question: private void drawXAxisMarker ( Canvas canvas , double value , NumberFormat numberFormat , int spacing ) { String marker = chartByDistance ? numberFormat . format ( value ) : StringUtils . formatElapsedTime ( ( long ) value ) ; Rect rect = getRect ( xAxisMarkerPaint , marker ) ; canvas . drawText ( marker , getX ( value ) , topBorder + effectiveHeight + spacing + rect . height ( ) , xAxisMarkerPaint ) ; }
target:  Draws a x axis marker.