1 files changed, 4 insertions, 4 deletions
diff --git a/c/layout.h b/c/layout.h
index 937a50c..07eee56 100644
--- a/c/layout.h
+++ b/c/layout.h
@@ -21,13 +21,13 @@ struct Dragger
 protected:
 	bool IsDown() const;
 	bool IsDouble(const long time, const POINT& pt);
-	virtual bool InDragArea(int x, int y) const;
+	virtual bool InDragArea(int x, int y) const = 0;
 	/* Perform drag, resizing relevant windows. */
-	virtual void Drag(int x, int y) const;
+	virtual void Drag(int x, int y) const = 0;
 	/* Reset dragger to automatic position. */
-	virtual void Reset() const;
+	virtual void Reset() const = 0;
 	/* Called after drag, when mouse button is released. */
-	virtual void Done() const;
+	virtual void Done() const = 0;
 private:
 	bool m_bActive = false;
 	long m_time0 = 0;