CategoryTimeBox[] is in ascending order of the respective ratio
set TimeBoundingBox of CategoryTimeBox[] in descending ratio order
*/
curr_timebox = avebox.getCurrentTimeBoundingBox();
curr_timebox.reinitialize();
if ( isDisplayTypeEqualWeighted() ) {
vis_typeboxes_length = 0;
for ( idx = typeboxes.length-1; idx >= 0; idx-- ) {
if ( typeboxes[ idx ].isCategoryVisiblySearchable() )
vis_typeboxes_length++ ;