Mercurial > projects > mde
annotate mde/gui/widget/AChildWidget.d @ 175:1cbde9807293
Compile/link-time fixes for ldc & non-debug builds.
Moved WidgetManager to widget/
Reverted IChildWidget to an interface, not an abstract class.
Introduced a work-around for a compiler problem. May not cover all cases.
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Fri, 11 Sep 2009 20:56:53 +0200 |
parents | 3d58adc17d20 |
children | d5d5fe04ca6c |
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 * Contains the AChildWidget class, intended for IChildWidgets to inherit. |
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18 * |
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19 * Abstract widget classes have an 'A' prepended to the name, similar to the |
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20 * 'I' convention for interfaces. |
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21 *****************************************************************************/ |
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22 module mde.gui.widget.AChildWidget; |
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23 |
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24 public import mde.gui.widget.Ifaces; |
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25 import mde.content.IContent; |
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26 import mde.gui.exception; |
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27 |
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28 debug { |
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29 import tango.util.log.Log : Log, Logger; |
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30 private Logger logger; |
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31 static this () { |
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32 logger = Log.getLogger ("mde.gui.widget.AChildWidget"); |
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33 } |
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34 } |
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35 |
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36 /****************************************************************************** |
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37 * An abstract base widget class for IChildWidgets. |
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38 * |
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39 * This abstract class, and the more concrete FixedWidget and ScalableWidget |
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40 * classes provides useful basic implementations for widgets. |
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41 *****************************************************************************/ |
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42 abstract class AChildWidget : IChildWidget, IWidget |
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43 { |
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44 //BEGIN Load and save |
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45 // Base this() for child Widgets. |
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46 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) { |
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47 this.mgr = mgr; |
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48 this.parent = parent; |
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49 this.id = id; |
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50 } |
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51 |
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52 // Widgets need to do their initialization either in this() or setup(). |
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53 override bool setup (uint n,uint) { |
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54 return n == 0; |
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55 } |
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56 |
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57 // Don't save any data: fine for many widgets. |
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58 public override bool saveChanges () { |
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59 return false; |
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60 } |
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61 |
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62 // Widgets with content need to override these |
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63 override IContent content () { |
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64 return null; |
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65 } |
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66 override void setContent (IContent) {} |
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67 //END Load and save |
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68 |
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69 //BEGIN Size and position |
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70 // default to not resizable |
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71 override bool isWSizable () { |
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72 return false; |
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73 } |
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74 override bool isHSizable () { |
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75 return false; |
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76 } |
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77 |
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78 /* Return minimal/fixed size. */ |
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79 override wdim minWidth () { |
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80 return mw; |
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81 } |
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82 override wdim minHeight () { |
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83 return mh; |
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84 } |
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85 |
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86 override wdim width () { |
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87 return w; |
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88 } |
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89 override wdim height() { |
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90 return h; |
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91 } |
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92 |
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93 override wdabs xPos () { |
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94 return x; |
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95 } |
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96 override wdabs yPos () { |
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97 return y; |
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98 } |
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99 |
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100 /* Set size: minimal size is (mw,mh). Note that both resizable and fixed widgets should allow |
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101 * enlarging, so in both cases this is a correct implementation. */ |
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102 override void setWidth (wdim nw, int) { |
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103 debug if (nw < mw) logger.warn ("Widget width set below minimal size"); |
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104 w = (nw >= mw ? nw : mw); |
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105 } |
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106 override void setHeight (wdim nh, int) { |
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107 debug if (nh < mh) logger.warn ("Widget height set below minimal size"); |
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108 h = (nh >= mh ? nh : mh); |
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109 } |
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110 |
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111 override void setPosition (wdim nx, wdim ny) { |
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112 x = nx; |
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113 y = ny; |
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114 } |
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115 //END Size and position |
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116 |
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117 //BEGIN Events |
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118 /* This method is only called when the location is over this widget; hence for all widgets |
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119 * without children this method is valid. */ |
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120 override IChildWidget getWidget (wdim cx, wdim cy) { |
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121 debug assert (cx >= x && cx < x + w && cy >= y && cy < y + h, "getWidget: not on widget (code error)"); |
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122 return this; |
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123 } |
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124 |
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125 // Should be valid for any widget. |
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126 override bool onSelf (wdabs cx, wdabs cy) { |
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127 return cx >= x && cx < x + w && cy >= y && cy < y + h; |
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128 } |
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129 |
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130 /* Dummy event method (suitable for all widgets which don't respond to events). */ |
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131 override int clickEvent (wdabs cx, wdabs cy, ubyte b, bool state) { |
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132 return 0; |
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133 } |
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134 |
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135 /* Dummy functions; many widgets don't need to respond to dragging. */ |
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136 override void dragMotion (wdabs cx, wdabs cy, IChildWidget) {} |
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137 override bool dragRelease (wdabs cx, wdabs cy, IChildWidget) { |
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138 return false; // any widgets not handling events should let them be passed as normal to clickEvent |
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139 } |
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140 |
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141 /* Dummy functions: suitable for widgets with no text input. */ |
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142 public override void keyEvent (ushort, char[]) {} |
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143 public override void keyFocusLost () {} |
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144 |
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145 // Called when mouse moves over or off this |
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146 override void underMouse (bool state) {} |
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147 |
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148 public override bool dropContent (IContent content) { |
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149 return parent.dropContent (content); |
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150 } |
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151 |
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152 // Only useful to widgets creating popups. |
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153 protected override void popupClose () {} |
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154 protected override bool popupParentClick () { |
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155 return true; |
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156 } |
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157 //END Events |
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158 |
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159 /* Basic draw method: draw the background (all widgets should do this). */ |
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160 public override void draw () { |
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161 //TODO: possibly enforce all widgets to implement this so their invariant runs: |
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162 //assert (false, "all widgets should override draw"); |
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163 mgr.renderer.drawWidgetBack (x,y, w,h); |
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164 } |
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165 |
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166 // Debug function to print size info. Intended to be correct not optimal. |
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167 debug public override void logWidgetSize () { |
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168 logger.trace ("size: {,4},{,4}; minimal: {,4},{,4}; sizable: {},{} - {,-50} {}", this.width, this.height, this.minWidth, this.minHeight, cast(int)this.isWSizable, cast(int)this.isHSizable, this, id); |
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169 } |
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170 |
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171 protected: |
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172 /************************************************************************** |
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173 * Widgets may use W*Check as a utility to check for existance of data. Its use is encouraged, |
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174 * so that the checks can easily be updated should WidgetData be changed. |
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175 * |
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176 * Variants: |
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177 * WDCheck checks the exact length of integer and string data. |
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178 * WDCCheck checks data as WDCheck and that the content passed is valid. |
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179 * WDCMinCheck does the same as WDCCheck, but allows more data than required (used by some |
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180 * generic widgets). |
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181 * |
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182 * Params: |
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183 * data = the WidgetData to check lengths of |
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184 * n_ints = number of integers wanted |
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185 * n_strings= number of strings (default 0 since not all widgets use strings) |
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186 *************************************************************************/ |
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187 void WDCheck (WidgetData data, size_t n_ints, size_t n_strings = 0) { |
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188 if (data.ints.length != n_ints || |
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189 data.strings.length != n_strings) |
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190 throw new WidgetDataException (this); |
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191 } |
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192 /** ditto */ |
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193 void WDCCheck (WidgetData data, size_t n_ints, size_t n_strings, IContent c) { |
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194 if (data.ints.length != n_ints || |
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195 data.strings.length != n_strings) |
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196 throw new WidgetDataException (this); |
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197 if (c is null) |
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198 throw new ContentException (this); |
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199 } |
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200 /** ditto */ |
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201 void WDCMinCheck (WidgetData data, size_t n_ints, size_t n_strings, IContent c) { |
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202 if (data.ints.length < n_ints || |
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203 data.strings.length < n_strings) |
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204 throw new WidgetDataException (this); |
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205 if (c is null) |
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206 throw new ContentException (this); |
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207 } |
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208 |
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209 /** Hook this function to a Content callback to cause redraws. |
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210 * |
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211 * mgr.requestRedraw could be hooked in directly if the prototype changed. */ |
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212 void contentRedraw (IContent) { |
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213 mgr.requestRedraw; |
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214 } |
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215 |
174
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216 invariant { |
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217 assert (w >= mw); |
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218 assert (h >= mh); |
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219 } |
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220 |
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221 IWidgetManager mgr; // the enclosing window |
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222 IParentWidget parent; // the parent widget |
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223 wdim x, y; // position |
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224 widgetID id; // The widget's ID, used for saving data |
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225 wdim w, h; // size |
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226 wdim mw = 0, mh = 0; // minimal or fixed size, depending on whether the widget is |
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227 // resizible; both types of widgets should actually be expandable. |
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228 } |
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229 |
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230 /** A base for fixed-size widgets taking their size from the creation data. */ |
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231 class FixedWidget : AChildWidget { |
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232 // Check data.length is at least 3 before calling! |
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233 /** Constructor for a fixed-size [blank] widget. |
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234 * |
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235 * Widget uses the initialisation data: |
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236 * [widgetID, w, h] |
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237 * where w, h is the fixed size. */ |
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238 this (IWidgetManager mgr, IParentWidget parent, widgetID id, WidgetData data) { |
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239 super (mgr, parent, id); |
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240 w = mw = cast(wdim) data.ints[1]; |
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241 h = mh = cast(wdim) data.ints[2]; |
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242 } |
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243 } |
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244 |
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245 /** A base for resizable widgets. */ |
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246 class SizableWidget : AChildWidget { |
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247 // Check data.length is at least 1 before calling! |
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248 /// Constructor for a completely resizable [blank] widget. |
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249 this (IWidgetManager mgr, IParentWidget parent, widgetID id) { |
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250 super (mgr, parent, id); |
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251 } |
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252 |
130
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253 override bool isWSizable () { |
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254 return true; |
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255 } |
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256 override bool isHSizable () { |
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257 return true; |
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258 } |
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259 } |
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260 |
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261 /** For pressable buttons. |
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262 * |
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263 * Overriding classes should implement this() (setting the size), draw() and activated(). */ |
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264 abstract class AButtonWidget : AChildWidget |
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265 { |
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266 protected this (IWidgetManager mgr, IParentWidget parent, widgetID id) { |
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267 super (mgr, parent, id); |
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268 parentIPPW = parent.getParentIPPW; |
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269 } |
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270 |
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271 /// May be over-ridden. Pushed is true if the button has been pushed and not released. |
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272 override void draw () { |
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273 mgr.renderer.drawButton (x,y, w,h, pushed); |
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274 } |
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275 |
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276 /// Handles the down-click |
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277 override int clickEvent (wdabs, wdabs, ubyte b, bool state) { |
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278 if (parentIPPW.menuActive && b == 1 || b == 3) { |
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279 parentIPPW.menuDone; |
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280 activated; |
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281 } else if (state && b == 1) { |
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282 pushed = true; |
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283 mgr.requestRedraw; |
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284 return 2; |
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285 } |
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286 return 0; |
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287 } |
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288 |
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289 /// When menuActive, highlight on mouse-over |
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290 override void underMouse (bool state) { |
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291 if (!parentIPPW.menuActive) return; |
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292 pushed = state; |
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293 mgr.requestRedraw; |
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294 } |
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295 |
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296 /// Called when a mouse click event occurs while held; handles up-click |
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297 override bool dragRelease (wdabs cx, wdabs cy, IChildWidget) { |
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298 if (pushed) { // on button |
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299 parentIPPW.menuDone; |
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300 activated(); |
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301 } |
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302 |
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303 pushed = false; |
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304 mgr.requestRedraw; |
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305 |
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306 return true; |
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307 } |
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308 /// Called when a mouse motion event occurs while held; handles pushing in/out on hover |
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309 override void dragMotion (wdabs cx, wdabs cy, IChildWidget target) { |
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310 bool oldPushed = pushed; |
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311 // test against dimensions and not target to include sub-widgets |
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312 if (cx >= x && cx < x+w && cy >= y && cy < y+h) pushed = true; |
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313 else pushed = false; |
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314 if (oldPushed != pushed) |
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315 mgr.requestRedraw; |
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316 } |
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317 |
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318 /// The action triggered when the button is clicked... |
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Temporary commit to allow backup
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319 abstract void activated (); |
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320 |
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321 protected: |
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322 bool pushed = false; /// True if button is pushed in (visually) |
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323 IPopupParentWidget parentIPPW; |
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324 } |