ViewState Class

The front-end state of a ViewDefinition element. A ViewState is typically associated with a Viewport to display the contents of the view on the screen. A ViewState being displayed by a Viewport is considered to be "attached" to that viewport; a "detached" viewport is not being displayed by any viewport. Because the Viewport modifies the state of its attached ViewState, a ViewState can only be attached to one Viewport at a time. Technically, two Viewports can display two different ViewStates that both use the same DisplayStyleState, but this is discouraged - changes made to the style by one Viewport will affect the contents of the other Viewport. *

@see Views

Extends

• ElementState

Extended by

• ViewState3d
• ViewState2d

Methods

Name	Description
_updateMaxGlobalScopeFactor(): void Protected
adjustAspectRatio(aspect: number): void	Adjust the aspect ratio of this ViewState so it matches the supplied value.
allow3dManipulations(): boolean Abstract	Returns true if ViewTools are allowed to operate in three dimensions on this view.
applyPose(props: ViewPose): this Abstract	Apply a pose to this view to change the viewed volume.
attachToViewport(_args: Viewport): void	Invoked when this view becomes the view displayed by the specified Viewport.
calculateFocusCorners(): Point3d[]
calculateFrustum(result?: Frustum): undefined | Frustum	Calculate the world coordinate Frustum from the parameters of this ViewState.
computeDisplayTransform(args: ComputeDisplayTransformArgs): undefined | Transform	Compute the transform applied to a model or element at display time, if any.
computeFitRange(): Range3d Abstract	Compute a range in CoordSystem.World coordinates that tightly encloses the contents of this view.
detachFromViewport(): void	Invoked when this view, previously attached to the specified Viewport via attachToViewport, is no longer the view displayed by that Viewport.
equals(other: this): boolean	Determine whether this ViewState exactly matches another.
forEachModel(func: (model: GeometricModelState) => void): void Abstract	Execute a function on each viewed model
forEachTileTreeRef(func: (treeRef: TileTreeReference) => void): void	Execute a function against each TileTreeReference associated with this view.
getAspectRatio(): number	Get the aspect ratio (width/height) of this view
getAspectRatioSkew(): number	Get the aspect ratio skew (x/y, usually 1.0) that is used to exaggerate the y axis of the view.
getAuxiliaryCoordinateSystemId(): string	Get the Id of the auxiliary coordinate system for this ViewState
getCenter(result?: Point3d): Point3d	Get the point at the geometric center of the view.
getExtents(): Vector3d Abstract	Get the extents of this view in CoordSystem.World coordinates.
getGlobeRotation(): undefined | Matrix3d	If the view is not of the project as determined by getIsViewingProject then return
getGridOrientation(): GridOrientationType	Get the grid settings for this view
getGridSettings(vp: Viewport, origin: Point3d, rMatrix: Matrix3d, orientation: GridOrientationType): void	Populate the given origin and rotation with information from the grid settings from the grid orientation.
getGridSpacing(): Readonly<WritableXAndY>
getGridsPerRef(): number
getIsViewingProject(): boolean	Return true if the view is looking at the current iModel project extents or
getModelAppearanceOverride(id: string): undefined | FeatureAppearance	Query the symbology overrides applied to a model when rendered using this ViewState.
getOrigin(): Point3d Abstract	Get the origin of this view in CoordSystem.World coordinates.
getRotation(): Matrix3d Abstract	Get the 3x3 ortho-normal Matrix3d for this view.
getSubCategoryOverride(id: string): undefined | SubCategoryOverride	Query the symbology overrides applied to geometry belonging to a specific subcategory when rendered using this ViewState.
getTargetPoint(result?: Point3d): Point3d	Get the target point of the view.
getUpVector(point: Point3d): Vector3d	Compute the vector in the "up" direction of a specific point in world space.
getViewClip(): undefined | ClipVector	Get the clipping volume for this view, if defined
getViewedExtents(): Range3d Abstract	Get the extents of this view in CoordSystem.World coordinates.
getXVector(result?: Vector3d): Vector3d	Get the unit vector that points in the view X (left-to-right) direction.
getYVector(result?: Vector3d): Vector3d	Get the unit vector that points in the view Y (bottom-to-top) direction.
getZVector(result?: Vector3d): Vector3d	Get the unit vector that points in the view Z (front-to-back) direction.
hasSameCoordinates(other: ViewState): boolean	Determine whether this ViewState has the same coordinate system as another one.
is2d(): this is ViewState2d	Returns true if this ViewState is-a ViewState2d
is3d(): this is ViewState3d Abstract	Returns true if this ViewState is-a ViewState3d
isDrawingView(): this is DrawingViewState Abstract	Returns true if this ViewState is-a DrawingViewState
isSheetView(): this is SheetViewState	Returns true if this ViewState is-a SheetViewState
isSpatialView(): this is SpatialViewState Abstract	Returns true if this ViewState is-a SpatialViewState
load(): Promise<void>	Asynchronously load any required data for this ViewState from the backend.
lookAtViewAlignedVolume(volume: Range3d, aspect?: number, options?: MarginOptions & OnViewExtentsError): void	Look at a volume of space defined by a range in view local coordinates, keeping its current rotation.
lookAtVolume(volume: Readonly<WritableLowAndHighXYZ> | Readonly<WritableLowAndHighXY>, aspect?: number, options?: MarginOptions & OnViewExtentsError): void	Change the volume that this view displays, keeping its current rotation.
postload(hydrateResponse: HydrateViewStateResponseProps): Promise<void> Protected
preload(hydrateRequest: HydrateViewStateRequestProps): void Protected	Populates the hydrateRequest object stored on the ViewState with:
resetExtentLimits(): void	Resets the largest and smallest values allowed for the extents of this ViewState to their default values.
savePose(): ViewPose Abstract	Capture a copy of this view's viewed volume.
setAspectRatioSkew(val: number): void	Set the aspect ratio skew (x/y) for this view.
setAuxiliaryCoordinateSystem(acs?: AuxCoordSystemState): void	Set or clear the AuxiliaryCoordinateSystem for this view.
setCategorySelector(categories: CategorySelectorState): void	Set the CategorySelector for this view.
setCenter(center: Point3d): void	set the center of this view to a new position.
setDisplayStyle(style: DisplayStyleState): void
setExtents(viewDelta: Vector3d): void Abstract	Set the extents of this view in CoordSystem.World coordinates.
setGridSettings(orientation: GridOrientationType, spacing: Point2d, gridsPerRef: number): void	Set the grid settings for this view
setOrigin(viewOrg: Readonly<WritableXYAndZ>): void Abstract	Set the origin of this view in CoordSystem.World coordinates.
setRotation(viewRot: Matrix3d): void Abstract	Change the rotation of the view.
setRotationAboutPoint(rotation: Matrix3d, point?: Point3d): void	Set the rotation of this ViewState to the supplied rotation, by rotating it about a point.
setStandardGlobalRotation(id: StandardViewId): void	Orient this view to one of the StandardView rotations, if the the view is not viewing the project then the
setStandardRotation(id: StandardViewId): void	Orient this view to one of the StandardView rotations.
setupFromFrustum(inFrustum: Frustum, opts?: OnViewExtentsError): ViewStatus	Initialize the origin, extents, and rotation from an existing Frustum
setViewClip(clip?: ClipVector): void	Set or clear the clipping volume for this view.
toJSON(): ViewDefinitionProps	Convert to JSON representation.
toProps(): ViewStateProps	Serialize this ViewState as a set of properties that can be used to recreate it via createFromProps.
viewsCategory(id: string): boolean	Determine whether the specified Category is displayed in this view
viewsModel(modelId: string): boolean Abstract	Returns true if this view displays the contents of a Model specified by Id.
createFromProps(_props: ViewStateProps, _iModel: IModelConnection): undefined | ViewState Static	Create a new ViewState object from a set of properties.

Inherited methods

Name	Inherited from	Description
clone(iModel?: IModelConnection): this Inherited	ElementState	Make an independent copy of this EntityState

Properties

Name	Type	Description
analysisStyle Accessor ReadOnly	undefined | AnalysisStyle	See DisplayStyleSettings.analysisStyle.
areAllTileTreesLoaded Accessor ReadOnly	boolean	Returns true if all TileTrees required by this view have been loaded.
auxiliaryCoordinateSystem Accessor ReadOnly	AuxCoordSystemState	get the auxiliary coordinate system state object for this ViewState.
backgroundColor Accessor ReadOnly	ColorDef	Get this view's background color.
categorySelector Accessor	CategorySelectorState	Selects the categories that are display by this ViewState.
className Accessor Static ReadOnly	string	The name of the BIS class associated with this class.
defaultExtentLimits Accessor Abstract ReadOnly	ExtentLimits	Returns the default extent limits for this ViewState.
description	string | undefined
details Accessor Abstract ReadOnly	ViewDetails	Provides access to optional detail settings for this view.
displayStyle Accessor	DisplayStyleState	The style that controls how the contents of the view are displayed.
extentLimits Accessor	ExtentLimits	Get or set the largest and smallest values allowed for the extents for this ViewState
globalScopeFactor Accessor ReadOnly	number	A value that represents the global scope of the view -- a value greater than one indicates that the scope of this view is global (viewing most of Earth).
isAttachedToViewport Accessor ReadOnly	boolean	Returns whether this view is currently being displayed by a Viewport.
isPrivate	boolean | undefined
modelDisplayTransformProvider Accessor	undefined | ModelDisplayTransformProvider	An object that can provide per-model transforms to be applied at display time.
name Accessor ReadOnly	string	Get the name of the ViewDefinition from which this ViewState originated.
onDisplayStyleChanged Readonly	BeEvent<(newStyle: DisplayStyleState) => void>	An event raised just before assignment to the displayStyle property, only if the view is attached to a Viewport.
onModelDisplayTransformProviderChanged Readonly	BeEvent<(newProvider: ModelDisplayTransformProvider) => void>	Event raised just before assignment to the modelDisplayTransformProvider property, only if the view is attached to a Viewport.
onViewedCategoriesChanged Readonly	BeEvent<() => void>	An event raised when the set of categories viewed by this view changes, only if the view is attached to a Viewport.
scheduleScript Accessor ReadOnly	undefined | RenderSchedule.Script	The RenderSchedule.Script that animates the contents of the view, if any.
viewFlags Accessor	ViewFlags	Flags controlling various aspects of this view's DisplayStyleState.

Inherited properties

Name	Type	Inherited from	Description
classFullName Accessor Static Inherited ReadOnly	string	ElementState	Get full BIS class name of this Entity in the form "SchemaName:ClassName".
classFullName Readonly Inherited	string	ElementState	The full class name in the form "schema:class".
className Accessor Inherited ReadOnly	string	ElementState	The name of the BIS class associated with this class.
code Readonly Inherited	Code	ElementState	The Code for this element
federationGuid Readonly Inherited	string | undefined	ElementState	A FederationGuid assigned to this element by some other federated database
id Readonly Inherited	string	ElementState	The Id of this Entity.
iModel Readonly Inherited	IModelConnection	ElementState	The iModel from which this Entity was loaded
jsonProperties Readonly Inherited	{ T }	ElementState	Optional json properties of this Entity.
model Readonly Inherited	string	ElementState	The ModelId of the Model containing this element
parent Readonly Inherited	RelatedElement | undefined	ElementState	The parent Element of this, or undefined if no parent.
schemaName Accessor Static Inherited ReadOnly	string	ElementState	The name of the BIS schema for this class.
userLabel Readonly Inherited	string | undefined	ElementState	A user-assigned label for this element.

Defined in

• core/frontend/src/ViewState.ts Line 220