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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "mainwindow.h"
++ #include "treemodelcompleter.h"
++
++ #include <QAbstractProxyModel>
++ #include <QAction>
++ #include <QApplication>
++ #include <QCheckBox>
++ #include <QComboBox>
++ #include <QFile>
++ #include <QGridLayout>
++ #include <QHeaderView>
++ #include <QLabel>
++ #include <QLineEdit>
++ #include <QMenuBar>
++ #include <QMessageBox>
++ #include <QStandardItemModel>
++ #include <QStringListModel>
++ #include <QTreeView>
++
++ //! [0]
++ MainWindow::MainWindow(QWidget *parent)
++ : QMainWindow(parent)
++ {
++ createMenu();
++
++ completer = new TreeModelCompleter(this);
++ completer->setModel(modelFromFile(":/resources/treemodel.txt"));
++ completer->setSeparator(QLatin1String("."));
++ QObject::connect(completer, QOverload<const QModelIndex &>::of(&TreeModelCompleter::highlighted),
++ this, &MainWindow::highlight);
++
++ QWidget *centralWidget = new QWidget;
++
++ QLabel *modelLabel = new QLabel;
++ modelLabel->setText(tr("Tree Model<br>(Double click items to edit)"));
++
++ QLabel *modeLabel = new QLabel;
++ modeLabel->setText(tr("Completion Mode"));
++ modeCombo = new QComboBox;
++ modeCombo->addItem(tr("Inline"));
++ modeCombo->addItem(tr("Filtered Popup"));
++ modeCombo->addItem(tr("Unfiltered Popup"));
++ modeCombo->setCurrentIndex(1);
++
++ QLabel *caseLabel = new QLabel;
++ caseLabel->setText(tr("Case Sensitivity"));
++ caseCombo = new QComboBox;
++ caseCombo->addItem(tr("Case Insensitive"));
++ caseCombo->addItem(tr("Case Sensitive"));
++ caseCombo->setCurrentIndex(0);
++ //! [0]
++
++ //! [1]
++ QLabel *separatorLabel = new QLabel;
++ separatorLabel->setText(tr("Tree Separator"));
++
++ QLineEdit *separatorLineEdit = new QLineEdit;
++ separatorLineEdit->setText(completer->separator());
++ connect(separatorLineEdit, &QLineEdit::textChanged,
++ completer, &TreeModelCompleter::setSeparator);
++
++ QCheckBox *wrapCheckBox = new QCheckBox;
++ wrapCheckBox->setText(tr("Wrap around completions"));
++ wrapCheckBox->setChecked(completer->wrapAround());
++ connect(wrapCheckBox, &QAbstractButton::clicked, completer, &QCompleter::setWrapAround);
++
++ contentsLabel = new QLabel;
++ contentsLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
++ connect(separatorLineEdit, &QLineEdit::textChanged,
++ this, &MainWindow::updateContentsLabel);
++
++ treeView = new QTreeView;
++ treeView->setModel(completer->model());
++ treeView->header()->hide();
++ treeView->expandAll();
++ //! [1]
++
++ //! [2]
++ connect(modeCombo, &QComboBox::activated,
++ this, &MainWindow::changeMode);
++ connect(caseCombo, &QComboBox::activated,
++ this, &MainWindow::changeMode);
++
++ lineEdit = new QLineEdit;
++ lineEdit->setCompleter(completer);
++ //! [2]
++
++ //! [3]
++ QGridLayout *layout = new QGridLayout;
++ layout->addWidget(modelLabel, 0, 0); layout->addWidget(treeView, 0, 1);
++ layout->addWidget(modeLabel, 1, 0); layout->addWidget(modeCombo, 1, 1);
++ layout->addWidget(caseLabel, 2, 0); layout->addWidget(caseCombo, 2, 1);
++ layout->addWidget(separatorLabel, 3, 0); layout->addWidget(separatorLineEdit, 3, 1);
++ layout->addWidget(wrapCheckBox, 4, 0);
++ layout->addWidget(contentsLabel, 5, 0, 1, 2);
++ layout->addWidget(lineEdit, 6, 0, 1, 2);
++ centralWidget->setLayout(layout);
++ setCentralWidget(centralWidget);
++
++ changeCase(caseCombo->currentIndex());
++ changeMode(modeCombo->currentIndex());
++
++ setWindowTitle(tr("Tree Model Completer"));
++ lineEdit->setFocus();
++ }
++ //! [3]
++
++ //! [4]
++ void MainWindow::createMenu()
++ {
++ QAction *exitAction = new QAction(tr("Exit"), this);
++ QAction *aboutAct = new QAction(tr("About"), this);
++ QAction *aboutQtAct = new QAction(tr("About Qt"), this);
++
++ connect(exitAction, &QAction::triggered, qApp, &QApplication::quit);
++ connect(aboutAct, &QAction::triggered, this, &MainWindow::about);
++ connect(aboutQtAct, &QAction::triggered, qApp, &QApplication::aboutQt);
++
++ QMenu *fileMenu = menuBar()->addMenu(tr("File"));
++ fileMenu->addAction(exitAction);
++
++ QMenu *helpMenu = menuBar()->addMenu(tr("About"));
++ helpMenu->addAction(aboutAct);
++ helpMenu->addAction(aboutQtAct);
++ }
++ //! [4]
++
++ //! [5]
++ void MainWindow::changeMode(int index)
++ {
++ QCompleter::CompletionMode mode;
++ if (index == 0)
++ mode = QCompleter::InlineCompletion;
++ else if (index == 1)
++ mode = QCompleter::PopupCompletion;
++ else
++ mode = QCompleter::UnfilteredPopupCompletion;
++
++ completer->setCompletionMode(mode);
++ }
++ //! [5]
++
++ QAbstractItemModel *MainWindow::modelFromFile(const QString &fileName)
++ {
++ QFile file(fileName);
++ if (!file.open(QFile::ReadOnly))
++ return new QStringListModel(completer);
++
++ #ifndef QT_NO_CURSOR
++ QGuiApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
++ #endif
++
++ QStandardItemModel *model = new QStandardItemModel(completer);
++ QList<QStandardItem *> parents(10);
++ parents[0] = model->invisibleRootItem();
++
++ QRegularExpression re("^\\s+");
++ while (!file.atEnd()) {
++ const QString line = QString::fromUtf8(file.readLine());
++ const QString trimmedLine = line.trimmed();
++ if (trimmedLine.isEmpty())
++ continue;
++
++ const QRegularExpressionMatch match = re.match(line);
++ int nonws = match.capturedStart();
++ int level = 0;
++ if (nonws == -1) {
++ level = 0;
++ } else {
++ const int capLen = match.capturedLength();
++ level = capLen / 4;
++ }
++
++ if (level + 1 >= parents.size())
++ parents.resize(parents.size() * 2);
++
++ QStandardItem *item = new QStandardItem;
++ item->setText(trimmedLine);
++ parents[level]->appendRow(item);
++ parents[level + 1] = item;
++ }
++
++ #ifndef QT_NO_CURSOR
++ QGuiApplication::restoreOverrideCursor();
++ #endif
++
++ return model;
++ }
++
++ void MainWindow::highlight(const QModelIndex &index)
++ {
++ QAbstractItemModel *completionModel = completer->completionModel();
++ QAbstractProxyModel *proxy = qobject_cast<QAbstractProxyModel *>(completionModel);
++ if (!proxy)
++ return;
++ QModelIndex sourceIndex = proxy->mapToSource(index);
++ treeView->selectionModel()->select(sourceIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
++ treeView->scrollTo(sourceIndex);
++ }
++
++ //! [6]
++ void MainWindow::about()
++ {
++ QMessageBox::about(this, tr("About"), tr("This example demonstrates how "
++ "to use a QCompleter with a custom tree model."));
++ }
++ //! [6]
++
++ //! [7]
++ void MainWindow::changeCase(int cs)
++ {
++ completer->setCaseSensitivity(cs ? Qt::CaseSensitive : Qt::CaseInsensitive);
++ }
++ //! [7]
++
++ void MainWindow::updateContentsLabel(const QString &sep)
++ {
++ contentsLabel->setText(tr("Type path from model above with items at each level separated by a '%1'").arg(sep));
++ }