ButtonText_Stylesheet.yaml

A text button: the lowest-emphasis button, for dialogs and cards.

The look of ButtonText (in Buttons). How component stylesheets work.

The stylesheet

# ButtonText: the look of each part of the component, by the part's id.
# A value in {{ }} is one of the component's parameters.
styles:
  - id: root
    style:
      width: "{{ width }}"
      height: "{{ height }}"
      align_content: center
      background: transparent
      corner_radius: "{{ corner_radius }}"
      padding:
        left: 12
        right: 12
        top: 0
        bottom: 0
  - id: label
    style:
      foreground: primary

How it is tied to the component

ButtonText_Component.yaml holds the structure: the parts, each with an id. This file holds the look: each rule's id names a part, and its style is what that part looks like. When a view uses component: ButtonText, Tesserae fills in the parameters (a value like "{{ width }}" becomes the width the view passed), picks a branch of any if:, and puts each rule under the style the part already has, so a part's own style: always wins.

The parts

root (Rect)

Field	Value	What it does
width	the width parameter	Pixels, auto (its content's size, or stretched), or a percentage of the parent such as 50%.
height	the height parameter	Pixels, auto (its content's size, or stretched), or a percentage of the parent such as 50%.
align_content	center	Where its children sit: top_left, top, top_right, left, center, right, bottom_left, bottom or bottom_right. Not set, they fill the space across the layout.
background	transparent	Its fill: a theme role such as surface, #RRGGBB, any CSS colour, or a gradient such as linear-gradient(90deg, primary, tertiary).
corner_radius	the corner_radius parameter	Pixels, or a shape token (none to extra_large, or full for a pill or circle). Per corner: a list [top_left, top_right, bottom_right, bottom_left], or a mapping of corners and edges (top, right, bottom, left) with the rest square.
padding	left 12, right 12, top 0, bottom 0	Space inside it: one number, or {left, right, top, bottom}.

label (Text)

Field	Value	What it does
foreground	primary	Its text or glyph colour: a theme role, #RRGGBB, any CSS colour, or a gradient.

What it makes

With label: Go, width: 120, height: 40, corner_radius: 20, each part's style is:

root:
  width: 120
  height: 40
  align_content: center
  background: transparent
  corner_radius: 20
  padding: {left: 12, right: 12, top: 0, bottom: 0}
label: {foreground: primary}

Changing it

Put a ButtonText_Stylesheet.yaml next to your views. Its rules go over this file's, field by field:

styles:
  - id: root
    style: {background: tertiary}