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UsdUINodeGraphNodeAPI Class Reference

This api helps storing information about nodes in node graphs. More...

#include <nodeGraphNodeAPI.h>

+ Inheritance diagram for UsdUINodeGraphNodeAPI:

Public Member Functions

 UsdUINodeGraphNodeAPI (const UsdPrim &prim=UsdPrim())
 Construct a UsdUINodeGraphNodeAPI on UsdPrim prim .
 
 UsdUINodeGraphNodeAPI (const UsdSchemaBase &schemaObj)
 Construct a UsdUINodeGraphNodeAPI on the prim held by schemaObj .
 
virtual USDUI_API ~UsdUINodeGraphNodeAPI ()
 Destructor.
 
USDUI_API UsdAttribute GetPosAttr () const
 Declared relative position to the parent in a node graph.
 
USDUI_API UsdAttribute CreatePosAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetPosAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDUI_API UsdAttribute GetStackingOrderAttr () const
 This optional value is a useful hint when an application cares about the visibility of a node and whether each node overlaps another.
 
USDUI_API UsdAttribute CreateStackingOrderAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetStackingOrderAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDUI_API UsdAttribute GetDisplayColorAttr () const
 This hint defines what tint the node should have in the node graph.
 
USDUI_API UsdAttribute CreateDisplayColorAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetDisplayColorAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDUI_API UsdAttribute GetIconAttr () const
 This points to an image that should be displayed on the node.
 
USDUI_API UsdAttribute CreateIconAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetIconAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDUI_API UsdAttribute GetExpansionStateAttr () const
 The current expansionState of the node in the ui.
 
USDUI_API UsdAttribute CreateExpansionStateAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetExpansionStateAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
USDUI_API UsdAttribute GetSizeAttr () const
 Optional size hint for a node in a node graph.
 
USDUI_API UsdAttribute CreateSizeAttr (VtValue const &defaultValue=VtValue(), bool writeSparsely=false) const
 See GetSizeAttr(), and also Create vs Get Property Methods for when to use Get vs Create.
 
- Public Member Functions inherited from UsdAPISchemaBase
 UsdAPISchemaBase (const UsdPrim &prim=UsdPrim())
 Construct a UsdAPISchemaBase on UsdPrim prim .
 
 UsdAPISchemaBase (const UsdSchemaBase &schemaObj)
 Construct a UsdAPISchemaBase on the prim held by schemaObj .
 
virtual USD_API ~UsdAPISchemaBase ()=0
 Destructor.
 
- Public Member Functions inherited from UsdSchemaBase
bool IsConcrete () const
 Returns whether or not this class corresponds to a concrete instantiable prim type in scene description.
 
bool IsTyped () const
 Returns whether or not this class inherits from UsdTyped.
 
bool IsAPISchema () const
 Returns whether this is an API schema or not.
 
bool IsAppliedAPISchema () const
 Returns whether this is an applied API schema or not.
 
bool IsMultipleApplyAPISchema () const
 Returns whether this is an applied API schema or not.
 
UsdSchemaKind GetSchemaKind () const
 Returns the kind of schema this class is.
 
USD_API UsdSchemaBase (const UsdPrim &prim=UsdPrim())
 Construct and store prim as the held prim.
 
USD_API UsdSchemaBase (const UsdSchemaBase &otherSchema)
 Construct and store for the same prim held by otherSchema.
 
virtual USD_API ~UsdSchemaBase ()
 Destructor.
 
UsdPrim GetPrim () const
 Return this schema object's held prim.
 
SdfPath GetPath () const
 Shorthand for GetPrim()->GetPath().
 
USD_API const UsdPrimDefinitionGetSchemaClassPrimDefinition () const
 Return the prim definition associated with this schema instance if one exists, otherwise return null.
 
USD_API operator bool () const
 Return true if this schema object is compatible with its held prim, false otherwise.
 

Static Public Member Functions

static USDUI_API const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 Return a vector of names of all pre-declared attributes for this schema class and all its ancestor classes.
 
static USDUI_API UsdUINodeGraphNodeAPI Get (const UsdStagePtr &stage, const SdfPath &path)
 Return a UsdUINodeGraphNodeAPI holding the prim adhering to this schema at path on stage.
 
static USDUI_API bool CanApply (const UsdPrim &prim, std::string *whyNot=nullptr)
 Returns true if this single-apply API schema can be applied to the given prim.
 
static USDUI_API UsdUINodeGraphNodeAPI Apply (const UsdPrim &prim)
 Applies this single-apply API schema to the given prim.
 
- Static Public Member Functions inherited from UsdAPISchemaBase
static USD_API const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 Return a vector of names of all pre-declared attributes for this schema class and all its ancestor classes.
 
- Static Public Member Functions inherited from UsdSchemaBase
static const TfTokenVectorGetSchemaAttributeNames (bool includeInherited=true)
 

Static Public Attributes

static const UsdSchemaKind schemaKind = UsdSchemaKind::SingleApplyAPI
 Compile time constant representing what kind of schema this class is.
 
- Static Public Attributes inherited from UsdAPISchemaBase
static const UsdSchemaKind schemaKind = UsdSchemaKind::AbstractBase
 Compile time constant representing what kind of schema this class is.
 
- Static Public Attributes inherited from UsdSchemaBase
static const UsdSchemaKind schemaKind = UsdSchemaKind::AbstractBase
 Compile time constant representing what kind of schema this class is.
 

Protected Member Functions

USDUI_API UsdSchemaKind _GetSchemaKind () const override
 Returns the kind of schema this class belongs to.
 
- Protected Member Functions inherited from UsdAPISchemaBase
USD_API UsdSchemaKind _GetSchemaKind () const override
 Returns the kind of schema this class belongs to.
 
 UsdAPISchemaBase (const UsdPrim &prim, const TfToken &instanceName)
 Construct a multiple-apply UsdAPISchemaBase on UsdPrim prim with the specified instanceName.
 
 UsdAPISchemaBase (const UsdSchemaBase &schemaObj, const TfToken &instanceName)
 Construct a multiple-apply UsdAPISchemaBase on the prim held by schemaObj with the given instanceName.
 
const TfToken_GetInstanceName () const
 Returns the instance name of the API schema object belonging to a multiple-apply API schema.
 
USD_API bool _IsCompatible () const override
 Check whether this APISchema object is valid for the currently held
prim.
 
- Protected Member Functions inherited from UsdSchemaBase
virtual UsdSchemaKind _GetSchemaType () const
 
const TfType_GetType () const
 
USD_API UsdAttribute _CreateAttr (TfToken const &attrName, SdfValueTypeName const &typeName, bool custom, SdfVariability variability, VtValue const &defaultValue, bool writeSparsely) const
 

Friends

class UsdSchemaRegistry
 

Additional Inherited Members

- Static Protected Member Functions inherited from UsdAPISchemaBase
static USD_API TfTokenVector _GetMultipleApplyInstanceNames (const UsdPrim &prim, const TfType &schemaType)
 Returns a vector of names of API schema objects belonging to a multiple-apply API schema applied to a given prim.
 

Detailed Description

This api helps storing information about nodes in node graphs.

For any described attribute Fallback Value or Allowed Values below that are text/tokens, the actual token is published and defined in UsdUITokens. So to set an attribute to the value "rightHanded", use UsdUITokens->rightHanded as the value.

Definition at line 64 of file nodeGraphNodeAPI.h.

Constructor & Destructor Documentation

◆ UsdUINodeGraphNodeAPI() [1/2]

UsdUINodeGraphNodeAPI ( const UsdPrim prim = UsdPrim())
inlineexplicit

Construct a UsdUINodeGraphNodeAPI on UsdPrim prim .

Equivalent to UsdUINodeGraphNodeAPI::Get(prim.GetStage(), prim.GetPath()) for a valid prim, but will not immediately throw an error for an invalid prim

Definition at line 76 of file nodeGraphNodeAPI.h.

◆ UsdUINodeGraphNodeAPI() [2/2]

UsdUINodeGraphNodeAPI ( const UsdSchemaBase schemaObj)
inlineexplicit

Construct a UsdUINodeGraphNodeAPI on the prim held by schemaObj .

Should be preferred over UsdUINodeGraphNodeAPI(schemaObj.GetPrim()), as it preserves SchemaBase state.

Definition at line 84 of file nodeGraphNodeAPI.h.

◆ ~UsdUINodeGraphNodeAPI()

virtual USDUI_API ~UsdUINodeGraphNodeAPI ( )
virtual

Destructor.

Member Function Documentation

◆ _GetSchemaKind()

USDUI_API UsdSchemaKind _GetSchemaKind ( ) const
overrideprotectedvirtual

Returns the kind of schema this class belongs to.

See also
UsdSchemaKind

Reimplemented from UsdAPISchemaBase.

◆ Apply()

static USDUI_API UsdUINodeGraphNodeAPI Apply ( const UsdPrim prim)
static

Applies this single-apply API schema to the given prim.

This information is stored by adding "NodeGraphNodeAPI" to the token-valued, listOp metadata apiSchemas on the prim.

Returns
A valid UsdUINodeGraphNodeAPI object is returned upon success. An invalid (or empty) UsdUINodeGraphNodeAPI object is returned upon failure. See UsdPrim::ApplyAPI() for conditions resulting in failure.
See also
UsdPrim::GetAppliedSchemas()
UsdPrim::HasAPI()
UsdPrim::CanApplyAPI()
UsdPrim::ApplyAPI()
UsdPrim::RemoveAPI()

◆ CanApply()

static USDUI_API bool CanApply ( const UsdPrim prim,
std::string *  whyNot = nullptr 
)
static

Returns true if this single-apply API schema can be applied to the given prim.

If this schema can not be a applied to the prim, this returns false and, if provided, populates whyNot with the reason it can not be applied.

Note that if CanApply returns false, that does not necessarily imply that calling Apply will fail. Callers are expected to call CanApply before calling Apply if they want to ensure that it is valid to apply a schema.

See also
UsdPrim::GetAppliedSchemas()
UsdPrim::HasAPI()
UsdPrim::CanApplyAPI()
UsdPrim::ApplyAPI()
UsdPrim::RemoveAPI()

◆ CreateDisplayColorAttr()

USDUI_API UsdAttribute CreateDisplayColorAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetDisplayColorAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateExpansionStateAttr()

USDUI_API UsdAttribute CreateExpansionStateAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetExpansionStateAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateIconAttr()

USDUI_API UsdAttribute CreateIconAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetIconAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreatePosAttr()

USDUI_API UsdAttribute CreatePosAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetPosAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateSizeAttr()

USDUI_API UsdAttribute CreateSizeAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetSizeAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ CreateStackingOrderAttr()

USDUI_API UsdAttribute CreateStackingOrderAttr ( VtValue const &  defaultValue = VtValue(),
bool  writeSparsely = false 
) const

See GetStackingOrderAttr(), and also Create vs Get Property Methods for when to use Get vs Create.

If specified, author defaultValue as the attribute's default, sparsely (when it makes sense to do so) if writeSparsely is true - the default for writeSparsely is false.

◆ Get()

static USDUI_API UsdUINodeGraphNodeAPI Get ( const UsdStagePtr &  stage,
const SdfPath path 
)
static

Return a UsdUINodeGraphNodeAPI holding the prim adhering to this schema at path on stage.

If no prim exists at path on stage, or if the prim at that path does not adhere to this schema, return an invalid schema object. This is shorthand for the following:

UsdUINodeGraphNodeAPI(stage->GetPrimAtPath(path));
This api helps storing information about nodes in node graphs.

◆ GetDisplayColorAttr()

USDUI_API UsdAttribute GetDisplayColorAttr ( ) const

This hint defines what tint the node should have in the node graph.

Declaration uniform color3f ui:nodegraph:node:displayColor
C++ Type GfVec3f
Usd Type SdfValueTypeNames->Color3f
Variability SdfVariabilityUniform

◆ GetExpansionStateAttr()

USDUI_API UsdAttribute GetExpansionStateAttr ( ) const

The current expansionState of the node in the ui.

'open' = fully expanded 'closed' = fully collapsed 'minimized' = should take the least space possible

Declaration uniform token ui:nodegraph:node:expansionState
C++ Type TfToken
Usd Type SdfValueTypeNames->Token
Variability SdfVariabilityUniform
Allowed Values open, closed, minimized

◆ GetIconAttr()

USDUI_API UsdAttribute GetIconAttr ( ) const

This points to an image that should be displayed on the node.

It is intended to be useful for summary visual classification of nodes, rather than a thumbnail preview of the computed result of the node in some computational system.

Declaration uniform asset ui:nodegraph:node:icon
C++ Type SdfAssetPath
Usd Type SdfValueTypeNames->Asset
Variability SdfVariabilityUniform

◆ GetPosAttr()

USDUI_API UsdAttribute GetPosAttr ( ) const

Declared relative position to the parent in a node graph.

X is the horizontal position. Y is the vertical position. Higher numbers correspond to lower positions (coordinates are Qt style, not cartesian).

These positions are not explicitly meant in pixel space, but rather assume that the size of a node is approximately 1.0x1.0. Where size-x is the node width and size-y height of the node. Depending on graph UI implementation, the size of a node may vary in each direction.

Example: If a node's width is 300 and it is position is at 1000, we store for x-position: 1000 * (1.0/300)

Declaration uniform float2 ui:nodegraph:node:pos
C++ Type GfVec2f
Usd Type SdfValueTypeNames->Float2
Variability SdfVariabilityUniform

◆ GetSchemaAttributeNames()

static USDUI_API const TfTokenVector & GetSchemaAttributeNames ( bool  includeInherited = true)
static

Return a vector of names of all pre-declared attributes for this schema class and all its ancestor classes.

Does not include attributes that may be authored by custom/extended methods of the schemas involved.

◆ GetSizeAttr()

USDUI_API UsdAttribute GetSizeAttr ( ) const

Optional size hint for a node in a node graph.

X is the width. Y is the height.

This value is optional, because node size is often determined based on the number of in- and outputs of a node.

Declaration uniform float2 ui:nodegraph:node:size
C++ Type GfVec2f
Usd Type SdfValueTypeNames->Float2
Variability SdfVariabilityUniform

◆ GetStackingOrderAttr()

USDUI_API UsdAttribute GetStackingOrderAttr ( ) const

This optional value is a useful hint when an application cares about the visibility of a node and whether each node overlaps another.

Nodes with lower stacking order values are meant to be drawn below higher ones. Negative values are meant as background. Positive values are meant as foreground. Undefined values should be treated as 0.

There are no set limits in these values.

Declaration uniform int ui:nodegraph:node:stackingOrder
C++ Type int
Usd Type SdfValueTypeNames->Int
Variability SdfVariabilityUniform

Friends And Related Function Documentation

◆ UsdSchemaRegistry

friend class UsdSchemaRegistry
friend

Definition at line 162 of file nodeGraphNodeAPI.h.

Member Data Documentation

◆ schemaKind

const UsdSchemaKind schemaKind = UsdSchemaKind::SingleApplyAPI
static

Compile time constant representing what kind of schema this class is.

See also
UsdSchemaKind

Definition at line 70 of file nodeGraphNodeAPI.h.


The documentation for this class was generated from the following file: