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annotate libgui/graphics/ListBoxControl.cc @ 20509:7d8ec197b08b

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Scroll list view to display selection (bug #45848) * LisboxControl.cc (updateSelection, ListBoxControl::ListBoxControl): scroll to item after selection.
author Pantxo Diribarne <pantxo.diribarne@gmail.com>
date Tue, 01 Sep 2015 19:05:57 +0200
parents f0e61a67ad9f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2
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3 Copyright (C) 2011-2015 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <QListWidget>
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28
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29 #include "Container.h"
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30 #include "ListBoxControl.h"
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31 #include "QtHandlesUtils.h"
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32
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33 namespace QtHandles
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34 {
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35
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36 static void
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37 updateSelection (QListWidget* list, const Matrix& value)
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38 {
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39 octave_idx_type n = value.numel ();
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40 int lc = list->count ();
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41
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42 list->clearSelection ();
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43
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44 for (octave_idx_type i = 0; i < n; i++)
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45 {
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46 int idx = xround (value(i));
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47
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48 if (1 <= idx && idx <= lc)
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49 {
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50 list->item (idx-1)->setSelected (true);
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51 list->scrollToItem (list->item (idx-1));
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52 if (i == 0
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53 && list->selectionMode () == QAbstractItemView::SingleSelection)
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54 break;
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55 }
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56 else
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57 {
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58 // Invalid selection.
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59 list->clearSelection ();
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60 break;
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61 }
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62 }
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63 }
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64
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65 ListBoxControl*
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66 ListBoxControl::create (const graphics_object& go)
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67 {
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68 Object* parent = Object::parentObject (go);
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69
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70 if (parent)
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71 {
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72 Container* container = parent->innerContainer ();
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73
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74 if (container)
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75 return new ListBoxControl (go, new QListWidget (container));
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76 }
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77
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78 return 0;
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79 }
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80
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81 ListBoxControl::ListBoxControl (const graphics_object& go, QListWidget* list)
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82 : BaseControl (go, list), m_blockCallback (false)
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83 {
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84 uicontrol::properties& up = properties<uicontrol> ();
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85
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86 list->addItems (Utils::fromStringVector (up.get_string_vector ()));
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87 if ((up.get_max () - up.get_min ()) > 1)
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88 list->setSelectionMode (QAbstractItemView::ExtendedSelection);
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89 else
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90 list->setSelectionMode (QAbstractItemView::SingleSelection);
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91 Matrix value = up.get_value ().matrix_value ();
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92 if (value.numel () > 0)
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93 {
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94 octave_idx_type n = value.numel ();
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95 int lc = list->count ();
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96
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97 for (octave_idx_type i = 0; i < n; i++)
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98 {
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99 int idx = xround (value(i));
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100
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101 if (1 <= idx && idx <= lc)
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102 {
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103 list->item (idx-1)->setSelected (true);
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104 list->scrollToItem (list->item (idx-1));
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105 if (i == 0 && (list->selectionMode ()
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106 == QAbstractItemView::SingleSelection))
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107 break;
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108 }
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109 }
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110 }
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111
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112 list->removeEventFilter (this);
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113 list->viewport ()->installEventFilter (this);
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114
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115 connect (list, SIGNAL (itemSelectionChanged (void)),
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116 SLOT (itemSelectionChanged (void)));
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117 }
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118
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119 ListBoxControl::~ListBoxControl (void)
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120 {
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121 }
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122
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123 void
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124 ListBoxControl::update (int pId)
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125 {
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126 uicontrol::properties& up = properties<uicontrol> ();
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127 QListWidget* list = qWidget<QListWidget> ();
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128
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129 switch (pId)
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130 {
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131 case uicontrol::properties::ID_STRING:
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132 m_blockCallback = true;
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133 list->clear ();
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134 list->addItems (Utils::fromStringVector (up.get_string_vector ()));
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135 updateSelection (list, up.get_value ().matrix_value ());
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136 m_blockCallback = false;
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137 break;
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138
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139 case uicontrol::properties::ID_MIN:
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140
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141 case uicontrol::properties::ID_MAX:
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142 if ((up.get_max () - up.get_min ()) > 1)
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143 list->setSelectionMode (QAbstractItemView::ExtendedSelection);
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144 else
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145 list->setSelectionMode (QAbstractItemView::SingleSelection);
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146 break;
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147
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148 case uicontrol::properties::ID_VALUE:
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149 m_blockCallback = true;
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150 updateSelection (list, up.get_value ().matrix_value ());
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151 m_blockCallback = false;
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152 break;
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153
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154 default:
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155 BaseControl::update (pId);
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156 break;
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157 }
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158 }
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159
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160 void
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161 ListBoxControl::itemSelectionChanged (void)
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162 {
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163 if (! m_blockCallback)
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164 {
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165 QListWidget* list = qWidget<QListWidget> ();
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166
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167 QModelIndexList l = list->selectionModel ()->selectedIndexes ();
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168 Matrix value (dim_vector (1, l.size ()));
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169 int i = 0;
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170
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171 foreach (const QModelIndex& idx, l)
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172 value(i++) = (idx.row () + 1);
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173
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174 gh_manager::post_set (m_handle, "value", octave_value (value), false);
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175 gh_manager::post_callback (m_handle, "callback");
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176 }
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177 }
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178
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179 }; // namespace QtHandles