From c99ff181003c565385c21b92ca15161fbdff2bd8 Mon Sep 17 00:00:00 2001 From: Sam Anthony Date: Tue, 24 Feb 2026 17:49:26 -0500 Subject: add layout constraints and abs/rel units --- len.go | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 len.go (limited to 'len.go') diff --git a/len.go b/len.go new file mode 100644 index 0000000..895688d --- /dev/null +++ b/len.go @@ -0,0 +1,25 @@ +package gui + +// TODO: add font-size-relative units once a text rendering package is added. + +// Length allows distance or size to be expressed in absolute or relative units. +type Length interface { + // Px resolves the Length to pixels for the given parent Env's size in pixels. + Px(parent int) int +} + +// Px is a Length expressed in pixels. +type Px int + +// Px implements the Length interface. +func (p Px) Px(parent int) int { return int(p) } + +// Relative is a Length relative to the width or height of the parent Env. +// +// Relative(0.10) <=> 10%. +type Relative float64 + +// Px implements the Length interface. +func (r Relative) Px(parent int) int { + return int(float64(r) * float64(parent)) +} -- cgit v1.2.3