Class: Triangle

fabric.Triangle

new Triangle() → {fabric.Triangle}

Triangle class
Source:
See:
Returns:
thisArg
Type
fabric.Triangle

Extends

Members

__corner :number|string|any

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.
Type:
  • number | string | any
Inherited From:
Default Value:
  • 0
Source:

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
Type:
  • boolean
Inherited From:
Default Value:
  • false
Source:

aCoords

Describe object's corner position in canvas object absolute coordinates properties are tl,tr,bl,br and describe the four main corner. each property is an object with x, y, instance of Fabric.Point. The coordinates depends from this properties: width, height, scaleX, scaleY skewX, skewY, angle, strokeWidth, top, left. Those coordinates are useful to understand where an object is. They get updated with oCoords but they do not need to be updated when zoom or panning change. The coordinates get updated with @method setCoords. You can calculate them without updating with @method calcACoords();
Inherited From:
Source:

angle :Number

Angle of rotation of an object (in degrees)
Type:
  • Number
Inherited From:
Source:

backgroundColor :String

Background color of an object. takes css colors https://www.w3.org/TR/css-color-3/
Type:
  • String
Inherited From:
Source:

borderColor :String

Color of controlling borders of an object (when it's active)
Type:
  • String
Inherited From:
Default Value:
  • rgb(178,204,255)
Source:

borderDashArray :Array

Array specifying dash pattern of an object's borders (hasBorder must be true)
Type:
  • Array
Since:
  • 1.6.2
Inherited From:
Source:

borderOpacityWhenMoving :Number

Opacity of object's controlling borders when object is active and moving
Type:
  • Number
Inherited From:
Default Value:
  • 0.4
Source:

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.
Type:
  • Number
Inherited From:
Default Value:
  • 1
Source:

cacheProperties :Array

List of properties to consider when checking if cache needs refresh Those properties are checked by statefullCache ON ( or lazy mode if we want ) or from single 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
Type:
  • Array
Inherited From:
Source:

centeredRotation :Boolean

When true, this object will use center point as the origin of transformation when being rotated via the controls. Backwards incompatibility note: This property replaces "centerTransform" (Boolean).
Type:
  • Boolean
Since:
  • 1.3.4
Inherited From:
Default Value:
  • true
Source:

centeredScaling :Boolean

When true, this object will use center point as the origin of transformation when being scaled via the controls. Backwards incompatibility note: This property replaces "centerTransform" (Boolean).
Type:
  • Boolean
Since:
  • 1.3.4
Inherited From:
Source:

clipPath :fabric.Object

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'
Type:
Inherited From:
Source:

colorProperties :Array

List of properties to consider for animating colors.
Type:
  • Array
Inherited From:
Source:

controls

custom controls interface controls are added by default_controls.js
Inherited From:
Source:

cornerColor :String

Color of controlling corners of an object (when it's active)
Type:
  • String
Inherited From:
Default Value:
  • rgb(178,204,255)
Source:

cornerDashArray :Array

Array specifying dash pattern of an object's control (hasBorder must be true)
Type:
  • Array
Since:
  • 1.6.2
Inherited From:
Source:

cornerSize :Number

Size of object's controlling corners (in pixels)
Type:
  • Number
Inherited From:
Default Value:
  • 13
Source:

cornerStrokeColor :String

Color of controlling corners of an object (when it's active and transparentCorners false)
Type:
  • String
Since:
  • 1.6.2
Inherited From:
Source:

cornerStyle :String

Specify style of control, 'rect' or 'circle'
Type:
  • String
Since:
  • 1.6.2
Inherited From:
Source:

dirty :Boolean

When set to `true`, object's cache will be rerendered next render call. since 1.7.0
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

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
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

excludeFromExport :Boolean

When `true`, object is not exported in OBJECT/JSON
Type:
  • Boolean
Since:
  • 1.6.3
Inherited From:
Source:

fill :String

Color of object's fill takes css colors https://www.w3.org/TR/css-color-3/
Type:
  • String
Inherited From:
Default Value:
  • rgb(0,0,0)
Source:

fillRule :String

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 `fabric.Object#globalCompositeOperation` instead)
Type:
  • String
Inherited From:
Default Value:
  • nonzero
Source:

flipX :Boolean

When true, an object is rendered as flipped horizontally
Type:
  • Boolean
Inherited From:
Source:

flipY :Boolean

When true, an object is rendered as flipped vertically
Type:
  • Boolean
Inherited From:
Source:

globalCompositeOperation :String

Composite rule used for canvas globalCompositeOperation
Type:
  • String
Inherited From:
Default Value:
  • source-over
Source:

hasBorders :Boolean

When set to `false`, object's controlling borders are not rendered
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

hasControls :Boolean

When set to `false`, object's controls are not displayed and can not be used to manipulate object
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

height :Number

Height is set to 100 to compensate the old initialize code that was setting it to 100
Type:
  • Number
Overrides:
Default Value:
  • 100
Source:

hoverCursor :String

Default cursor value used when hovering over this object on canvas
Type:
  • String
Inherited From:
Source:

includeDefaultValues :Boolean

When `false`, default object's values are not included in its serialization
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

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
Type:
  • boolean
Inherited From:
Default Value:
  • false
Source:

left :Number

Left position of an object. Note that by default it's relative to object left. You can change this by setting originX={left/center/right}
Type:
  • Number
Inherited From:
Source:

lineCoords

Describe object's corner position in canvas element coordinates. includes padding. Used of object detection. set and refreshed with setCoords.
Inherited From:
Source:

lockMovementX :Boolean

When `true`, object horizontal movement is locked
Type:
  • Boolean
Inherited From:
Source:

lockMovementY :Boolean

When `true`, object vertical movement is locked
Type:
  • Boolean
Inherited From:
Source:

lockRotation :Boolean

When `true`, object rotation is locked
Type:
  • Boolean
Inherited From:
Source:

lockScalingFlip :Boolean

When `true`, object cannot be flipped by scaling into negative values
Type:
  • Boolean
Inherited From:
Source:

lockScalingX :Boolean

When `true`, object horizontal scaling is locked
Type:
  • Boolean
Inherited From:
Source:

lockScalingY :Boolean

When `true`, object vertical scaling is locked
Type:
  • Boolean
Inherited From:
Source:

lockSkewingX :Boolean

When `true`, object horizontal skewing is locked
Type:
  • Boolean
Inherited From:
Source:

lockSkewingY :Boolean

When `true`, object vertical skewing is locked
Type:
  • Boolean
Inherited From:
Source:

matrixCache

storage for object full transform matrix
Inherited From:
Source:

minScaleLimit :Number

Minimum allowed scale value of an object
Type:
  • Number
Inherited From:
Source:

moveCursor :String

Default cursor value used when moving this object on canvas
Type:
  • String
Inherited From:
Source:

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
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

objectCaching :Boolean

When `true`, object is cached on an additional canvas. When `false`, object is not cached unless necessary ( clipPath ) default to true
Type:
  • Boolean
Since:
  • 1.7.0
Inherited From:
Default Value:
  • true
Source:

oCoords

Describe object's corner position in canvas element coordinates. properties are depending on control keys and padding the main controls. each property is an object with x, y and corner. The `corner` property contains in a similar manner the 4 points of the interactive area of the corner. The coordinates depends from the controls positionHandler and are used to draw and locate controls
Inherited From:
Source:

opacity :Number

Opacity of an object
Type:
  • Number
Inherited From:
Default Value:
  • 1
Source:

originX :String

Horizontal origin of transformation of an object (one of "left", "right", "center") See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups
Type:
  • String
Inherited From:
Default Value:
  • left
Source:

originY :String

Vertical origin of transformation of an object (one of "top", "bottom", "center") See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups
Type:
  • String
Inherited From:
Default Value:
  • top
Source:

ownMatrixCache

storage for object transform matrix
Inherited From:
Source:

padding :Number

Padding between object and its controlling borders (in pixels)
Type:
  • Number
Inherited From:
Source:

paintFirst :String

Determines if the fill or the stroke is drawn first (one of "fill" or "stroke")
Type:
  • String
Inherited From:
Default Value:
  • fill
Source:

perPixelTargetFind :Boolean

When set to `true`, objects are "found" on canvas on per-pixel basis rather than according to bounding box
Type:
  • Boolean
Inherited From:
Source:

scaleX :Number

Object scale factor (horizontal)
Type:
  • Number
Inherited From:
Default Value:
  • 1
Source:

scaleY :Number

Object scale factor (vertical)
Type:
  • Number
Inherited From:
Default Value:
  • 1
Source:

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.
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

selectionBackgroundColor :String

Selection Background color of an object. colored layer behind the object when it is active. does not mix good with globalCompositeOperation methods.
Type:
  • String
Inherited From:
Source:

shadow :fabric.Shadow

Shadow object representing shadow of this shape
Type:
Inherited From:
Source:

skewX :Number

Angle of skew on x axes of an object (in degrees)
Type:
  • Number
Inherited From:
Source:

skewY :Number

Angle of skew on y axes of an object (in degrees)
Type:
  • Number
Inherited From:
Source:

statefullCache :Boolean

When `true`, object properties are checked for cache invalidation. In some particular situation you may want this to be disabled ( spray brush, very big, groups) or if your application does not allow you to modify properties for groups child you want to disable it for groups. default to false since 1.7.0
Type:
  • Boolean
Inherited From:
Default Value:
  • false
Source:

stateProperties :Array

List of properties to consider when checking if state of an object is changed (fabric.Object#hasStateChanged) as well as for history (undo/redo) purposes
Type:
  • Array
Inherited From:
Source:

stroke :String

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/
Type:
  • String
Inherited From:
Source:

strokeDashArray :Array

Array specifying dash pattern of an object's stroke (stroke must be defined)
Type:
  • Array
Inherited From:
Source:

strokeDashOffset :Number

Line offset of an object's stroke
Type:
  • Number
Inherited From:
Source:

strokeLineCap :String

Line endings style of an object's stroke (one of "butt", "round", "square")
Type:
  • String
Inherited From:
Default Value:
  • butt
Source:

strokeLineJoin :String

Corner style of an object's stroke (one of "bevel", "round", "miter")
Type:
  • String
Inherited From:
Default Value:
  • miter
Source:

strokeMiterLimit :Number

Maximum miter length (used for strokeLineJoin = "miter") of an object's stroke
Type:
  • Number
Inherited From:
Default Value:
  • 4
Source:

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
Type:
  • Boolean
Since:
  • 2.6.0
Inherited From:
Default Value:
  • false
Source:

strokeWidth :Number

Width of a stroke used to render this object
Type:
  • Number
Inherited From:
Default Value:
  • 1
Source:

top :Number

Top position of an object. Note that by default it's relative to object top. You can change this by setting originY={top/center/bottom}
Type:
  • Number
Inherited From:
Source:

touchCornerSize :Number

Size of object's controlling corners when touch interaction is detected
Type:
  • Number
Inherited From:
Default Value:
  • 24
Source:

transparentCorners :Boolean

When true, object's controlling corners are rendered as transparent inside (i.e. stroke instead of fill)
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

type :String

Type of an object
Type:
  • String
Overrides:
Default Value:
  • triangle
Source:

visible :Boolean

When set to `false`, an object is not rendered on canvas
Type:
  • Boolean
Inherited From:
Default Value:
  • true
Source:

width :Number

Width is set to 100 to compensate the old initialize code that was setting it to 100
Type:
  • Number
Overrides:
Default Value:
  • 100
Source:

Methods

(static) fromObject(object, callbackopt)

Returns fabric.Triangle instance from an object representation
Parameters:
Name Type Attributes Description
object Object Object to create an instance from
callback function <optional>
 invoked with new instance as first argument
Source:

_calcRotateMatrix() → {Array}

calculate rotation matrix of an object
Inherited From:
Source:
Returns:
rotation matrix for the object
Type
Array

_calcTranslateMatrix() → {Array}

calculate the translation matrix for an object transform
Inherited From:
Source:
Returns:
rotation matrix for the object
Type
Array

_drawClipPath(ctx, clipPath)

Prepare clipPath state and cache and draw it on instance's cache
Parameters:
Name Type Description
ctx CanvasRenderingContext2D
clipPath fabric.Object
Inherited From:
Source:

_getCoords(absolute) → {Object}

return correct set of coordinates for intersection this will return either aCoords or lineCoords.
Parameters:
Name Type Description
absolute Boolean will return aCoords if true or lineCoords
Inherited From:
Source:
Returns:
{tl, tr, br, bl} points
Type
Object

_limitCacheSize(dims) → {Object|Object|Object|Object}

Limit the cache dimensions so that X * Y do not cross fabric.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:
Name Type Description
dims Object
Properties
Name Type Description
width Object width of canvas
height Object height of canvas
zoomX Object zoomX zoom value to unscale the canvas before drawing cache
zoomY Object zoomY zoom value to unscale the canvas before drawing cache
Inherited From:
Source:
Returns:
  • .width width of canvas
    Type
    Object
  • .height height of canvas
    Type
    Object
  • .zoomX zoomX zoom value to unscale the canvas before drawing cache
    Type
    Object
  • .zoomY zoomY zoom value to unscale the canvas before drawing cache
    Type
    Object

_removeCacheCanvas()

Remove cacheCanvas and its dimensions from the objects
Inherited From:
Source:

_renderControls(ctx, styleOverrideopt)

Renders controls and borders for the object the context here is not transformed
Parameters:
Name Type Attributes Description
ctx CanvasRenderingContext2D Context to render on
styleOverride Object <optional>
 properties to override the object style
Inherited From:
Source:

_setupCompositeOperation(ctx)

Sets canvas globalCompositeOperation for specific object custom composition operation for the particular object can be specified using globalCompositeOperation property
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Rendering canvas context
Inherited From:
Source:

_toSVG() → {Array}

Returns svg representation of an instance
Source:
Returns:
an array of strings with the specific svg representation of the instance
Type
Array

adjustPosition(to)

Parameters:
Name Type Description
to String One of 'left', 'center', 'right'
Inherited From:
Source:

animate(property, value) → {fabric.Object|fabric.AnimationContext|Array.<fabric.AnimationContext>}

Animates object's properties
Parameters:
Name Type Description
property String | Object Property to animate (if string) or properties to animate (if object)
value Number | Object Value to animate property to (if string was given first) or options object
Inherited From:
Source:
Tutorials:
Returns:
  • thisArg
    Type
    fabric.Object
  • animation context (or an array if passed multiple properties) As object — multiple properties object.animate({ left: ..., top: ... }); object.animate({ left: ..., top: ... }, { duration: ... }); As string — one property object.animate('left', ...); object.animate('left', { duration: ... });
    Type
    fabric.AnimationContext | Array.<fabric.AnimationContext>

bringForward(intersectingopt) → {fabric.Object}

Moves an object up in stack of drawn objects
Parameters:
Name Type Attributes Description
intersecting Boolean <optional>
 If `true`, send object in front of next upper intersecting object
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

bringToFront() → {fabric.Object}

Moves an object to the top of the stack of drawn objects
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

calcOwnMatrix() → {Array}

calculate transform matrix that represents the current transformations from the object's properties, this matrix does not include the group transformation
Inherited From:
Source:
Returns:
transform matrix for the object
Type
Array

calcTransformMatrix(skipGroupopt) → {Array}

calculate transform matrix that represents the current transformations from the object's properties.
Parameters:
Name Type Attributes Description
skipGroup Boolean <optional>
 return transform matrix for object not counting parent transformations There are some situation in which this is useful to avoid the fake rotation.
Inherited From:
Source:
Returns:
transform matrix for the object
Type
Array

center() → {fabric.Object}

Centers object vertically and horizontally on canvas to which is was added last You might need to call `setCoords` on an object after centering, to update controls area.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

centerH() → {fabric.Object}

Centers object horizontally on canvas to which it was added last. You might need to call `setCoords` on an object after centering, to update controls area.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

centerV() → {fabric.Object}

Centers object vertically on canvas to which it was added last. You might need to call `setCoords` on an object after centering, to update controls area.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

clone(callback, propertiesToIncludeopt)

Clones an instance, using a callback method will work for every object.
Parameters:
Name Type Attributes Description
callback function Callback is invoked with a clone as a first argument
propertiesToInclude Array <optional>
 Any properties that you might want to additionally include in the output
Inherited From:
Source:

cloneAsImage(callback, optionsopt) → {fabric.Object}

Creates an instance of fabric.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. This method is sync now, but still support the callback because we did not want to break. When fabricJS 5.0 will be planned, this will probably be changed to not have a callback.
Parameters:
Name Type Attributes Description
callback function callback, invoked with an instance as a first argument
options Object <optional>
 for clone as image, passed to toDataURL
Properties
Name Type Attributes Default Description
multiplier Number <optional>
 1 Multiplier to scale by
left Number <optional>
 Cropping left offset. Introduced in v1.2.14
top Number <optional>
 Cropping top offset. Introduced in v1.2.14
width Number <optional>
 Cropping width. Introduced in v1.2.14
height Number <optional>
 Cropping height. Introduced in v1.2.14
enableRetinaScaling Boolean <optional>
 Enable retina scaling for clone image. Introduce in 1.6.4
withoutTransform Boolean <optional>
 Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4
withoutShadow Boolean <optional>
 Remove current object shadow. Introduced in 2.4.2
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

complexity() → {Number}

Returns complexity of an instance
Inherited From:
Source:
Returns:
complexity of this instance (is 1 unless subclassed)
Type
Number

containsPoint(point, linesopt, absoluteopt, calculateopt) → {Boolean}

Checks if point is inside the object
Parameters:
Name Type Attributes Description
point fabric.Point Point to check against
lines Object <optional>
 object returned from @method _getImageLines
absolute Boolean <optional>
 use coordinates without viewportTransform
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords
Inherited From:
Source:
Returns:
true if point is inside the object
Type
Boolean

dispose()

cancel instance's running animations
Inherited From:
Source:

drawBorders(ctx, styleOverride) → {fabric.Object}

Draws borders of an object's bounding box. Requires public properties: width, height Requires public options: padding, borderColor
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to draw on
styleOverride Object object to override the object style
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

drawBordersInGroup(ctx, options, styleOverride) → {fabric.Object}

Draws borders of an object's bounding box when it is inside a group. Requires public properties: width, height Requires public options: padding, borderColor
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to draw on
options object object representing current object parameters
styleOverride Object object to override the object style
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

drawCacheOnCanvas(ctx)

Paint the cached copy of the object on the target context.
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to render on
Inherited From:
Source:

drawClipPathOnCache(ctx, clipPath)

Execute the drawing operation for an object clipPath
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to render on
clipPath fabric.Object
Inherited From:
Source:

drawControls(ctx, styleOverride) → {fabric.Object}

Draws corners of an object's bounding box. Requires public properties: width, height Requires public options: cornerSize, padding
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to draw on
styleOverride Object object to override the object style
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

drawObject(ctx)

Execute the drawing operation for an object on a specified context
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to render on
Inherited From:
Source:

drawSelectionBackground(ctx) → {fabric.Object}

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:
Name Type Description
ctx CanvasRenderingContext2D Context to draw on
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

forEachControl(fn)

Calls a function for each control. The function gets called, with the control, the object that is calling the iterator and the control's key
Parameters:
Name Type Description
fn function function to iterate over the controls over
Inherited From:
Source:

fxStraighten(callbacks) → {fabric.Object}

Same as fabric.Object.prototype.straighten but with animation
Parameters:
Name Type Description
callbacks Object Object with callback functions
Properties
Name Type Attributes Description
onComplete function <optional>
 Invoked on completion
onChange function <optional>
 Invoked on every step of animation
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

getBoundingRect(absoluteopt, calculateopt) → {Object}

Returns coordinates of object's bounding rectangle (left, top, width, height) the box is intended as aligned to axis of canvas.
Parameters:
Name Type Attributes Description
absolute Boolean <optional>
 use coordinates without viewportTransform
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords / .aCoords
Inherited From:
Source:
Returns:
Object with left, top, width, height properties
Type
Object

getCenterPoint() → {fabric.Point}

Returns the real center coordinates of the object
Inherited From:
Source:
Returns:
Type
fabric.Point

getCoords() → {Array}

return correct set of coordinates for intersection this will return either aCoords or lineCoords. The coords are returned in an array.
Inherited From:
Source:
Returns:
[tl, tr, br, bl] of points
Type
Array

getLocalPointer(e, pointeropt) → {Object}

Returns coordinates of a pointer relative to an object
Parameters:
Name Type Attributes Description
e Event Event to operate upon
pointer Object <optional>
 Pointer to operate upon (instead of event)
Inherited From:
Source:
Returns:
Coordinates of a pointer (x, y)
Type
Object

getObjectOpacity() → {Number}

Return the object opacity counting also the group property
Inherited From:
Source:
Returns:
Type
Number

getObjectScaling() → {Object}

Return the object scale factor counting also the group scaling
Inherited From:
Source:
Returns:
object with scaleX and scaleY properties
Type
Object

getPointByOrigin(originX, originY) → {fabric.Point}

Returns the coordinates of the object as if it has a different origin
Parameters:
Name Type Description
originX String Horizontal origin: 'left', 'center' or 'right'
originY String Vertical origin: 'top', 'center' or 'bottom'
Inherited From:
Source:
Returns:
Type
fabric.Point

getScaledHeight() → {Number}

Returns height of an object bounding box counting transformations before 2.0 it was named getHeight();
Inherited From:
Source:
Returns:
height value
Type
Number

getScaledWidth() → {Number}

Returns width of an object's bounding box counting transformations before 2.0 it was named getWidth();
Inherited From:
Source:
Returns:
width value
Type
Number

getSvgCommons() → {String}

Returns id attribute for svg output
Inherited From:
Source:
Returns:
Type
String

getSvgFilter() → {String}

Returns filter for svg shadow
Inherited From:
Source:
Returns:
Type
String

getSvgSpanStyles(style, useWhiteSpace) → {String}

Returns styles-string for svg-export
Parameters:
Name Type Description
style Object the object from which to retrieve style properties
useWhiteSpace Boolean a boolean to include an additional attribute in the style.
Inherited From:
Source:
Returns:
Type
String

getSvgStyles(skipShadow) → {String}

Returns styles-string for svg-export
Parameters:
Name Type Description
skipShadow Boolean a boolean to skip shadow filter output
Inherited From:
Source:
Returns:
Type
String

getSvgTextDecoration(style) → {String}

Returns text-decoration property for svg-export
Parameters:
Name Type Description
style Object the object from which to retrieve style properties
Inherited From:
Source:
Returns:
Type
String

getSvgTransform(use) → {String}

Returns transform-string for svg-export
Parameters:
Name Type Description
use Boolean the full transform or the single object one.
Inherited From:
Source:
Returns:
Type
String

getTotalObjectScaling() → {Object}

Return the object scale factor counting also the group scaling, zoom and retina
Inherited From:
Source:
Returns:
object with scaleX and scaleY properties
Type
Object

getViewportTransform() → {Array}

Retrieves viewportTransform from Object's canvas if possible
Inherited From:
Source:
Returns:
Type
Array

hasFill()

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.
Since:
  • 3.0.0
Inherited From:
Source:
Returns:
Boolean

hasStateChanged(propertySetopt) → {Boolean}

Returns true if object state (one of its state properties) was changed
Parameters:
Name Type Attributes Description
propertySet String <optional>
 optional name for the set of property we want to save
Inherited From:
Source:
Returns:
true if instance' state has changed since `fabric.Object#saveState` was called
Type
Boolean

hasStroke()

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.
Since:
  • 3.0.0
Inherited From:
Source:
Returns:
Boolean

initialize(optionsopt)

Constructor
Parameters:
Name Type Attributes Description
options Object <optional>
 Options object
Inherited From:
Source:

intersectsWithObject(other, absoluteopt, calculateopt) → {Boolean}

Checks if object intersects with another object
Parameters:
Name Type Attributes Description
other Object Object to test
absolute Boolean <optional>
 use coordinates without viewportTransform
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords
Inherited From:
Source:
Returns:
true if object intersects with another object
Type
Boolean

intersectsWithRect(pointTL, pointBR, absoluteopt, calculateopt) → {Boolean}

Checks if object intersects with an area formed by 2 points
Parameters:
Name Type Attributes Description
pointTL Object top-left point of area
pointBR Object bottom-right point of area
absolute Boolean <optional>
 use coordinates without viewportTransform
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords
Inherited From:
Source:
Returns:
true if object intersects with an area formed by 2 points
Type
Boolean

isCacheDirty(skipCanvas)

Check if cache is dirty
Parameters:
Name Type Description
skipCanvas Boolean skip canvas checks because this object is painted on parent canvas.
Inherited From:
Source:

isContainedWithinObject(other, absoluteopt, calculateopt) → {Boolean}

Checks if object is fully contained within area of another object
Parameters:
Name Type Attributes Description
other Object Object to test
absolute Boolean <optional>
 use coordinates without viewportTransform
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords
Inherited From:
Source:
Returns:
true if object is fully contained within area of another object
Type
Boolean

isContainedWithinRect(pointTL, pointBR, absoluteopt, calculateopt) → {Boolean}

Checks if object is fully contained within area formed by 2 points
Parameters:
Name Type Attributes Description
pointTL Object top-left point of area
pointBR Object bottom-right point of area
absolute Boolean <optional>
 use coordinates without viewportTransform
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords
Inherited From:
Source:
Returns:
true if object is fully contained within area formed by 2 points
Type
Boolean

isControlVisible(controlKey) → {Boolean}

Returns true if the specified control is visible, false otherwise.
Parameters:
Name Type Description
controlKey String The key of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'.
Inherited From:
Source:
Returns:
true if the specified control is visible, false otherwise
Type
Boolean

isOnScreen(calculateopt) → {Boolean}

Checks if object is contained within the canvas with current viewportTransform the check is done stopping at first point that appears on screen
Parameters:
Name Type Attributes Description
calculate Boolean <optional>
 use coordinates of current position instead of .aCoords
Inherited From:
Source:
Returns:
true if object is fully or partially contained within canvas
Type
Boolean

isPartiallyOnScreen(calculateopt) → {Boolean}

Checks if object is partially contained within the canvas with current viewportTransform
Parameters:
Name Type Attributes Description
calculate Boolean <optional>
 use coordinates of current position instead of .oCoords
Inherited From:
Source:
Returns:
true if object is partially contained within canvas
Type
Boolean

isType(type) → {Boolean}

Returns true if specified type is identical to the type of an instance
Parameters:
Name Type Description
type String Type to check against
Inherited From:
Source:
Returns:
Type
Boolean

moveTo(index) → {fabric.Object}

Moves an object to specified level in stack of drawn objects
Parameters:
Name Type Description
index Number New position of object
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

needsItsOwnCache()

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
Inherited From:
Source:
Returns:
Boolean

onDeselect(optionsopt)

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:
Name Type Attributes Description
options Object <optional>
 options sent from the upper functions
Properties
Name Type Attributes Description
e Event <optional>
 event if the process is generated by an event
Inherited From:
Source:

onSelect(optionsopt)

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:
Name Type Attributes Description
options Object <optional>
 options sent from the upper functions
Properties
Name Type Attributes Description
e Event <optional>
 event if the process is generated by an event
Inherited From:
Source:

render(ctx)

Renders an object on a specified context
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context to render on
Inherited From:
Source:

rotate(angle) → {fabric.Object}

Sets "angle" of an instance with centered rotation
Parameters:
Name Type Description
angle Number Angle value (in degrees)
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

saveState(optionsopt) → {fabric.Object}

Saves state of an object
Parameters:
Name Type Attributes Description
options Object <optional>
 Object with additional `stateProperties` array to include when saving state
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

scale(value) → {fabric.Object}

Scales an object (equally by x and y)
Parameters:
Name Type Description
value Number Scale factor
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

scaleToHeight(value, absolute) → {fabric.Object}

Scales an object to a given height, with respect to bounding box (scaling by x/y equally)
Parameters:
Name Type Description
value Number New height value
absolute Boolean ignore viewport
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

scaleToWidth(value, absolute) → {fabric.Object}

Scales an object to a given width, with respect to bounding box (scaling by x/y equally)
Parameters:
Name Type Description
value Number New width value
absolute Boolean ignore viewport
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

sendBackwards(intersectingopt) → {fabric.Object}

Moves an object down in stack of drawn objects
Parameters:
Name Type Attributes Description
intersecting Boolean <optional>
 If `true`, send object behind next lower intersecting object
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

sendToBack() → {fabric.Object}

Moves an object to the bottom of the stack of drawn objects
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

setControlsVisibility(optionsopt) → {fabric.Object}

Sets the visibility state of object controls.
Parameters:
Name Type Attributes Description
options Object <optional>
 Options object
Properties
Name Type Attributes Description
bl Boolean <optional>
 true to enable the bottom-left control, false to disable it
br Boolean <optional>
 true to enable the bottom-right control, false to disable it
mb Boolean <optional>
 true to enable the middle-bottom control, false to disable it
ml Boolean <optional>
 true to enable the middle-left control, false to disable it
mr Boolean <optional>
 true to enable the middle-right control, false to disable it
mt Boolean <optional>
 true to enable the middle-top control, false to disable it
tl Boolean <optional>
 true to enable the top-left control, false to disable it
tr Boolean <optional>
 true to enable the top-right control, false to disable it
mtr Boolean <optional>
 true to enable the middle-top-rotate control, false to disable it
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

setControlVisible(controlKey, visible) → {fabric.Object}

Sets the visibility of the specified control.
Parameters:
Name Type Description
controlKey String The key of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'.
visible Boolean true to set the specified control visible, false otherwise
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

setCoords(skipCornersopt) → {fabric.Object}

Sets corner and controls position coordinates based on current angle, width and height, left and top. oCoords are used to find the corners aCoords are used to quickly find an object on the canvas lineCoords are used to quickly find object during pointer events. See https://github.com/fabricjs/fabric.js/wiki/When-to-call-setCoords and http://fabric5.fabricjs.com/fabric-gotchas
Parameters:
Name Type Attributes Description
skipCorners Boolean <optional>
 skip calculation of oCoords.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

setOnGroup()

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.
Inherited From:
Source:

setOptions(optionsopt)

Sets object's properties from options
Parameters:
Name Type Attributes Description
options Object <optional>
 Options object
Inherited From:
Source:

setPositionByOrigin(pos, originX, originY) → {void}

Sets the position of the object taking into consideration the object's origin
Parameters:
Name Type Description
pos fabric.Point The new position of the object
originX String Horizontal origin: 'left', 'center' or 'right'
originY String Vertical origin: 'top', 'center' or 'bottom'
Inherited From:
Source:
Returns:
Type
void

setupState(optionsopt) → {fabric.Object}

Setups state of an object
Parameters:
Name Type Attributes Description
options Object <optional>
 Object with additional `stateProperties` array to include when saving state
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

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.
Inherited From:
Source:
Returns:
Type
Boolean

straighten() → {fabric.Object}

Straightens an object (rotating it from current angle to one of 0, 90, 180, 270, etc. depending on which is closer)
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

toCanvasElement(options) → {HTMLCanvasElement}

Converts an object into a HTMLCanvas element
Parameters:
Name Type Description
options Object Options object
Properties
Name Type Attributes Default Description
multiplier Number <optional>
 1 Multiplier to scale by
left Number <optional>
 Cropping left offset. Introduced in v1.2.14
top Number <optional>
 Cropping top offset. Introduced in v1.2.14
width Number <optional>
 Cropping width. Introduced in v1.2.14
height Number <optional>
 Cropping height. Introduced in v1.2.14
enableRetinaScaling Boolean <optional>
 Enable retina scaling for clone image. Introduce in 1.6.4
withoutTransform Boolean <optional>
 Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4
withoutShadow Boolean <optional>
 Remove current object shadow. Introduced in 2.4.2
Inherited From:
Source:
Returns:
Returns DOM element with the fabric.Object
Type
HTMLCanvasElement

toClipPathSVG(reviveropt) → {String}

Returns svg clipPath representation of an instance
Parameters:
Name Type Attributes Description
reviver function <optional>
 Method for further parsing of svg representation.
Inherited From:
Source:
Returns:
svg representation of an instance
Type
String

toDatalessObject(propertiesToIncludeopt) → {Object}

Returns (dataless) object representation of an instance
Parameters:
Name Type Attributes Description
propertiesToInclude Array <optional>
 Any properties that you might want to additionally include in the output
Inherited From:
Source:
Returns:
Object representation of an instance
Type
Object

toDataURL(options) → {String}

Converts an object into a data-url-like string
Parameters:
Name Type Description
options Object Options object
Properties
Name Type Attributes Default Description
format String <optional>
 png The format of the output image. Either "jpeg" or "png"
quality Number <optional>
 1 Quality level (0..1). Only used for jpeg.
multiplier Number <optional>
 1 Multiplier to scale by
left Number <optional>
 Cropping left offset. Introduced in v1.2.14
top Number <optional>
 Cropping top offset. Introduced in v1.2.14
width Number <optional>
 Cropping width. Introduced in v1.2.14
height Number <optional>
 Cropping height. Introduced in v1.2.14
enableRetinaScaling Boolean <optional>
 Enable retina scaling for clone image. Introduce in 1.6.4
withoutTransform Boolean <optional>
 Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4
withoutShadow Boolean <optional>
 Remove current object shadow. Introduced in 2.4.2
Inherited From:
Source:
Returns:
Returns a data: URL containing a representation of the object in the format specified by options.format
Type
String

toJSON(propertiesToIncludeopt) → {Object}

Returns a JSON representation of an instance
Parameters:
Name Type Attributes Description
propertiesToInclude Array <optional>
 Any properties that you might want to additionally include in the output
Inherited From:
Source:
Returns:
JSON
Type
Object

toLocalPoint(point, originX, originY) → {fabric.Point}

Returns the point in local coordinates
Parameters:
Name Type Description
point fabric.Point The point relative to the global coordinate system
originX String Horizontal origin: 'left', 'center' or 'right'
originY String Vertical origin: 'top', 'center' or 'bottom'
Inherited From:
Source:
Returns:
Type
fabric.Point

toObject(propertiesToIncludeopt) → {Object}

Returns an object representation of an instance
Parameters:
Name Type Attributes Description
propertiesToInclude Array <optional>
 Any properties that you might want to additionally include in the output
Inherited From:
Source:
Returns:
Object representation of an instance
Type
Object

toString() → {String}

Returns a string representation of an instance
Inherited From:
Source:
Returns:
Type
String

toSVG(reviveropt) → {String}

Returns svg representation of an instance
Parameters:
Name Type Attributes Description
reviver function <optional>
 Method for further parsing of svg representation.
Inherited From:
Source:
Returns:
svg representation of an instance
Type
String

transform(ctx)

Transforms context when rendering an object
Parameters:
Name Type Description
ctx CanvasRenderingContext2D Context
Inherited From:
Source:

translateToCenterPoint(point, originX, originY) → {fabric.Point}

Translates the coordinates from origin to center coordinates (based on the object's dimensions)
Parameters:
Name Type Description
point fabric.Point The point which corresponds to the originX and originY params
originX String Horizontal origin: 'left', 'center' or 'right'
originY String Vertical origin: 'top', 'center' or 'bottom'
Inherited From:
Source:
Returns:
Type
fabric.Point

translateToGivenOrigin(point, fromOriginX, fromOriginY, toOriginX, toOriginY) → {fabric.Point}

Translates the coordinates from a set of origin to another (based on the object's dimensions)
Parameters:
Name Type Description
point fabric.Point The point which corresponds to the originX and originY params
fromOriginX String Horizontal origin: 'left', 'center' or 'right'
fromOriginY String Vertical origin: 'top', 'center' or 'bottom'
toOriginX String Horizontal origin: 'left', 'center' or 'right'
toOriginY String Vertical origin: 'top', 'center' or 'bottom'
Inherited From:
Source:
Returns:
Type
fabric.Point

translateToOriginPoint(center, originX, originY) → {fabric.Point}

Translates the coordinates from center to origin coordinates (based on the object's dimensions)
Parameters:
Name Type Description
center fabric.Point The point which corresponds to center of the object
originX String Horizontal origin: 'left', 'center' or 'right'
originY String Vertical origin: 'top', 'center' or 'bottom'
Inherited From:
Source:
Returns:
Type
fabric.Point

viewportCenter() → {fabric.Object}

Centers object on current viewport of canvas to which it was added last. You might need to call `setCoords` on an object after centering, to update controls area.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

viewportCenterH() → {fabric.Object}

Centers object horizontally on current viewport of canvas to which it was added last. You might need to call `setCoords` on an object after centering, to update controls area.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

viewportCenterV() → {fabric.Object}

Centers object vertically on current viewport of canvas to which it was added last. You might need to call `setCoords` on an object after centering, to update controls area.
Inherited From:
Source:
Returns:
thisArg
Type
fabric.Object

willDrawShadow() → {Boolean}

Check if this object or a child object will cast a shadow used by Group.shouldCache to know if child has a shadow recursively
Inherited From:
Source:
Returns:
Type
Boolean