Struct PrefabTemplateNode

pub struct PrefabTemplateNode(/* private fields */);

A prefab template node contains information that is required to create node instances: the metaclass of the node, the (initial) property values of the node, information about the bindings and node components of the node, and the list of of child nodes.

Typically prefab templates nodes are defined in Kanzi Studio and loaded from a kzb file as PrefabTemplate resources. A Prefab template contains a tree of prefab template nodes and can be used to instantiate a tree of nodes.

Note that nodes can be created also directly by using the create function in each Node class. You don’t necessarily need to use PrefabTemplate or PrefabTemplateNode instances.

A prefab template node can represent either a normal node with a metaclass, or a placeholder that replaces itself with the root of another prefab template when instantiated. Prefab template nodes and their children should always form a simple tree structure. Creating a cycle with prefab placeholders is not allowed.

See: PrefabTemplate

Implementations

impl PrefabTemplateNode

pub fn create_placeholder( domain: &Domain, instantiated_prefab: PrefabTemplate, name: impl AsRef<KanziStr>, ) -> Result<PrefabTemplateNode, Error>

Creates a prefab template node that can be instantiated to create an instance of another prefab template.

Arguments

• domain - The domain to use.
• instantiatedPrefab - A reference to another prefab that will be instantiated in place of this prefab template node.
• name - The name of the placeholder node. Overrides the name of the root node of the referenced prefab template.

Methods from Deref<Target = Resource>

pub fn get_name(&self) -> Result<KanziString, Error>

Gets the resource name.

pub fn get_url(&self) -> Result<KanziString, Error>

Gets the resource URL. Note that the URL is not necessarily in URL form if resource has been just created.

Returns

URL string.

pub fn set_keep_alive(&self, keep_alive: bool) -> Result<(), Error>

Sets the keep alive flag. Can be set only before the resource is registered to the resource manager. Normally set by loadFromKZB.

Arguments

• keep_alive - Value for the keep alive flag.

Methods from Deref<Target = Object>

pub fn as_ptr(&self) -> *mut ObjectWrapper

pub fn as_wrapper(&self) -> &ObjectWrapper

pub fn as_object(&self) -> &Object

Represents any type inheriting from Object as &Object. This is useful for comparisions when PartialEq traits failed to compare objects of different types.

let child = screen.get_child(0)?;
let parent = child.get_parent()?.into_error(ErrorKind::ObjectNotFound)?;
// assert_eq!(screen, parent); // <- Fails to compile!
assert_eq!(screen.as_object(), parent.as_object());

pub fn get_native(&self) -> Result<NonNull<c_void>, Error>

Gets a pointer to the backing C++ instance.

pub fn is_stale(&self) -> bool

Checks whether the weak reference has expired.

pub fn get_property<T>( &self, property_type: &PropertyType<T>, ) -> Result<<T as VariantConstraint>::RetArg, Error>

where T: PropertyTypeConstraint,

Returns the current value of a property disregarding modifiers.

Base value is affected by the following inputs where the highest entry in the list determines the base value:

1. Local value set with setProperty or loaded from kzb
2. Value set by a style affecting the property.
3. Value defined by class metadata.

Modifiers are not applied, the highest-priority base value is returned.

If no inputs to the property value can be established the system returns the value default value from property type metadata.

Arguments

• property_type - The property type identifying the property to retrieve.

Returns

The evaluated property value.

pub fn get_optional_property<T>( &self, property_type: &PropertyType<T>, ) -> Result<Option<<T as VariantConstraint>::RetArg>, Error>

where T: PropertyTypeConstraint,

Returns the current value of a property disregarding modifiers, but does not default to the value in property metadata if there are no inputs to the property value.

If there is no value sources, None is returned.

If no inputs to the property value can be established the system returns the value default value from property type metadata.

Arguments

• property_type - The property type identifying the property to retrieve.

Returns

The evaluated property value.

pub fn set_property<T>( &self, property_type: &PropertyType<T>, value: <T as VariantConstraint>::DataArg<'_>, ) -> Result<(), Error>

where T: PropertyTypeConstraint,

Sets the local value of a property type.

pub fn has_value<T>( &self, property_type: &PropertyType<T>, ) -> Result<bool, Error>

where T: PropertyTypeConstraint,

Evaluates whether there are any inputs into the property value. Both value sources and modifiers are taken into account.

Returns

Returns true if there are inputs into the property value, false otherwise.

pub fn remove_local_value<T>( &self, property_type: &PropertyType<T>, ) -> Result<(), Error>

where T: PropertyTypeConstraint,

Removes the local value associated with the property.

pub fn get_metaclass(&self) -> Result<Metaclass, Error>

Returns the metaclass of the dynamic type of the object.

pub fn get_domain(&self) -> Result<Domain, Error>

Returns the domain the object belongs to.

pub fn set_flag_keep_during_patching<T>( &self, property_type: &PropertyType<T>, ) -> Result<(), Error>

where T: PropertyTypeConstraint,

Sets the flag to indicate that the property was loaded from KZB.

pub fn debug_string(&self) -> Result<String, Error>

Builds a string representation of the object intended for debugging purposes.

Trait Implementations

impl Clone for PrefabTemplateNode

fn clone(&self) -> PrefabTemplateNode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PrefabTemplateNode

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

Formats the value using the given formatter.

impl Deref for PrefabTemplateNode

type Target = Resource

The resulting type after dereferencing.

fn deref(&self) -> &<PrefabTemplateNode as Deref>::Target

Dereferences the value.

impl Inheritable for PrefabTemplateNode

unsafe fn downcast_unchecked<T>(self) -> T

where T: Inherits<Self>,

Downcast the object to a more specific type.

unsafe fn downcast_unchecked_ref<T>(&self) -> &T

where T: Inherits<Self>,

Downcast the object reference to a more specific type.

impl Inherits<Object> for PrefabTemplateNode

fn upcast(self) -> Base

fn upcast_ref(&self) -> &Base

impl Inherits<Resource> for PrefabTemplateNode

fn upcast(self) -> Base

fn upcast_ref(&self) -> &Base

impl MetaclassConstraint for PrefabTemplateNode

fn get_static_metaclass() -> &'static Metaclass

Gets metaclass associated with a given type.

impl ObjectConstraint for PrefabTemplateNode

fn downcast<T>(self) -> Result<Option<T>, Error>

where T: MetaInherits<Self>,

Casts metaclass to a more specific type by value.

fn downcast_ref<T>(&self) -> Result<Option<&T>, Error>

where T: MetaInherits<Self>,

Casts metaclass to a more specific type by reference.

fn is_a<T>(&self) -> Result<bool, Error>

where T: MetaInherits<Self>,

Determines whether the class this metaclass describes derives from a class described by specified metaclass.

fn downgrade(self) -> Weak<Self>

fn downgrade_ref(&self) -> Weak<Self>

fn lock(self) -> ThreadObject<Self>

fn lock_ref(&self) -> ThreadObject<Self>

impl<T> PartialEq<T> for PrefabTemplateNode

where T: ObjectConstraint,

fn eq(&self, rhs: &T) -> 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<T> PartialEq<Weak<T>> for PrefabTemplateNode

where T: ObjectConstraint,

fn eq(&self, rhs: &Weak<T>) -> 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 Eq for PrefabTemplateNode