pub enum Force {
Calibrated {
force: f64,
max_possible_force: f64,
altitude_angle: Option<f64>,
},
Normalized(f64),
}
Expand description
Describes the force of a touch event
Variants§
Calibrated
On iOS, the force is calibrated so that the same number corresponds to roughly the same amount of pressure on the screen regardless of the device.
Fields
force: f64
The force of the touch, where a value of 1.0 represents the force of an average touch (predetermined by the system, not user-specific).
The force reported by Apple Pencil is measured along the axis of the
pencil. If you want a force perpendicular to the device, you need to
calculate this value using the altitude_angle
value.
Normalized(f64)
If the platform reports the force as normalized, we have no way of knowing how much pressure 1.0 corresponds to – we know it’s the maximum amount of force, but as to how much force, you might either have to press really really hard, or not hard at all, depending on the device.
Implementations§
source§impl Force
impl Force
sourcepub fn normalized(&self) -> f64
pub fn normalized(&self) -> f64
Returns the force normalized to the range between 0.0 and 1.0 inclusive.
Instead of normalizing the force, you should prefer to handle
Force::Calibrated
so that the amount of force the user has to apply is
consistent across devices.
Trait Implementations§
source§impl PartialEq for Force
impl PartialEq for Force
impl Copy for Force
impl StructuralPartialEq for Force
Auto Trait Implementations§
impl Freeze for Force
impl RefUnwindSafe for Force
impl Send for Force
impl Sync for Force
impl Unpin for Force
impl UnwindSafe for Force
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
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(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.