editor/mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
class QGraphicsScene;
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

protected:
    bool eventFilter(QObject *obj, QEvent *event) override;

private slots:
    void on_listWidget_currentTextChanged(const QString &currentText);

    void on_pushButton_clicked();

private:
    void createComponents();

    Ui::MainWindow *ui;
    QGraphicsScene *m_scene;
    QString selectedComponentType;
};

#endif // MAINWINDOW_H