question: @ Override public ConstraintWidget mousePressed ( float x , float y , ViewTransform transform , Selection selection ) { ConstraintTableLayout table = ( ConstraintTableLayout ) mWidget ; mTableClickTargets . clear ( ) ; ArrayList < Guideline > vertical = table . getVerticalGuidelines ( ) ; int l = transform . getSwingX ( table . getDrawX ( ) ) ; int t = transform . getSwingY ( table . getDrawY ( ) ) ; int column = 0 ; TableClickTarget firstTarget = new TableClickTarget ( table , column ++ , l , t - 20 - 4 , 20 , 20 ) ; mTableClickTargets . add ( firstTarget ) ; for ( ConstraintWidget v : vertical ) { int bx = transform . getSwingX ( v . getX ( ) ) + l ; TableClickTarget target = new TableClickTarget ( table , column ++ , bx , t - 20 - 4 , 20 , 20 ) ; mTableClickTargets . add ( target ) ; } ConstraintWidget widgetHit = null ; if ( mTableClickTargets . size ( ) > 0 ) { for ( TableClickTarget tableClickTarget : mTableClickTargets ) { if ( tableClickTarget . contains ( x , y ) ) { widgetHit = tableClickTarget . getTable ( ) ; break ; } } if ( selection . isEmpty ( ) ) { mTableClickTargets . clear ( ) ; } } return widgetHit ; }
target:  Handle mouse press event to add click targets. TODO: clean this up.