Polygon

Root object class from which all 2d shape classes inherit from

Tutorial

http://fabricjs.com/fabric-intro-part-1#objects

Fires

added

Fires

removed

Fires

selected

Fires

deselected

Fires

rotating

Fires

scaling

Fires

moving

Fires

skewing

Fires

modified

Fires

mousedown

Fires

mouseup

Fires

mouseover

Fires

mouseout

Fires

mousewheel

Fires

mousedblclick

Fires

dragover

Fires

dragenter

Fires

dragleave

Fires

drop

Extends

Polyline

Constructors

new Polygon()

new Polygon(points, options?): Polygon

Constructor

Parameters

• points: XY[] = []

Array of points (where each point is an object with x and y)

• options?: Partial<FabricObjectProps> = ...

Options object

Returns

Polygon

thisArg

Inherited from

Polyline.constructor

Example

var poly = new Polyline([
    { x: 10, y: 10 },
    { x: 50, y: 30 },
    { x: 40, y: 70 },
    { x: 60, y: 50 },
    { x: 100, y: 150 },
    { x: 40, y: 100 }
  ], {
  stroke: 'red',
  left: 100,
  top: 100
});

Defined in

src/shapes/Polyline.ts:118

Properties

__corner?

optional __corner: string

keeps the value of the last hovered corner during mouse move. 0 is no corner, or ‘mt’, ‘ml’, ‘mtr’ etc.. It should be private, but there is no harm in using it as a read-only property. this isn’t cleaned automatically. Non selected objects may have wrong values

Inherited from

Polyline.__corner

Defined in

src/shapes/Object/InteractiveObject.ts:105

_controlsVisibility

_controlsVisibility: Record<string, boolean>

a map of control visibility for this object. this was left when controls were introduced to not break the api too much this takes priority over the generic control visibility

Inherited from

Polyline._controlsVisibility

Defined in

src/shapes/Object/InteractiveObject.ts:112

_scaling?

optional _scaling: boolean

A boolean used from the gesture module to keep tracking of a scaling action when there is no scaling transform in place. This is an edge case and is used twice in all codebase. Probably added to keep track of some performance issues

TODO

use git blame to investigate why it was added DON’T USE IT. WE WILL TRY TO REMOVE IT

Inherited from

Polyline._scaling

Defined in

src/shapes/Object/InteractiveObject.ts:134

aCoords

aCoords: TCornerPoint

Describe object’s corner position in scene coordinates. The coordinates are derived from the following: left, top, width, height, scaleX, scaleY, skewX, skewY, angle, strokeWidth. The coordinates do not depend on viewport changes. The coordinates get updated with setCoords. You can calculate them without updating with ()

Inherited from

Polyline.aCoords

Defined in

src/shapes/Object/ObjectGeometry.ts:63

absolutePositioned

absolutePositioned: boolean

Meaningful ONLY when the object is used as clipPath. if true, the clipPath will have its top and left relative to canvas, and will not be influenced by the object transform. This will make the clipPath relative to the canvas, but clipping just a particular object. WARNING this is beta, this feature may change or be renamed. since 2.4.0

Default

false

Inherited from

Polyline.absolutePositioned

Defined in

src/shapes/Object/Object.ts:202

angle

angle: TDegree

Angle of rotation of an object (in degrees)

Default

Inherited from

Polyline.angle

Defined in

src/shapes/Object/ObjectGeometry.ts:575

backgroundColor

backgroundColor: string

Background color of an object. takes css colors https://www.w3.org/TR/css-color-3/

Default

Inherited from

Polyline.backgroundColor

Defined in

src/shapes/Object/Object.ts:189

borderColor

borderColor: string

Color of controlling borders of an object (when it’s active)

Default

rgb(178,204,255)

Inherited from

Polyline.borderColor

Defined in

src/shapes/Object/InteractiveObject.ts:74

borderDashArray

borderDashArray: null | number[]

Array specifying dash pattern of an object’s borders (hasBorder must be true)

Since

1.6.2

Inherited from

Polyline.borderDashArray

Defined in

src/shapes/Object/InteractiveObject.ts:75

borderOpacityWhenMoving

borderOpacityWhenMoving: number

Opacity of object’s controlling borders when object is active and moving

Default

0.4

Inherited from

Polyline.borderOpacityWhenMoving

Defined in

src/shapes/Object/InteractiveObject.ts:76

borderScaleFactor

borderScaleFactor: number

Scale factor of object’s controlling borders bigger number will make a thicker border border is 1, so this is basically a border thickness since there is no way to change the border itself.

Default

Inherited from

Polyline.borderScaleFactor

Defined in

src/shapes/Object/InteractiveObject.ts:77

centeredRotation

centeredRotation: boolean

When true the object will rotate on its center. When false will rotate around the origin point defined by originX and originY. The value of this property is IGNORED during a transform if the canvas has already centeredRotation set to true The object method rotate will always consider this property and never the canvas’s one.

Since

1.3.4

Default

Inherited from

Polyline.centeredRotation

Defined in

src/shapes/Object/Object.ts:203

centeredScaling

centeredScaling: boolean

When true, this object will use center point as the origin of transformation when being scaled via the controls.

Since

1.3.4

Default

Inherited from

Polyline.centeredScaling

Defined in

src/shapes/Object/Object.ts:204

clipPath?

optional clipPath: BaseFabricObject<Partial<ObjectProps>, SerializedObjectProps, ObjectEvents>

a fabricObject that, without stroke define a clipping area with their shape. filled in black the clipPath object gets used when the object has rendered, and the context is placed in the center of the object cacheCanvas. If you want 0,0 of a clipPath to align with an object center, use clipPath.originX/Y to ‘center’

Inherited from

Polyline.clipPath

Defined in

src/shapes/Object/Object.ts:200

clipPathId?

optional clipPathId: string

When an object is being exported as SVG as a clippath, a reference inside the SVG is needed. This reference is a UID in the fabric namespace and is temporary stored here.

Inherited from

Polyline.clipPathId

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:14

controls

controls: TControlSet

holds the controls for the object. controls are added by default_controls.js

Inherited from

Polyline.controls

Defined in

src/shapes/Object/InteractiveObject.ts:118

cornerColor

cornerColor: string

Color of controlling corners of an object (when it’s active)

Default

rgb(178,204,255)

Inherited from

Polyline.cornerColor

Defined in

src/shapes/Object/InteractiveObject.ts:68

cornerDashArray

cornerDashArray: null | number[]

Array specifying dash pattern of an object’s control (hasBorder must be true)

Since

1.6.2

Default

null

Inherited from

Polyline.cornerDashArray

Defined in

src/shapes/Object/InteractiveObject.ts:71

cornerSize

cornerSize: number

Size of object’s controlling corners (in pixels)

Default

Inherited from

Polyline.cornerSize

Defined in

src/shapes/Object/InteractiveObject.ts:65

cornerStrokeColor

cornerStrokeColor: string

Color of controlling corners of an object (when it’s active and transparentCorners false)

Since

1.6.2

Default

''

Inherited from

Polyline.cornerStrokeColor

Defined in

src/shapes/Object/InteractiveObject.ts:69

cornerStyle

cornerStyle: "circle" | "rect"

Specify style of control, ‘rect’ or ‘circle’ This is deprecated. In the future there will be a standard control render And you can swap it with one of the alternative proposed with the control api

Since

1.6.2

Default

'rect'

Inherited from

Polyline.cornerStyle

Defined in

src/shapes/Object/InteractiveObject.ts:70

dirty

dirty: boolean

When set to true, object’s cache will be rerendered next render call. since 1.7.0

Default

true

Inherited from

Polyline.dirty

Defined in

src/shapes/Object/Object.ts:229

evented

evented: boolean

When set to false, an object can not be a target of events. All events propagate through it. Introduced in v1.3.4

Default

Inherited from

Polyline.evented

Defined in

src/shapes/Object/InteractiveObject.ts:82

exactBoundingBox

exactBoundingBox: boolean

WARNING: Feature in progress Calculate the exact bounding box taking in account strokeWidth on acute angles this will be turned to true by default on fabric 6.0 maybe will be left in as an optimization since calculations may be slow

Default

false

Inherited from

Polyline.exactBoundingBox

Defined in

src/shapes/Polyline.ts:61

excludeFromExport

excludeFromExport: boolean

When true, object is not exported in OBJECT/JSON

Since

1.6.3

Default

Inherited from

Polyline.excludeFromExport

Defined in

src/shapes/Object/Object.ts:196

fill

fill: null | string | TFiller

Color of object’s fill takes css colors https://www.w3.org/TR/css-color-3/

Default

rgb(0,0,0)

Inherited from

Polyline.fill

Defined in

src/shapes/Object/Object.ts:179

fillRule

fillRule: CanvasFillRule

Fill rule used to fill an object accepted values are nonzero, evenodd Backwards incompatibility note: This property was used for setting globalCompositeOperation until v1.4.12 (use globalCompositeOperation instead)

Default

nonzero

Inherited from

Polyline.fillRule

Defined in

src/shapes/Object/Object.ts:180

flipX

flipX: boolean

When true, an object is rendered as flipped horizontally

Default

false

Inherited from

Polyline.flipX

Defined in

src/shapes/Object/ObjectGeometry.ts:567

flipY

flipY: boolean

When true, an object is rendered as flipped vertically

Default

false

Inherited from

Polyline.flipY

Defined in

src/shapes/Object/ObjectGeometry.ts:568

globalCompositeOperation

globalCompositeOperation: GlobalCompositeOperation

Composite rule used for canvas globalCompositeOperation

Default

Inherited from

Polyline.globalCompositeOperation

Defined in

src/shapes/Object/Object.ts:188

hasBorders

hasBorders: boolean

When set to false, object’s controlling borders are not rendered

Default

Inherited from

Polyline.hasBorders

Defined in

src/shapes/Object/InteractiveObject.ts:78

hasControls

hasControls: boolean

When set to false, object’s controls are not displayed and can not be used to manipulate object

Default

true

Inherited from

Polyline.hasControls

Defined in

src/shapes/Object/InteractiveObject.ts:72

height

height: number

Object height

Default

Inherited from

Polyline.height

Defined in

src/shapes/Object/ObjectGeometry.ts:566

hoverCursor

hoverCursor: null | string

Default cursor value used when hovering over this object on canvas

Default

null

Inherited from

Polyline.hoverCursor

Defined in

src/shapes/Object/InteractiveObject.ts:86

includeDefaultValues

includeDefaultValues: boolean

When false, default object’s values are not included in its serialization

Default

Inherited from

Polyline.includeDefaultValues

Defined in

src/shapes/Object/Object.ts:195

inverted

inverted: boolean

Meaningful ONLY when the object is used as clipPath. if true, the clipPath will make the object clip to the outside of the clipPath since 2.4.0

Default

false

Inherited from

Polyline.inverted

Defined in

src/shapes/Object/Object.ts:201

isMoving?

optional isMoving: boolean

internal boolean to signal the code that the object is part of the move action.

Inherited from

Polyline.isMoving

Defined in

src/shapes/Object/InteractiveObject.ts:124

left

left: number

Left position of an object. Note that by default it’s relative to object left. You can change this by setting originX

Default

Inherited from

Polyline.left

Defined in

src/shapes/Object/ObjectGeometry.ts:564

lockMovementX

lockMovementX: boolean

When true, object horizontal movement is locked

Default

Inherited from

Polyline.lockMovementX

Defined in

src/shapes/Object/InteractiveObject.ts:56

lockMovementY

lockMovementY: boolean

When true, object vertical movement is locked

Default

Inherited from

Polyline.lockMovementY

Defined in

src/shapes/Object/InteractiveObject.ts:57

lockRotation

lockRotation: boolean

When true, object rotation is locked

Default

Inherited from

Polyline.lockRotation

Defined in

src/shapes/Object/InteractiveObject.ts:58

lockScalingFlip

lockScalingFlip: boolean

When true, object cannot be flipped by scaling into negative values

Default

Inherited from

Polyline.lockScalingFlip

Defined in

src/shapes/Object/InteractiveObject.ts:63

lockScalingX

lockScalingX: boolean

When true, object horizontal scaling is locked

Default

Inherited from

Polyline.lockScalingX

Defined in

src/shapes/Object/InteractiveObject.ts:59

lockScalingY

lockScalingY: boolean

When true, object vertical scaling is locked

Default

Inherited from

Polyline.lockScalingY

Defined in

src/shapes/Object/InteractiveObject.ts:60

lockSkewingX

lockSkewingX: boolean

When true, object horizontal skewing is locked

Default

Inherited from

Polyline.lockSkewingX

Defined in

src/shapes/Object/InteractiveObject.ts:61

lockSkewingY

lockSkewingY: boolean

When true, object vertical skewing is locked

Default

Inherited from

Polyline.lockSkewingY

Defined in

src/shapes/Object/InteractiveObject.ts:62

matrixCache?

optional matrixCache: TMatrixCache

storage cache for object full transform matrix

Inherited from

Polyline.matrixCache

Defined in

src/shapes/Object/ObjectGeometry.ts:73

minScaleLimit

minScaleLimit: number

Minimum allowed scale value of an object

Default

Inherited from

Polyline.minScaleLimit

Defined in

src/shapes/Object/Object.ts:174

moveCursor

moveCursor: null | string

Default cursor value used when moving this object on canvas

Default

null

Inherited from

Polyline.moveCursor

Defined in

src/shapes/Object/InteractiveObject.ts:87

noScaleCache

noScaleCache: boolean

When true, cache does not get updated during scaling. The picture will get blocky if scaled too much and will be redrawn with correct details at the end of scaling. this setting is performance and application dependant. default to true since 1.7.0

Default

true

Inherited from

Polyline.noScaleCache

Defined in

src/shapes/Object/InteractiveObject.ts:51

oCoords

oCoords: Record<string, TOCoord>

The object’s controls’ position in viewport coordinates Calculated by Control#positionHandler and Control#calcCornerCoords, depending on padding. corner/touchCorner describe the 4 points forming the interactive area of the corner. Used to draw and locate controls.

Inherited from

Polyline.oCoords

Defined in

src/shapes/Object/InteractiveObject.ts:95

objectCaching

objectCaching: boolean

When true, object is cached on an additional canvas. When false, object is not cached unless necessary ( clipPath ) default to true

Since

1.7.0

Default

true

Inherited from

Polyline.objectCaching

Defined in

src/shapes/Object/Object.ts:198

opacity

opacity: number

Opacity of an object

Default

Inherited from

Polyline.opacity

Defined in

src/shapes/Object/Object.ts:176

originX

originX: TOriginX

Horizontal origin of transformation of an object (left, center, right or [0, 1]) See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups

Default

'left'

Inherited from

Polyline.originX

Defined in

src/shapes/Object/ObjectGeometry.ts:573

originY

originY: TOriginY

Vertical origin of transformation of an object (top, center, bottom or [0, 1]) See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups

Default

'top'

Inherited from

Polyline.originY

Defined in

src/shapes/Object/ObjectGeometry.ts:574

ownMatrixCache?

optional ownMatrixCache: TMatrixCache

storage cache for object transform matrix

Inherited from

Polyline.ownMatrixCache

Defined in

src/shapes/Object/ObjectGeometry.ts:68

padding

padding: number

Padding between object and its controlling borders (in pixels)

Default

Inherited from

Polyline.padding

Defined in

src/shapes/Object/ObjectGeometry.ts:53

paintFirst

paintFirst: "fill" | "stroke"

Determines if the fill or the stroke is drawn first (one of “fill” or “stroke”)

Default

Inherited from

Polyline.paintFirst

Defined in

src/shapes/Object/Object.ts:178

parent?

optional parent: Group

A reference to the parent of the object Used to keep the original parent ref when the object has been added to an ActiveSelection, hence loosing the group ref

Inherited from

Polyline.parent

Defined in

src/shapes/Object/Object.ts:1583

pathOffset

pathOffset: Point

Inherited from

Polyline.pathOffset

Defined in

src/shapes/Polyline.ts:91

perPixelTargetFind

perPixelTargetFind: boolean

When set to true, objects are “found” on canvas on per-pixel basis rather than according to bounding box

Default

Inherited from

Polyline.perPixelTargetFind

Defined in

src/shapes/Object/InteractiveObject.ts:83

points

points: XY[]

Points array

Default

Inherited from

Polyline.points

Defined in

src/shapes/Polyline.ts:50

scaleX

scaleX: number

Object scale factor (horizontal)

Default

Inherited from

Polyline.scaleX

Defined in

src/shapes/Object/ObjectGeometry.ts:569

scaleY

scaleY: number

Object scale factor (vertical)

Default

Inherited from

Polyline.scaleY

Defined in

src/shapes/Object/ObjectGeometry.ts:570

selectable

selectable: boolean

When set to false, an object can not be selected for modification (using either point-click-based or group-based selection). But events still fire on it.

Default

Inherited from

Polyline.selectable

Defined in

src/shapes/Object/InteractiveObject.ts:81

selectionBackgroundColor

selectionBackgroundColor: string

Selection Background color of an object. colored layer behind the object when it is active. does not mix good with globalCompositeOperation methods.

Default

Inherited from

Polyline.selectionBackgroundColor

Defined in

src/shapes/Object/InteractiveObject.ts:79

shadow

shadow: null | Shadow

Shadow object representing shadow of this shape

Default

null

Inherited from

Polyline.shadow

Defined in

src/shapes/Object/Object.ts:191

skewX

skewX: number

Angle of skew on x axes of an object (in degrees)

Default

Inherited from

Polyline.skewX

Defined in

src/shapes/Object/ObjectGeometry.ts:571

skewY

skewY: number

Angle of skew on y axes of an object (in degrees)

Default

Inherited from

Polyline.skewY

Defined in

src/shapes/Object/ObjectGeometry.ts:572

snapAngle?

optional snapAngle: TDegree

The angle that an object will lock to while rotating.

Inherited from

Polyline.snapAngle

Defined in

src/shapes/Object/InteractiveObject.ts:53

snapThreshold?

optional snapThreshold: TDegree

The angle difference from the current snapped angle in which snapping should occur. When undefined, the snapThreshold will default to the snapAngle.

Inherited from

Polyline.snapThreshold

Defined in

src/shapes/Object/InteractiveObject.ts:54

stroke

stroke: null | string | TFiller

When defined, an object is rendered via stroke and this property specifies its color takes css colors https://www.w3.org/TR/css-color-3/

Default

null

Inherited from

Polyline.stroke

Defined in

src/shapes/Object/Object.ts:181

strokeDashArray

strokeDashArray: null | number[]

Array specifying dash pattern of an object’s stroke (stroke must be defined)

Default

null;

Inherited from

Polyline.strokeDashArray

Defined in

src/shapes/Object/Object.ts:182

strokeDashOffset

strokeDashOffset: number

Line offset of an object’s stroke

Default

Inherited from

Polyline.strokeDashOffset

Defined in

src/shapes/Object/Object.ts:183

strokeDiff

strokeDiff: Point

Inherited from

Polyline.strokeDiff

Defined in

src/shapes/Polyline.ts:97

strokeLineCap

strokeLineCap: CanvasLineCap

Line endings style of an object’s stroke (one of “butt”, “round”, “square”)

Default

butt

Inherited from

Polyline.strokeLineCap

Defined in

src/shapes/Object/Object.ts:184

strokeLineJoin

strokeLineJoin: CanvasLineJoin

Corner style of an object’s stroke (one of “bevel”, “round”, “miter”)

Default

Inherited from

Polyline.strokeLineJoin

Defined in

src/shapes/Object/Object.ts:185

strokeMiterLimit

strokeMiterLimit: number

Maximum miter length (used for strokeLineJoin = “miter”) of an object’s stroke

Default

Inherited from

Polyline.strokeMiterLimit

Defined in

src/shapes/Object/Object.ts:186

strokeOffset

strokeOffset: Point

Inherited from

Polyline.strokeOffset

Defined in

src/shapes/Polyline.ts:93

strokeUniform

strokeUniform: boolean

When false, the stoke width will scale with the object. When true, the stroke will always match the exact pixel size entered for stroke width. this Property does not work on Text classes or drawing call that uses strokeText,fillText methods default to false

Since

2.6.0

Default

false

Default

false

Inherited from

Polyline.strokeUniform

Defined in

src/shapes/Object/ObjectGeometry.ts:577

strokeWidth

strokeWidth: number

Width of a stroke used to render this object

Default

Inherited from

Polyline.strokeWidth

Defined in

src/shapes/Object/ObjectGeometry.ts:576

top

top: number

Top position of an object. Note that by default it’s relative to object top. You can change this by setting originY

Default

Inherited from

Polyline.top

Defined in

src/shapes/Object/ObjectGeometry.ts:563

touchCornerSize

touchCornerSize: number

Size of object’s controlling corners when touch interaction is detected

Default

Inherited from

Polyline.touchCornerSize

Defined in

src/shapes/Object/InteractiveObject.ts:66

transparentCorners

transparentCorners: boolean

When true, object’s controlling corners are rendered as transparent inside (i.e. stroke instead of fill)

Default

true

Inherited from

Polyline.transparentCorners

Defined in

src/shapes/Object/InteractiveObject.ts:67

visible

visible: boolean

When set to false, an object is not rendered on canvas

Default

Inherited from

Polyline.visible

Defined in

src/shapes/Object/Object.ts:193

width

width: number

Object width

Default

Inherited from

Polyline.width

Defined in

src/shapes/Object/ObjectGeometry.ts:565

ATTRIBUTE_NAMES

static ATTRIBUTE_NAMES: string[]

List of attribute names to account for when parsing SVG element (used by Polyline.fromElement)

Static

cacheProperties

static cacheProperties: string[]

List of properties to consider when checking if cache needs refresh Those properties are checked by calls to Object.set(key, value). If the key is in this list, the object is marked as dirty and refreshed at the next render

Inherited from

Polyline.cacheProperties

Defined in

src/shapes/Polyline.ts:95

colorProperties

static colorProperties: string[]

List of properties to consider for animating colors.

Inherited from

Polyline.colorProperties

Defined in

src/shapes/Object/Object.ts:1490

customProperties

static customProperties: string[] = []

Define a list of custom properties that will be serialized when instance.toObject() gets called

Inherited from

Polyline.customProperties

Defined in

src/shapes/Object/Object.ts:1731

layoutProperties

static layoutProperties: keyof Polyline<Partial<FabricObjectProps>, SerializedPolylineProps, ObjectEvents>[]

A list of properties that if changed trigger a recalculation of dimensions

Todo

check if you really need to recalculate for all cases

Inherited from

Polyline.layoutProperties

Defined in

src/shapes/Polyline.ts:80

ownDefaults

static ownDefaults: Partial<TClassProperties<Polyline<Partial<FabricObjectProps>, SerializedPolylineProps, ObjectEvents>>> = polylineDefaultValues

Overrides

Polyline.ownDefaults

Defined in

src/shapes/Polygon.ts:5

stateProperties

static stateProperties: string[]

This list of properties is used to check if the state of an object is changed. This state change now is only used for children of groups to understand if a group needs its cache regenerated during a .set call

Inherited from

Polyline.stateProperties

Defined in

src/shapes/Object/Object.ts:212

type

static type: string = 'Polygon'

The class type. This is used for serialization and deserialization purposes and internally it can be used to identify classes. When we transform a class in a plain JS object we need a way to recognize which class it was, and the type is the way we do that. It has no other purposes and you should not give one. Hard to reach on instances and please do not use to drive instance’s logic (this.constructor.type). To idenfity a class use instanceof class ( instanceof Rect ). We do not do that in fabricJS code because we want to try to have code splitting possible.

Overrides

Polyline.type

Defined in

src/shapes/Polygon.ts:7

Accessors

type

get type(): string

Legacy identifier of the class. Prefer using utils like isType or instanceOf Will be removed in fabric 7 or 8. The setter exists to avoid type errors in old code and possibly current deserialization code.

TODO

add sustainable warning message

set type(value): void

Parameters

• value: string

Returns

string

Inherited from

Polyline.type

Defined in

src/shapes/Object/Object.ts:340

Methods

_drawClipPath()

_drawClipPath(ctx, clipPath?): void

Prepare clipPath state and cache and draw it on instance’s cache

Parameters

• ctx: CanvasRenderingContext2D

• clipPath?: BaseFabricObject<Partial<ObjectProps>, SerializedObjectProps, ObjectEvents>

Returns

void

Inherited from

Polyline._drawClipPath

Defined in

src/shapes/Object/Object.ts:873

_getNonTransformedDimensions()

_getNonTransformedDimensions(): Point

stroke is taken in account in size

Returns

Point

Inherited from

Polyline._getNonTransformedDimensions

Defined in

src/shapes/Polyline.ts:236

_limitCacheSize()

_limitCacheSize(dims): any

Limit the cache dimensions so that X * Y do not cross config.perfLimitSizeTotal and each side do not cross fabric.cacheSideLimit those numbers are configurable so that you can get as much detail as you want making bargain with performances.

Parameters

• dims: any

Returns

any

.width width of canvas

.height height of canvas

.zoomX zoomX zoom value to unscale the canvas before drawing cache

.zoomY zoomY zoom value to unscale the canvas before drawing cache

Inherited from

Polyline._limitCacheSize

Defined in

src/shapes/Object/Object.ts:389

_removeCacheCanvas()

_removeCacheCanvas(): void

Remove cacheCanvas and its dimensions from the objects

Returns

void

Inherited from

Polyline._removeCacheCanvas

Defined in

src/shapes/Object/Object.ts:729

_renderControls()

_renderControls(ctx, styleOverride?): void

Renders controls and borders for the object the context here is not transformed

Parameters

• ctx: CanvasRenderingContext2D

Context to render on

• styleOverride?: TStyleOverride = {}

properties to override the object style

Returns

void

Inherited from

Polyline._renderControls

Todo

move to interactivity

Defined in

src/shapes/Object/InteractiveObject.ts:435

_setClippingProperties()

_setClippingProperties(ctx): void

Parameters

• ctx: CanvasRenderingContext2D

Returns

void

Inherited from

Polyline._setClippingProperties

Defined in

src/shapes/Object/Object.ts:1011

_setFillStyles()

_setFillStyles(ctx, __namedParameters): void

Parameters

• ctx: CanvasRenderingContext2D

• __namedParameters: Pick<Polygon, "fill">

Returns

void

Inherited from

Polyline._setFillStyles

Defined in

src/shapes/Object/Object.ts:1000

_setStrokeStyles()

_setStrokeStyles(ctx, decl): void

Parameters

• ctx: CanvasRenderingContext2D

Returns

void

Inherited from

Polyline._setStrokeStyles

Defined in

src/shapes/Object/Object.ts:958

_setupCompositeOperation()

_setupCompositeOperation(ctx): void

Sets canvas globalCompositeOperation for specific object custom composition operation for the particular object can be specified using globalCompositeOperation property

Parameters

• ctx: CanvasRenderingContext2D

Rendering canvas context

Returns

void

Inherited from

Polyline._setupCompositeOperation

Defined in

src/shapes/Object/Object.ts:1465

_toSVG()

_toSVG(): string[]

Returns svg representation of an instance

Returns

string[]

an array of strings with the specific svg representation of the instance

Inherited from

Polyline._toSVG

Defined in

src/shapes/Polyline.ts:326

addPaintOrder()

addPaintOrder(this): string

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

Returns

string

Inherited from

Polyline.addPaintOrder

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:249

animate()

animate<T>(animatable, options?): Record<string, TAnimation<T>>

Animates object’s properties

Type Parameters

• T extends number | number[] | TColorArg

Parameters

• animatable: Record<string, T>

map of keys and end values

• options?: Partial<AnimationOptions<T>>

Returns

Record<string, TAnimation<T>>

map of animation contexts

As object — multiple properties

object.animate({ left: …, top: … }); object.animate({ left: …, top: … }, { duration: … });

Inherited from

Polyline.animate

Tutorial

http://fabricjs.com/fabric-intro-part-2#animation

Defined in

src/shapes/Object/Object.ts:1504

calcACoords()

calcACoords(): TCornerPoint

Calculates the coordinates of the 4 corner of the bbox, in absolute coordinates. those never change with zoom or viewport changes.

Returns

TCornerPoint

Inherited from

Polyline.calcACoords

Defined in

src/shapes/Object/ObjectGeometry.ts:427

calcOCoords()

calcOCoords(): Record<string, TOCoord>

Calculates the coordinates of the center of each control plus the corners of the control itself This basically just delegates to each control positionHandler WARNING: changing what is passed to positionHandler is a breaking change, since position handler is a public api and should be done just if extremely necessary

Returns

Record<string, TOCoord>

Inherited from

Polyline.calcOCoords

Defined in

src/shapes/Object/InteractiveObject.ts:255

calcOwnMatrix()

calcOwnMatrix(): TMat2D

calculate transform matrix that represents the current transformations from the object’s properties, this matrix does not include the group transformation

Returns

TMat2D

transform matrix for the object

Inherited from

Polyline.calcOwnMatrix

Defined in

src/shapes/Object/ObjectGeometry.ts:513

calcTransformMatrix()

calcTransformMatrix(skipGroup?): TMat2D

calculate transform matrix that represents the current transformations from the object’s properties.

Parameters

• skipGroup?: boolean = false

return transform matrix for object not counting parent transformations There are some situation in which this is useful to avoid the fake rotation.

Returns

TMat2D

transform matrix for the object

Inherited from

Polyline.calcTransformMatrix

Defined in

src/shapes/Object/ObjectGeometry.ts:485

canDrop()

canDrop(_e): boolean

Override to customize drag and drop behavior

Parameters

• _e: DragEvent

Returns

boolean

true if the object currently dragged can be dropped on the target

Inherited from

Polyline.canDrop

Defined in

src/shapes/Object/InteractiveObject.ts:701

clearContextTop()

clearContextTop(restoreManually?): undefined | CanvasRenderingContext2D

Clears the canvas.contextTop in a specific area that corresponds to the object’s bounding box that is in the canvas.contextContainer. This function is used to clear pieces of contextTop where we render ephemeral effects on top of the object. Example: blinking cursor text selection, drag effects.

Parameters

• restoreManually?: boolean

When true won’t restore the context after clear, in order to draw something else.

Returns

undefined | CanvasRenderingContext2D

canvas.contextTop that is either still transformed with the object transformMatrix, or restored to neutral transform

Inherited from

Polyline.clearContextTop

Todo

discuss swapping restoreManually with a renderCallback, but think of async issues

Defined in

src/shapes/Object/InteractiveObject.ts:627

clone()

clone(propertiesToInclude?): Promise<Polygon>

Clones an instance.

Parameters

• propertiesToInclude?: string[]

Any properties that you might want to additionally include in the output

Returns

Promise<Polygon>

Inherited from

Polyline.clone

Defined in

src/shapes/Object/Object.ts:1239

cloneAsImage()

cloneAsImage(options?): FabricImage<Partial<ImageProps>, SerializedImageProps, ObjectEvents>

Creates an instance of Image out of an object makes use of toCanvasElement. Once this method was based on toDataUrl and loadImage, so it also had a quality and format option. toCanvasElement is faster and produce no loss of quality. If you need to get a real Jpeg or Png from an object, using toDataURL is the right way to do it. toCanvasElement and then toBlob from the obtained canvas is also a good option.

Parameters

• options?: ObjectToCanvasElementOptions

for clone as image, passed to toDataURL

Returns

FabricImage<Partial<ImageProps>, SerializedImageProps, ObjectEvents>

Object cloned as image.

Inherited from

Polyline.cloneAsImage

Todo

fix the export type, it could not be Image but the type that getClass return for ‘image’.

Defined in

src/shapes/Object/Object.ts:1265

complexity()

complexity(): number

Returns complexity of an instance

Returns

number

complexity of this instance

Inherited from

Polyline.complexity

Defined in

src/shapes/Polyline.ts:379

containsPoint()

containsPoint(point): boolean

Checks if point is inside the object

Parameters

• point: Point

Point to check against

Returns

boolean

true if point is inside the object

Inherited from

Polyline.containsPoint

Defined in

src/shapes/Object/ObjectGeometry.ts:282

dispose()

dispose(): void

cancel instance’s running animations override if necessary to dispose artifacts such as clipPath

Returns

void

Inherited from

Polyline.dispose

Defined in

src/shapes/Object/Object.ts:1475

drawBorders()

drawBorders(ctx, options, styleOverride?): void

Draws borders of an object’s bounding box. Requires public properties: width, height Requires public options: padding, borderColor

Parameters

• ctx: CanvasRenderingContext2D

Context to draw on

• options: Required<Omit<TComposeMatrixArgs, "flipX" | "flipY">>

object representing current object parameters

• styleOverride?: TStyleOverride

object to override the object style

Returns

void

Inherited from

Polyline.drawBorders

Defined in

src/shapes/Object/InteractiveObject.ts:478

drawCacheOnCanvas()

drawCacheOnCanvas(this, ctx): void

Paint the cached copy of the object on the target context.

Parameters

• this: TCachedFabricObject<BaseFabricObject<Partial<ObjectProps>, SerializedObjectProps, ObjectEvents>>

• ctx: CanvasRenderingContext2D

Context to render on

Returns

void

Inherited from

Polyline.drawCacheOnCanvas

Defined in

src/shapes/Object/Object.ts:891

drawClipPathOnCache()

drawClipPathOnCache(ctx, clipPath): void

Execute the drawing operation for an object clipPath

Parameters

• ctx: CanvasRenderingContext2D

Context to render on

• clipPath: TCachedFabricObject<BaseFabricObject<Partial<ObjectProps>, SerializedObjectProps, ObjectEvents>>

Returns

void

Inherited from

Polyline.drawClipPathOnCache

Defined in

src/shapes/Object/Object.ts:820

drawControls()

drawControls(ctx, styleOverride): void

Draws corners of an object’s bounding box. Requires public properties: width, height Requires public options: cornerSize, padding Be aware that since fabric 6.0 this function does not call setCoords anymore. setCoords needs to be called manually if the object of which we are rendering controls is outside the standard selection and transform process.

Parameters

• ctx: CanvasRenderingContext2D

Context to draw on

• styleOverride: Partial<Pick<InteractiveFabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>, "cornerStyle" | "cornerSize" | "cornerColor" | "cornerStrokeColor" | "cornerDashArray" | "transparentCorners">> = {}

object to override the object style

Returns

void

Inherited from

Polyline.drawControls

Defined in

src/shapes/Object/InteractiveObject.ts:550

drawControlsConnectingLines()

drawControlsConnectingLines(ctx, size): void

Draws lines from a borders of an object’s bounding box to controls that have withConnection property set. Requires public properties: width, height Requires public options: padding, borderColor

Parameters

• ctx: CanvasRenderingContext2D

Context to draw on

• size: Point

object size x = width, y = height

Returns

void

Inherited from

Polyline.drawControlsConnectingLines

Defined in

src/shapes/Object/InteractiveObject.ts:517

drawObject()

drawObject(ctx, forClipping?): void

Execute the drawing operation for an object on a specified context

Parameters

• ctx: CanvasRenderingContext2D

Context to render on

• forClipping?: boolean

apply clipping styles

Returns

void

Inherited from

Polyline.drawObject

Defined in

src/shapes/Object/Object.ts:852

drawSelectionBackground()

drawSelectionBackground(ctx): void

Draws a colored layer behind the object, inside its selection borders. Requires public options: padding, selectionBackgroundColor this function is called when the context is transformed has checks to be skipped when the object is on a staticCanvas

Parameters

• ctx: CanvasRenderingContext2D

Context to draw on

Returns

void

Inherited from

Polyline.drawSelectionBackground

Todo

evaluate if make this disappear in favor of a pre-render hook for objects this was added by Andrea Bogazzi to make possible some feature for work reasons it seemed a good option, now is an edge case

Defined in

src/shapes/Object/InteractiveObject.ts:375

findCommonAncestors()

findCommonAncestors<T>(other): AncestryComparison

Compare ancestors

Type Parameters

• T extends Polygon

Parameters

• other: T

Returns

AncestryComparison

an object that represent the ancestry situation.

Inherited from

Polyline.findCommonAncestors

Defined in

src/shapes/Object/Object.ts:1622

fire()

fire<K>(eventName, options?): void

Fires event with an optional options object

Type Parameters

• K extends keyof ObjectEvents

Parameters

• eventName: K

Event name to fire

• options?: ObjectEvents[K]

Options object

Returns

void

Inherited from

Polyline.fire

Defined in

src/Observable.ts:167

forEachControl()

forEachControl(fn): void

Calls a function for each control. The function gets called, with the control, the control’s key and the object that is calling the iterator

Parameters

• fn

function to iterate over the controls over

Returns

void

Inherited from

Polyline.forEachControl

Defined in

src/shapes/Object/InteractiveObject.ts:353

get()

get(property): any

Basic getter

Parameters

• property: string

Property name

Returns

any

value of a property

Inherited from

Polyline.get

Defined in

src/CommonMethods.ts:59

getActiveControl()

getActiveControl(): undefined | object

Returns

undefined | object

Inherited from

Polyline.getActiveControl

Defined in

src/shapes/Object/InteractiveObject.ts:194

getAncestors()

getAncestors(): Ancestors

Returns

Ancestors

ancestors (excluding ActiveSelection) from bottom to top

Inherited from

Polyline.getAncestors

Defined in

src/shapes/Object/Object.ts:1605

getBoundingRect()

getBoundingRect(): TBBox

Returns coordinates of object’s bounding rectangle (left, top, width, height) the box is intended as aligned to axis of canvas.

Returns

TBBox

Object with left, top, width, height properties

Inherited from

Polyline.getBoundingRect

Defined in

src/shapes/Object/ObjectGeometry.ts:343

getCanvasRetinaScaling()

getCanvasRetinaScaling(): number

Returns

number

Inherited from

Polyline.getCanvasRetinaScaling

Defined in

src/shapes/Object/ObjectGeometry.ts:400

getCenterPoint()

getCenterPoint(): Point

Returns the center coordinates of the object relative to canvas

Returns

Point

Inherited from

Polyline.getCenterPoint

Defined in

src/shapes/Object/ObjectGeometry.ts:723

getCoords()

getCoords(): Point[]

Returns

Point[]

[tl, tr, br, bl] in the scene plane

Inherited from

Polyline.getCoords

Defined in

src/shapes/Object/ObjectGeometry.ts:204

getObjectOpacity()

getObjectOpacity(): number

Return the object opacity counting also the group property

Returns

number

Inherited from

Polyline.getObjectOpacity

Defined in

src/shapes/Object/Object.ts:590

getObjectScaling()

getObjectScaling(): Point

Return the object scale factor counting also the group scaling

Returns

Point

Inherited from

Polyline.getObjectScaling

Defined in

src/shapes/Object/Object.ts:559

getPointByOrigin()

getPointByOrigin(originX, originY): Point

Returns the coordinates of the object as if it has a different origin

Parameters

• originX: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• originY: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

Point

Inherited from

Polyline.getPointByOrigin

Defined in

src/shapes/Object/ObjectGeometry.ts:748

getRelativeCenterPoint()

getRelativeCenterPoint(): Point

Returns the center coordinates of the object relative to it’s parent

Returns

Point

Inherited from

Polyline.getRelativeCenterPoint

Defined in

src/shapes/Object/ObjectGeometry.ts:734

getRelativeX()

getRelativeX(): number

Returns

number

x position according to object’s originX property in parent’s coordinate plane
if parent is canvas then this property is identical to getX

Inherited from

Polyline.getRelativeX

Defined in

src/shapes/Object/ObjectGeometry.ts:115

getRelativeXY()

getRelativeXY(): Point

Returns

Point

x,y position according to object’s originX originY properties in parent’s coordinate plane

Inherited from

Polyline.getRelativeXY

Defined in

src/shapes/Object/ObjectGeometry.ts:176

getRelativeY()

getRelativeY(): number

Returns

number

y position according to object’s originY property in parent’s coordinate plane
if parent is canvas then this property is identical to getY

Inherited from

Polyline.getRelativeY

Defined in

src/shapes/Object/ObjectGeometry.ts:131

getScaledHeight()

getScaledHeight(): number

Returns height of an object bounding box counting transformations

Returns

number

height value

Inherited from

Polyline.getScaledHeight

Todo

shouldn’t this account for group transform and return the actual size in canvas coordinate plane?

Defined in

src/shapes/Object/ObjectGeometry.ts:361

getScaledWidth()

getScaledWidth(): number

Returns width of an object’s bounding box counting transformations

Returns

number

width value

Inherited from

Polyline.getScaledWidth

Todo

shouldn’t this account for group transform and return the actual size in canvas coordinate plane?

Defined in

src/shapes/Object/ObjectGeometry.ts:352

getSvgCommons()

getSvgCommons(this): string

Returns id attribute for svg output

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents> & object

Returns

string

Inherited from

Polyline.getSvgCommons

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:84

getSvgFilter()

getSvgFilter(this): string

Returns filter for svg shadow

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

Returns

string

Inherited from

Polyline.getSvgFilter

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:76

getSvgStyles()

getSvgStyles(this, skipShadow?): string

Returns styles-string for svg-export

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

• skipShadow?: boolean

a boolean to skip shadow filter output

Returns

string

Inherited from

Polyline.getSvgStyles

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:21

getSvgTransform()

getSvgTransform(this, full?, additionalTransform?): string

Returns transform-string for svg-export

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

• full?: boolean

• additionalTransform?: string = ''

Returns

string

Inherited from

Polyline.getSvgTransform

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:103

getTotalAngle()

getTotalAngle(): TDegree

Returns the object angle relative to canvas counting also the group property

Returns

TDegree

Inherited from

Polyline.getTotalAngle

Defined in

src/shapes/Object/ObjectGeometry.ts:408

getTotalObjectScaling()

getTotalObjectScaling(): Point

Return the object scale factor counting also the group scaling, zoom and retina

Returns

Point

object with scaleX and scaleY properties

Inherited from

Polyline.getTotalObjectScaling

Defined in

src/shapes/Object/Object.ts:576

getViewportTransform()

getViewportTransform(): TMat2D

Retrieves viewportTransform from Object’s canvas if available

Returns

TMat2D

Inherited from

Polyline.getViewportTransform

Defined in

src/shapes/Object/ObjectGeometry.ts:418

getX()

getX(): number

Returns

number

x position according to object’s originX property in canvas coordinate plane

Inherited from

Polyline.getX

Defined in

src/shapes/Object/ObjectGeometry.ts:86

getXY()

getXY(): Point

Returns

Point

x position according to object’s originX originY properties in canvas coordinate plane

Inherited from

Polyline.getXY

Defined in

src/shapes/Object/ObjectGeometry.ts:146

getY()

getY(): number

Returns

number

y position according to object’s originY property in canvas coordinate plane

Inherited from

Polyline.getY

Defined in

src/shapes/Object/ObjectGeometry.ts:100

hasCommonAncestors()

hasCommonAncestors<T>(other): boolean

Type Parameters

• T extends Polygon

Parameters

• other: T

Returns

boolean

Inherited from

Polyline.hasCommonAncestors

Defined in

src/shapes/Object/Object.ts:1687

hasFill()

hasFill(): null | boolean | ""

return true if the object will draw a fill Does not consider text styles. This is just a shortcut used at rendering time We want it to be an approximation and be fast. wrote to avoid extra caching, it has to return true when fill happens, can guess when it will not happen at 100% chance, does not matter if it misses some use case where the fill is invisible.

Returns

null | boolean | ""

Boolean

Inherited from

Polyline.hasFill

Since

3.0.0

Defined in

src/shapes/Object/Object.ts:760

hasStroke()

hasStroke(): null | boolean | ""

return true if the object will draw a stroke Does not consider text styles. This is just a shortcut used at rendering time We want it to be an approximation and be fast. wrote to avoid extra caching, it has to return true when stroke happens, can guess when it will not happen at 100% chance, does not matter if it misses some use case where the stroke is invisible.

Returns

null | boolean | ""

Boolean

Inherited from

Polyline.hasStroke

Since

3.0.0

Defined in

src/shapes/Object/Object.ts:744

intersectsWithObject()

intersectsWithObject(other): boolean

Checks if object intersects with another object

Parameters

• other: ObjectGeometry<ObjectEvents>

Object to test

Returns

boolean

true if object intersects with another object

Inherited from

Polyline.intersectsWithObject

Defined in

src/shapes/Object/ObjectGeometry.ts:232

intersectsWithRect()

intersectsWithRect(tl, br): boolean

Checks if object intersects with the scene rect formed by tl and br

Parameters

• tl: Point

• br: Point

Returns

boolean

Inherited from

Polyline.intersectsWithRect

Defined in

src/shapes/Object/ObjectGeometry.ts:218

isCacheDirty()

isCacheDirty(skipCanvas): boolean

Check if cache is dirty

Parameters

• skipCanvas: boolean = false

skip canvas checks because this object is painted on parent canvas.

Returns

boolean

Inherited from

Polyline.isCacheDirty

Defined in

src/shapes/Object/Object.ts:905

isContainedWithinObject()

isContainedWithinObject(other): boolean

Checks if object is fully contained within area of another object

Parameters

• other: ObjectGeometry<ObjectEvents>

Object to test

Returns

boolean

true if object is fully contained within area of another object

Inherited from

Polyline.isContainedWithinObject

Defined in

src/shapes/Object/ObjectGeometry.ts:251

isContainedWithinRect()

isContainedWithinRect(tl, br): boolean

Checks if object is fully contained within the scene rect formed by tl and br

Parameters

• tl: Point

• br: Point

Returns

boolean

Inherited from

Polyline.isContainedWithinRect

Defined in

src/shapes/Object/ObjectGeometry.ts:259

isControlVisible()

isControlVisible(controlKey): boolean

Returns true if the specified control is visible, false otherwise.

Parameters

• controlKey: string

The key of the control. Possible values are usually ‘tl’, ‘tr’, ‘br’, ‘bl’, ‘ml’, ‘mt’, ‘mr’, ‘mb’, ‘mtr’, but since the control api allow for any control name, can be any string.

Returns

boolean

true if the specified control is visible, false otherwise

Inherited from

Polyline.isControlVisible

Defined in

src/shapes/Object/InteractiveObject.ts:584

isDescendantOf()

isDescendantOf(target): boolean

Checks if object is descendant of target Should be used instead of Group.contains or StaticCanvas.contains for performance reasons

Parameters

• target: TAncestor

Returns

boolean

Inherited from

Polyline.isDescendantOf

Defined in

src/shapes/Object/Object.ts:1591

isInFrontOf()

isInFrontOf<T>(other): undefined | boolean

Type Parameters

• T extends Polygon

Parameters

• other: T

object to compare against

Returns

undefined | boolean

if objects do not share a common ancestor or they are strictly equal it is impossible to determine which is in front of the other; in such cases the function returns undefined

Inherited from

Polyline.isInFrontOf

Defined in

src/shapes/Object/Object.ts:1697

isNotVisible()

isNotVisible(): boolean

Returns

boolean

Inherited from

Polyline.isNotVisible

Defined in

src/shapes/Object/Object.ts:669

isOnScreen()

isOnScreen(): boolean

Checks if object is contained within the canvas with current viewportTransform the check is done stopping at first point that appears on screen

Returns

boolean

true if object is fully or partially contained within canvas

Inherited from

Polyline.isOnScreen

Defined in

src/shapes/Object/ObjectGeometry.ts:291

isOverlapping()

isOverlapping<T>(other): boolean

Type Parameters

• T extends ObjectGeometry<ObjectEvents>

Parameters

• other: T

Returns

boolean

Inherited from

Polyline.isOverlapping

Defined in

src/shapes/Object/ObjectGeometry.ts:269

isPartiallyOnScreen()

isPartiallyOnScreen(): boolean

Checks if object is partially contained within the canvas with current viewportTransform

Returns

boolean

true if object is partially contained within canvas

Inherited from

Polyline.isPartiallyOnScreen

Defined in

src/shapes/Object/ObjectGeometry.ts:321

isType()

isType(…types): boolean

Returns true if any of the specified types is identical to the type of an instance

Parameters

• …types: string[]

Returns

boolean

Inherited from

Polyline.isType

Defined in

src/shapes/Object/Object.ts:1396

needsItsOwnCache()

needsItsOwnCache(): boolean

When set to true, force the object to have its own cache, even if it is inside a group it may be needed when your object behave in a particular way on the cache and always needs its own isolated canvas to render correctly. Created to be overridden since 1.7.12

Returns

boolean

Boolean

Inherited from

Polyline.needsItsOwnCache

Defined in

src/shapes/Object/Object.ts:772

off()

off(eventName)

off<K>(eventName): void

Unsubscribe all event listeners for eventname. Do not use this pattern. You could kill internal fabricJS events. We know we should have protected events for internal flows, but we don’t have yet

Type Parameters

• K extends keyof ObjectEvents

Parameters

• eventName: K

event name (eg. ‘after:render ’)

Returns

void

Inherited from

Polyline.off

Defined in

src/Observable.ts:122

off(eventName, handler)

off<K>(eventName, handler): void

unsubscribe an event listener

Type Parameters

• K extends keyof ObjectEvents

Parameters

• eventName: K

event name (eg. ‘after:render ’)

• handler: TEventCallback<any>

event listener to unsubscribe

Returns

void

Inherited from

Polyline.off

Defined in

src/Observable.ts:128

off(handlers)

off(handlers): void

unsubscribe event listeners

Parameters

• handlers: EventRegistryObject<ObjectEvents>

handlers key/value pairs (eg. {‘after:render ’: handler, ‘selection:cleared ’: handler})

Returns

void

Inherited from

Polyline.off

Defined in

src/Observable.ts:133

off()

off(): void

unsubscribe all event listeners

Returns

void

Inherited from

Polyline.off

Defined in

src/Observable.ts:137

on()

on(eventName, handler)

on<K, E>(eventName, handler): VoidFunction

Observes specified event

Type Parameters

• K extends keyof ObjectEvents

Parameters

• eventName: K

Event name (eg. ‘after:render ’)

• handler: TEventCallback<E>

Function that receives a notification when an event of the specified type occurs

Returns

VoidFunction

disposer

Inherited from

Polyline.on

Alias

Defined in

src/Observable.ts:23

on(handlers)

on(handlers): VoidFunction

Parameters

• handlers: EventRegistryObject<ObjectEvents>

Returns

VoidFunction

Inherited from

Polyline.on

Defined in

src/Observable.ts:27

onDeselect()

onDeselect(_options?): boolean

This callback function is called every time _discardActiveObject or _setActiveObject try to to deselect this object. If the function returns true, the process is cancelled

Parameters

• _options?

options sent from the upper functions

• _options.e?: TPointerEvent

• _options.object?: InteractiveFabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

Returns

boolean

Inherited from

Polyline.onDeselect

Defined in

src/shapes/Object/InteractiveObject.ts:658

onDragStart()

onDragStart(_e): boolean

Override to customize Drag behavior
Fired once a drag session has started

Parameters

• _e: DragEvent

Returns

boolean

true to handle the drag event

Inherited from

Polyline.onDragStart

Defined in

src/shapes/Object/InteractiveObject.ts:691

onSelect()

onSelect(_options?): boolean

This callback function is called every time _discardActiveObject or _setActiveObject try to to select this object. If the function returns true, the process is cancelled

Parameters

• _options?

options sent from the upper functions

• _options.e?: TPointerEvent

event if the process is generated by an event

Returns

boolean

Inherited from

Polyline.onSelect

Defined in

src/shapes/Object/InteractiveObject.ts:672

once()

once(eventName, handler)

once<K, E>(eventName, handler): VoidFunction

Observes specified event once

Type Parameters

• K extends keyof ObjectEvents

Parameters

• eventName: K

Event name (eg. ‘after:render ’)

• handler: TEventCallback<E>

Function that receives a notification when an event of the specified type occurs

Returns

VoidFunction

disposer

Inherited from

Polyline.once

Alias

once

Defined in

src/Observable.ts:62

once(handlers)

once(handlers): VoidFunction

Parameters

• handlers: EventRegistryObject<ObjectEvents>

Returns

VoidFunction

Inherited from

Polyline.once

Defined in

src/Observable.ts:66

render()

render(ctx): void

Renders an object on a specified context

Parameters

• ctx: CanvasRenderingContext2D

Context to render on

Returns

void

Inherited from

Polyline.render

Defined in

src/shapes/Object/Object.ts:681

renderCache()

renderCache(options?): void

Parameters

• options?: any

Returns

void

Inherited from

Polyline.renderCache

Defined in

src/shapes/Object/Object.ts:715

renderDragSourceEffect()

renderDragSourceEffect(_e): void

Override to customize drag and drop behavior render a specific effect when an object is the source of a drag event example: render the selection status for the part of text that is being dragged from a text object

Parameters

• _e: DragEvent

Returns

void

Inherited from

Polyline.renderDragSourceEffect

Defined in

src/shapes/Object/InteractiveObject.ts:712

renderDropTargetEffect()

renderDropTargetEffect(_e): void

Override to customize drag and drop behavior render a specific effect when an object is the target of a drag event used to show that the underly object can receive a drop, or to show how the object will change when dropping. example: show the cursor where the text is about to be dropped

Parameters

• _e: DragEvent

Returns

void

Inherited from

Polyline.renderDropTargetEffect

Defined in

src/shapes/Object/InteractiveObject.ts:724

rotate()

rotate(angle): void

Sets “angle” of an instance with centered rotation

Parameters

• angle: TDegree

Angle value (in degrees)

Returns

void

Inherited from

Polyline.rotate

Defined in

src/shapes/Object/Object.ts:1424

scale()

scale(value): void

Scales an object (equally by x and y)

Parameters

• value: number

Scale factor

Returns

void

Inherited from

Polyline.scale

Defined in

src/shapes/Object/ObjectGeometry.ts:370

scaleToHeight()

scaleToHeight(value): void

Scales an object to a given height, with respect to bounding box (scaling by x/y equally)

Parameters

• value: number

New height value

Returns

void

Inherited from

Polyline.scaleToHeight

Defined in

src/shapes/Object/ObjectGeometry.ts:393

scaleToWidth()

scaleToWidth(value): void

Scales an object to a given width, with respect to bounding box (scaling by x/y equally)

Parameters

• value: number

New width value

Returns

void

Inherited from

Polyline.scaleToWidth

Defined in

src/shapes/Object/ObjectGeometry.ts:381

set()

set(key, value?): Polygon

Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) set does not update position of object’s borders/controls. If you need to update those, call setCoords().

Parameters

• key: string | Record<string, any>

Property name or object (if object, iterate over the object properties)

• value?: any

Property value (if function, the value is passed into it and its return value is used as a new one)

Returns

Polygon

Inherited from

Polyline.set

Defined in

src/CommonMethods.ts:29

setBoundingBox()

setBoundingBox(adjustPosition?): void

Parameters

• adjustPosition?: boolean

Returns

void

Inherited from

Polyline.setBoundingBox

Defined in

src/shapes/Polyline.ts:214

setControlVisible()

setControlVisible(controlKey, visible): void

Sets the visibility of the specified control. please do not use.

Parameters

• controlKey: string

The key of the control. Possible values are ‘tl’, ‘tr’, ‘br’, ‘bl’, ‘ml’, ‘mt’, ‘mr’, ‘mb’, ‘mtr’. but since the control api allow for any control name, can be any string.

• visible: boolean

true to set the specified control visible, false otherwise

Returns

void

Inherited from

Polyline.setControlVisible

Todo

discuss this overlap of priority here with the team. Andrea Bogazzi for details

Defined in

src/shapes/Object/InteractiveObject.ts:599

setControlsVisibility()

setControlsVisibility(options?): void

Sets the visibility state of object controls, this is just a bulk option for setControlVisible;

Parameters

• options?: Record<string, boolean> = {}

with an optional key per control example: {Boolean} [options.bl] true to enable the bottom-left control, false to disable it

Returns

void

Inherited from

Polyline.setControlsVisibility

Defined in

src/shapes/Object/InteractiveObject.ts:611

setCoords()

setCoords(): void

set controls’ coordinates as well See https://github.com/fabricjs/fabric.js/wiki/When-to-call-setCoords and http://fabricjs.com/fabric-gotchas

Returns

void

Inherited from

Polyline.setCoords

Defined in

src/shapes/Object/InteractiveObject.ts:343

setDimensions()

setDimensions(): void

Returns

void

Inherited from

Polyline.setDimensions

Defined in

src/shapes/Polyline.ts:210

setOnGroup()

setOnGroup(): void

This callback function is called by the parent group of an object every time a non-delegated property changes on the group. It is passed the key and value as parameters. Not adding in this function’s signature to avoid Travis build error about unused variables.

Returns

void

Inherited from

Polyline.setOnGroup

Defined in

src/shapes/Object/Object.ts:1456

setPositionByOrigin()

setPositionByOrigin(pos, originX, originY): void

Sets the position of the object taking into consideration the object’s origin

Parameters

• pos: Point

The new position of the object

• originX: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• originY: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

void

Inherited from

Polyline.setPositionByOrigin

Defined in

src/shapes/Object/ObjectGeometry.ts:763

setRelativeX()

setRelativeX(value): void

Parameters

• value: number

x position according to object’s originX property in parent’s coordinate plane
if parent is canvas then this method is identical to setX

Returns

void

Inherited from

Polyline.setRelativeX

Defined in

src/shapes/Object/ObjectGeometry.ts:123

setRelativeXY()

setRelativeXY(point, originX?, originY?): void

As setXY, but in current parent’s coordinate plane (the current group if any or the canvas)

Parameters

• point: Point

position according to object’s originX originY properties in parent’s coordinate plane

• originX?: TOriginX = ...

Horizontal origin: ‘left’, ‘center’ or ‘right’

• originY?: TOriginY = ...

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

void

Inherited from

Polyline.setRelativeXY

Defined in

src/shapes/Object/ObjectGeometry.ts:186

setRelativeY()

setRelativeY(value): void

Parameters

• value: number

y position according to object’s originY property in parent’s coordinate plane
if parent is canvas then this property is identical to setY

Returns

void

Inherited from

Polyline.setRelativeY

Defined in

src/shapes/Object/ObjectGeometry.ts:139

setX()

setX(value): void

Parameters

• value: number

x position according to object’s originX property in canvas coordinate plane

Returns

void

Inherited from

Polyline.setX

Defined in

src/shapes/Object/ObjectGeometry.ts:93

setXY()

setXY(point, originX?, originY?): void

Set an object position to a particular point, the point is intended in absolute ( canvas ) coordinate. You can specify originX and originY values, that otherwise are the object’s current values.

Parameters

• point: Point

position in scene coordinate plane

• originX?: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• originY?: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

void

Inherited from

Polyline.setXY

Example

object.setXY(new Point(5, 5), 'left', 'bottom').

Defined in

src/shapes/Object/ObjectGeometry.ts:163

setY()

setY(value): void

Parameters

• value: number

y position according to object’s originY property in canvas coordinate plane

Returns

void

Inherited from

Polyline.setY

Defined in

src/shapes/Object/ObjectGeometry.ts:107

shouldCache()

shouldCache(): boolean

Decide if the object should cache or not. Create its own cache level objectCaching is a global flag, wins over everything needsItsOwnCache should be used when the object drawing method requires a cache step. None of the fabric classes requires it. Generally you do not cache objects in groups because the group outside is cached. Read as: cache if is needed, or if the feature is enabled but we are not already caching.

Returns

boolean

Inherited from

Polyline.shouldCache

Defined in

src/shapes/Object/Object.ts:796

shouldStartDragging()

shouldStartDragging(_e): boolean

Override to customize Drag behavior Fired from Canvas#_onMouseMove

Parameters

• _e: TPointerEvent

Returns

boolean

true in order for the window to start a drag session

Inherited from

Polyline.shouldStartDragging

Defined in

src/shapes/Object/InteractiveObject.ts:682

strokeBorders()

strokeBorders(ctx, size): void

override this function in order to customize the drawing of the control box, e.g. rounded corners, different border style.

Parameters

• ctx: CanvasRenderingContext2D

ctx is rotated and translated so that (0,0) is at object’s center

• size: Point

the control box size used

Returns

void

Inherited from

Polyline.strokeBorders

Defined in

src/shapes/Object/InteractiveObject.ts:399

toCanvasElement()

toCanvasElement(options): HTMLCanvasElement

Converts an object into a HTMLCanvas element

Parameters

• options: ObjectToCanvasElementOptions = {}

Options object

Returns

HTMLCanvasElement

Returns DOM element

Inherited from

Polyline.toCanvasElement

Defined in

src/shapes/Object/Object.ts:1287

toClipPathSVG()

toClipPathSVG(this, reviver?): string

Returns svg clipPath representation of an instance

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

• reviver?: TSVGReviver

Method for further parsing of svg representation.

Returns

string

svg representation of an instance

Inherited from

Polyline.toClipPathSVG

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:143

toDataURL()

toDataURL(options): string

Converts an object into a data-url-like string

Parameters

• options: toDataURLOptions = {}

Options object

Returns

string

Returns a data: URL containing a representation of the object in the format specified by options.format

Inherited from

Polyline.toDataURL

Defined in

src/shapes/Object/Object.ts:1383

toDatalessObject()

toDatalessObject(propertiesToInclude?): any

Returns (dataless) object representation of an instance

Parameters

• propertiesToInclude?: any[]

Any properties that you might want to additionally include in the output

Returns

any

Object representation of an instance

Inherited from

Polyline.toDatalessObject

Defined in

src/shapes/Object/Object.ts:1831

toJSON()

toJSON(): any

Returns a JSON representation of an instance

Returns

any

JSON

Inherited from

Polyline.toJSON

Defined in

src/shapes/Object/Object.ts:1415

toObject()

toObject<T, K>(propertiesToInclude?): Pick<T, K> & SerializedPolylineProps

Returns object representation of an instance

Type Parameters

• T extends Omit<Partial<FabricObjectProps> & TClassProperties<Polygon>, keyof SerializedPolylineProps>

• K extends string | number | symbol = never

Parameters

• propertiesToInclude?: K[] = []

Any properties that you might want to additionally include in the output

Returns

Pick<T, K> & SerializedPolylineProps

Object representation of an instance

Inherited from

Polyline.toObject

Defined in

src/shapes/Polyline.ts:311

toSVG()

toSVG(this, reviver?): string

Returns svg representation of an instance

Parameters

• this: FabricObjectSVGExportMixin & FabricObject<Partial<FabricObjectProps>, SerializedObjectProps, ObjectEvents>

• reviver?: TSVGReviver

Method for further parsing of svg representation.

Returns

string

svg representation of an instance

Inherited from

Polyline.toSVG

Defined in

src/shapes/Object/FabricObjectSVGExportMixin.ts:129

toString()

toString(): string

Returns a string representation of an instance

Returns

string

Inherited from

Polyline.toString

Defined in

src/shapes/Object/Object.ts:1871

toggle()

toggle(property): Polygon

Toggles specified property from true to false or from false to true

Parameters

• property: string

Property to toggle

Returns

Polygon

Inherited from

Polyline.toggle

Defined in

src/CommonMethods.ts:46

transform()

transform(ctx): void

Transforms context when rendering an object

Parameters

• ctx: CanvasRenderingContext2D

Context

Returns

void

Inherited from

Polyline.transform

Defined in

src/shapes/Object/Object.ts:547

transformMatrixKey()

transformMatrixKey(skipGroup): number[]

Parameters

• skipGroup: boolean = false

Returns

number[]

Inherited from

Polyline.transformMatrixKey

Defined in

src/shapes/Object/ObjectGeometry.ts:453

translateToCenterPoint()

translateToCenterPoint(point, originX, originY): Point

Translates the coordinates from origin to center coordinates (based on the object’s dimensions)

Parameters

• point: Point

The point which corresponds to the originX and originY params

• originX: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• originY: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

Point

Inherited from

Polyline.translateToCenterPoint

Defined in

src/shapes/Object/ObjectGeometry.ts:676

translateToGivenOrigin()

translateToGivenOrigin(point, fromOriginX, fromOriginY, toOriginX, toOriginY): Point

Translates the coordinates from a set of origin to another (based on the object’s dimensions)

Parameters

• point: Point

The point which corresponds to the originX and originY params

• fromOriginX: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• fromOriginY: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

• toOriginX: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• toOriginY: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

Point

Inherited from

Polyline.translateToGivenOrigin

Defined in

src/shapes/Object/ObjectGeometry.ts:648

translateToOriginPoint()

translateToOriginPoint(center, originX, originY): Point

Translates the coordinates from center to origin coordinates (based on the object’s dimensions)

Parameters

• center: Point

The point which corresponds to center of the object

• originX: TOriginX

Horizontal origin: ‘left’, ‘center’ or ‘right’

• originY: TOriginY

Vertical origin: ‘top’, ‘center’ or ‘bottom’

Returns

Point

Inherited from

Polyline.translateToOriginPoint

Defined in

src/shapes/Object/ObjectGeometry.ts:701

willDrawShadow()

willDrawShadow(): boolean

Check if this object will cast a shadow with an offset. used by Group.shouldCache to know if child has a shadow recursively

Returns

boolean

Inherited from

Polyline.willDrawShadow

Defined in

src/shapes/Object/Object.ts:809

_fromObject()

static _fromObject<S>(__namedParameters, __namedParameters): Promise<S>

Type Parameters

• S extends BaseFabricObject<Partial<ObjectProps>, SerializedObjectProps, ObjectEvents>

Parameters

• __namedParameters: Record<string, unknown>

• __namedParameters: Abortable & object = {}

Returns

Promise<S>

Inherited from

Polyline._fromObject

Defined in

src/shapes/Object/Object.ts:1884

createControls()

static createControls(): object

Creates the default control object. If you prefer to have on instance of controls shared among all objects make this function return an empty object and add controls to the ownDefaults