| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the examples of the Qt Toolkit. |
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| ** Commercial License Usage |
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| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
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| ****************************************************************************/ |
| |
| #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" |
| |