qt5base-lts/examples/widgets/graphicsview/chip/mainwindow.h

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtWidgets/qwidget.h>

QT_FORWARD_DECLARE_CLASS(QGraphicsScene)
QT_FORWARD_DECLARE_CLASS(QGraphicsView)
QT_FORWARD_DECLARE_CLASS(QLabel)
QT_FORWARD_DECLARE_CLASS(QSlider)
QT_FORWARD_DECLARE_CLASS(QSplitter)

class MainWindow : public QWidget
{
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    
private:
    void setupMatrix();
    void populateScene();
    
    QGraphicsScene *scene;
    QSplitter *h1Splitter;
    QSplitter *h2Splitter;
};

#endif