init commit

graphicsview.h

@@ -0,0 +1,18 @@
+#ifndef GRAPHICSVIEW_H
+#define GRAPHICSVIEW_H
+
+#include <QGraphicsView>
+
+class GraphicsView : public QGraphicsView
+{
+public:
+    GraphicsView(QWidget *parent = nullptr);
+
+private:
+    void mousePressEvent(QMouseEvent * event) override;
+    void mouseMoveEvent(QMouseEvent * event) override;
+    void mouseReleaseEvent(QMouseEvent * event) override;
+    void wheelEvent(QWheelEvent *event) override;
+};
+
+#endif // GRAPHICSVIEW_H