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annotate src/metadataview.cpp @ 28:4e16fbd10945

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(issue3-5) Make the default sort order configurable
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 May 2015 18:46:35 +0200
parents 64a51a42c01f
children f10d4e035eec
rev   line source
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1 /* Copyright (C) 2015 by ETH Zürich
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #include "metadataview.h"
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9 #include "qxtcsvmodel.h"
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10 #include "filterwidget.h"
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11 #include "constants.h"
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12
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13 #include <QTextCodec>
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14 #include <QTableView>
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15 #include <QSortFilterProxyModel>
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16 #include <QVBoxLayout>
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17 #include <QLabel>
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18 #include <QDebug>
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19 #include <QModelIndex>
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20 #include <QHeaderView>
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21 #include <QItemSelectionModel>
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22 #include <QSettings>
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23
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24 MetaDataView::MetaDataView(QWidget *parent, Qt::WindowFlags f) :
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25 QWidget(parent, f) {
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26 /* Create models */
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27 mSortModel = new QSortFilterProxyModel;
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28 mCSVModel = new QxtCsvModel;
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29 setupGUI();
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30
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31 connect(mView->selectionModel(), &QItemSelectionModel::selectionChanged,
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32 this, &MetaDataView::viewSelectionChanged);
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33 connect(mSortModel, &QSortFilterProxyModel::dataChanged,
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34 this, &MetaDataView::dataChanged);
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35 return;
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36 }
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37
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38 void MetaDataView::setupGUI() {
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39 QVBoxLayout *baseLayout = new QVBoxLayout;
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41 FilterWidget *filterWidget = new FilterWidget(mSortModel);
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42 connect(filterWidget, &FilterWidget::filterHasChanged,
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43 this, &MetaDataView::applyDefaultSort);
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44 baseLayout->addWidget(filterWidget);
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45
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46 mView = new QTableView;
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47 mView->setModel(mSortModel);
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48
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49 mView->horizontalHeader()->setStretchLastSection(true);
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50 mView->resizeColumnsToContents();
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51 // mView->setColumnWidth(0, 60);
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52 mView->setSelectionBehavior(QAbstractItemView::SelectRows);
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53 mView->setSelectionMode(QAbstractItemView::SingleSelection);
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54 mView->setSortingEnabled(true);
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55 mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
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56
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57 baseLayout->addWidget(mView);
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58
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59 setLayout(baseLayout);
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60 }
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61
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62 QString MetaDataView::parseMetaData(const QString& filePath) {
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63 mCSVModel->setSource(filePath, true, ';', QTextCodec::codecForName("UTF8"));
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64 if (!mCSVModel->rowCount()) {
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65 return tr("Failed to parse file: '%1'").arg(filePath);
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66 }
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67
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68 mSortModel->setSourceModel(mCSVModel);
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69 qDebug() << "Parsed: " << mCSVModel->rowCount() << " rows.";
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70 applyDefaultSort();
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71 return QString();
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72 }
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73
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74 void MetaDataView::dataChanged()
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75 {
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76 QItemSelectionModel *selection = mView->selectionModel();
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77 QModelIndexList selected = selection->selectedIndexes();
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78
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79 qDebug() << "Data Changed.";
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80 if (selected.isEmpty()) {
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81 /* Nothing selected still we need to emit this signal to update
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82 * the viewer otherwise selection changed handles it. */
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83 emit selectionChanged(QString(), 0, mSortModel->rowCount() - 1,
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84 QDateTime());
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85 }
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86 }
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87
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88 void MetaDataView::viewSelectionChanged(const QItemSelection& selected,
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89 const QItemSelection& deselected) {
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90 if (selected.indexes().isEmpty()) {
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91 /* Nothing selected */
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92 return;
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93 }
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94 /* One row selected */
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95 Q_ASSERT(selected.indexes().count() == mCSVModel->columnCount());
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96 const QModelIndex idx = selected.indexes()[0];
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97 const QString dateString = selected.indexes()[1].data().toString();
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98 bool ok;
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99 qint64 secondsSinceEpoch = dateString.toLongLong(&ok);
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100 if (!ok) {
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101 // TODO emit error
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102 qDebug() << "Unparsable date.";
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103 }
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104 QDateTime timestamp = QDateTime::fromMSecsSinceEpoch(secondsSinceEpoch * 1000);
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105 emit selectionChanged(idx.data().toString(), idx.row(), mSortModel->rowCount() - 1,
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106 timestamp);
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107 qDebug() << "Selection changed: " << idx.data();
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108 }
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109
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110 void MetaDataView::selectRow(int row) {
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111 QItemSelectionModel *selection = mView->selectionModel();
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112 if (!mSortModel->hasIndex(row, 0)) {
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113 qDebug() << "Invalid row: " << row;
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114 return;
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115 }
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116 QModelIndex newIdx = mSortModel->index(row, 0);
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117 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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118 }
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119
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120 void MetaDataView::selectPrevRow() {
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121 QItemSelectionModel *selection = mView->selectionModel();
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122 QModelIndexList selected = selection->selectedIndexes();
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123 int row = 0,
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124 col = 0;
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125 if (selected.isEmpty()) {
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126 qDebug() << "Selection empty. Start at row 0";
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127 if (!mSortModel->hasIndex(row, col)) {
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128 qDebug() << "Empty model. Failed to advance.";
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129 return;
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130 }
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131 } else {
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132 QModelIndex old = selection->selectedIndexes().first();
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133 if (!mSortModel->hasIndex(old.row() - 1, old.column())) {
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134 qDebug() << "No less rows.";
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135 return;
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136 }
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137 row = old.row() - 1;
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138 col = old.column();
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139 }
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140 QModelIndex newIdx = mSortModel->index(row, col);
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141 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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142 }
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143
2
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144 void MetaDataView::selectNextRow() {
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145 QItemSelectionModel *selection = mView->selectionModel();
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146 QModelIndexList selected = selection->selectedIndexes();
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147 int row = 0,
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148 col = 0;
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149 if (selected.isEmpty()) {
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150 qDebug() << "Selection empty. Start at row 0";
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151 if (!mSortModel->hasIndex(row, col)) {
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152 qDebug() << "Empty model. Failed to advance.";
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153 return;
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154 }
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155 } else {
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156 QModelIndex old = selection->selectedIndexes().first();
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157 if (!mSortModel->hasIndex(old.row() + 1, old.column())) {
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158 qDebug() << "No more rows.";
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159 return;
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160 }
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161 row = old.row() + 1;
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162 col = old.column();
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163 }
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164 QModelIndex newIdx = mSortModel->index(row, col);
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165 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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166 }
28
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167
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168 void MetaDataView::applyDefaultSort() {
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169 QSettings settings;
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170 QString sortField = settings.value(SORT_COLUMN_KEY, SORT_COLUMN_DEFAULT).toString();
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171 bool sortAsc = settings.value(SORT_ORDER_KEY, SORT_ORDER_VALUE).toBool();
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172
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173 int idx = -1;
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174 for (int i=0; i < mSortModel->columnCount(); i++) {
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175 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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176 if (entry.toLower() == sortField.toLower()) {
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177 idx = 1;
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178 break;
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179 }
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180 }
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181 if (idx == -1) {
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182 qDebug() << "Failed to find configured sort column: " << sortField;
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183 return;
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184 }
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185 qDebug() << "Applying default sort order on column " << idx;
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186 mView->sortByColumn(idx, sortAsc ? Qt::AscendingOrder : Qt::DescendingOrder);
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187 }
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188
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