[−][src]Trait widgetry::SimpleState

pub trait SimpleState<A> {
    fn on_click(
        &mut self, 
        ctx: &mut EventCtx<'_>, 
        app: &mut A, 
        action: &str, 
        panel: &Panel
    ) -> Transition<A>;

    fn panel_changed(
        &mut self, 
        _: &mut EventCtx<'_>, 
        _: &mut A, 
        _: &Panel
    ) -> Option<Transition<A>> { ... }

    fn on_mouseover(&mut self, _: &mut EventCtx<'_>, _: &mut A) { ... }

    fn other_event(&mut self, _: &mut EventCtx<'_>, _: &mut A) -> Transition<A> { ... }

    fn draw(&self, _: &mut GfxCtx<'_>, _: &A) { ... }

    fn draw_baselayer(&self) -> DrawBaselayer { ... }
}

Many states fit a pattern of managing a single panel, handling mouseover events, and other interactions on the map. Implementing this instead of State reduces some boilerplate.

Required methods

fn on_click(
    &mut self,
    ctx: &mut EventCtx<'_>,
    app: &mut A,
    action: &str,
    panel: &Panel
) -> Transition<A>

Called when something on the panel has been clicked. Since the action is just a string, the fallback case can just use unreachable!().

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Provided methods

fn panel_changed(
    &mut self,
    _: &mut EventCtx<'_>,
    _: &mut A,
    _: &Panel
) -> Option<Transition<A>>

Called when something on the panel has changed. If a transition is returned, stop handling the event and immediately apply the transition.

fn on_mouseover(&mut self, _: &mut EventCtx<'_>, _: &mut A)

Called when the mouse has moved.

fn other_event(&mut self, _: &mut EventCtx<'_>, _: &mut A) -> Transition<A>

If a panel on_click event didn't occur and panel_changed didn't return transition, then call this to handle all other events.

fn draw(&self, _: &mut GfxCtx<'_>, _: &A)

fn draw_baselayer(&self) -> DrawBaselayer

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Implementations

impl<A: 'static> dyn SimpleState<A>[src]

pub fn new(panel: Panel, inner: Box<dyn SimpleState<A>>) -> Box<dyn State<A>>[src]

Implementors

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