diff -r 30204975694a -r 64ea7282611e src/tools/basetool.h
--- a/src/tools/basetool.h	Mon May 16 01:40:49 2022 +0300
+++ b/src/tools/basetool.h	Tue May 24 16:11:10 2022 +0300
@@ -23,6 +23,8 @@
 	virtual void reset() {}
 	virtual void overpaint(Canvas*, QPainter*) const {}
 	virtual QString iconName() const;
+Q_SIGNALS:
+	void desiredGridChange(const glm::mat4& matrix);
 protected:
 	QWidget* const parentWidget;
 	Document* const document;