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annotate src/metadataview.cpp @ 88:3916cb3c9105

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Add new FilterSort model that allows to include empty values
author Andre Heinecke <andre.heinecke@intevation.de>
date Fri, 19 Jun 2015 14:26:16 +0200
parents 9a03703622b8
children b8c7644a9d49
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 "includeemptysortmodel.h"
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12 #include "constants.h"
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13
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14 #include <QTextCodec>
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15 #include <QTableView>
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16 #include <QSortFilterProxyModel>
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17 #include <QVBoxLayout>
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18 #include <QLabel>
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19 #include <QDebug>
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20 #include <QModelIndex>
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21 #include <QHeaderView>
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22 #include <QItemSelectionModel>
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23 #include <QSettings>
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24 #include <QFontMetrics>
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25 #include <QApplication>
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26
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27 /**@brief Small wrapper around csv model to enable numerical sorting. */
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28 class numericSortCSVModel : public QxtCsvModel
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29 {
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30 public:
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31 /**@brief returns the data as string, integer or double variant. */
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32 QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const {
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33 QVariant base = QxtCsvModel::data(index, role);
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34 bool ok = false;
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35 int intVal = base.toInt(&ok);
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36 if (ok) {
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37 return intVal;
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38 }
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39 double dblVal = base.toDouble(&ok);
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40 if (ok) {
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41 return dblVal;
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42 }
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43 return base;
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44 }
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45 };
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46
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47 MetaDataView::MetaDataView(QWidget *parent, Qt::WindowFlags f) :
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48 QWidget(parent, f),
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49 mDateColIdx(-1) {
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50 /* Create models */
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51 mSortModel = new IncludeEmptySortModel;
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52 mCSVModel = new numericSortCSVModel;
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53 setupGUI();
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54
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55 connect(mView->selectionModel(), &QItemSelectionModel::selectionChanged,
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56 this, &MetaDataView::viewSelectionChanged);
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57 connect(mSortModel, &QSortFilterProxyModel::dataChanged,
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58 this, &MetaDataView::dataChanged);
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59 return;
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60 }
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61
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62 void MetaDataView::setupGUI() {
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63 QVBoxLayout *baseLayout = new QVBoxLayout;
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64
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65 mFilterWidget = new FilterWidget(mSortModel, true);
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66 connect(mFilterWidget, &FilterWidget::filterHasChanged,
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67 this, &MetaDataView::applyDefaultSort);
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68 connect(mFilterWidget, &FilterWidget::includeEmptyChanged,
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69 mSortModel, &IncludeEmptySortModel::setIncludeEmpty);
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70 connect(mFilterWidget, &FilterWidget::filterHasChanged,
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71 this, &MetaDataView::selectFirstRow);
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72 baseLayout->addWidget(mFilterWidget);
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73
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74 mView = new QTableView;
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75 mView->setModel(mSortModel);
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76
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77 mView->horizontalHeader()->setStretchLastSection(true);
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78 // mView->setColumnWidth(0, 60);
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79 mView->setSelectionBehavior(QAbstractItemView::SelectRows);
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80 mView->setSelectionMode(QAbstractItemView::SingleSelection);
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81 mView->setSortingEnabled(true);
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82 mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
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83
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84 baseLayout->addWidget(mView);
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85 mView->verticalHeader()->setVisible(false);
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86
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87 setLayout(baseLayout);
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88 }
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89
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90 QString MetaDataView::parseMetaData(const QString& filePath) {
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91 mCSVModel->setSource(filePath, true, ';', QTextCodec::codecForName("UTF8"));
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92 if (!mCSVModel->rowCount()) {
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93 return tr("Failed to parse file: '%1'").arg(filePath);
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94 }
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95
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96 mSortModel->setSourceModel(mCSVModel);
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97 qDebug() << "Parsed: " << mCSVModel->rowCount() << " rows.";
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98 applyDefaultSort();
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99 resizeColsToHeaders();
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100
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101 QSettings settings;
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102 const QString displayDate = settings.value(DATE_COLUMN_KEY, DATE_COLUMN_DEFAULT).toString();
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103 settings.setValue(DATE_COLUMN_KEY, displayDate);
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104 for (int i=0; i < mSortModel->columnCount(); i++) {
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105 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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106 if (entry.toLower() == displayDate.toLower()) {
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107 mDateColIdx = i;
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108 break;
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109 }
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110 }
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111 if (mDateColIdx == -1) {
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112 qDebug() << "Failed to find displayDate column: " << displayDate;
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113 mDateColIdx = DATE_COLUMN_FALLBACK_IDX;
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114 }
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115 setupHeaderTooltips();
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116 return QString();
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117 }
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118
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119 void MetaDataView::dataChanged()
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120 {
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121 QItemSelectionModel *selection = mView->selectionModel();
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122 QModelIndexList selected = selection->selectedIndexes();
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123
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124 qDebug() << "Data Changed.";
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125 if (selected.isEmpty()) {
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126 /* Nothing selected still we need to emit this signal to update
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127 * the viewer otherwise selection changed handles it. */
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128 emit selectionChanged(QString(), 0, mSortModel->rowCount() - 1,
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129 QString(), 0);
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130 }
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131 }
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132
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133 void MetaDataView::viewSelectionChanged(const QItemSelection& selected,
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134 const QItemSelection& deselected) {
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135 if (selected.indexes().isEmpty()) {
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136 /* Nothing selected */
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137 return;
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138 }
2
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139 /* One row selected */
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140 Q_ASSERT(selected.indexes().count() == mCSVModel->columnCount());
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141 const QModelIndex idx = selected.indexes()[FILENAME_COLUMN_IDX];
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142 const QString dateString = selected.indexes()[mDateColIdx].data().toString();
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143 bool ok;
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144 qint64 secondsSinceEpoch = dateString.toLongLong(&ok);
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145 QString timestamp = dateString;
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146 if (ok) {
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147 QDateTime datetime = QDateTime::fromMSecsSinceEpoch(secondsSinceEpoch * 1000);
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148 if (datetime.isValid()) {
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149 timestamp = datetime.toString(LONG_DATE_FORMAT);
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150 }
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151 }
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152 emit selectionChanged(idx.data().toString(), idx.row(), mSortModel->rowCount() - 1,
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153 timestamp, selected.indexes()[0].data().toInt());
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154 qDebug() << "Selection changed: " << idx.data();
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155 if (!isVisible()) {
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156 mView->scrollTo(selected.indexes()[0], QAbstractItemView::PositionAtTop);
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157 }
2
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158 }
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159
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160 void MetaDataView::selectFirstRow() {
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161 qDebug() << "Selecting first row";
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162 selectRow(0);
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163 }
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164
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165 void MetaDataView::selectRow(int row) {
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166 QItemSelectionModel *selection = mView->selectionModel();
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167 if (!mSortModel->hasIndex(row, 0)) {
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168 qDebug() << "Invalid row: " << row;
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169 return;
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170 }
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171 QModelIndex newIdx = mSortModel->index(row, 0);
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172 selection->select(newIdx, QItemSelectionModel::Clear | QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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173 }
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174
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175 void MetaDataView::selectPrevRow() {
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176 QItemSelectionModel *selection = mView->selectionModel();
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177 QModelIndexList selected = selection->selectedIndexes();
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178 int row = 0,
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179 col = 0;
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180 if (selected.isEmpty()) {
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181 qDebug() << "Selection empty. Start at row 0";
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182 if (!mSortModel->hasIndex(row, col)) {
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183 qDebug() << "Empty model. Failed to advance.";
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184 return;
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185 }
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186 } else {
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187 QModelIndex old = selection->selectedIndexes().first();
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188 if (!mSortModel->hasIndex(old.row() - 1, old.column())) {
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189 qDebug() << "No less rows.";
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190 return;
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191 }
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192 row = old.row() - 1;
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193 col = old.column();
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194 }
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195 QModelIndex newIdx = mSortModel->index(row, col);
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196 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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197 }
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198
2
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199 void MetaDataView::selectNextRow() {
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200 QItemSelectionModel *selection = mView->selectionModel();
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201 QModelIndexList selected = selection->selectedIndexes();
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202 int row = 0,
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203 col = 0;
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204 if (selected.isEmpty()) {
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205 qDebug() << "Selection empty. Start at row 0";
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206 if (!mSortModel->hasIndex(row, col)) {
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207 qDebug() << "Empty model. Failed to advance.";
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208 return;
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209 }
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210 } else {
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211 QModelIndex old = selection->selectedIndexes().first();
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212 if (!mSortModel->hasIndex(old.row() + 1, old.column())) {
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213 qDebug() << "No more rows.";
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214 return;
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215 }
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216 row = old.row() + 1;
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217 col = old.column();
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218 }
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219 QModelIndex newIdx = mSortModel->index(row, col);
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220 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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221 }
28
4e16fbd10945 (issue3-5) Make the default sort order configurable
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222
4e16fbd10945 (issue3-5) Make the default sort order configurable
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223 void MetaDataView::applyDefaultSort() {
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224 QSettings settings;
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225 QString sortField = settings.value(SORT_COLUMN_KEY, SORT_COLUMN_DEFAULT).toString();
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226 settings.setValue(SORT_COLUMN_KEY, sortField);
28
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227 bool sortAsc = settings.value(SORT_ORDER_KEY, SORT_ORDER_VALUE).toBool();
55
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228 settings.setValue(SORT_ORDER_KEY, sortAsc);
28
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229
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230 int idx = -1;
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231 for (int i=0; i < mSortModel->columnCount(); i++) {
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232 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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233 if (entry.toLower() == sortField.toLower()) {
37
0c05958d254c (issue 13, 6) Add constant index number column to data and view
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234 idx = i;
28
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235 break;
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236 }
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237 }
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238 if (idx == -1) {
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239 return;
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240 }
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241 qDebug() << "Applying default sort order on column " << idx;
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242 mView->sortByColumn(idx, sortAsc ? Qt::AscendingOrder : Qt::DescendingOrder);
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243 }
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diff changeset
244
35
f10d4e035eec (issue10) Use width of header as minimum of the column size
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245 void MetaDataView::resizeColsToHeaders() {
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246 QFontMetrics fm(qApp->font());
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247 /* We do this manually here to avoid resizing to the real contents as
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diff changeset
248 * we want the columns in the width of the header data. And we only
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249 * want to increase that size. */
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250 for (int i=0; i < mSortModel->columnCount(); i++) {
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diff changeset
251 const QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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252 int w = fm.width(entry) + 20;
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diff changeset
253 if (w > mView->horizontalHeader()->sectionSize(i)) {
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diff changeset
254 mView->horizontalHeader()->resizeSection(i, w);
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diff changeset
255 qDebug() << "Resizing " << i << " to: " << w;
f10d4e035eec (issue10) Use width of header as minimum of the column size
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256 }
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257 }
f10d4e035eec (issue10) Use width of header as minimum of the column size
Andre Heinecke <andre.heinecke@intevation.de>
parents: 28
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258 }
81
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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259
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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260 void MetaDataView::setupHeaderTooltips() {
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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261 QSettings settings;
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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262 settings.beginGroup(TOOLTIP_CONFIG_GROUP);
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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263 for (int i=0; i < mSortModel->columnCount(); i++) {
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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264 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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265 QString toolTip = settings.value(entry).toString();
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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266 settings.setValue(entry, toolTip);
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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267 if (!mSortModel->setHeaderData(i, Qt::Horizontal, toolTip, Qt::ToolTipRole)) {
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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268 qDebug() << "Failed to set header data";
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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269 }
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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270 }
5923d569167b Make Header tooltips configurable
Andre Heinecke <andre.heinecke@intevation.de>
parents: 56
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271 }
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