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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
class Notepad : public QMainWindow
{
Q_OBJECT
public:
Notepad();
private slots:
void open();
void save();
private:
QTextEdit *textEdit;
QAction *openAction;
QAction *saveAction;
QAction *exitAction;
QMenu *fileMenu;
};
Notepad::Notepad()
{
openAction = new QAction(tr("&Load"), this);
saveAction = new QAction(tr("&Save"), this);
exitAction = new QAction(tr("E&xit"), this);
connect(openAction, &QAction::triggered,
this, &Notepad::open);
connect(saveAction, &QAction::triggered,
this, &Notepad::save);
connect(exitAction, &QAction::triggered,
qApp, &QApplication::quit);
fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(openAction);
fileMenu->addAction(saveAction);
fileMenu->addSeparator();
fileMenu->addAction(exitAction);
textEdit = new QTextEdit;
setCentralWidget(textEdit);
setWindowTitle(tr("Notepad"));
}
void Notepad::open()
{
QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"), "",
tr("Text Files (*.txt);;C++ Files (*.cpp *.h)"));
if (!fileName.isEmpty()) {
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly)) {
QMessageBox::critical(this, tr("Error"), tr("Could not open file"));
return;
}
QTextStream in(&file);
textEdit->setText(in.readAll());
file.close();
}
}
void Notepad::save()
{
QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"), "",
tr("Text Files (*.txt);;C++ Files (*.cpp *.h)"));
if (!fileName.isEmpty()) {
QFile file(fileName);
if (!file.open(QIODevice::WriteOnly)) {
// error message
} else {
QTextStream stream(&file);
stream << textEdit->toPlainText();
stream.flush();
file.close();
}
}
}
int main(int argc, char **argv)
{
QApplication app(argc, argv);
Notepad notepad;
notepad.show();
return app.exec();
}
#include "main.moc"
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