Struct DialogStackState

pub struct DialogStackState<Global, Event, Error> { /* private fields */ }

State of the dialog stack.

Add this to your global state.

** unstable **

Implementations

impl<Global, Event, Error> DialogStackState<Global, Event, Error>

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

pub fn new() -> Self

New dialog stack state.

pub fn push_dialog<Render, State>(&mut self, render: Render, state: State)

where Render: Fn(Rect, &mut Buffer, &mut dyn DialogState<Global, Event, Error>, &mut RenderContext<'_, Global>) -> Result<(), Error> + 'static, State: DialogState<Global, Event, Error> + 'static,

Push a new dialog window on the stack.

This takes

• a constructor for the AppWidget. This is called for every render and can adjust construction to the environment.
• the dialogs state.

Note

This can be called during event handling of a dialog.

pub fn pop_dialog(&mut self)

Pop the top dialog from the stack.

This can be called repeatedly if necessary.

Note

This can be called during event handling of a dialog.

pub fn is_empty(&self) -> bool

Is the dialog stack empty?

Note

This can be called during event handling of a dialog.

pub fn top_state_is<S: 'static>(&self) -> Result<bool, DialogStackError>

Test the type of the top dialog state.

Note

This will not work during event-handling of a dialog.

pub fn map_top_state_if<S, MAP, R>( &self, map: MAP, ) -> Result<R, DialogStackError>

where MAP: FnOnce(&mut S) -> R, S: DialogState<Global, Event, Error>,

Calls the closure with the top state of the stack if the type matches.

Note

This will not work during event-handling of a dialog.

Trait Implementations

impl<Global, Event, Error> AppState<Global, Event, Error> for DialogStackState<Global, Event, Error>

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

fn init( &mut self, _ctx: &mut AppContext<'_, Global, Event, Error>, ) -> Result<(), Error>

Initialize the application. Runs before the first repaint.

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

Handle an event.

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

Shutdown the application. Runs after the event-loop has ended.

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

Do error handling.

impl<Global, Event, Error> Clone for DialogStackState<Global, Event, Error>

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

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Global, Event, Error> Debug for DialogStackState<Global, Event, Error>

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

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

Formats the value using the given formatter.

impl<Global, Event, Error> Default for DialogStackState<Global, Event, Error>

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

fn default() -> Self

Returns the “default value” for a type.