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annotate src/metadataview.cpp @ 19:45553ac1eef8

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author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 14 Apr 2015 18:56:31 +0200
parents 73efe717b944
children 0a08c1c2531a
rev   line source
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1 #include "metadataview.h"
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2 #include "qxtcsvmodel.h"
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3 #include "filterwidget.h"
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4
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5 #include <QTextCodec>
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6 #include <QTableView>
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7 #include <QSortFilterProxyModel>
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8 #include <QVBoxLayout>
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9 #include <QLabel>
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10 #include <QDebug>
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11 #include <QModelIndex>
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12 #include <QItemSelectionModel>
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13
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14 MetaDataView::MetaDataView(QWidget *parent, Qt::WindowFlags f) :
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15 QWidget(parent, f) {
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16 /* Create models */
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17 mSortModel = new QSortFilterProxyModel;
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18 mCSVModel = new QxtCsvModel;
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19 setupGUI();
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20
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21 connect(mView->selectionModel(), &QItemSelectionModel::selectionChanged,
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22 this, &MetaDataView::viewSelectionChanged);
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23 connect(mSortModel, &QSortFilterProxyModel::dataChanged,
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24 this, &MetaDataView::dataChanged);
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25 return;
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26 }
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27
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28 void MetaDataView::setupGUI() {
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29 QVBoxLayout *baseLayout = new QVBoxLayout;
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31 FilterWidget *filterWidget = new FilterWidget(mSortModel);
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32 baseLayout->addWidget(filterWidget);
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33
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34 mView = new QTableView;
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35 mView->setModel(mSortModel);
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36
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37 mView->horizontalHeader()->setStretchLastSection(true);
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38 mView->resizeColumnsToContents();
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39 // mView->setColumnWidth(0, 60);
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40 mView->setSelectionBehavior(QAbstractItemView::SelectRows);
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41 mView->setSelectionMode(QAbstractItemView::SingleSelection);
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42 mView->setSortingEnabled(true);
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43 mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
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44
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45 baseLayout->addWidget(mView);
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46
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47 setLayout(baseLayout);
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48 }
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49
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50 QString MetaDataView::parseMetaData(const QString& filePath) {
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51 mCSVModel->setSource(filePath, true, ';', QTextCodec::codecForName("UTF8"));
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52 if (!mCSVModel->rowCount()) {
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53 return tr("Failed to parse file: '%1'").arg(filePath);
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54 }
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55
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56 mSortModel->setSourceModel(mCSVModel);
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57 qDebug() << "Parsed: " << mCSVModel->rowCount() << " rows.";
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58 return QString();
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59 }
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60
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61 void MetaDataView::dataChanged()
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62 {
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63 QItemSelectionModel *selection = mView->selectionModel();
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64 QModelIndexList selected = selection->selectedIndexes();
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65
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66 qDebug() << "Data Changed.";
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67 if (selected.isEmpty()) {
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68 /* Nothing selected still we need to emit this signal to update
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69 * the viewer otherwise selection changed handles it. */
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70 emit selectionChanged(QString(), 0, mSortModel->rowCount() - 1,
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71 QDateTime());
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72 }
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73 }
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74
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75 void MetaDataView::viewSelectionChanged(const QItemSelection& selected,
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76 const QItemSelection& deselected) {
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77 if (selected.indexes().isEmpty()) {
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78 /* Nothing selected */
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79 return;
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80 }
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81 /* One row selected */
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82 Q_ASSERT(selected.indexes().count() == mCSVModel->columnCount());
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83 const QModelIndex idx = selected.indexes()[0];
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84 const QString dateString = selected.indexes()[1].data().toString();
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85 bool ok;
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86 qint64 secondsSinceEpoch = dateString.toLongLong(&ok);
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87 if (!ok) {
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88 // TODO emit error
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89 qDebug() << "Unparsable date.";
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90 }
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91 QDateTime timestamp = QDateTime::fromMSecsSinceEpoch(secondsSinceEpoch * 1000);
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92 emit selectionChanged(idx.data().toString(), idx.row(), mSortModel->rowCount() - 1,
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93 timestamp);
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94 qDebug() << "Selection changed: " << idx.data();
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95 }
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96
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97 void MetaDataView::selectRow(int row) {
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98 QItemSelectionModel *selection = mView->selectionModel();
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99 if (!mSortModel->hasIndex(row, 0)) {
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100 qDebug() << "Invalid row: " << row;
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101 return;
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102 }
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103 QModelIndex newIdx = mSortModel->index(row, 0);
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104 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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105 }
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106
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107 void MetaDataView::selectPrevRow() {
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108 QItemSelectionModel *selection = mView->selectionModel();
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109 QModelIndexList selected = selection->selectedIndexes();
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110 int row = 0,
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111 col = 0;
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112 if (selected.isEmpty()) {
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113 qDebug() << "Selection empty. Start at row 0";
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114 if (!mSortModel->hasIndex(row, col)) {
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115 qDebug() << "Empty model. Failed to advance.";
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116 return;
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117 }
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118 } else {
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119 QModelIndex old = selection->selectedIndexes().first();
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120 if (!mSortModel->hasIndex(old.row() - 1, old.column())) {
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121 qDebug() << "No less rows.";
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122 return;
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123 }
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124 row = old.row() - 1;
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125 col = old.column();
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126 }
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127 QModelIndex newIdx = mSortModel->index(row, col);
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128 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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129 }
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130
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131 void MetaDataView::selectNextRow() {
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132 QItemSelectionModel *selection = mView->selectionModel();
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133 QModelIndexList selected = selection->selectedIndexes();
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134 int row = 0,
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135 col = 0;
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136 if (selected.isEmpty()) {
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137 qDebug() << "Selection empty. Start at row 0";
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138 if (!mSortModel->hasIndex(row, col)) {
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139 qDebug() << "Empty model. Failed to advance.";
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140 return;
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141 }
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142 } else {
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143 QModelIndex old = selection->selectedIndexes().first();
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144 if (!mSortModel->hasIndex(old.row() + 1, old.column())) {
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145 qDebug() << "No more rows.";
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146 return;
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147 }
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148 row = old.row() + 1;
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149 col = old.column();
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150 }
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151 QModelIndex newIdx = mSortModel->index(row, col);
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152 selection->select(newIdx, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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153 }
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