A conditional is an expression that can do different things depending
on the value of some test. Here is a template that will insert a
linebreak between two images if the width of the first is greater
than 200 pixels:
Max200 ()
TITLE "No wider than 200"
BODY
WITH= variable im
value RENDER text "Hello"
font-size 25
IMAGE source im
IF test > value1 WIDTH im
value2 200
then LINEBREAK
else SHIM width 10
IMAGE source RENDER text "World!"
font-size 25
The IF operator takes three arguments. If
the test argument is true, the then
argument is evaluated; otherwise the else argument
is evaluated.
In this case, if the width of im is greater than 200
then a linebreak will be generated; otherwise a 10-pixel wide
shim will be generated.
The SHIM operator generates a transparent image of a
specified height and/or width. Such images are useful in controlling
the spacing of elements on the page.
