Enum widgetry::Transition [−][src]
pub enum Transition<A> { Keep, KeepWithMouseover, Pop, ModifyState(Box<dyn FnOnce(&mut Box<dyn State<A>>, &mut EventCtx<'_>, &mut A)>), ReplaceWithData(Box<dyn FnOnce(Box<dyn State<A>>, &mut EventCtx<'_>, &mut A) -> Vec<Box<dyn State<A>>>>), Push(Box<dyn State<A>>), Replace(Box<dyn State<A>>), Clear(Vec<Box<dyn State<A>>>), Multi(Vec<Transition<A>>), }
Expand description
When a state responds to an event, it can specify some way to manipulate the stack of states.
Variants
Don’t do anything, keep the current state as the active one
Keep the current state as the active one, but immediately call event
again with a mouse
moved event
Destroy the current state, and resume from the previous one
If a state needs to pass data back to its parent, use this. In the callback, you have to downcast the previous state to populate it with data.
ReplaceWithData(Box<dyn FnOnce(Box<dyn State<A>>, &mut EventCtx<'_>, &mut A) -> Vec<Box<dyn State<A>>>>)
Push a new active state on the top of the stack.
Replace the current state with a new one. Equivalent to Pop, then Push.
Replace the entire stack of states with this stack.
Multi(Vec<Transition<A>>)
Execute a sequence of transitions in order.
Auto Trait Implementations
impl<A> !RefUnwindSafe for Transition<A>
impl<A> !Send for Transition<A>
impl<A> !Sync for Transition<A>
impl<A> Unpin for Transition<A>
impl<A> !UnwindSafe for Transition<A>
Blanket Implementations
Mutably borrows from an owned value. Read more
impl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
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pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
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Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
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pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
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(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
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type Output = T
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