widget classes to inherit. However,
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19 * inheriting one of them is by no means necessary for a widget so long as the IWidget interface is
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20 * implemented. */
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21 module mde.gui.widget.Widget;
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22
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23 public import mde.gui.widget.Ifaces;
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24 import mde.gui.renderer.IRenderer;
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25
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26 /** An abstract base widget class.
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27 *
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28 * This abstract class, and the more concrete FixedWidget and ScalableWidget classes provides a
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29 * useful basic implementation for widgets. Widgets need not inherit these (they only need implement
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30 * IWidget); they are simply provided for convenience and to promote code reuse. */
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31 abstract class Widget : IWidget
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32 {
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33 //BEGIN Load and save
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34 // Base this(). All widgets must check data.length is correct before calling this method.
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35 this (IWindow wind, int[] data) {
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36 window = wind;
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37 widgetType = data[0];
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38 }
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39
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40 // Most widgets don't need to do adjustments based on mutable data, however they usually do
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41 // still need to set their size.
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42 int[] adjust (int[] data) {
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43 setWidth (0,-1);
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44 setHeight (0,-1);
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45 return data;
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46 }
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47
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48 // Widget type should always be the first value. Any widget using extra creation data will need
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49 // to reimplemnt this method.
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50 int[] getCreationData () {
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51 return [widgetType];
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52 }
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53 // Most widgets don't use mutable data.
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54 int[] getMutableData () {
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55 return [];
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56 }
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57 //END Load and save
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59 //BEGIN Size and position
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60 bool isWSizable () { return false; }
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61 bool isHSizable () { return false; }
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63 /* Return minimal/fixed size. */
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64 void getMinimalSize (out wdim a, out wdim b) {
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65 a = mw;
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66 b = mh;
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67 }
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68
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69 void getCurrentSize (out wdim cw, out wdim ch) {
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70 cw = w;
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71 ch = h;
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72 }
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74 /* Set size: minimal size is (mw,mh). Note that both resizable and fixed widgets should allow
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75 * enlarging, so in both cases this is a correct implementation. */
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76 void setWidth (wdim nw, int) {
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77 w = (nw >= mw ? nw : mw);
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78 }
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79 void setHeight (wdim nh, int) {
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80 h = (nh >= mh ? nh : mh);
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81 }
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82
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83 void setPosition (wdim nx, wdim ny) {
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84 x = nx;
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85 y = ny;
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86 }
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87 //END Size and position
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88
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89 //BEGIN Events
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90 /* This method is only called when the location is over this widget; hence for all widgets
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91 * without children this method is valid. */
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92 IWidget getWidget (wdim,wdim) {
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93 return this;
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94 }
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95
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96 /* Dummy event method (suitable for all widgets which don't respond to events). */
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97 void clickEvent (wdabs cx, wdabs cy, ubyte b, bool state) {}
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98 //END Events
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99
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100 /* Basic draw method: draw the background (all widgets should do this). */
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101 void draw () {
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102 window.renderer.drawWidgetBack (x,y, w,h);
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103 }
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104
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105 protected:
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106 final int widgetType; // the type (stored for saving)
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107 IWindow window; // the enclosing window
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108 wdim x, y; // position
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109 wdim w, h; // size
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110 wdim mw = 0, mh = 0; // minimal or fixed size, depending on whether the widget is
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111 // resizible; both types of widgets should actually be expandable.
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112 }
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114 /** A base for fixed-size widgets taking their size from the creation data. */
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115 class FixedWidget : Widget {
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116 // Check data.length is at least 3 before calling!
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117 this (IWindow wind, int[] data) {
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118 mw = cast(wdim) data[1];
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119 mh = cast(wdim) data[2];
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120 super (wind, data);
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121 w = mw;
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122 h = mh;
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123 }
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124
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125 int[] getCreationData () {
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126 return [widgetType, mw, mh];
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127 }
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128 }
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129 /** A base for resizable widgets. */
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130 class SizableWidget : Widget {
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131 // Check data.length is at least 1 before calling!
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132 this (IWindow wind, int[] data) {
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133 super (wind, data);
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134 }
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135
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136 bool isWSizable () { return true; }
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137 bool isHSizable () { return true; }
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138 }