diff --git a/mapview/2D/HasMoveableNodes.h b/mapview/2D/HasMoveableNodes.h
index 610eeee..89e55e7 100644
--- a/mapview/2D/HasMoveableNodes.h
+++ b/mapview/2D/HasMoveableNodes.h
@@ -36,9 +36,11 @@ public:
 	/** get a list of all nodes that are selectable / moveable */
 	virtual std::vector<MoveableNode> getMoveableNodes() const = 0;
 
-	/** the given node was moved */
+	/** the given node is currently moved */
 	virtual void onNodeMove(MapView2D* v, const int userIdx, const Point2 newPos) = 0;
 
+	/** the given node was previously moved */
+	virtual void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) = 0;
 
 	/** the given node was selected */
 	virtual void onNodeSelect(MapView2D* v, const int userIdx) {
diff --git a/mapview/2D/MV2DElementAccessPoint.h b/mapview/2D/MV2DElementAccessPoint.h
index 3afc9b3..e89388a 100644
--- a/mapview/2D/MV2DElementAccessPoint.h
+++ b/mapview/2D/MV2DElementAccessPoint.h
@@ -84,6 +84,11 @@ public:
 		if (userIdx == 0) {ap->pos.x = newPos.x; ap->pos.y = newPos.y;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
 
 	virtual void mousePressed(MapView2D* v, const Point2 p) override {
 		(void) v;
diff --git a/mapview/2D/MV2DElementBeacon.h b/mapview/2D/MV2DElementBeacon.h
index d836def..ea329eb 100644
--- a/mapview/2D/MV2DElementBeacon.h
+++ b/mapview/2D/MV2DElementBeacon.h
@@ -77,6 +77,12 @@ public:
 		if (userIdx == 0) {b->pos.x = newPos.x; b->pos.y = newPos.y;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
+
 	virtual void onFocus() override {
 		;
 	}
diff --git a/mapview/2D/MV2DElementElevator.h b/mapview/2D/MV2DElementElevator.h
index 2fe6c6c..3a03257 100644
--- a/mapview/2D/MV2DElementElevator.h
+++ b/mapview/2D/MV2DElementElevator.h
@@ -94,6 +94,12 @@ public:
 		if (userIdx == 0) {elevator->center.x = newPos.x; elevator->center.y = newPos.y;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
+
 
 	virtual void mousePressed(MapView2D* v, const Point2 p) override {
 		(void) v;
diff --git a/mapview/2D/MV2DElementFingerprintLocation.h b/mapview/2D/MV2DElementFingerprintLocation.h
index 89eea4e..1f38b03 100644
--- a/mapview/2D/MV2DElementFingerprintLocation.h
+++ b/mapview/2D/MV2DElementFingerprintLocation.h
@@ -82,6 +82,12 @@ public:
 		if (userIdx == 0) {fpl->posOnFloor = newPos;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
+
 	virtual void onFocus() override {
 		;
 	}
diff --git a/mapview/2D/MV2DElementFloorObstacleDoor.cpp b/mapview/2D/MV2DElementFloorObstacleDoor.cpp
index 18c82a5..fd22f99 100644
--- a/mapview/2D/MV2DElementFloorObstacleDoor.cpp
+++ b/mapview/2D/MV2DElementFloorObstacleDoor.cpp
@@ -128,12 +128,16 @@ std::vector<MoveableNode> MV2DElementFloorObstacleDoor::getMoveableNodes() const
 	return nodes;
 }
 
+void MV2DElementFloorObstacleDoor::onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) {
+	emit v->onElementChange(this);
+}
+
 void MV2DElementFloorObstacleDoor::onNodeMove(MapView2D* v, const int userIdx, const Point2 newPos) {
 	switch (userIdx) {
 	case 0: fo->from = newPos; break;
 	case 1: fo->to = newPos; break;
 	}
-	emit v->onElementChange(this);
+//	emit v->onElementChange(this);
 }
 
 bool MV2DElementFloorObstacleDoor::keyPressEvent(MapView2D* v, QKeyEvent *e) {
diff --git a/mapview/2D/MV2DElementFloorObstacleDoor.h b/mapview/2D/MV2DElementFloorObstacleDoor.h
index ba60924..848a930 100644
--- a/mapview/2D/MV2DElementFloorObstacleDoor.h
+++ b/mapview/2D/MV2DElementFloorObstacleDoor.h
@@ -41,9 +41,10 @@ public:
 	/** get a list of all nodes that are selectable / moveable */
 	virtual std::vector<MoveableNode> getMoveableNodes() const override;
 
-	/** the given node was moved */
 	virtual void onNodeMove(MapView2D* v, const int userIdx, const Point2 newPos) override;
 
+	virtual void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override;
+
 	virtual bool keyPressEvent(MapView2D* v, QKeyEvent *e) override;
 
 };
diff --git a/mapview/2D/MV2DElementFloorObstacleLine.h b/mapview/2D/MV2DElementFloorObstacleLine.h
index c70da1b..2ac327e 100644
--- a/mapview/2D/MV2DElementFloorObstacleLine.h
+++ b/mapview/2D/MV2DElementFloorObstacleLine.h
@@ -129,6 +129,13 @@ public:
 		if (userIdx == 1) {fo->to.x = newPos.x; fo->to.y = newPos.y;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
+
+
 };
 
 #endif // MV2DELEMENTFLOOROBSTACLELINE_H
diff --git a/mapview/2D/MV2DElementFloorObstacleObject.cpp b/mapview/2D/MV2DElementFloorObstacleObject.cpp
index 33f34e1..1ee73cc 100644
--- a/mapview/2D/MV2DElementFloorObstacleObject.cpp
+++ b/mapview/2D/MV2DElementFloorObstacleObject.cpp
@@ -102,6 +102,11 @@ void MV2DElementFloorObstacleObject::onNodeMove(MapView2D* v, const int userIdx,
 	if (userIdx == 0) {fo->pos.x = newPos.x; fo->pos.y = newPos.y;}
 }
 
+void MV2DElementFloorObstacleObject::onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) {
+	(void) userIdx;
+	(void) newPos;
+	emit v->onElementChange(this);
+}
 
 void MV2DElementFloorObstacleObject::mousePressed(MapView2D* v, const Point2 p) {
 	(void) v;
diff --git a/mapview/2D/MV2DElementFloorObstacleObject.h b/mapview/2D/MV2DElementFloorObstacleObject.h
index de64f52..172574d 100644
--- a/mapview/2D/MV2DElementFloorObstacleObject.h
+++ b/mapview/2D/MV2DElementFloorObstacleObject.h
@@ -34,6 +34,8 @@ public:
 
 	virtual void onNodeMove(MapView2D* v, const int userIdx, const Point2 newPos) override;
 
+	virtual void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override;
+
 	virtual void mousePressed(MapView2D* v, const Point2 p) override;
 
 	virtual void mouseMove(MapView2D* v, const Point2 p) override;
diff --git a/mapview/2D/MV2DElementFloorOutlinePolygon.h b/mapview/2D/MV2DElementFloorOutlinePolygon.h
index 9211d55..80998db 100644
--- a/mapview/2D/MV2DElementFloorOutlinePolygon.h
+++ b/mapview/2D/MV2DElementFloorOutlinePolygon.h
@@ -103,12 +103,19 @@ public:
 	}
 
 	/** the given node was moved */
-	virtual void onNodeMove(MapView2D* v, const int userIdx, const Point2 newPos) override {
+	void onNodeMove(MapView2D* v, const int userIdx, const Point2 newPos) override {
 		(void) v;
 		fo.poly.points[userIdx].x = newPos.x;
 		fo.poly.points[userIdx].y = newPos.y;
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
+
+
 //	virtual void mousePressed(MapView2D* v, const Point2 p) override {
 //		(void) v;
 //		(void) p;
diff --git a/mapview/2D/MV2DElementGroundTruthPoint.h b/mapview/2D/MV2DElementGroundTruthPoint.h
index e5abacf..036a357 100644
--- a/mapview/2D/MV2DElementGroundTruthPoint.h
+++ b/mapview/2D/MV2DElementGroundTruthPoint.h
@@ -81,6 +81,11 @@ public:
         if (userIdx == 0) {gtp->pos.x = newPos.x; gtp->pos.y = newPos.y;}
     }
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
 
     /** mouse pressed at the given point */
     virtual void mousePressed(MapView2D* v, const Point2 p) override {
diff --git a/mapview/2D/MV2DElementPOI.h b/mapview/2D/MV2DElementPOI.h
index a3f6bc9..b79f885 100644
--- a/mapview/2D/MV2DElementPOI.h
+++ b/mapview/2D/MV2DElementPOI.h
@@ -81,6 +81,11 @@ public:
 		if (userIdx == 0) {poi->pos = newPos;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
 
 	/** mouse pressed at the given point */
 	virtual void mousePressed(MapView2D* v, const Point2 p) override {
diff --git a/mapview/2D/MV2DElementRegistrationPoint.h b/mapview/2D/MV2DElementRegistrationPoint.h
index 2e56a03..7b21b79 100644
--- a/mapview/2D/MV2DElementRegistrationPoint.h
+++ b/mapview/2D/MV2DElementRegistrationPoint.h
@@ -77,6 +77,11 @@ public:
 		if (userIdx == 0) {reg->posOnMap_m.x = newPos.x; reg->posOnMap_m.y = newPos.y;}
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
 
 	virtual void mousePressed(MapView2D* v, const Point2 p) override {
 		(void) v;
diff --git a/mapview/2D/MV2DElementStair.h b/mapview/2D/MV2DElementStair.h
index f0465f7..a5b0f5e 100644
--- a/mapview/2D/MV2DElementStair.h
+++ b/mapview/2D/MV2DElementStair.h
@@ -307,6 +307,12 @@ public:
 
 	}
 
+	void onNodeMoved(MapView2D* v, const int userIdx, const Point2 newPos) override {
+		(void) userIdx;
+		(void) newPos;
+		emit v->onElementChange(this);
+	}
+
 	void onNodeSelect(MapView2D* v, const int userIdx) override {
 		HasMoveableNodes::onNodeSelect(v, userIdx);
 		emit v->onElementChange(this);
diff --git a/mapview/2D/tools/ToolSelector.h b/mapview/2D/tools/ToolSelector.h
index 5fa19bb..dae6238 100644
--- a/mapview/2D/tools/ToolSelector.h
+++ b/mapview/2D/tools/ToolSelector.h
@@ -120,9 +120,10 @@ private:
 //		// left mouse button?
 //		if (e->button() == Qt::MouseButton::LeftButton) {
 //			// element has selectedable nodes? try to select one
-//			if (dynamic_cast<HasMoveableNodes*>(me)) {
-//				if (selectNode(m, p, dynamic_cast<HasMoveableNodes*>(me))) {return;}
-//			}
+			if (dynamic_cast<HasMoveableNodes*>(me)) {
+				//if (selectNode(m, p, dynamic_cast<HasMoveableNodes*>(me))) {return;}
+				if (nodeMoved(m, p, dynamic_cast<HasMoveableNodes*>(me))) {return;}
+			}
 //		}
 
 		// otherwise: let the element itself process all events
@@ -173,6 +174,21 @@ private:
 
 	}
 
+	/** moved the currently selected node (now done). true if successful */
+	bool nodeMoved(MapView2D* v, Point2 p, HasMoveableNodes* elem) {
+
+		// no node selected? -> done
+		if (elem->getSelectedNode() == -1) {return false;}
+
+		// snap the node
+		const Point2 pSnapped = v->getScaler().snap(p);
+
+		// moved (done)
+		elem->onNodeMoved(v, elem->getSelectedNode(), pSnapped);
+		return true;
+
+	}
+
 
 
 private:
diff --git a/mapview/3D/navMesh/NavMeshRenderer.h b/mapview/3D/navMesh/NavMeshRenderer.h
index 0e24a86..5b89706 100644
--- a/mapview/3D/navMesh/NavMeshRenderer.h
+++ b/mapview/3D/navMesh/NavMeshRenderer.h
@@ -16,7 +16,7 @@
 #include "../misc/Shader.h"
 #include "../misc/TriangleData.h"
 
-class NavMeshRenderer : protected QOpenGLFunctions {
+class NavMeshRenderer {
 
 private:
 
@@ -89,7 +89,7 @@ public:
 
 		rs.shader->setVertices(data.getVertices().data());
 		rs.shader->setVertexColor(data.getRGBA().data());
-		glDrawArrays(GL_TRIANGLES, 0, data.getVertices().size()/3);
+		rs.funcs->glDrawArrays(GL_TRIANGLES, 0, data.getVertices().size()/3);
 		rs.shader->unsetVertices();
 		rs.shader->unsetVertexColor();
 
@@ -133,7 +133,7 @@ public:
 
 		rs.shader->setVertices(data.getVertices().data());
 		rs.shader->setVertexColor(data.getRGBA().data());
-		glDrawArrays(GL_LINES, 0, data.getVertices().size()/3);
+		rs.funcs->glDrawArrays(GL_LINES, 0, data.getVertices().size()/3);
 		rs.shader->unsetVertices();
 		rs.shader->unsetVertexColor();