Struct PickingBehavior

pub struct PickingBehavior {
    pub should_block_lower: bool,
    pub is_hoverable: bool,
}

An optional component that overrides default picking behavior for an entity, allowing you to make an entity non-hoverable, or allow items below it to be hovered. See the documentation on the fields for more details.

Fields

should_block_lower: bool

Should this entity block entities below it from being picked?

This is useful if you want picking to continue hitting entities below this one. Normally, only the topmost entity under a pointer can be hovered, but this setting allows the pointer to hover multiple entities, from nearest to farthest, stopping as soon as it hits an entity that blocks lower entities.

Note that the word “lower” here refers to entities that have been reported as hit by any picking backend, but are at a lower depth than the current one. This is different from the concept of event bubbling, as it works irrespective of the entity hierarchy.

For example, if a pointer is over a UI element, as well as a 3d mesh, backends will report hits for both of these entities. Additionally, the hits will be sorted by the camera order, so if the UI is drawing on top of the 3d mesh, the UI will be “above” the mesh. When focus is computed, the UI element will be checked first to see if it this field is set to block lower entities. If it does (default), the focus system will stop there, and only the UI element will be marked as hovered. However, if this field is set to false, both the UI element and the mesh will be marked as hovered.

Entities without the PickingBehavior component will block by default.

is_hoverable: bool

If this is set to false and should_block_lower is set to true, this entity will block lower entities from being interacted and at the same time will itself not emit any events.

Note that the word “lower” here refers to entities that have been reported as hit by any picking backend, but are at a lower depth than the current one. This is different from the concept of event bubbling, as it works irrespective of the entity hierarchy.

For example, if a pointer is over a UI element, and this field is set to false, it will not be marked as hovered, and consequently will not emit events nor will any picking components mark it as hovered. This can be combined with the other field Self::should_block_lower, which is orthogonal to this one.

Entities without the PickingBehavior component are hoverable by default.

Implementations

impl PickingBehavior

pub const IGNORE: PickingBehavior

This entity will not block entities beneath it, nor will it emit events.

If a backend reports this entity as being hit, the picking plugin will completely ignore it.

Trait Implementations

impl Clone for PickingBehavior

fn clone(&self) -> PickingBehavior

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Component for PickingBehavior

where PickingBehavior: Send + Sync + 'static,

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

A constant indicating the storage type used for this component.

fn register_required_components( requiree: ComponentId, components: &mut Components, storages: &mut Storages, required_components: &mut RequiredComponents, inheritance_depth: u16, )

Registers required components.

fn register_component_hooks(hooks: &mut ComponentHooks)

Called when registering this component, allowing mutable access to its ComponentHooks.

impl Debug for PickingBehavior

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

Formats the value using the given formatter.

impl Default for PickingBehavior

fn default() -> PickingBehavior

Returns the “default value” for a type.

impl FromReflect for PickingBehavior

where PickingBehavior: Any + Send + Sync, bool: FromReflect + TypePath + MaybeTyped + RegisterForReflection,

fn from_reflect( reflect: &(dyn PartialReflect + 'static), ) -> Option<PickingBehavior>

Constructs a concrete instance of Self from a reflected value.

fn take_from_reflect( reflect: Box<dyn PartialReflect>, ) -> Result<Self, Box<dyn PartialReflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails.

impl GetTypeRegistration for PickingBehavior

where PickingBehavior: Any + Send + Sync, bool: FromReflect + TypePath + MaybeTyped + RegisterForReflection,

fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.

fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type.

impl PartialEq for PickingBehavior

fn eq(&self, other: &PickingBehavior) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialReflect for PickingBehavior

where PickingBehavior: Any + Send + Sync, bool: FromReflect + TypePath + MaybeTyped + RegisterForReflection,

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value.

fn clone_value(&self) -> Box<dyn PartialReflect>

Clones the value as a Reflect trait object.

fn try_apply( &mut self, value: &(dyn PartialReflect + 'static), ) -> Result<(), ApplyError>

Tries to apply a reflected value to this value.

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<PickingBehavior>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn try_into_reflect( self: Box<PickingBehavior>, ) -> Result<Box<dyn Reflect>, Box<dyn PartialReflect>>

Attempts to cast this type to a boxed, fully-reflected value.

fn try_as_reflect(&self) -> Option<&(dyn Reflect + 'static)>

Attempts to cast this type to a fully-reflected value.

fn try_as_reflect_mut(&mut self) -> Option<&mut (dyn Reflect + 'static)>

Attempts to cast this type to a mutable, fully-reflected value.

fn into_partial_reflect(self: Box<PickingBehavior>) -> Box<dyn PartialReflect>

Casts this type to a boxed, reflected value.

fn as_partial_reflect(&self) -> &(dyn PartialReflect + 'static)

Casts this type to a reflected value.

fn as_partial_reflect_mut(&mut self) -> &mut (dyn PartialReflect + 'static)

Casts this type to a mutable, reflected value.

fn reflect_partial_eq( &self, value: &(dyn PartialReflect + 'static), ) -> Option<bool>

Returns a “partial equality” comparison result.

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

Debug formatter for the value.

fn apply(&mut self, value: &(dyn PartialReflect + 'static))

Applies a reflected value to this value.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value.

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl Reflect for PickingBehavior

where PickingBehavior: Any + Send + Sync, bool: FromReflect + TypePath + MaybeTyped + RegisterForReflection,

fn into_any(self: Box<PickingBehavior>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<PickingBehavior>) -> Box<dyn Reflect>

Casts this type to a boxed, fully-reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a fully-reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable, fully-reflected value.

fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value.

impl Struct for PickingBehavior

where PickingBehavior: Any + Send + Sync, bool: FromReflect + TypePath + MaybeTyped + RegisterForReflection,

fn field(&self, name: &str) -> Option<&(dyn PartialReflect + 'static)>

Returns a reference to the value of the field named name as a &dyn PartialReflect.

fn field_mut( &mut self, name: &str, ) -> Option<&mut (dyn PartialReflect + 'static)>

Returns a mutable reference to the value of the field named name as a &mut dyn PartialReflect.

fn field_at(&self, index: usize) -> Option<&(dyn PartialReflect + 'static)>

Returns a reference to the value of the field with index index as a &dyn PartialReflect.

fn field_at_mut( &mut self, index: usize, ) -> Option<&mut (dyn PartialReflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn PartialReflect.

fn name_at(&self, index: usize) -> Option<&str>

Returns the name of the field with index index.

fn field_len(&self) -> usize

Returns the number of fields in the struct.

fn iter_fields(&self) -> FieldIter<'_>

Returns an iterator over the values of the reflectable fields for this struct.

fn clone_dynamic(&self) -> DynamicStruct

Clones the struct into a DynamicStruct.

fn get_represented_struct_info(&self) -> Option<&'static StructInfo>

Will return None if TypeInfo is not available.

impl TypePath for PickingBehavior

where PickingBehavior: Any + Send + Sync,

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type.

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type.

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous.

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous.

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous.

impl Typed for PickingBehavior

where PickingBehavior: Any + Send + Sync, bool: FromReflect + TypePath + MaybeTyped + RegisterForReflection,

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

impl Eq for PickingBehavior

impl StructuralPartialEq for PickingBehavior