Mercurial > projects > mde
annotate mde/gui/widget/layout.d @ 105:08651e8a8c51
Quit button, big changes to content system.
Moved mde.gui.content to mde.content to reflect it's not only used by the gui.
Split Content module into Content and AStringContent.
New AContent and EventContent class.
Callbacks are now generic and implemented in AContent.
Renamed TextContent to StringContent and ValueContent to AStringContent.
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Sat, 29 Nov 2008 12:36:39 +0000 |
parents | 42e241e7be3e |
children | 2a1428ec5344 |
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 /// Gui layout widgets. |
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17 module mde.gui.widget.layout; |
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18 |
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19 import mde.gui.widget.Widget; |
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20 import mde.gui.exception; |
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21 |
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22 import mde.content.Content; |
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23 |
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24 import tango.util.container.HashMap; |
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25 |
43
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Column/row resizing implemented for GridLayoutWidget (finally)!
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26 debug { |
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27 import tango.util.log.Log : Log, Logger; |
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28 private Logger logger; |
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29 static this () { |
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30 logger = Log.getLogger ("mde.gui.widget.layout"); |
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31 } |
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32 } |
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33 |
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34 /************************************************************************************************* |
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35 * Encapsulates a grid of Widgets. |
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36 * |
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37 * Currently there is no support for changing number of cells, sub-widgets or sub-widget properties |
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38 * (namely isW/HSizable and minimal size) after this() has run. |
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39 * |
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40 * Since a grid with either dimension zero is not useful, there must be at least one sub-widget. |
77c7d3235114
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41 * |
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42 * The grid has no border but has spacing between widgets. |
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43 *************************************************************************************************/ |
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44 class GridLayoutWidget : GridWidget |
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45 { |
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Changes to widgets: widgets may now get strings as creation data. Strings for TextWidgets can be set in files (in a temporary mannor).
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46 /** Constructor for a grid layout widget. |
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47 * |
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48 * Widget uses the initialisation data: |
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49 * --- |
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50 * ints = [widget_type, align_flags, rows, cols] |
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51 * // or with column widths and row heights: |
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52 * ints = [widget_type, align_flags, rows, cols, col1width, ..., colCwidth, row1height, ..., rowRheight] |
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53 * strings = [w11, w12, ..., w1C, ..., wR1, ..., wRC] |
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54 * --- |
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55 * where R and C are the number of rows and columns, and wij is the ID (from parent Window's |
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56 * list) for the widget in row i and column j. The number of parameters must be r*c + 3. |
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57 * |
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58 * The content parameter is passed on to all children accepting an IContent. */ |
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59 this (IWidgetManager mgr, widgetID id, WidgetData data, IContent content) { |
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60 // Get grid size and check data |
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61 // Check sufficient data for type, align-flags, rows, cols, and possibly row/col widths. |
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62 if (data.ints.length != 4) throw new WidgetDataException (this); |
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63 |
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64 rows = data.ints[2]; |
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65 cols = data.ints[3]; |
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66 // Check: at least one sub-widget, ints length == 3, strings' length is correct: |
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67 if (rows < 1 || cols < 1 || data.ints.length != 4 || data.strings.length != rows * cols) |
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68 throw new WidgetDataException (this); |
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69 |
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70 // Get all sub-widgets |
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71 subWidgets.length = rows*cols; |
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72 foreach (i, ref subWidget; subWidgets) { |
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73 subWidget = mgr.makeWidget (data.strings[i], content); |
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74 } |
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75 |
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76 initWidths = mgr.dimData (id); // may be null, tested later |
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77 |
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78 super (mgr, id, data); |
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79 } |
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80 |
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81 // Save column/row sizes. Currently always do so. |
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82 bool saveChanges () { |
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83 foreach (widget; subWidgets) // recurse on subwidgets |
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84 widget.saveChanges (); |
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85 |
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86 mgr.setDimData (id, col.width ~ row.width); |
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87 return true; |
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88 } |
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89 protected: |
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90 } |
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91 |
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92 |
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93 /************************************************************************************************* |
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ContentList content type; getting content items/lists from Options generically via content.Items, and a new addContent widget function. Several improvements to generic handling of content. New button-with-text widget.
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94 * Iterates on an ContentList to produce a list of widgets, each of which is created with widgetID |
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95 * data.strings[0]. If an IContent is passed, this is cast to a ContentList, otherwise |
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ContentList content type; getting content items/lists from Options generically via content.Items, and a new addContent widget function. Several improvements to generic handling of content. New button-with-text widget.
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96 * content.Items is used to get an IContent. It is an error if the content fails to cast to |
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97 * ContentList. |
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98 *************************************************************************************************/ |
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99 class ContentListWidget : GridWidget |
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100 { |
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101 this (IWidgetManager mgr, widgetID id, WidgetData data, IContent content) { |
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102 debug scope (failure) |
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103 logger.warn ("TrialContentLayoutWidget: failure"); |
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104 WDCheck (data, 2, 1); |
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105 |
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106 cList = cast(ContentList) content; |
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107 if (cList is null) |
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108 throw new ContentException; |
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109 |
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110 cols = 1; |
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111 if ((rows = cList.list.length) > 0) { |
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112 subWidgets.length = rows; |
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113 foreach (i, c; cList.list) { |
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114 subWidgets[i] = mgr.makeWidget (data.strings[0], c); |
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115 } |
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116 } else { |
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117 rows = 1; |
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118 subWidgets = [mgr.makeWidget (data.strings[0], new ErrorContent ("<empty list>"))]; |
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119 } |
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120 super (mgr, id, data); |
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121 } |
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122 |
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123 bool saveChanges () { |
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124 // Since all sub-widgets have the same id, it only makes sense to call on one |
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125 if (subWidgets is null) |
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126 return false; |
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127 return subWidgets[0].saveChanges; |
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128 } |
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129 |
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130 private: |
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131 ContentList cList; |
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132 } |
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133 |
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134 |
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135 /************************************************************************************************* |
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136 * Backend for grid-based (includes column/row) layout widgets. |
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137 * |
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138 * A deriving class must at least do some work in it's constructor (see Ddoc for this() below) |
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139 * and provide an implementation of getCreationData() (unless Widget's version is sufficient). |
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140 * |
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141 * Since a grid with either dimension zero is not useful, there must be at least one sub-widget. |
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142 * |
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143 * The grid has no border but has spacing between widgets. |
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144 *************************************************************************************************/ |
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145 abstract class GridWidget : AParentWidget |
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146 { |
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147 //BEGIN Creation & saving |
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148 /** Partial constructor for a grid layout widget. |
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149 * |
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150 * Deriving classes should check data lengths, and set rows, cols, and the subWidgets array, |
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151 * before calling this super constructor. (If it's necessary to call super(...) first, |
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152 * the call to genCachedConstructionData can be moved to the derived this() methods.) |
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153 * |
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154 * Derived constructors may also set initWidths to the array of column widths followed by |
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155 * row heights used to initially set the row/column dimensions. |
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156 * |
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157 * Sub-widgets are finalized here, so no methods should be called on sub-widgets before calling |
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158 * this super. */ |
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159 protected this (IWidgetManager mgr, widgetID id, WidgetData data) { |
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160 super (mgr, id, data); |
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161 |
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162 // Create cell aligners with appropriate col/row adjustment function |
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163 if (data.ints[1] & 1) |
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164 col = AlignColumns.getInstance (id, cols); |
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165 else |
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166 col = (new AlignColumns (cols)); |
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167 col.addSetCallback (&setColWidth); |
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168 if (data.ints[1] & 2) |
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169 row = AlignColumns.getInstance (id~"R", rows); // id must be unique to that for cols! |
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170 else |
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171 row = (new AlignColumns (rows)); |
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172 row.addSetCallback (&setRowHeight); |
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173 } |
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174 |
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175 /** Prior to finalizing but after sub-widgets are finalized, some information needs to be |
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176 * passed to the AlignColumns. */ |
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177 void prefinalize () { |
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178 genCachedConstructionData; // min widths, sizableness |
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179 } |
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180 |
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181 /** Responsible for calculating the minimal size and initializing some stuff. |
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182 * |
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183 * As such, this must be the first function called after this(). */ |
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184 void finalize () { |
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185 if (initWidths.length == cols + rows) { |
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186 col.setWidths (initWidths[0..cols]); |
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187 row.setWidths (initWidths[cols..$]); |
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188 } else { |
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189 col.setWidths; |
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190 row.setWidths; |
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191 } |
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192 initWidths = null; // free |
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193 |
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194 mw = col.mw; |
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195 mh = row.mw; |
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196 w = col.w; |
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197 h = row.w; |
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198 |
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199 // Tell subwidgets their new sizes. Positions are given by a later call to setPosition. |
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200 foreach (i,widget; subWidgets) { |
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201 // Resizing direction is arbitrarily set to negative: |
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202 widget.setWidth (col.width[i % cols], -1); |
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203 widget.setHeight (row.width[i / cols], -1); |
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204 } |
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205 } |
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206 //END Creation & saving |
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207 |
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208 //BEGIN Size & position |
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209 bool isWSizable () { |
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210 return col.firstSizable >= 0; |
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211 } |
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212 bool isHSizable () { |
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213 return row.firstSizable >= 0; |
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214 } |
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215 |
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216 void setWidth (wdim nw, int dir) { |
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217 w = col.resizeWidth (nw, dir); |
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218 // Note: setPosition must be called after! |
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219 } |
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220 void setHeight (wdim nh, int dir) { |
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221 h = row.resizeWidth (nh, dir); |
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222 // Note: setPosition must be called after! |
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223 } |
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224 |
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225 void setPosition (wdim x, wdim y) { |
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226 this.x = x; |
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227 this.y = y; |
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228 |
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229 debug assert (col.pos && row.pos, "setPosition: col/row.pos not set (code error)"); |
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230 foreach (i,widget; subWidgets) |
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231 widget.setPosition (x + col.pos[i % cols], y + row.pos[i / cols]); |
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232 } |
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233 //END Size & position |
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234 |
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235 |
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236 // Find the relevant widget. |
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237 IChildWidget getWidget (wdim cx, wdim cy) { |
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238 debug scope (failure) |
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239 logger.warn ("getWidget: failure; values: click, pos, width - {}, {}, {} - {}, {}, {}", cx, x, w, cy, y, h); |
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240 debug assert (cx >= x && cx < x + w && cy >= y && cy < y + h, "getWidget: not on widget (code error)"); |
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241 |
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242 // Find row/column: |
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243 myDiff i = col.getCell (cx - x); |
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244 myDiff j = row.getCell (cy - y); |
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245 if (i < 0 || j < 0) // on a space between widgets |
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246 return this; |
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247 |
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248 // On a subwidget; recurse call: |
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249 return subWidgets[i + j*cols].getWidget (cx, cy); |
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250 } |
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251 |
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252 // Resizing columns & rows |
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253 int clickEvent (wdabs cx, wdabs cy, ubyte b, bool state) { |
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254 debug scope (failure) |
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255 logger.warn ("clickEvent: failure"); |
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256 if (b == 1 && state == true) { |
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257 /* Note: Because of getWidget, this function is only called if the click is not on a |
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258 * sub-widget, so we know it's on some divisor (so at least one of resizeCol and |
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259 * resizeRow is non-negative). */ |
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260 |
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261 // find col/row's resizeD & resizeU |
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262 if (col.findResizeCols (cx - x) && row.findResizeCols (cy - y)) |
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263 return 0; // unable to resize |
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264 |
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265 dragX = cx; |
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266 dragY = cy; |
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267 |
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268 mgr.addClickCallback (&endCallback); |
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269 mgr.addMotionCallback (&resizeCallback); |
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270 } |
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271 return 0; |
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272 } |
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273 |
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274 void draw () { |
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275 super.draw (); |
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276 |
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277 foreach (widget; subWidgets) |
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278 widget.draw (); |
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279 } |
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280 |
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281 package: |
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282 /* Calculations which need to be run whenever a new sub-widget structure is set |
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283 * (i.e. to produce cached data calculated from construction data). |
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284 * Also need to be re-run if the renderer changes. |
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285 * |
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286 * rows, cols and subWidgets must be set before calling. Part of the set-up for AlignColumns |
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287 * (col and row). subWidgets need to know their minimal size and resizability. */ |
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288 void genCachedConstructionData () { |
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289 // Will only change if renderer changes: |
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290 // NOTE shared AlignColumns get this set by all sharing GridWidgets |
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291 col.spacing = row.spacing = mgr.renderer.layoutSpacing; |
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292 |
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293 // Calculate the minimal column and row sizes: |
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294 // AlignColumns (row, col) takes care of initializing minWidth. |
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295 foreach (i,widget; subWidgets) { |
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296 // Increase dimensions if current minimal size is larger: |
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297 myIt n = i % cols; // column |
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298 wdim md = widget.minWidth; |
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299 if (col.minWidth[n] < md) col.minWidth[n] = md; |
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300 n = i / cols; // row |
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301 md = widget.minHeight; |
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302 if (row.minWidth[n] < md) row.minWidth[n] = md; |
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303 } |
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304 |
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305 // Find which cols/rows are resizable: |
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306 // AlignColumns initializes sizable, and sets first and last sizables. |
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307 forCols: |
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308 for (myIt i = 0; i < cols; ++i) { // for each column |
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309 for (myIt j = 0; j < subWidgets.length; j += cols) // for each row |
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310 if (!subWidgets[i+j].isWSizable) // column not resizable |
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311 continue forCols; // continue the outer for loop |
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312 |
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313 // column is resizable if we get to here |
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314 col.sizable[i] = true; |
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315 } |
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316 |
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317 forRows: |
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318 for (myIt i = 0; i < subWidgets.length; i += cols) { // for each row |
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319 for (myIt j = 0; j < cols; ++j) // for each column |
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320 if (!subWidgets[i+j].isHSizable) |
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321 continue forRows; |
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322 |
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323 row.sizable[i / cols] = true; |
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324 } |
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325 } |
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326 |
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327 private: |
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328 void setColWidth (myIt i, wdim w, int dir) { |
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329 for (myIt j = 0; j < rows; ++j) { |
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330 subWidgets[i + cols*j].setWidth (w, dir); |
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331 } |
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332 } |
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333 void setRowHeight (myIt j, wdim h, int dir) { |
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334 for (myIt i = 0; i < cols; ++i) { |
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335 subWidgets[i + cols*j].setHeight (h, dir); |
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336 } |
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337 } |
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338 |
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339 |
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340 //BEGIN Col/row resizing callback |
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341 void resizeCallback (wdim cx, wdim cy) { |
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342 col.resizeCols (cx - dragX); |
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343 row.resizeCols (cy - dragY); |
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344 |
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345 // NOTE: all adjustments are relative; might be better if they were absolute? |
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346 dragX = cx; |
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347 dragY = cy; |
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348 |
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349 foreach (i,widget; subWidgets) |
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350 widget.setPosition (x + col.pos[i % cols], |
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351 y + row.pos[i / cols]); |
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352 mgr.requestRedraw; |
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353 } |
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354 bool endCallback (wdabs cx, wdabs cy, ubyte b, bool state) { |
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355 if (b == 1 && state == false) { |
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356 mgr.removeCallbacks (cast(void*) this); |
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357 return true; // we've handled the up-click |
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358 } |
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359 return false; // we haven't handled it |
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360 } |
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361 |
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362 protected: |
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363 // Data for resizing cols/rows: |
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364 wdim dragX, dragY; // coords where drag starts |
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365 //END Col/row resizing callback |
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366 |
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367 myIt cols, rows; // number of cells in grid |
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368 wdim[] initWidths; // see this / setInitialSize |
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369 |
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370 /* All widgets in the grid, by row. Order: [ 0 1 ] |
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371 * [ 2 3 ] */ |
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372 //IChildWidget[] subWidgets; |
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373 |
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374 AlignColumns col, row; |
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375 } |
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376 |
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377 |
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378 /************************************************************************************************** |
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379 * Alignment device |
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380 * |
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381 * E.g. can control widths of columns within a grid, and provide sensible resizing, respecting the |
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382 * minimal width required by each cell in a column. Is not restricted to horizontal widths, but to |
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383 * ease descriptions, a horizontal context (column widths) is assumed. |
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384 * |
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385 * Cells should be of type IChildWidget. |
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386 * |
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387 * Cells are not directly interacted with, but minimal widths for each column are passed, and |
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388 * callback functions are used to adjust the width of any column. |
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389 *************************************************************************************************/ |
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390 package class AlignColumns |
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391 { |
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392 /** Instance returned will be shared with any other widgets of same widgetID. |
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393 * |
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394 * Also ensures each widget sharing an instance expects the same number of columns. */ |
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395 static AlignColumns getInstance (widgetID id, myIt columns) { |
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396 AlignColumns* p = id in instances; |
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397 if (p) { |
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398 if (p.minWidth.length != columns) |
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399 throw new GuiException ("AlignColumns: no. of columns varies between sharing widgets (code error)"); |
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400 //logger.trace ("Shared alignment for: "~id); |
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401 return *p; |
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402 } else { |
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403 auto a = new AlignColumns (columns); |
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404 instances[id] = a; |
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405 return a; |
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406 } |
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407 } |
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408 |
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409 /** Create an instance. After creation, the number of columns can only be changed by calling |
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410 * reset. |
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411 * |
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412 * After creation, minimal widths should be set for all columns (minWidth) and |
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413 * setWidths must be called before other functions are used. */ |
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414 this (myIt columns) { |
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415 reset (columns); |
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416 } |
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417 |
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418 /** Reset all column information (only keep set callbacks). |
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419 * |
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420 * Widths should be set after calling, as on creation. */ |
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421 void reset (myIt columns) { |
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422 if (columns < 1) |
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423 throw new GuiException("AlignColumns: created with <1 column (code error)"); |
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424 minWidth = new wdim[columns]; |
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425 sizable = new bool[columns]; |
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426 width = null; // enforce calling setWidths after this |
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427 firstSizable = -1; |
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428 lastSizable = -1; |
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429 } |
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430 |
95
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431 /** Initialize widths, either from minWidths or from supplied list, checking validity. |
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432 * |
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433 * Also calculates first/lastSizable from sizable, overall minimal width and column positions. |
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434 */ |
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435 void setWidths (wdim[] data = null) { |
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436 if (!width) { |
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437 if (data) { |
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438 debug assert (data.length == minWidth.length, "setWidths called with bad data length (code error)"); |
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439 width = data.dup; // data is shared by other widgets with same id so must be .dup'ed |
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440 // And check sizes are valid: |
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441 foreach (i, m; minWidth) { |
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442 if (!sizable[i] || width[i] < m) // if width is fixed or less than minimum |
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443 width[i] = m; |
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444 } |
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445 } else |
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446 width = minWidth.dup; |
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447 |
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448 /* Calculate the minimal width of all columns plus spacing. */ |
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449 mw = spacing * cast(wdim)(minWidth.length - 1); |
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450 foreach (imw; minWidth) |
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451 mw += imw; |
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452 |
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Boolean options can be adjusted from the gui now (using a very basic widget). Also some bug-fixes.
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453 genPositions; |
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Boolean options can be adjusted from the gui now (using a very basic widget). Also some bug-fixes.
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454 |
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455 foreach (i,s; sizable) { |
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456 if (s) { |
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457 firstSizable = i; |
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458 goto gotFirst; |
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459 } |
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460 } |
95
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461 return; // none resizable - don't search for lastSizable |
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462 gotFirst: |
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463 foreach_reverse (i,s; sizable) { |
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464 if (s) { |
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465 lastSizable = i; |
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466 return; // done |
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467 } |
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468 } |
91
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Shared alignment for dynamic content lists - finally implemented! Lots of smaller changes too.
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469 } |
90
b525ff28774b
Widgets generated dynamically from a list can now be standard widgets selected from data files.
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470 } |
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471 |
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472 /** Add a callback to be called to notify changes in a column's width. |
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473 * |
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474 * All callbacks added are called on a width change so that multiple objects may share a |
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475 * CellAlign object. */ |
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476 typeof(this) addSetCallback (void delegate (myIt,wdim,int) setCW) { |
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477 assert (setCW, "CellAlign.this: setCW is null (code error)"); |
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478 setWidthCb ~= setCW; |
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479 return this; |
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480 } |
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481 |
91
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482 /** Get the row/column of relative position l. |
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483 * |
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484 * returns: |
95
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485 * -i if in space to left of col i, or i if on col i. */ |
90
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486 myDiff getCell (wdim l) { |
95
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487 debug assert (width, "AlignColumns not initialized when getCell called (code error)"); |
90
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488 myDiff i = minWidth.length - 1; // starting from right... |
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489 while (l < pos[i]) { // decrement while left of this column |
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490 debug assert (i > 0, "getCell: l < pos[0] (code error)"); |
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491 --i; |
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492 } // now (l >= pos[i]) |
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493 if (l >= pos[i] + width[i]) { // between columns |
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494 debug assert (i+1 < minWidth.length, "getCell: l >= total width (code error)"); |
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495 return -i - 1; // note: i might be 0 so cannot just return -i |
45
0fd51d2c6c8a
Several changes to resising windows and layout widgets. This commit still has some bugs.
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|
496 } |
90
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497 return i; |
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498 } |
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499 |
91
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500 /** Adjust total size with direction dir. |
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501 * |
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502 * nw should be at least the minimal width. */ |
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503 wdim resizeWidth (wdim nw, int dir) { |
95
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504 debug assert (width, "AlignColumns not initialized when resizeWidth called (code error)"); |
91
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505 if (nw < mw) { |
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506 debug logger.warn ("Widget dimension set below minimal"); |
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507 nw = mw; |
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508 } |
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Shared alignment for dynamic content lists - finally implemented! Lots of smaller changes too.
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509 if (nw == w) return w; |
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Shared alignment for dynamic content lists - finally implemented! Lots of smaller changes too.
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|
510 |
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511 wdim diff = nw - w; |
95
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512 if (firstSizable == -1) |
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513 diff = adjustCellSizes (diff, minWidth.length-1, -1); |
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514 else |
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515 diff = adjustCellSizes (diff, (dir == -1 ? lastSizable : firstSizable), dir); |
91
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516 |
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517 debug if (nw != w) { |
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518 logger.trace ("resizeWidth on {} to {} failed, new width: {}, diff {}, firstSizable {}, columns {}",cast(void*)this, nw,w, diff, firstSizable, minWidth.length); |
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519 /+ Also print column widths & positions: |
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520 logger.trace ("resizeWidth to {} failed! Column dimensions and positions:",nw); |
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521 foreach (i,w; width) |
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522 logger.trace ("\t{}\t{}", w,pos[i]);+/ |
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523 } |
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524 return w; |
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525 } |
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526 |
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527 /** Calculate resizeU/resizeD, and return true if unable to resize. |
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528 * |
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529 * This and resizeCols are for moving dividers between cells. */ |
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530 bool findResizeCols (wdim l) { |
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531 resizeU = -getCell (l); // potential start for upward-resizes |
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532 if (resizeU <= 0) |
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533 return true; // not on a space between cells |
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534 resizeD = resizeU - 1; // potential start for downward-resizes |
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535 |
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536 while (!sizable[resizeU]) { // find first actually resizable column (upwards) |
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537 ++resizeU; |
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538 if (resizeU >= minWidth.length) { // cannot resize |
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539 resizeU = -1; |
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540 return true; |
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541 } |
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542 } |
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543 |
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544 while (!sizable[resizeD]) { // find first actually resizable column (downwards) |
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545 --resizeD; |
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546 if (resizeD < 0) { // cannot resize |
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547 resizeU = -1; // resizeU is tested to check whether resizes are possible |
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548 return true; |
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549 } |
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550 } |
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551 |
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552 return false; // can resize |
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553 } |
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554 /// Resize columns based on findResizeCols |
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555 void resizeCols (wdim diff) |
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556 { |
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557 if (resizeU <= 0) return; |
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558 |
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559 // do shrinking first (in case we hit the minimum) |
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560 if (diff >= 0) { |
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561 diff = -adjustCellSizes (-diff, resizeU, 1); |
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562 adjustCellSizes (diff, resizeD, -1); |
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563 } else { |
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564 diff = -adjustCellSizes (diff, resizeD, -1); |
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565 adjustCellSizes (diff, resizeU, 1); |
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566 } |
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567 } |
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568 |
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569 /* Generate position infomation for each column and set w. */ |
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570 private void genPositions () { |
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571 pos.length = minWidth.length; |
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572 |
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573 w = 0; |
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574 foreach (i, cw; width) { |
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575 pos[i] = w; |
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576 w += cw + spacing; |
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577 } |
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578 w -= spacing; |
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579 } |
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580 |
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581 /* Adjust the total size of rows/columns (including spacing) by diff. |
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582 * |
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583 * Params: |
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584 * diff = amount to increase/decrease the total size |
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585 * start= index for col/row to start resizing on |
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586 * incr = direction to resize in (added to index each step). Must be either -1 or +1. |
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587 * |
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588 * Returns: |
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589 * The amount adjusted. This may be larger than diff, since cellD is clamped by cellDMin. |
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590 * |
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591 * Note: Check variable used for start is valid before calling! If a non-sizable column's |
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592 * index is passed, this should get increased (if diff > 0) but not decreased. |
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593 */ |
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594 private wdim adjustCellSizes (wdim diff, myDiff start, int incr) |
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595 in { |
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596 assert (width.length == minWidth.length, "CellAlign.adjustCellSizes: width is null (code error)"); |
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597 // Most likely if passed negative when sizing is disabled: |
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598 assert (start >= 0 && start < minWidth.length, "adjustCellSizes: invalid start"); |
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599 debug assert (incr == 1 || incr == -1, "adjustCellSizes: invalid incr"); |
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600 } body { |
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601 debug scope(failure) logger.trace ("adjustCellSizes: failure"); |
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602 myDiff i = start; |
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603 if (diff > 0) { // increase size of first resizable cell |
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604 width[i] += diff; |
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605 foreach (dg; setWidthCb) |
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606 dg(i, width[i], incr); |
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607 } |
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608 else if (diff < 0) { // decrease |
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609 wdim rd = diff; // running diff |
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610 aCSwhile: |
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611 while (true) { |
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612 width[i] += rd; // decrease this cell's size (but may be too much) |
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613 rd = width[i] - minWidth[i]; |
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614 if (rd >= 0) { // OK; we're done |
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615 foreach (dg; setWidthCb) |
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616 dg(i, width[i], incr); |
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617 break; // we hit the mark exactly: diff is correct |
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618 } |
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619 |
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620 // else we decreased it too much! |
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621 width[i] = minWidth[i]; |
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622 foreach (dg; setWidthCb) |
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623 dg(i, width[i], incr); |
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624 // rd is remainder to decrease by |
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625 |
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626 do { |
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627 i += incr; |
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628 if (i < 0 || i >= minWidth.length) { // run out of next cells |
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629 diff -= rd; // still had rd left to decrease |
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630 break aCSwhile; // exception: Array index out of bounds |
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631 } |
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632 } while (!sizable[i]) // iterate again if row/col isn't resizable |
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633 } |
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634 } |
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635 // else no adjustment needed (diff == 0) |
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636 |
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637 genPositions; |
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638 return diff; |
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639 } |
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640 |
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641 /** Minimal width for each column. |
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642 * |
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643 * Initialized to zero. Each class using this AlignColumns should, for each column, increase |
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644 * this value to the maximum of the minimal widths (in other words, set |
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645 * minWidth[i] = max(minWidth[i], cell.minWidth) for each cell in column i). */ |
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646 wdim[] minWidth; // minimal widths (set by genCachedConstructionData) |
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647 |
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648 /** For each column i, sizable[i] is true if that column is resizable. |
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649 * |
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650 * Set along with minWidth before calling setWidths. */ |
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651 bool[] sizable; // set by genCachedConstructionData |
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652 |
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653 /** Current width, relative position (for each column) |
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654 * |
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655 * Treat as READ ONLY outside this class! */ |
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656 wdim[] width; // only adjusted within the class |
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657 wdim[] pos; /// ditto |
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658 protected: |
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659 myDiff resizeD, // resizeCols works down from this index (<0 if not resizing) |
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660 resizeU; // and up from this index |
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661 wdim spacing; // used by genPositions (which cannot access the layout class's data) |
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662 wdim w,mw; // current & minimal widths |
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663 /* indicies of the first/last resizable column (negative if none are resizable). */ |
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664 myDiff firstSizable = -1, lastSizable = -1; // set by calcFLSbl |
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665 // Callbacks used to actually adjust a column's width: |
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666 void delegate (myIt,wdim,int) setWidthCb[]; // set width of a column, with resize direction |
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667 |
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668 static HashMap!(widgetID,AlignColumns) instances; |
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669 static this () { |
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670 instances = new HashMap!(widgetID,AlignColumns); |
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671 } |
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672 } |
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673 |
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674 // Index types. Note that in some cases they need to hold negative values. |
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675 // int is used for resizing direction (although ptrdiff_t would be more appropriate), |
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676 // since the value must always be -1 or +1. |
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677 alias size_t myIt; |
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678 alias ptrdiff_t myDiff; |