Struct PressStart 

pub struct PressStart {
    pub source: PressSource,
    pub id: Option<Id>,
    /* private fields */
}

Details of press start events

This type dereferences to PressSource.

Fields

source: PressSource

Source of the press

id: Option<Id>

Identifier of the widget currently under the press

Implementations

impl PressStart

pub fn coord(&self) -> Coord

Get the current press coordinate

pub fn grab(&self, id: Id, mode: GrabMode) -> GrabBuilder

Grab pan/move/press-end events for widget id

There are three types of grab (GrabMode):

• Click: send the corresponding Event::PressEnd only
• Grab (the default): send Event::PressMove and Event::PressEnd
• Pan modes: send Event::Pan on motion. Note: this is most useful when grabbing multiple touch events.

Only a single mouse grab is allowed at any one time; requesting a second will cancel the first (sending Event::PressEnd with success: false).

EventState::is_depressed will return true for the grabbing widget. Call EventState::set_grab_depress on PressMove to update the grab’s depress target. (This is done automatically for GrabMode::Click, and ends automatically when the grab ends.)

This method uses the builder pattern. On completion, Used is returned. It is expected that the requested press/pan events are all “used” (Used).

pub fn grab_click(&self, id: Id) -> GrabBuilder

Convenience wrapper for Self::grab using GrabMode::Click

pub fn grab_move(&self, id: Id) -> GrabBuilder

Convenience wrapper for Self::grab using GrabMode::Grab

Trait Implementations

impl AddAssign<Offset> for PressStart

fn add_assign(&mut self, offset: Offset)

Performs the += operation.

impl Clone for PressStart

fn clone(&self) -> PressStart

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PressStart

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

Formats the value using the given formatter.

impl Deref for PressStart

type Target = PressSource

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl PartialEq for PressStart

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for PressStart