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50
51#include "mainwindow.h"
52#include "treemodel.h"
53
54#include <QFile>
55
56MainWindow::MainWindow(QWidget *parent)
57 : QMainWindow(parent)
58{
59 setupUi(this);
60
61 const QStringList headers({tr(s: "Title"), tr(s: "Description")});
62
63 QFile file(":/default.txt");
64 file.open(flags: QIODevice::ReadOnly);
65 TreeModel *model = new TreeModel(headers, file.readAll(), this);
66 file.close();
67
68 view->setModel(model);
69 for (int column = 0; column < model->columnCount(); ++column)
70 view->resizeColumnToContents(column);
71
72 connect(sender: exitAction, signal: &QAction::triggered, qApp, slot: &QCoreApplication::quit);
73
74 connect(sender: view->selectionModel(), signal: &QItemSelectionModel::selectionChanged,
75 receiver: this, slot: &MainWindow::updateActions);
76
77 connect(sender: actionsMenu, signal: &QMenu::aboutToShow, receiver: this, slot: &MainWindow::updateActions);
78 connect(sender: insertRowAction, signal: &QAction::triggered, receiver: this, slot: &MainWindow::insertRow);
79 connect(sender: insertColumnAction, signal: &QAction::triggered, receiver: this, slot: &MainWindow::insertColumn);
80 connect(sender: removeRowAction, signal: &QAction::triggered, receiver: this, slot: &MainWindow::removeRow);
81 connect(sender: removeColumnAction, signal: &QAction::triggered, receiver: this, slot: &MainWindow::removeColumn);
82 connect(sender: insertChildAction, signal: &QAction::triggered, receiver: this, slot: &MainWindow::insertChild);
83
84 updateActions();
85}
86
87void MainWindow::insertChild()
88{
89 const QModelIndex index = view->selectionModel()->currentIndex();
90 QAbstractItemModel *model = view->model();
91
92 if (model->columnCount(parent: index) == 0) {
93 if (!model->insertColumn(acolumn: 0, aparent: index))
94 return;
95 }
96
97 if (!model->insertRow(arow: 0, aparent: index))
98 return;
99
100 for (int column = 0; column < model->columnCount(parent: index); ++column) {
101 const QModelIndex child = model->index(row: 0, column, parent: index);
102 model->setData(index: child, value: QVariant(tr(s: "[No data]")), role: Qt::EditRole);
103 if (!model->headerData(section: column, orientation: Qt::Horizontal).isValid())
104 model->setHeaderData(section: column, orientation: Qt::Horizontal, value: QVariant(tr(s: "[No header]")), role: Qt::EditRole);
105 }
106
107 view->selectionModel()->setCurrentIndex(index: model->index(row: 0, column: 0, parent: index),
108 command: QItemSelectionModel::ClearAndSelect);
109 updateActions();
110}
111
112bool MainWindow::insertColumn()
113{
114 QAbstractItemModel *model = view->model();
115 int column = view->selectionModel()->currentIndex().column();
116
117 // Insert a column in the parent item.
118 bool changed = model->insertColumn(acolumn: column + 1);
119 if (changed)
120 model->setHeaderData(section: column + 1, orientation: Qt::Horizontal, value: QVariant("[No header]"), role: Qt::EditRole);
121
122 updateActions();
123
124 return changed;
125}
126
127void MainWindow::insertRow()
128{
129 const QModelIndex index = view->selectionModel()->currentIndex();
130 QAbstractItemModel *model = view->model();
131
132 if (!model->insertRow(arow: index.row()+1, aparent: index.parent()))
133 return;
134
135 updateActions();
136
137 for (int column = 0; column < model->columnCount(parent: index.parent()); ++column) {
138 const QModelIndex child = model->index(row: index.row() + 1, column, parent: index.parent());
139 model->setData(index: child, value: QVariant(tr(s: "[No data]")), role: Qt::EditRole);
140 }
141}
142
143bool MainWindow::removeColumn()
144{
145 QAbstractItemModel *model = view->model();
146 const int column = view->selectionModel()->currentIndex().column();
147
148 // Insert columns in each child of the parent item.
149 const bool changed = model->removeColumn(acolumn: column);
150 if (changed)
151 updateActions();
152
153 return changed;
154}
155
156void MainWindow::removeRow()
157{
158 const QModelIndex index = view->selectionModel()->currentIndex();
159 QAbstractItemModel *model = view->model();
160 if (model->removeRow(arow: index.row(), aparent: index.parent()))
161 updateActions();
162}
163
164void MainWindow::updateActions()
165{
166 const bool hasSelection = !view->selectionModel()->selection().isEmpty();
167 removeRowAction->setEnabled(hasSelection);
168 removeColumnAction->setEnabled(hasSelection);
169
170 const bool hasCurrent = view->selectionModel()->currentIndex().isValid();
171 insertRowAction->setEnabled(hasCurrent);
172 insertColumnAction->setEnabled(hasCurrent);
173
174 if (hasCurrent) {
175 view->closePersistentEditor(index: view->selectionModel()->currentIndex());
176
177 const int row = view->selectionModel()->currentIndex().row();
178 const int column = view->selectionModel()->currentIndex().column();
179 if (view->selectionModel()->currentIndex().parent().isValid())
180 statusBar()->showMessage(text: tr(s: "Position: (%1,%2)").arg(a: row).arg(a: column));
181 else
182 statusBar()->showMessage(text: tr(s: "Position: (%1,%2) in top level").arg(a: row).arg(a: column));
183 }
184}
185

source code of qtbase/examples/widgets/itemviews/editabletreemodel/mainwindow.cpp