#

API Docs for: 3.10.3
Show: Inherited Protected Private Deprecated

# Circle Class

Extends Shape
Defined in: `graphics/js/GraphicBase.js:703`
Module: graphics

Creates circle shape with editable attributes.

`Circle` instances can be created using the `addShape` method of the `Graphic` class. The method's `cfg` argument contains a `type` attribute. Assigning "circle" or `Y.Circle` to this attribute will create a `Circle` instance. Required attributes for instantiating a `Circle` are `type` and `radius`. Optional attributes include:

- fill
- id
- stroke
- transform
- transformOrigin
- visible
- x
- y

The below code creates a circle by defining the `type` attribute as "circle":

       var myCircle = myGraphic.addShape({
           type: "circle",
           radius: 10,
           fill: {
               color: "#9aa"
           },
           stroke: {
               weight: 1,
               color: "#000"
           }
       });

Below, this same circle is created by defining the `type` attribute with a class reference:

       var myCircle = myGraphic.addShape({
           type: Y.Circle,
           radius: 10,
           fill: {
               color: "#9aa"
           },
           stroke: {
               weight: 1,
               color: "#000"
           }
       });

`Circle` has the following implementations based on browser capability.

- `SVGCircle`
- `VMLCircle`
- `CanvasCircle`

It is not necessary to interact with these classes directly. `Circle` will point to the appropriate implemention.

## Constructor

### `Circle`

()

Defined in `graphics/js/GraphicBase.js:703`

- Index
- Methods
- Attributes

## Item Index

### Methods

- addClass
- compareTo
- contains
- destroy
- getBounds
- getXY
- init
- initializer
- removeClass
- rotate
- scale
- set
- setXY
- skew
- skewX
- skewY
- test
- translate
- translateX
- translateY

### Attributes

- data
- fill
- graphic
- height
- id
- node
- radius
- stroke
- transform
- transformOrigin
- visible
- width
- x
- y

## Methods

### `addClass`

(

- `className`

)

Inherited from Shape: `graphics/js/GraphicBase.js:413`

Add a class name to each node.

#### Parameters:

- `className` String

  the class name to add to the node's class attribute

### `compareTo`

(

- `refNode`

)
Boolean

Inherited from Shape: `graphics/js/GraphicBase.js:444`

Compares nodes to determine if they match. Node instances can be compared to each other and/or HTMLElements.

#### Parameters:

- `refNode` HTMLElement | Node

  The reference node to compare to the node.

#### Returns:

Boolean: True if the nodes match, false if they do not.

### `contains`

(

- `needle`

)

Inherited from Shape: `graphics/js/GraphicBase.js:437`

Determines whether the node is an ancestor of another HTML element in the DOM hierarchy.

#### Parameters:

- `needle` Shape | HTMLElement

  The possible node or descendent

#### Returns:

Boolean Whether or not this shape is the needle or its ancestor.

### `destroy`

()

Inherited from Shape: `graphics/js/GraphicBase.js:528`

Destroys the instance.

### `getBounds`

()

Inherited from Shape: `graphics/js/GraphicBase.js:519`

Returns the bounds for a shape.

Calculates the a new bounding box from the original corner coordinates (base on size and position) and the transform matrix. The calculated bounding box is used by the graphic instance to calculate its viewBox.

#### Returns:

Object

### `getXY`

()

Inherited from Shape: `graphics/js/GraphicBase.js:425`

Gets the current position of the node in page coordinates.

#### Returns:

Array The XY position of the shape.

### `init`

() protected

Inherited from Shape: `graphics/js/GraphicBase.js:400`

Init method, invoked during construction. Calls `initializer` method.

### `initializer`

() private

Inherited from Shape: `graphics/js/GraphicBase.js:407`

Initializes the shape

### `removeClass`

(

- `className`

)

Inherited from Shape: `graphics/js/GraphicBase.js:419`

Removes a class name from each node.

#### Parameters:

- `className` String

  the class name to remove from the node's class attribute

### `rotate`

(

- `deg`

)

Inherited from Shape: `graphics/js/GraphicBase.js:507`

Rotates the shape clockwise around it transformOrigin.

#### Parameters:

- `deg` Number

  The degree of the rotation.

### `scale`

(

- `val`

)

Inherited from Shape: `graphics/js/GraphicBase.js:513`

Specifies a 2d scaling operation.

#### Parameters:

- `val` Number

### `set`

(

- `name`
- `value`

)

Inherited from Shape: `graphics/js/GraphicBase.js:458`

Sets the value of an attribute.

#### Parameters:

- `name` String | Object

  The name of the attribute. Alternatively, an object of key value pairs can be passed in to set multiple attributes at once.

- `value` Any

  The value to set the attribute to. This value is ignored if an object is received as the name param.

### `setXY`

(

- `Contains`

)

Inherited from Shape: `graphics/js/GraphicBase.js:431`

Set the position of the shape in page coordinates, regardless of how the node is positioned.

#### Parameters:

- `Contains` Array

  x & y values for new position (coordinates are page-based)

### `skew`

(

- `x`
- `y`

)

Inherited from Shape: `graphics/js/GraphicBase.js:488`

Skews the shape around the x-axis and y-axis.

#### Parameters:

- `x` Number

  The value to skew on the x-axis.

- `y` Number

  The value to skew on the y-axis.

### `skewX`

(

- `x`

)

Inherited from Shape: `graphics/js/GraphicBase.js:495`

Skews the shape around the x-axis.

#### Parameters:

- `x` Number

  x-coordinate

### `skewY`

(

- `y`

)

Inherited from Shape: `graphics/js/GraphicBase.js:501`

Skews the shape around the y-axis.

#### Parameters:

- `y` Number

  y-coordinate

### `test`

(

- `selector`

)

Inherited from Shape: `graphics/js/GraphicBase.js:451`

Test if the supplied node matches the supplied selector.

#### Parameters:

- `selector` String

  The CSS selector to test against.

#### Returns:

Boolean Wheter or not the shape matches the selector.

### `translate`

(

- `x`
- `y`

)

Inherited from Shape: `graphics/js/GraphicBase.js:467`

Specifies a 2d translation.

#### Parameters:

- `x` Number

  The value to transate on the x-axis.

- `y` Number

  The value to translate on the y-axis.

### `translateX`

(

- `x`

)

Inherited from Shape: `graphics/js/GraphicBase.js:474`

Translates the shape along the x-axis. When translating x and y coordinates, use the `translate` method.

#### Parameters:

- `x` Number

  The value to translate.

### `translateY`

(

- `y`

)

Inherited from Shape: `graphics/js/GraphicBase.js:481`

Translates the shape along the y-axis. When translating x and y coordinates, use the `translate` method.

#### Parameters:

- `y` Number

  The value to translate.

## Attributes

### `data`

String

Inherited from Shape: `graphics/js/GraphicBase.js:686`

Represents an SVG Path string. This will be parsed and added to shape's API to represent the SVG data across all implementations. Note that when using VML or SVG implementations, part of this content will be added to the DOM using respective VML/SVG attributes. If your content comes from an untrusted source, you will need to ensure that no malicious code is included in that content.

### `fill`

Object

Inherited from Shape: `graphics/js/GraphicBase.js:606`

Contains information about the fill of the shape.

color
  The color of the fill.
opacity
  Number between 0 and 1 that indicates the opacity of the fill. The default value is 1.
type
  Type of fill.
  solid
    Solid single color fill. (default)
  linear
    Linear gradient fill.
  radial
    Radial gradient fill.

If a `linear` or `radial` is specified as the fill type. The following additional property is used:

stops
  An array of objects containing the following properties:
  color
    The color of the stop.
  opacity
    Number between 0 and 1 that indicates the opacity of the stop. The default value is 1. Note: No effect for IE 6 - 8
  offset
    Number between 0 and 1 indicating where the color stop is positioned.

Linear gradients also have the following property:

     <dt>rotation</dt><dd>Linear gradients flow left to right by default. The rotation property allows you to change the
     flow by rotation. (e.g. A rotation of 180 would make the gradient pain from right to left.)</dd>
     <p>Radial gradients have the following additional properties:</p>
     <dt>r</dt><dd>Radius of the gradient circle.</dd>
     <dt>fx</dt><dd>Focal point x-coordinate of the gradient.</dd>
     <dt>fy</dt><dd>Focal point y-coordinate of the gradient.</dd>
     <dt>cx</dt><dd>
         <p>The x-coordinate of the center of the gradient circle. Determines where the color stop begins. The default value 0.5.</p>
         <p><strong>Note: </strong>Currently, this property is not implemented for corresponding <code>CanvasShape</code> and
         <code>VMLShape</code> classes which are used on Android or IE 6 - 8.</p>
     </dd>
     <dt>cy</dt><dd>
         <p>The y-coordinate of the center of the gradient circle. Determines where the color stop begins. The default value 0.5.</p>
         <p><strong>Note: </strong>Currently, this property is not implemented for corresponding <code>CanvasShape</code> and <code>VMLShape</code>
         classes which are used on Android or IE 6 - 8.</p>
     </dd>

### `graphic`

Graphic readonly

Inherited from Shape: `graphics/js/GraphicBase.js:695`

Reference to the parent graphic instance

### `height`

Number

Inherited from Shape: `graphics/js/GraphicBase.js:594`

Indicates the height of the shape

### `id`

String

Inherited from Shape: `graphics/js/GraphicBase.js:570`

Unique id for class instance.

### `node`

HTMLElement readonly

Inherited from Shape: `graphics/js/GraphicBase.js:679`

Dom node for the shape.

### `radius`

Number

Defined in `graphics/js/GraphicBase.js:761`

Radius of the circle

### `stroke`

Object

Inherited from Shape: `graphics/js/GraphicBase.js:651`

Contains information about the stroke of the shape.

color
  The color of the stroke.
weight
  Number that indicates the width of the stroke.
opacity
  Number between 0 and 1 that indicates the opacity of the stroke. The default value is 1.
dashstyle
Indicates whether to draw a dashed stroke. When set to "none", a solid stroke is drawn. When set to an array, the first index indicates the length of the dash. The second index indicates the length of gap.
linecap
  Specifies the linecap for the stroke. The following values can be specified:
  butt (default)
    Specifies a butt linecap.
  square
    Specifies a sqare linecap.
  round
    Specifies a round linecap.
linejoin
  Specifies a linejoin for the stroke. The following values can be specified:
  round (default)
    Specifies that the linejoin will be round.
  bevel
    Specifies a bevel for the linejoin.
  miter limit
    An integer specifying the miter limit of a miter linejoin. If you want to specify a linejoin of miter, you simply specify the limit as opposed to having separate miter and miter limit values.

### `transform`

String

Inherited from Shape: `graphics/js/GraphicBase.js:540`

A string containing, in order, transform operations applied to the shape instance. The `transform` string can contain the following values:

rotate
  Rotates the shape clockwise around it transformOrigin.
translate
  Specifies a 2d translation.
skew
  Skews the shape around the x-axis and y-axis.
scale
  Specifies a 2d scaling operation.
translateX
  Translates the shape along the x-axis.
translateY
  Translates the shape along the y-axis.
skewX
  Skews the shape around the x-axis.
skewY
  Skews the shape around the y-axis.
matrix
  Specifies a 2D transformation matrix comprised of the specified six values.

Applying transforms through the transform attribute will reset the transform matrix and apply a new transform. The shape class also contains corresponding methods for each transform that will apply the transform to the current matrix. The below code illustrates how you might use the `transform` attribute to instantiate a recangle with a rotation of 45 degrees.

           var myRect = new Y.Rect({
               type:"rect",
               width: 50,
               height: 40,
               transform: "rotate(45)"
           };

The code below would apply `translate` and `rotate` to an existing shape.

       myRect.set("transform", "translate(40, 50) rotate(45)");

### `transformOrigin`

Array

Inherited from Shape: `graphics/js/GraphicBase.js:533`

An array of x, y values which indicates the transformOrigin in which to rotate the shape. Valid values range between 0 and 1 representing a fraction of the shape's corresponding bounding box dimension. The default value is [0.5, 0.5].

### `visible`

Boolean

Inherited from Shape: `graphics/js/GraphicBase.js:600`

Indicates whether the shape is visible.

### `width`

Number

Inherited from Shape: `graphics/js/GraphicBase.js:588`

Indicates the width of the shape

### `x`

Number

Inherited from Shape: `graphics/js/GraphicBase.js:576`

Indicates the x position of shape.

### `y`

Number

Inherited from Shape: `graphics/js/GraphicBase.js:582`

Indicates the y position of shape.