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Prepare PropertyAnimationBinding for use with C++

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Don't take the binding as a Rust function, take a ready-to-set Rc<dyn
Binding> trait object.
This commit is contained in:
Simon Hausmann 2020-06-25 11:55:24 +02:00
parent c40840baf9
commit a19c9619fa
1 changed files with 7 additions and 4 deletions
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11
sixtyfps_runtime/corelib/abi/properties.rs
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@ -13,7 +13,10 @@ use std::rc::{Rc, Weak};
thread_local!(static CURRENT_BINDING : RefCell<Option<Rc<dyn PropertyNotify>>> = Default::default());
trait Binding<T> {
/// A binding trait object can be used to dynamically produces values for a property.
pub trait Binding<T> {
/// This function is called by the property to evaluate the binding and produce a new value. The
/// previous property value is provided in the value parameter.
fn evaluate(self: Rc<Self>, value: &mut T, context: &EvaluationContext);
/// This function is used to notify the binding that one of the dependencies was changed
@ -269,7 +272,7 @@ impl<T: Clone + InterpolatedPropertyValue + 'static> Property<T> {
animation_data: &PropertyAnimation,
) -> Rc<RefCell<PropertyAnimationBinding<T>>> {
let animation = Rc::new(RefCell::new(PropertyAnimationBinding::new_with_binding(
f,
Property::make_binding(f),
animation_data,
self.inner.clone(),
)));
@ -601,14 +604,14 @@ impl<T: InterpolatedPropertyValue> PropertyAnimationBinding<T> {
/// Creates a new property animation that is set up to animate between the values produced
/// by the give binding function.
pub fn new_with_binding(
binding_function: impl (Fn(&EvaluationContext) -> T) + 'static,
binding: Rc<dyn Binding<T>>,
animation_data: &crate::abi::primitives::PropertyAnimation,
notifier: Rc<dyn PropertyNotify>,
) -> Self {
let mut this: PropertyAnimationBinding<T> = Default::default();
this.keep_alive = true;
this.details = animation_data.clone();
this.binding = Some(Property::make_binding(binding_function));
this.binding = Some(binding);
this.notify = Some(Rc::downgrade(&notifier));
this
}