diff -r 6bcb284679d4 -r 0e729e681a2c src/ui/canvas.h
--- a/src/ui/canvas.h	Wed May 25 17:56:30 2022 +0300
+++ b/src/ui/canvas.h	Wed May 25 18:29:49 2022 +0300
@@ -19,8 +19,8 @@
 	std::vector<glm::vec3> previewPolygon;
 	glm::vec3 previewPoint;
 	bool isconcave = false;
+	EditingMode mode = SelectMode;
 };
-
 class Canvas : public PartRenderer
 {
 	Q_OBJECT
@@ -44,8 +44,8 @@
 	const glm::mat4& getGridMatrix() const;
 	void closeShape();
 	glm::vec3 cameraVector() const;
-	DrawState drawState;
-	EditingMode mode = SelectMode;
+	std::optional<glm::vec3> worldPosition;
+	DrawState* drawState = nullptr;
 public Q_SLOTS:
 	void handleSelectionChange(const QSet<ldraw::id_t>& selectedIds, const QSet<ldraw::id_t>& deselectedIds);
 	void rebuildVertices(Document *document);
@@ -59,8 +59,8 @@
 Q_SIGNALS:
 	void newStatusText(const QString& newStatusText);
 	void selectionChanged(const QSet<ldraw::id_t>& newSelection);
-	void mouseClick(Canvas* canvas, QMouseEvent* event);
-	void mouseMove(Canvas* canvas, QMouseEvent* event);
+	void mouseClick(QMouseEvent* event);
+	void mouseMove(QMouseEvent* event);
 private:
 	bool isGridPerpendicularToScreen(float threshold) const;
 	QVector<QPointF> convertWorldPointsToScreenPoints(const std::vector<glm::vec3>& worldPoints) const;
@@ -69,7 +69,6 @@
 	std::optional<GridProgram> gridProgram;
 	std::optional<AxesProgram> axesProgram;
 	std::optional<VertexProgram> vertexProgram;
-	std::optional<glm::vec3> worldPosition;
 	glm::mat4 gridMatrix;
 	geom::Plane gridPlane;
 	int totalMouseMove = 0;