Trait DialogState

pub trait DialogState<Global, Event, Error>: Any
where
    Global: 'static,
    Event: Send + 'static,
    Error: Send + 'static,
{
    // Required methods
    fn active(&self) -> bool;
    fn event(
        &mut self,
        event: &Event,
        ctx: &mut AppContext<'_, Global, Event, Error>,
    ) -> Result<Control<Event>, Error>;
}

Trait for a dialogs state.

A separate trait is necessary because this needs Any in the vtable. It mimics AppState without a few lifecycle functions.

Required Methods

fn active(&self) -> bool

Is the dialog still active.

Whenever this goes to false during event handling the dialog will be popped from the stack.

fn event( &mut self, event: &Event, ctx: &mut AppContext<'_, Global, Event, Error>, ) -> Result<Control<Event>, Error>

Handle an event.

Implementations

impl<Global, Event, Error> dyn DialogState<Global, Event, Error>

where Global: 'static, Event: Send + 'static, Error: Send + 'static,

pub fn downcast_ref<R: DialogState<Global, Event, Error>>(&self) -> Option<&R>

down cast Any style.

pub fn downcast_mut<R: DialogState<Global, Event, Error>>( &mut self, ) -> Option<&mut R>

down cast Any style.

Implementors

impl<Global, Event, Error> DialogState<Global, Event, Error> for FileDialogState<Global, Event, Error>

where for<'a> &'a Event: TryFrom<&'a Event>, Global: 'static, Event: Send + 'static, Error: Send + 'static + From<Error>,

impl<Global, Event, Error> DialogState<Global, Event, Error> for MsgDialogState

where Global: 'static, Event: Send + 'static, Error: Send + 'static, for<'a> &'a Event: TryFrom<&'a Event>,