mainwindow.h Example File

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QModelIndexList>

QT_FORWARD_DECLARE_CLASS(QAction)
QT_FORWARD_DECLARE_CLASS(QTextEdit)
QT_FORWARD_DECLARE_CLASS(QTreeView)

class MimetypeModel;

class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = nullptr);

private slots:
    void currentChanged(const QModelIndex &);
    void detectFile();
    void find();
    void findNext();
    void findPrevious();

private:
    void selectAndGoTo(const QModelIndex &index);
    void updateFindActions();

    MimetypeModel *m_model;
    QTreeView *m_treeView;
    QTextEdit *m_detailsText;
    QAction *m_findNextAction;
    QAction *m_findPreviousAction;
    QModelIndexList m_findMatches;
    int m_findIndex;
};

#endif // MAINWINDOW_H