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Recorder

druid::tests::helpers

Struct Recorder 

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pub struct Recorder<W> { /* private fields */ }
Available on non-WebAssembly only.
Expand description

A widget that records each time one of its methods is called.

Make one like this:

use druid::tests::helpers::{Recording, Record, TestWidgetExt};
use druid::tests::harness::Harness;
let recording = Recording::default();
let widget = Label::new("Hello").padding(4.0).record(&recording);

Harness::create_simple((), widget, |harness| {
    harness.send_initial_events();
    assert!(matches!(recording.next(), Record::L(LifeCycle::WidgetAdded)));
})

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impl<T: Data, W: Widget<T>> Widget<T> for Recorder<W>

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fn event( &mut self, ctx: &mut EventCtx<'_, '_>, event: &Event, data: &mut T, env: &Env, )

Handle an event. Read more
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fn lifecycle( &mut self, ctx: &mut LifeCycleCtx<'_, '_>, event: &LifeCycle, data: &T, env: &Env, )

Handle a life cycle notification. Read more
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fn update( &mut self, ctx: &mut UpdateCtx<'_, '_>, old_data: &T, data: &T, env: &Env, )

Update the widget’s appearance in response to a change in the app’s Data or Env. Read more
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fn layout( &mut self, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env, ) -> Size

Compute layout. Read more
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fn paint(&mut self, ctx: &mut PaintCtx<'_, '_, '_>, data: &T, env: &Env)

Paint the widget appearance. Read more
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fn compute_max_intrinsic( &mut self, axis: Axis, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env, ) -> f64

Computes max intrinsic/preferred dimension of a widget on the provided axis. Read more

Auto Trait Implementations§

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impl<W> Freeze for Recorder<W>
where W: Freeze,

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impl<W> !RefUnwindSafe for Recorder<W>

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impl<W> !Send for Recorder<W>

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impl<W> !Sync for Recorder<W>

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impl<W> Unpin for Recorder<W>
where W: Unpin,

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impl<W> !UnwindSafe for Recorder<W>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> RoundFrom<T> for T

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fn round_from(x: T) -> T

Performs the conversion.
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impl<T, U> RoundInto<U> for T
where U: RoundFrom<T>,

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fn round_into(self) -> U

Performs the conversion.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, W> TestWidgetExt<T> for W
where T: Data, W: Widget<T> + 'static,

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fn record(self, recording: &Recording) -> Recorder<Self>

Available on non-WebAssembly only.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T, W> WidgetExt<T> for W
where T: Data, W: Widget<T> + 'static,

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fn padding(self, insets: impl Into<KeyOrValue<Insets>>) -> Padding<T, Self>

Wrap this widget in a Padding widget with the given Insets. Read more
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fn center(self) -> Align<T>

Wrap this widget in an Align widget, configured to center it.
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fn align_left(self) -> Align<T>

Wrap this widget in an Align widget, configured to align left.
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fn align_right(self) -> Align<T>

Wrap this widget in an Align widget, configured to align right.
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fn align_vertical(self, align: UnitPoint) -> Align<T>

Wrap this widget in an Align widget, configured to align vertically.
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fn align_horizontal(self, align: UnitPoint) -> Align<T>

Wrap this widget in an Align widget, configured to align horizontally.
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fn fix_width(self, width: impl Into<KeyOrValue<f64>>) -> SizedBox<T>

Wrap this widget in a SizedBox with an explicit width.
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fn fix_height(self, height: impl Into<KeyOrValue<f64>>) -> SizedBox<T>

Wrap this widget in a SizedBox with an explicit height.
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fn fix_size( self, width: impl Into<KeyOrValue<f64>>, height: impl Into<KeyOrValue<f64>>, ) -> SizedBox<T>

Wrap this widget in an SizedBox with an explicit width and height
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fn expand(self) -> SizedBox<T>

Wrap this widget in a SizedBox with an infinite width and height. Read more
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fn expand_width(self) -> SizedBox<T>

Wrap this widget in a SizedBox with an infinite width. Read more
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fn expand_height(self) -> SizedBox<T>

Wrap this widget in a SizedBox with an infinite width. Read more
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fn background(self, brush: impl Into<BackgroundBrush<T>>) -> Container<T>

Wrap this widget in a Container with the provided background brush. Read more
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fn foreground(self, brush: impl Into<BackgroundBrush<T>>) -> Container<T>

Wrap this widget in a Container with the provided foreground brush. Read more
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fn border( self, color: impl Into<KeyOrValue<Color>>, width: impl Into<KeyOrValue<f64>>, ) -> Container<T>

Wrap this widget in a Container with the given border. Read more
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fn env_scope(self, f: impl Fn(&mut Env, &T) + 'static) -> EnvScope<T, Self>

Wrap this widget in a EnvScope widget, modifying the parent Env with the provided closure.
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fn controller<C: Controller<T, Self>>( self, controller: C, ) -> ControllerHost<Self, C>

Wrap this widget with the provided Controller.
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fn on_added( self, f: impl Fn(&mut Self, &mut LifeCycleCtx<'_, '_>, &T, &Env) + 'static, ) -> ControllerHost<Self, Added<T, Self>>

Provide a closure that will be called when this widget is added to the widget tree. Read more
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fn on_click( self, f: impl Fn(&mut EventCtx<'_, '_>, &mut T, &Env) + 'static, ) -> ControllerHost<Self, Click<T>>

Control the events of this widget with a Click widget. The closure provided will be called when the widget is clicked with the left mouse button. Read more
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fn debug_paint_layout(self) -> EnvScope<T, Self>

Draw the layout Rects of this widget and its children.
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fn debug_widget_id(self) -> EnvScope<T, Self>

Display the WidgetIds for this widget and its children, when hot. Read more
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fn debug_invalidation(self) -> DebugInvalidation<T, Self>

Draw a color-changing rectangle over this widget, allowing you to see the invalidation regions.
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fn debug_widget(self) -> EnvScope<T, Self>

Set the DEBUG_WIDGET env variable for this widget (and its descendants). Read more
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fn lens<S: Data, L: Lens<S, T>>(self, lens: L) -> LensWrap<S, T, L, Self>

Wrap this widget in a LensWrap widget for the provided Lens.
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fn with_id(self, id: WidgetId) -> IdentityWrapper<Self>

Assign the widget a specific WidgetId. Read more
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fn boxed(self) -> Box<dyn Widget<T>>

Wrap this widget in a Box.
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fn scroll(self) -> Scroll<T, Self>

Wrap this widget in a Scroll widget.
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fn disabled_if( self, disabled_if: impl Fn(&T, &Env) -> bool + 'static, ) -> DisabledIf<T, Self>

Wrap this widget in a DisabledIf widget. Read more
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more