+ Gtk::Button remove_speaker_button;
+ int width; ///< width of the circle
+ int height; ///< height of the circle
+ int x_origin; ///< x origin of our stuff within the drawing area
+ int y_origin; ///< y origin of our stuff within the drawing area
+ /** distance from the centre of the object being dragged to the mouse pointer
+ * when the drag was started (ie start_pointer - object_position).
+ */
+ double drag_offset_x;
+ double drag_offset_y;