Struct EyedropperState 

pub struct EyedropperState { /* private fields */ }

What an Eyedropper and an EyedropperArea share, and how a color reaches them: from the area, or from whoever knows the color under the pointer through pick. Nothing here can read the screen, so the color always comes from the caller.

Implementations

impl EyedropperState

pub fn new() -> Self

Not armed, with no color yet.

pub fn on_pick(self, handler: impl Fn(Color) + 'static) -> Self

Runs handler with each color picked.

pub fn stay_armed(self, stay: bool) -> Self

Stays armed after a pick, to take several in a row (by default it disarms).

pub fn is_armed(&self) -> bool

Whether the next click on the picture picks a color.

pub fn set_armed(&self, armed: bool)

Arms it or disarms it.

pub fn picked(&self) -> Option<Color>

The last color picked.

pub fn pick(&self, color: Color) -> bool

Tells it the color of the point clicked. It counts only while armed, and returns whether it did.

Trait Implementations

impl Clone for EyedropperState

fn clone(&self) -> EyedropperState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EyedropperState

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

Formats the value using the given formatter.

impl Default for EyedropperState

fn default() -> Self

Returns the “default value” for a type.