convert_bin_window_to_widget_coords

Description:

public void convert_bin_window_to_widget_coords (int bx, int by, out int wx, out int wy)

Converts bin_window coordinates to widget relative coordinates.

this	a `GtkTreeView`
bx	bin_window X coordinate
by	bin_window Y coordinate
wx	return location for widget X coordinate
wy	return location for widget Y coordinate