+ void set_negative_allowed (bool yn);
+
+ ArdourWidgets::ArdourButton* left_btn () { return &_left_btn; }
+ ArdourWidgets::ArdourButton* right_btn () { return &_right_btn; }
+
+ /** Alter cairo scaling during rendering.
+ *
+ * Used by clocks that resize themselves
+ * to fit any given space. Can lead
+ * to font distortion.
+ */
+ void set_scale (double x, double y);
+
+ static void print_minsec (samplepos_t, char* buf, size_t bufsize, float sample_rate);