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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "treemodelcompleter.h"
#include "mainwindow.h"
//! [0]
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent), completer(0), lineEdit(0)
{
createMenu();
completer = new TreeModelCompleter(this);
completer->setModel(modelFromFile(":/resources/treemodel.txt"));
completer->setSeparator(QLatin1String("."));
QObject::connect(completer, SIGNAL(highlighted(const QModelIndex&)),
this, SLOT(highlight(const QModelIndex&)));
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, SIGNAL(textChanged(const QString&)),
completer, SLOT(setSeparator(const QString&)));
QCheckBox *wrapCheckBox = new QCheckBox;
wrapCheckBox->setText(tr("Wrap around completions"));
wrapCheckBox->setChecked(completer->wrapAround());
connect(wrapCheckBox, SIGNAL(clicked(bool)), completer, SLOT(setWrapAround(bool)));
contentsLabel = new QLabel;
contentsLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
connect(separatorLineEdit, SIGNAL(textChanged(const QString&)),
this, SLOT(updateContentsLabel(const QString&)));
treeView = new QTreeView;
treeView->setModel(completer->model());
treeView->header()->hide();
treeView->expandAll();
//! [1]
//! [2]
connect(modeCombo, SIGNAL(activated(int)), this, SLOT(changeMode(int)));
connect(caseCombo, SIGNAL(activated(int)), this, SLOT(changeCase(int)));
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, SIGNAL(triggered()), qApp, SLOT(quit()));
connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(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
QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
#endif
QStringList words;
QStandardItemModel *model = new QStandardItemModel(completer);
QVector<QStandardItem *> parents(10);
parents[0] = model->invisibleRootItem();
while (!file.atEnd()) {
QString line = file.readLine();
QString trimmedLine = line.trimmed();
if (line.isEmpty() || trimmedLine.isEmpty())
continue;
QRegExp re("^\\s+");
int nonws = re.indexIn(line);
int level = 0;
if (nonws == -1) {
level = 0;
} else {
if (line.startsWith("\t")) {
level = re.cap(0).length();
} else {
level = re.cap(0).length()/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
QApplication::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(index);
}
//! [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(QString(tr("Type path from model above with items at each level separated by a '%1'")).arg(sep));
}
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