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annotate src/metadataview.cpp @ 53:28d5a77db9fb 0.9.1

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Ensure that the first row is properly set after filtering
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 18 May 2015 12:06:01 +0200
parents 73e6b6b12412
children 23672cbc3e5f
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 #include <QFontMetrics>
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24 #include <QApplication>
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25
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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 mDateColIdx(-1) {
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29 /* Create models */
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30 mSortModel = new QSortFilterProxyModel;
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31 mCSVModel = new QxtCsvModel;
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32 setupGUI();
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33
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34 connect(mView->selectionModel(), &QItemSelectionModel::selectionChanged,
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35 this, &MetaDataView::viewSelectionChanged);
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36 connect(mSortModel, &QSortFilterProxyModel::dataChanged,
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37 this, &MetaDataView::dataChanged);
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38 return;
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39 }
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40
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41 void MetaDataView::setupGUI() {
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42 QVBoxLayout *baseLayout = new QVBoxLayout;
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43
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44 FilterWidget *filterWidget = new FilterWidget(mSortModel);
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45 connect(filterWidget, &FilterWidget::filterHasChanged,
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46 this, &MetaDataView::applyDefaultSort);
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47 connect(filterWidget, &FilterWidget::filterHasChanged,
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48 this, &MetaDataView::selectFirstRow);
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49 baseLayout->addWidget(filterWidget);
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50
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51 mView = new QTableView;
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52 mView->setModel(mSortModel);
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53
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54 mView->horizontalHeader()->setStretchLastSection(true);
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55 // mView->setColumnWidth(0, 60);
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56 mView->setSelectionBehavior(QAbstractItemView::SelectRows);
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57 mView->setSelectionMode(QAbstractItemView::SingleSelection);
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58 mView->setSortingEnabled(true);
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59 mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
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60
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61 baseLayout->addWidget(mView);
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62 mView->verticalHeader()->setVisible(false);
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63
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64 setLayout(baseLayout);
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65 }
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66
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67 QString MetaDataView::parseMetaData(const QString& filePath) {
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68 mCSVModel->setSource(filePath, true, ';', QTextCodec::codecForName("UTF8"));
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69 if (!mCSVModel->rowCount()) {
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70 return tr("Failed to parse file: '%1'").arg(filePath);
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71 }
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72
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73 mSortModel->setSourceModel(mCSVModel);
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74 qDebug() << "Parsed: " << mCSVModel->rowCount() << " rows.";
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75 applyDefaultSort();
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76 resizeColsToHeaders();
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77
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78 QSettings settings;
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79 const QString displayDate = settings.value(DATE_COLUMN_KEY, DATE_COLUMN_DEFAULT).toString();
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80 settings.setValue(DATE_COLUMN_KEY, displayDate);
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81 for (int i=0; i < mSortModel->columnCount(); i++) {
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82 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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83 if (entry.toLower() == displayDate.toLower()) {
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84 mDateColIdx = i;
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85 break;
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86 }
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87 }
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88 if (mDateColIdx == -1) {
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89 qDebug() << "Failed to find displayDate column: " << displayDate;
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90 mDateColIdx = DATE_COLUMN_FALLBACK_IDX;
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91 }
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92 return QString();
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93 }
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94
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95 void MetaDataView::dataChanged()
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96 {
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97 QItemSelectionModel *selection = mView->selectionModel();
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98 QModelIndexList selected = selection->selectedIndexes();
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99
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100 qDebug() << "Data Changed.";
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101 if (selected.isEmpty()) {
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102 /* Nothing selected still we need to emit this signal to update
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103 * the viewer otherwise selection changed handles it. */
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104 emit selectionChanged(QString(), 0, mSortModel->rowCount() - 1,
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105 QString(), 0);
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106 }
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107 }
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108
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109 void MetaDataView::viewSelectionChanged(const QItemSelection& selected,
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110 const QItemSelection& deselected) {
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111 if (selected.indexes().isEmpty()) {
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112 /* Nothing selected */
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113 return;
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114 }
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115 /* One row selected */
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116 Q_ASSERT(selected.indexes().count() == mCSVModel->columnCount());
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117 const QModelIndex idx = selected.indexes()[FILENAME_COLUMN_IDX];
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118 const QString dateString = selected.indexes()[mDateColIdx].data().toString();
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119 bool ok;
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120 qint64 secondsSinceEpoch = dateString.toLongLong(&ok);
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121 QString timestamp = dateString;
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122 if (ok) {
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123 QDateTime datetime = QDateTime::fromMSecsSinceEpoch(secondsSinceEpoch * 1000);
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124 if (datetime.isValid()) {
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125 timestamp = datetime.toString(LONG_DATE_FORMAT);
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126 }
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127 }
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128 emit selectionChanged(idx.data().toString(), idx.row(), mSortModel->rowCount() - 1,
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129 timestamp, selected.indexes()[0].data().toInt());
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130 qDebug() << "Selection changed: " << idx.data();
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131 }
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132
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133 void MetaDataView::selectFirstRow() {
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134 qDebug() << "Selecting first row";
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135 selectRow(0);
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136 }
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137
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138 void MetaDataView::selectRow(int row) {
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139 QItemSelectionModel *selection = mView->selectionModel();
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140 if (!mSortModel->hasIndex(row, 0)) {
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141 qDebug() << "Invalid row: " << row;
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142 return;
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143 }
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144 QModelIndex newIdx = mSortModel->index(row, 0);
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145 selection->select(newIdx, QItemSelectionModel::Clear | QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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146 }
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147
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148 void MetaDataView::selectPrevRow() {
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149 QItemSelectionModel *selection = mView->selectionModel();
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150 QModelIndexList selected = selection->selectedIndexes();
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151 int row = 0,
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152 col = 0;
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153 if (selected.isEmpty()) {
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154 qDebug() << "Selection empty. Start at row 0";
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155 if (!mSortModel->hasIndex(row, col)) {
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156 qDebug() << "Empty model. Failed to advance.";
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157 return;
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158 }
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159 } else {
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160 QModelIndex old = selection->selectedIndexes().first();
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161 if (!mSortModel->hasIndex(old.row() - 1, old.column())) {
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162 qDebug() << "No less rows.";
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163 return;
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164 }
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165 row = old.row() - 1;
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166 col = old.column();
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167 }
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168 QModelIndex newIdx = mSortModel->index(row, col);
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169 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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170 }
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171
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172 void MetaDataView::selectNextRow() {
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173 QItemSelectionModel *selection = mView->selectionModel();
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174 QModelIndexList selected = selection->selectedIndexes();
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175 int row = 0,
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176 col = 0;
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177 if (selected.isEmpty()) {
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178 qDebug() << "Selection empty. Start at row 0";
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179 if (!mSortModel->hasIndex(row, col)) {
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180 qDebug() << "Empty model. Failed to advance.";
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181 return;
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182 }
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183 } else {
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184 QModelIndex old = selection->selectedIndexes().first();
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185 if (!mSortModel->hasIndex(old.row() + 1, old.column())) {
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186 qDebug() << "No more rows.";
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187 return;
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188 }
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189 row = old.row() + 1;
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190 col = old.column();
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191 }
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192 QModelIndex newIdx = mSortModel->index(row, col);
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193 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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194 }
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195
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196 void MetaDataView::applyDefaultSort() {
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197 QSettings settings;
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198 QString sortField = settings.value(SORT_COLUMN_KEY, SORT_COLUMN_DEFAULT).toString();
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199 bool sortAsc = settings.value(SORT_ORDER_KEY, SORT_ORDER_VALUE).toBool();
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200
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201 int idx = -1;
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202 for (int i=0; i < mSortModel->columnCount(); i++) {
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203 QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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204 if (entry.toLower() == sortField.toLower()) {
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205 idx = i;
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206 break;
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207 }
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208 }
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209 if (idx == -1) {
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210 return;
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211 }
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212 qDebug() << "Applying default sort order on column " << idx;
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213 mView->sortByColumn(idx, sortAsc ? Qt::AscendingOrder : Qt::DescendingOrder);
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214 }
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215
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216 void MetaDataView::resizeColsToHeaders() {
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217 QFontMetrics fm(qApp->font());
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218 /* We do this manually here to avoid resizing to the real contents as
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219 * we want the columns in the width of the header data. And we only
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220 * want to increase that size. */
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221 for (int i=0; i < mSortModel->columnCount(); i++) {
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222 const QString entry = mSortModel->headerData(i, Qt::Horizontal).toString();
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223 int w = fm.width(entry) + 20;
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224 if (w > mView->horizontalHeader()->sectionSize(i)) {
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225 mView->horizontalHeader()->resizeSection(i, w);
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226 qDebug() << "Resizing " << i << " to: " << w;
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227 }
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228 }
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229 }
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