feat: delete floating edge with esc

src/gui/network/Network.cpp

@@ -74,3 +74,17 @@ void Network::mouseMoved(QMouseEvent *event)
     }
 }
 
+
+void Network::keyPressEvent(QKeyEvent *event)
+{
+    if(event->key() == Qt::Key_Escape)
+    {
+        // delete floating edge
+        if(floatingEdge_)
+        {
+            scene_->removeItem(floatingEdge_);
+            delete floatingEdge_;
+            floatingEdge_=nullptr;
+        }
+    }
+}

src/gui/network/Network.h

@@ -17,7 +17,7 @@ private:
     NetworkGraphicsScene* scene_;
     NetworkGraphicsView* view_;
     FloatingEdgeGraphic* floatingEdge_=nullptr;
-    
+    void keyPressEvent(QKeyEvent *event) override;
 
 protected:
 };