type Alignment = Double aLeft :: Alignment aRight :: Alignment aTop :: Alignment aBottom :: Alignment aCenter :: Alignment
Values of type
Alignment are used with spacers like hAlignS to
specify where in the available space a box should be placed, if there
is extra space. It is a real number indicating what proportion of the
extra space should be placed to the left (or above) of the box. The
remaining space is placed on the oppisite side.
aLeft = 0.0 aRight = 1.0 aTop = 0.0 aBottom = 1.0 aCenter = 0.5
leftS = hAlignS aLeft ...