mainwindow.cpp Example File
tools/completer/mainwindow.cpp
#include <QtGui>
#include "dirmodel.h"
#include "mainwindow.h"
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("QDirModel"));
modelCombo->addItem(tr("QDirModel 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);
wrapCheckBox = new QCheckBox;
wrapCheckBox->setText(tr("Wrap around completions"));
wrapCheckBox->setChecked(true);
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)));
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(wrapCheckBox, 3, 0);
layout->addWidget(contentsLabel, 4, 0, 1, 2);
layout->addWidget(lineEdit, 5, 0, 1, 2);
centralWidget->setLayout(layout);
setCentralWidget(centralWidget);
changeModel();
setWindowTitle(tr("Completer"));
lineEdit->setFocus();
}
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);
}
QAbstractItemModel *MainWindow::modelFromFile(const QString& fileName)
{
QFile file(fileName);
if (!file.open(QFile::ReadOnly))
return new QStringListModel(completer);
QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
QStringList words;
while (!file.atEnd()) {
QByteArray line = file.readLine();
if (!line.isEmpty())
words << line.trimmed();
}
QApplication::restoreOverrideCursor();
if (!fileName.contains(QLatin1String("countries.txt")))
return new QStringListModel(words, completer);
The last two chars of the countries.txt file indicate the country
symbol. We put that in column 2 of a standard item model
QStandardItemModel *m = new QStandardItemModel(words.count(), 2, completer);
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;
}
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);
}
void MainWindow::changeCase(int cs)
{
completer->setCaseSensitivity(cs ? Qt::CaseSensitive : Qt::CaseInsensitive);
}
void MainWindow::changeModel()
{
delete completer;
completer = new QCompleter(this);
switch (modelCombo->currentIndex()) {
default:
case 0:
{ Unsorted QDirModel
QDirModel *dirModel = new QDirModel(completer);
completer->setModel(dirModel);
contentsLabel->setText(tr("Enter file path"));
}
break;
case 1:
{ DirModel that shows full paths
DirModel *dirModel = new DirModel(completer);
completer->setModel(dirModel);
contentsLabel->setText(tr("Enter file path"));
}
break;
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;
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)));
}
void MainWindow::about()
{
QMessageBox::about(this, tr("About"), tr("This example demonstrates the "
"different features of the QCompleter class."));
}
