Packer data types

Packer

abstract handle to refer to and use the Packer geometry manager.

PackerAttributes

PackerAttribute

the PackerAttribute algebraic data type encodes the different options the Packer accepts:

type PackerAttributes = [PackerAttribute]

data PackerAttribute 
 = PackerFill PackFill
 | PackerSide CompassDirection
 | PackerPad Axis Unit
 | PackerIPad Axis Unit
 | PackerExpand Bool
 | PackerAnchor CompassDirection
   deriving Eq

for full explanation of what these attributes do, I suggest looking at documentation for Tk, here's a short summary:

• PackerFill controls how the packer should expand a components bounding box if the allocated area is larger than the natural size.
• PackerSide sets the side from which the packer should allocate a parcel.
• PackerPad sets the external padding of a packer component.
• PackerIPad sets the internal padding (i.e., treat the size of the component as slightly larger/smaller)
• PackerExpand controls if a component should soak up whatever is left inside the packer bounding box.

PackFill

algebraic type for controlling the filling behaviour of components:

data PackFill 
 = NoFill | FillX | FillY | FillBoth
   deriving Eq