pub struct TouchState { /* private fields */ }Expand description
Tracks every active touch across every known device. Lives on
App; widgets never see this directly.
Implementations§
Source§impl TouchState
impl TouchState
pub fn new() -> Self
pub fn on_start( &mut self, device: TouchDeviceId, id: TouchId, pos: Point, force: Option<f32>, )
pub fn on_move( &mut self, device: TouchDeviceId, id: TouchId, pos: Point, force: Option<f32>, )
pub fn on_end_or_cancel(&mut self, device: TouchDeviceId, id: TouchId)
Sourcepub fn update_gesture(&mut self)
pub fn update_gesture(&mut self)
Recompute the per-frame aggregate. Called by App right before
the multi-touch value is published, so every paint / on_event
in the same frame sees consistent deltas.
pub fn current(&self) -> Option<MultiTouchInfo>
Sourcepub fn active_count(&self) -> usize
pub fn active_count(&self) -> usize
Total number of fingers currently down (across all devices). Useful as a lightweight “are we in a gesture?” probe when a widget doesn’t care about the per-delta aggregate.
Trait Implementations§
Source§impl Default for TouchState
impl Default for TouchState
Source§fn default() -> TouchState
fn default() -> TouchState
Returns the “default value” for a type. Read more
Auto Trait Implementations§
impl Freeze for TouchState
impl RefUnwindSafe for TouchState
impl Send for TouchState
impl Sync for TouchState
impl Unpin for TouchState
impl UnsafeUnpin for TouchState
impl UnwindSafe for TouchState
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T: ?Sized,
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