Tooltip_Stylesheet.yaml

A tooltip: a short label that appears beside what the pointer rests on.

The look of Tooltip (in Tooltips). How component stylesheets work.

The stylesheet

# Tooltip: 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: 24
      background: inverse_surface
      corner_radius: extra_small
      align_content: center
      padding:
        left: 8
        right: 8
        top: 0
        bottom: 0
  - id: text
    style:
      foreground: inverse_on_surface
      flex: expand_horizontal
      min_width: 0

How it is tied to the component

Tooltip_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: Tooltip, 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 (Container)

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	24	Pixels, auto (its content's size, or stretched), or a percentage of the parent such as 50%.
background	inverse_surface	Its fill: a theme role such as surface, #RRGGBB, any CSS colour, or a gradient such as linear-gradient(90deg, primary, tertiary).
corner_radius	extra_small	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.
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.
padding	left 8, right 8, top 0, bottom 0	Space inside it: one number, or {left, right, top, bottom}.

text (Text)

Field	Value	What it does
foreground	inverse_on_surface	Its text or glyph colour: a theme role, #RRGGBB, any CSS colour, or a gradient.
flex	expand_horizontal	How it takes room in its parent: none (the default) is as big as its content and never squeezed, expand_horizontal and expand_vertical take the room left over in that direction, fill both.
min_width	0	The least width it can take.

What it makes

With text: Hello, width: 120, each part's style is:

root:
  width: 120
  height: 24
  background: inverse_surface
  corner_radius: extra_small
  align_content: center
  padding: {left: 8, right: 8, top: 0, bottom: 0}
text: {foreground: inverse_on_surface, flex: expand_horizontal, min_width: 0}

Changing it

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

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