Foundry Virtual Tabletop - API Documentation - Version 14
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    A component for displaying scrolling text effects at a canvas location using the CanvasInterfaceGroup#createScrollingText API. This can be used for damage numbers, status effects, or other floating text animations.

    const vfxConfig = {
    name: "damageNumber",
    components: {
    text: {
    type: "scrollingText",
    origin: {reference: "target"},
    content: "-12",
    duration: 1500,
    scrollDirection: CONST.TEXT_ANCHOR_POINTS.TOP,
    textStyle: {fill: "#ff4444", fontSize: 28, fontWeight: "bold"}
    }
    },
    timeline: [{component: "text"}]
    };
    const effect = new foundry.canvas.vfx.VFXEffect(vfxConfig);
    const target = game.user.targets.first();
    effect.play({target: target.center});

    Hierarchy (View Summary)

    Index

    Constructors

    Properties

    The source data object for this DataModel instance. Once constructed, the source object is sealed such that no keys may be added nor removed.

    parent: DataModel<object, DataModelConstructionContext> | null

    An immutable reverse-reference to a parent DataModel to which this model belongs.

    The defined and cached Data Schema for all instances of this DataModel.

    LOCALIZATION_PREFIXES: string[] = []

    A set of localization prefix paths which are used by this DataModel. This provides an alternative to defining the label and hint property of each field by having foundry map the labels to a structure inside the path provided by the prefix.

    JavaScript class definition and localization call.

    class MyDataModel extends foundry.abstract.DataModel {
    static defineSchema() {
    return {
    foo: new foundry.data.fields.StringField(),
    bar: new foundry.data.fields.NumberField()
    };
    }
    static LOCALIZATION_PREFIXES = ["MYMODULE.MYDATAMODEL"];
    }

    Hooks.on("i18nInit", () => {
    // Foundry will attempt to automatically localize models registered for a document subtype, so this step is only
    // needed for other data model usage, e.g. for a Setting.
    Localization.localizeDataModel(MyDataModel);
    });

    JSON localization file

    {
    "MYMODULE": {
    "MYDATAMODEL": {
    "FIELDS" : {
    "foo": {
    "label": "Foo",
    "hint": "Instructions for foo"
    },
    "bar": {
    "label": "Bar",
    "hint": "Instructions for bar"
    }
    }
    }
    }
    }
    TYPE: string = "scrollingText"

    Accessors

    • get assetPaths(): Set<string>

      Asset paths required to be loaded for this component.

      Returns Set<string>

    • get invalid(): boolean

      Is the current state of this DataModel invalid? The model is invalid if there is any unresolved failure.

      Returns boolean

    • get loaded(): boolean

      Have the materials for this component been loaded?

      Returns boolean

    • get managedDisplayObjects(): Record<string, DisplayObject[]>

      A registry of display objects which are managed by this component.

      Returns Record<string, DisplayObject[]>

    • get playing(): boolean

      Is the animation for this component playing?

      Returns boolean

    • get timeline(): Timeline

      A component-specific sub-timeline.

      Returns Timeline

    Methods

    • Perform subclass-specific teardown steps to destroy and dispose of component materials.

      Returns void

    • Adds a DisplayObject to the set of managed primary display objects. Entries in this list will be added to the primary canvas container when the component is attached and removed when the component is destroyed.

      Type Parameters

      • DisplayObject extends DisplayObject

      Parameters

      • object: DisplayObject

        The object to manage

      • Optionalgroup: string = "primary"

        A canvas group that should contain the object

      Returns DisplayObject

    • Attach display objects used by this component to the canvas containers that should render them.

      Returns void

    • Cancel playback of this component and destroy its contents.

      Returns Promise<void>

    • Prepare the timeline and create display objects used by this component. Components should override the _draw method to implement subclass-specific steps.

      Returns Promise<void>

    • Traverse the data model instance, obtaining the DataField definition for a field of a particular property.

      Parameters

      • key: string | string[]

        A property key like ["abilities", "strength"] or "abilities.strength"

      Returns DataField | undefined

      The corresponding DataField definition for that field, or undefined

    • Load this component.

      Returns Promise<void>

    • Reset the state of this data instance back to mirror the contained source data, erasing any changes.

      Returns void

    • Stop playback of this component and destroy its contents.

      Returns Promise<void>

    • Extract the source data for the DataModel into a simple object format that can be serialized.

      Returns object

      The document source data expressed as a plain object

    • Copy and transform the DataModel into a plain object. Draw the values of the extracted object from the data source (by default) otherwise from its transformed values.

      Parameters

      • Optionalsource: boolean = true

        Draw values from the underlying data source rather than transformed values

      Returns object

      The extracted primitive object

    • Update the DataModel locally by applying an object of changes to its source data. The provided changes are expanded, cleaned, validated, and stored to the source data object for this model. The provided changes argument is mutated in this process. The source data is then re-initialized to apply those changes to the prepared data. The method returns an object of differential changes which modified the original data.

      Parameters

      • changes: object = {}

        New values which should be applied to the data model

      • options: DataModelUpdateOptions = {}

        Options which determine how the new data is merged

      Returns object

      An object containing differential keys and values that were changed

      An error if the requested data model changes were invalid

    • Validate the data contained in the document to check for type and content. This method is intended to validate complete model records, verifying both individual field validation as well as joint model validity.

      For validating sets of partial model changes, it is preferred to call DataModel#updateSource as a dryRun. This method provides a convenience alias for such a workflow if changes are provided.

      Warning: if fallback handling is allowed, this process will mutate provided changes or model source data.

      Parameters

      Returns boolean

      Whether the data source or proposed change is reported as valid. A boolean is always returned if validation is non-strict.

      An error thrown if validation is strict and a failure occurs.

    • Protected

      Perform subclass-specific attachment steps to customize how display objects are added to the canvas.

      Returns void

    • Protected

      Configure the data model instance before validation and initialization workflows are performed.

      Parameters

      • Optionaloptions: object = {}

        Additional options modifying the configuration

      Returns void

    • Protected

      A generator that orders the DataFields in the DataSchema into an expected initialization order.

      Returns Generator<[string, DataField], any, any>

    • Protected

      Initialize the instance by copying data from the source object to instance attributes. This mirrors the workflow of SchemaField#initialize but with some added functionality.

      Parameters

      • Optionaloptions: object = {}

        Options provided to the model constructor

      Returns void

    • Protected

      Initialize the source data for a new DataModel instance. One-time migrations and initial cleaning operations are applied to the source data.

      Parameters

      • data: object | DataModel<object, DataModelConstructionContext>

        The candidate source data from which the model will be constructed

      • Optionaloptions: any = {}

        Options provided to the model constructor

      Returns object

      Migrated and cleaned source data which will be stored to the model instance, which is the same object as the data argument

    • Protected

      Perform subclass-specific loading steps to prepare assets for rendering.

      Returns Promise<void>

    • Protected

      Perform subclass-specific steps to discontinue component playback.

      Returns Promise<void>

    • Protected

      Perform the second step of the DataModel#_updateSource workflow which applies the prepared diff to the model.

      Parameters

      • copy: object

        The prepared copy of source data with changes applied

      • diff: object

        The differential changes that were applied to source

      • options: DataModelUpdateOptions

        Options which determine how the new data is merged

      • _state: data.types.DataModelUpdateState

        Data cleaning state which might include instructions for final commit

      Returns void

    • Protected

      Perform the first step of the DataModel#_updateSource workflow which applies changes to a copy of model source data and records the resulting diff.

      Parameters

      • copy: object

        A mutable copy of model source data

      • changes: object

        New values which should be applied to the data model

      • options: DataModelUpdateOptions

        Options which determine how the new data is merged

      • _state: data.types.DataModelUpdateState

        Data cleaning state

      Returns object

      The resulting difference applied to source data

      A failure if the proposed change is invalid

    • Wrap data migration in a try/catch which attempts it safely.

      Parameters

      • source: object

        Candidate source data for the module, before further cleaning

      • Optionaloptions: Readonly<DataModelCleaningOptions> = {}

        Additional options for how the field is cleaned

      Returns object

      Migrated source data, ready for further cleaning

    • Take data which conforms to the current data schema and add backwards-compatible accessors to it in order to support older code which uses this data.

      Parameters

      • data: object

        Data which matches the current schema

      • Optionaloptions: { embedded?: boolean } = {}

        Additional shimming options

        • Optionalembedded?: boolean

          Apply shims to embedded models?

      Returns object

      Data with added backwards-compatible properties, which is the same object as the data argument

    • Evaluate joint validation rules which apply validation conditions across multiple fields of the model. Field-specific validation rules should be defined as part of the DataSchema for the model. This method allows for testing aggregate rules which impose requirements on the overall model.

      Parameters

      • data: object

        Candidate data for the model

      Returns void

      An error if a validation failure is detected

    • Protected

      Apply final custom model-specific cleaning rules after data schema fields are cleaned. Subclass models can implement this function as an ideal place to apply custom imputation or cleaning. Cleaning must be done in-place rather than returning a different object.

      Parameters

      Returns object

      The original data object, with cleaning performed inplace