qt5base-lts/examples/tools/completer/mainwindow.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtWidgets>
#include "fsmodel.h"
#include "mainwindow.h"
//! [0]
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent), completer(0), lineEdit(0)
{
createMenu();
QWidget *centralWidget = new QWidget;
QLabel *modelLabel = new QLabel;
modelLabel->setText(tr("Model"));
modelCombo = new QComboBox;
modelCombo->addItem(tr("QFileSytemModel"));
modelCombo->addItem(tr("QFileSytemModel that shows full path"));
modelCombo->addItem(tr("Country list"));
modelCombo->addItem(tr("Word list"));
modelCombo->setCurrentIndex(0);
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 *maxVisibleLabel = new QLabel;
maxVisibleLabel->setText(tr("Max Visible Items"));
maxVisibleSpinBox = new QSpinBox;
maxVisibleSpinBox->setRange(3,25);
maxVisibleSpinBox->setValue(10);
wrapCheckBox = new QCheckBox;
wrapCheckBox->setText(tr("Wrap around completions"));
wrapCheckBox->setChecked(true);
//! [1]
//! [2]
contentsLabel = new QLabel;
contentsLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
connect(modelCombo, SIGNAL(activated(int)), this, SLOT(changeModel()));
connect(modeCombo, SIGNAL(activated(int)), this, SLOT(changeMode(int)));
connect(caseCombo, SIGNAL(activated(int)), this, SLOT(changeCase(int)));
connect(maxVisibleSpinBox, SIGNAL(valueChanged(int)), this, SLOT(changeMaxVisible(int)));
//! [2]
//! [3]
lineEdit = new QLineEdit;
QGridLayout *layout = new QGridLayout;
layout->addWidget(modelLabel, 0, 0); layout->addWidget(modelCombo, 0, 1);
layout->addWidget(modeLabel, 1, 0); layout->addWidget(modeCombo, 1, 1);
layout->addWidget(caseLabel, 2, 0); layout->addWidget(caseCombo, 2, 1);
layout->addWidget(maxVisibleLabel, 3, 0); layout->addWidget(maxVisibleSpinBox, 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);
changeModel();
setWindowTitle(tr("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]
QAbstractItemModel *MainWindow::modelFromFile(const QString& fileName)
{
QFile file(fileName);
if (!file.open(QFile::ReadOnly))
return new QStringListModel(completer);
//! [5]
//! [6]
#ifndef QT_NO_CURSOR
QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
#endif
QStringList words;
while (!file.atEnd()) {
QByteArray line = file.readLine();
if (!line.isEmpty())
words << line.trimmed();
}
#ifndef QT_NO_CURSOR
QApplication::restoreOverrideCursor();
#endif
//! [6]
//! [7]
if (!fileName.contains(QLatin1String("countries.txt")))
return new QStringListModel(words, completer);
//! [7]
// The last two chars of the countries.txt file indicate the country
// symbol. We put that in column 2 of a standard item model
//! [8]
QStandardItemModel *m = new QStandardItemModel(words.count(), 2, completer);
//! [8] //! [9]
for (int i = 0; i < words.count(); ++i) {
QModelIndex countryIdx = m->index(i, 0);
QModelIndex symbolIdx = m->index(i, 1);
QString country = words[i].mid(0, words[i].length() - 2).trimmed();
QString symbol = words[i].right(2);
m->setData(countryIdx, country);
m->setData(symbolIdx, symbol);
}
return m;
}
//! [9]
//! [10]
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);
}
//! [10]
void MainWindow::changeCase(int cs)
{
completer->setCaseSensitivity(cs ? Qt::CaseSensitive : Qt::CaseInsensitive);
}
//! [11]
void MainWindow::changeModel()
{
delete completer;
completer = new QCompleter(this);
completer->setMaxVisibleItems(maxVisibleSpinBox->value());
switch (modelCombo->currentIndex()) {
default:
case 0:
{ // Unsorted QFileSystemModel
QFileSystemModel *fsModel = new QFileSystemModel(completer);
fsModel->setRootPath("");
completer->setModel(fsModel);
contentsLabel->setText(tr("Enter file path"));
}
break;
//! [11] //! [12]
case 1:
{ // FileSystemModel that shows full paths
FileSystemModel *fsModel = new FileSystemModel(completer);
completer->setModel(fsModel);
fsModel->setRootPath("");
contentsLabel->setText(tr("Enter file path"));
}
break;
//! [12] //! [13]
case 2:
{ // Country List
completer->setModel(modelFromFile(":/resources/countries.txt"));
QTreeView *treeView = new QTreeView;
completer->setPopup(treeView);
treeView->setRootIsDecorated(false);
treeView->header()->hide();
treeView->header()->setStretchLastSection(false);
treeView->header()->setResizeMode(0, QHeaderView::Stretch);
treeView->header()->setResizeMode(1, QHeaderView::ResizeToContents);
contentsLabel->setText(tr("Enter name of your country"));
}
break;
//! [13] //! [14]
case 3:
{ // Word list
completer->setModel(modelFromFile(":/resources/wordlist.txt"));
completer->setModelSorting(QCompleter::CaseInsensitivelySortedModel);
contentsLabel->setText(tr("Enter a word"));
}
break;
}
changeMode(modeCombo->currentIndex());
changeCase(caseCombo->currentIndex());
completer->setWrapAround(wrapCheckBox->isChecked());
lineEdit->setCompleter(completer);
connect(wrapCheckBox, SIGNAL(clicked(bool)), completer, SLOT(setWrapAround(bool)));
}
//! [14]
//! [15]
void MainWindow::changeMaxVisible(int max)
{
completer->setMaxVisibleItems(max);
}
//! [15]
//! [16]
void MainWindow::about()
{
QMessageBox::about(this, tr("About"), tr("This example demonstrates the "
"different features of the QCompleter class."));
}
//! [16]