refactor: change pan method

src/gui/network/NetworkGraphicsScene.cpp

@@ -7,6 +7,10 @@
 NetworkGraphicsScene::NetworkGraphicsScene()
 : QGraphicsScene() 
 {
+    sceneWidth_ = 64000;
+    sceneHeight_ = 64000;
+
+    setSceneRect(sceneWidth_/-2.0f, sceneHeight_/-2.0f, sceneWidth_, sceneHeight_);
     
 }
 

src/gui/network/NetworkGraphicsScene.h

@@ -8,5 +8,7 @@ class NetworkGraphicsScene
 public:
     NetworkGraphicsScene();
 private:
+    uint sceneWidth_;
+    uint sceneHeight_;
 protected:
 };

src/gui/network/NetworkGraphicsView.cpp

@@ -58,7 +58,8 @@ void NetworkGraphicsView::mouseMoveEvent(QMouseEvent *mouseEvent)
         std::cout << "delta: " << delta.x() << " " << delta.y() << "\n";
 
         float speed = 1.0f;
-        setSceneRect(sceneRect().translated(-delta.x()*speed, -delta.y()*speed));
+        horizontalScrollBar()->setValue(horizontalScrollBar()->value() - delta.x());
+        verticalScrollBar()->setValue(verticalScrollBar()->value() - delta.y());
         panStartPos = mouseEvent->pos();
         mouseEvent->accept();
         return;