Struct Slider 

pub struct Slider {
    pub track_click: TrackClick,
}

A headless slider widget, which can be used to build custom sliders. Sliders have a value (represented by the SliderValue component) and a range (represented by SliderRange). An optional step size can be specified via SliderStep, and you can control the rounding during dragging with SliderPrecision.

You can also control the slider remotely by triggering a SetSliderValue event on it. This can be useful in a console environment for controlling the value gamepad inputs.

The presence of the on_change property controls whether the slider uses internal or external state management. If the on_change property is None, then the slider updates its own state automatically. Otherwise, the on_change property contains the id of a one-shot system which is passed the new slider value. In this case, the slider value is not modified, it is the responsibility of the callback to trigger whatever data-binding mechanism is used to update the slider’s value.

Typically a slider will contain entities representing the “track” and “thumb” elements. The core slider makes no assumptions about the hierarchical structure of these elements, but expects that the thumb will be marked with a SliderThumb component.

The core slider does not modify the visible position of the thumb: that is the responsibility of the stylist. This can be done either in percent or pixel units as desired. To prevent overhang at the ends of the slider, the positioning should take into account the thumb width, by reducing the amount of travel. So for example, in a slider 100px wide, with a thumb that is 10px, the amount of travel is 90px. The core slider’s calculations for clicking and dragging assume this is the case, and will reduce the travel by the measured size of the thumb entity, which allows the movement of the thumb to be perfectly synchronized with the movement of the mouse.

In cases where overhang is desired for artistic reasons, the thumb may have additional decorative child elements, absolutely positioned, which don’t affect the size measurement.

Fields

track_click: TrackClick

Set the track-clicking behavior for this slider.

Trait Implementations

impl Component for Slider

where Self: Send + Sync + 'static,

Required Components: AccessibilityNode, CoreSliderDragState, SliderValue, SliderRange, SliderStep.

A component’s Required Components are inserted whenever it is inserted. Note that this will also insert the required components of the required components, recursively, in depth-first order.

const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::Table

A constant indicating the storage type used for this component.

type Mutability = Mutable

A marker type to assist Bevy with determining if this component is mutable, or immutable. Mutable components will have Component<Mutability = Mutable>, while immutable components will instead have Component<Mutability = Immutable>.

fn register_required_components( _requiree: ComponentId, required_components: &mut RequiredComponentsRegistrator<'_, '_>, )

Registers required components.

fn clone_behavior() -> ComponentCloneBehavior

Called when registering this component, allowing to override clone function (or disable cloning altogether) for this component.

fn relationship_accessor() -> Option<ComponentRelationshipAccessor<Self>>

Returns ComponentRelationshipAccessor required for working with relationships in dynamic contexts.

fn on_add() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_add ComponentHook for this Component if one is defined.

fn on_insert() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_insert ComponentHook for this Component if one is defined.

fn on_replace() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_replace ComponentHook for this Component if one is defined.

fn on_remove() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_remove ComponentHook for this Component if one is defined.

fn on_despawn() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_despawn ComponentHook for this Component if one is defined.

fn map_entities<E>(_this: &mut Self, _mapper: &mut E)

where E: EntityMapper,

Maps the entities on this component using the given EntityMapper. This is used to remap entities in contexts like scenes and entity cloning. When deriving Component, this is populated by annotating fields containing entities with #[entities]

impl Debug for Slider

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

Formats the value using the given formatter.

impl Default for Slider

fn default() -> Slider

Returns the “default value” for a type.