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annotate src/metadataview.cpp @ 40:89997d853bf6

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author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 06 May 2015 18:10:14 +0200
parents 0c05958d254c
children 73e6b6b12412
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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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 #include <QFontMetrics>
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24 #include <QApplication>
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26 MetaDataView::MetaDataView(QWidget *parent, Qt::WindowFlags f) :
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27 QWidget(parent, f) {
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28 /* Create models */
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29 mSortModel = new QSortFilterProxyModel;
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30 mCSVModel = new QxtCsvModel;
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31 setupGUI();
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32
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33 connect(mView->selectionModel(), &QItemSelectionModel::selectionChanged,
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34 this, &MetaDataView::viewSelectionChanged);
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35 connect(mSortModel, &QSortFilterProxyModel::dataChanged,
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36 this, &MetaDataView::dataChanged);
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37 return;
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38 }
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39
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40 void MetaDataView::setupGUI() {
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41 QVBoxLayout *baseLayout = new QVBoxLayout;
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43 FilterWidget *filterWidget = new FilterWidget(mSortModel);
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44 connect(filterWidget, &FilterWidget::filterHasChanged,
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45 this, &MetaDataView::applyDefaultSort);
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46 baseLayout->addWidget(filterWidget);
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47
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48 mView = new QTableView;
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49 mView->setModel(mSortModel);
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50
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51 mView->horizontalHeader()->setStretchLastSection(true);
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52 // mView->setColumnWidth(0, 60);
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53 mView->setSelectionBehavior(QAbstractItemView::SelectRows);
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54 mView->setSelectionMode(QAbstractItemView::SingleSelection);
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55 mView->setSortingEnabled(true);
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56 mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
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57
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58 baseLayout->addWidget(mView);
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59 mView->verticalHeader()->setVisible(false);
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60
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61 setLayout(baseLayout);
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62 }
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63
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64 QString MetaDataView::parseMetaData(const QString& filePath) {
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65 mCSVModel->setSource(filePath, true, ';', QTextCodec::codecForName("UTF8"));
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66 if (!mCSVModel->rowCount()) {
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67 return tr("Failed to parse file: '%1'").arg(filePath);
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68 }
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69
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70 mSortModel->setSourceModel(mCSVModel);
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71 qDebug() << "Parsed: " << mCSVModel->rowCount() << " rows.";
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72 applyDefaultSort();
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73 resizeColsToHeaders();
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74 return QString();
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75 }
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76
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77 void MetaDataView::dataChanged()
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78 {
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79 QItemSelectionModel *selection = mView->selectionModel();
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80 QModelIndexList selected = selection->selectedIndexes();
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81
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82 qDebug() << "Data Changed.";
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83 if (selected.isEmpty()) {
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84 /* Nothing selected still we need to emit this signal to update
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85 * the viewer otherwise selection changed handles it. */
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86 emit selectionChanged(QString(), 0, mSortModel->rowCount() - 1,
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87 QDateTime(), 0);
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88 }
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89 }
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90
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91 void MetaDataView::viewSelectionChanged(const QItemSelection& selected,
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92 const QItemSelection& deselected) {
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93 if (selected.indexes().isEmpty()) {
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94 /* Nothing selected */
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95 return;
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96 }
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97 /* One row selected */
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98 Q_ASSERT(selected.indexes().count() == mCSVModel->columnCount());
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99 const QModelIndex idx = selected.indexes()[FILENAME_COLUMN];
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100 const QString dateString = selected.indexes()[DATE_COLUMN].data().toString();
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101 bool ok;
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102 qint64 secondsSinceEpoch = dateString.toLongLong(&ok);
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103 if (!ok) {
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104 // TODO emit error
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105 qDebug() << "Unparsable date.";
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106 }
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107 QDateTime timestamp = QDateTime::fromMSecsSinceEpoch(secondsSinceEpoch * 1000);
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108 emit selectionChanged(idx.data().toString(), idx.row(), mSortModel->rowCount() - 1,
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109 timestamp, selected.indexes()[0].data().toInt());
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110 qDebug() << "Selection changed: " << idx.data();
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111 }
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112
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113 void MetaDataView::selectRow(int row) {
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114 QItemSelectionModel *selection = mView->selectionModel();
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115 if (!mSortModel->hasIndex(row, 0)) {
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116 qDebug() << "Invalid row: " << row;
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117 return;
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118 }
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119 QModelIndex newIdx = mSortModel->index(row, 0);
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120 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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121 }
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122
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123 void MetaDataView::selectPrevRow() {
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124 QItemSelectionModel *selection = mView->selectionModel();
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125 QModelIndexList selected = selection->selectedIndexes();
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126 int row = 0,
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127 col = 0;
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128 if (selected.isEmpty()) {
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129 qDebug() << "Selection empty. Start at row 0";
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130 if (!mSortModel->hasIndex(row, col)) {
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131 qDebug() << "Empty model. Failed to advance.";
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132 return;
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133 }
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134 } else {
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135 QModelIndex old = selection->selectedIndexes().first();
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136 if (!mSortModel->hasIndex(old.row() - 1, old.column())) {
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137 qDebug() << "No less rows.";
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138 return;
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139 }
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140 row = old.row() - 1;
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141 col = old.column();
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142 }
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143 QModelIndex newIdx = mSortModel->index(row, col);
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144 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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145 }
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146
2
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147 void MetaDataView::selectNextRow() {
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148 QItemSelectionModel *selection = mView->selectionModel();
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149 QModelIndexList selected = selection->selectedIndexes();
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150 int row = 0,
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151 col = 0;
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152 if (selected.isEmpty()) {
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153 qDebug() << "Selection empty. Start at row 0";
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154 if (!mSortModel->hasIndex(row, col)) {
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155 qDebug() << "Empty model. Failed to advance.";
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156 return;
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157 }
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158 } else {
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159 QModelIndex old = selection->selectedIndexes().first();
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160 if (!mSortModel->hasIndex(old.row() + 1, old.column())) {
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161 qDebug() << "No more rows.";
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162 return;
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163 }
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164 row = old.row() + 1;
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165 col = old.column();
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166 }
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167 QModelIndex newIdx = mSortModel->index(row, col);
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168 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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169 }
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170
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171 void MetaDataView::applyDefaultSort() {
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172 QSettings settings;
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173 QString sortField = settings.value(SORT_COLUMN_KEY, SORT_COLUMN_DEFAULT).toString();
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174 bool sortAsc = settings.value(SORT_ORDER_KEY, SORT_ORDER_VALUE).toBool();
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175
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176 int idx = -1;
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177 for (int i=0; i < mSortModel->columnCount(); i++) {
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178 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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179 qDebug() << "Looking at entry: " << entry;
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180 if (entry.toLower() == sortField.toLower()) {
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181 idx = i;
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182 break;
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183 }
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184 }
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185 if (idx == -1) {
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186 return;
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187 }
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188 qDebug() << "Applying default sort order on column " << idx;
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189 mView->sortByColumn(idx, sortAsc ? Qt::AscendingOrder : Qt::DescendingOrder);
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190 }
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191
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192 void MetaDataView::resizeColsToHeaders() {
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193 QFontMetrics fm(qApp->font());
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194 /* We do this manually here to avoid resizing to the real contents as
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195 * we want the columns in the width of the header data. And we only
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196 * want to increase that size. */
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197 for (int i=0; i < mSortModel->columnCount(); i++) {
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198 const QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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199 int w = fm.width(entry) + 20;
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200 if (w > mView->horizontalHeader()->sectionSize(i)) {
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201 mView->horizontalHeader()->resizeSection(i, w);
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202 qDebug() << "Resizing " << i << " to: " << w;
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203 }
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204 }
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205 }
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