Struct kas::TkData

pub struct TkData(pub u64);

The type of per-widget toolkit data.

May be used however the toolkit deems fit, except that widgets are allowed to default-construct this (i.e. set to zero), and valid values should not be zero.

Toolkits may with to transmute data to/from their own type(s). In this case they should ensure (a) that size_of::<TkData>() is sufficient, (b) that align_of::<TkData>() is sufficient, (c) gracefully handle the case TkData is larger than their type.

Methods

impl TkData

pub fn is_null(&self) -> bool

This property is true for default-constructed values but should be false after the data has been set by the toolkit.

Essentially this test is just that all data is zero.

Trait Implementations

impl Default for TkData

fn default() -> TkData

Returns the "default value" for a type.

impl Clone for TkData

fn clone(&self) -> TkData

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TkData

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.