qt5base-lts/examples/widgets/mainwindows/application/mainwindow.h

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
class QAction;
class QMenu;
class QPlainTextEdit;
class QSessionManager;
QT_END_NAMESPACE

//! [0]
class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow();

    void loadFile(const QString &fileName);

protected:
    void closeEvent(QCloseEvent *event) Q_DECL_OVERRIDE;

private slots:
    void newFile();
    void open();
    bool save();
    bool saveAs();
    void about();
    void documentWasModified();
    void commitData(QSessionManager &);

private:
    void createActions();
    void createStatusBar();
    void readSettings();
    void writeSettings();
    bool maybeSave();
    bool saveFile(const QString &fileName);
    void setCurrentFile(const QString &fileName);
    QString strippedName(const QString &fullFileName);

    QPlainTextEdit *textEdit;
    QString curFile;
};
//! [0]

#endif