peek property

double peek

The 🔲 peek is a double applied as padding to and insetting 📚 SurfaceLayer.MATERIAL.

• It may be considered to function like a border for the Surface.child content.
  • Note that Surface does not currently support actual Borders.
  • To give a border to a Surface, provide a Surface as a child to a DecoratedBox or Container.

Having declared a side(s) to receive special treatment by passing 🔀 peekAlignment, a 📏 peekRatio defines the scale by which to multiply this (these) edge inset(s).

• Defaults to thicker peekRatio == 2.0
• A larger peekRatio creates a more dramatic effect
• Thinner side(s) possible by passing 0 > peekRatio > 1

(More than one side is affected by a corner-set Alignment, such as Alignment.bottomRight.)

Implementation

final double peek, peekRatio;