Enum TapTarget 

pub enum TapTarget {
    Padded,
    ShrinkWrap,
}

How much room a small control reserves for the finger that works it.

A switch paints a track 32 pixels tall; a checkbox paints a box of 20. Neither is something a finger can be asked to hit. The reference lays both out inside a 48-pixel square and paints the small thing in the middle of it, and it makes that a theme-wide setting with a per-widget override, because it is the kind of decision an application makes once (theme_data.dart:172).

This is a layout answer, not a visual one. What the control paints does not change; the room around it does, and so does the area a click may land in.

Variants

Padded

At least MIN_TAP_TARGET on both sides — the default, as it is over there.

ShrinkWrap

Only SHRUNK_TAP_TARGET: for the dense interface that has measured its own reach and decided, which is a decision rather than an oversight.

Implementations

impl TapTarget

pub fn min_side(self) -> f32

The smallest side, in pixels, this answer reserves.

Trait Implementations

impl Clone for TapTarget

fn clone(&self) -> TapTarget

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TapTarget

impl Debug for TapTarget

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for TapTarget

fn default() -> TapTarget

Returns the “default value” for a type.

impl Eq for TapTarget

impl PartialEq for TapTarget

fn eq(&self, other: &TapTarget) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TapTarget