refactor: separate network class from Qgraphics

src/gui/network/NetworkGraphicsView.h

@@ -0,0 +1,19 @@
+#pragma once
+#include <qwidget.h>
+#include <QGraphicsView>
+#include <QGraphicsScene>
+
+class NetworkGraphicsView
+: public QGraphicsView
+{
+public:
+    NetworkGraphicsView(QWidget *parent = nullptr, QGraphicsScene* scene = nullptr);
+private:
+    QPointF panStartPos;
+
+protected:
+    void mouseMoveEvent(QMouseEvent *mouseEvent) override;
+    void mousePressEvent(QMouseEvent *event) override;
+    // void mouseReleaseEvent(QMouseEvent *event) override;
+
+};