Struct trackball::Touch[−][src]

pub struct Touch<F: Ord, N: RealField> { /* fields omitted */ }

Touch gestures inducing slide, orbit, scale, and focus.

Implements Default and can be created with Touch::default().

All methods except Self::fingers() must be invoked on matching events fired by your 3D graphics library of choice.

Implementations

impl<F: Ord, N: RealField> Touch<F, N>[src]

pub fn compute(
    &mut self,
    fid: F,
    pos: Point2<N>,
    mvs: usize
) -> Option<(usize, Point2<N>, N, N)>[src]

Computes centroid position, roll angle, and scale ratio from finger gestures.

Parameters are:

  • fid as generic finger ID like Some(id) for touch and None for mouse events,
  • pos as current cursor/finger position in screen space,
  • mvs as number of finger moves for debouncing potential finger tap gesture with zero resulting in no delay of non-tap gestures while tap gesture can still be recognized. Use zero unless tap gestures are hardly recognized.

Returns number of fingers, centroid position, roll angle, and scale ratio in screen space in the order mentioned or None when debouncing tap gesture with non-vanishing mvs. See Self::discard() for tap gesture result.

pub fn discard(&mut self, fid: F) -> Option<(usize, Point2<N>)>[src]

Removes finger position and returns number of fingers and centroid position of tap gesture.

Returns None as long as there are finger positions or no tap gesture has been recognized.

Panics if generic finger ID fid is unknown.

pub fn fingers(&self) -> usize[src]

Number of fingers.

Trait Implementations

impl<F: Clone + Ord, N: Clone + RealField> Clone for Touch<F, N>[src]

fn clone(&self) -> Touch<F, N>[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl<F: Debug + Ord, N: Debug + RealField> Debug for Touch<F, N>[src]

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

Formats the value using the given formatter. Read more

impl<F: Default + Ord, N: Default + RealField> Default for Touch<F, N>[src]

fn default() -> Touch<F, N>[src]

Returns the “default value” for a type. Read more

Auto Trait Implementations

impl<F, N> RefUnwindSafe for Touch<F, N> where
    F: RefUnwindSafe,
    N: RefUnwindSafe, 

impl<F, N> Send for Touch<F, N> where
    F: Send, 

impl<F, N> Sync for Touch<F, N> where
    F: Sync, 

impl<F, N> Unpin for Touch<F, N> where
    N: Unpin, 

impl<F, N> UnwindSafe for Touch<F, N> where
    F: RefUnwindSafe,
    N: RefUnwindSafe + UnwindSafe, 

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<SS, SP> SupersetOf<SS> for SP where
    SS: SubsetOf<SP>, 

pub fn to_subset(&self) -> Option<SS>

The inverse inclusion map: attempts to construct self from the equivalent element of its superset. Read more

pub fn is_in_subset(&self) -> bool

Checks if self is actually part of its subset T (and can be converted to it).

pub fn to_subset_unchecked(&self) -> SS

Use with care! Same as self.to_subset but without any property checks. Always succeeds.

pub fn from_subset(element: &SS) -> SP

The inclusion map: converts self to the equivalent element of its superset.

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.