XYWH Shorthands

For the arguments x, y, width, and height, a few convenient shorthands are available.

middle for x and width refer to the deck's width / 2
middle for y and height refer to the deck's height / 2
The word center behaves the same way
deck refers to the deck's width for x and width
deck refers to the deck's height for y and height
You can offset from the middle by using + or - operators, e.g. middle + 1in
You can offset from the deck width or height using the + or - operators, e.g. deck - 1in or deck - 2mm
You can offset from the deck width or height using, e.g. deck / 3
Works with all unit conversion too, e.g. middle + 1 cell. See units.

These are all passed as strings. So you will need to quote them in Ruby, or just plain in your layout YAML.

Note that the following are NOT supported:

The += operator when using extends in a layout file
Complicated formulas. We're not evaluating this as code, we're looking for these specific patterns and applying them. Anything more complicated you'll have to handle with Ruby code.

Samples

_shorthands.rb

../samples/units/_shorthands.rb