Path Class
The Path class creates a shape through the use of drawing methods. The Path class has the following drawing methods available:
Like other shapes, Path elements are created using the addShape
method of the Graphic class. The method's cfg argument contains a type attribute.
Assigning "path" or Y.Path to this attribute will create a Path instance. After instantiation, a series of drawing
operations must be performed in order to render a shape. The below code instantiates a path element by defining the
type attribute as "path":
var myPath = myGraphic.addShape({
type: "path",
fill: {
color: "#9aa"
},
stroke: {
weight: 1,
color: "#000"
}
});
Below a Path element with the same properties is instantiated by defining the type attribute with a class reference:
var myPath = myGraphic.addShape({
type: Y.Path,
fill: {
color: "#9aa"
},
stroke: {
weight: 1,
color: "#000"
}
});
After instantiation, a shape or segment needs to be drawn for an element to render. After all draw operations are performed,
the end method will render the shape. The code below will draw a triangle:
myPath.moveTo(35, 5);
myPath.lineTo(65, 65);
myPath.lineTo(5, 65);
myPath.lineTo(35, 5);
myPath.end();
Path has the following implementations based on browser capability.
Path will point to the appropriate implemention.
Constructor
Path
()
Item Index
Methods
Methods
addClass
-
className
Add a class name to each node.
Parameters:
-
classNameStringthe class name to add to the node's class attribute
clear
()
Clears the path.
compareTo
-
refNode
Compares nodes to determine if they match. Node instances can be compared to each other and/or HTMLElements.
Parameters:
-
refNodeHTMLElement | NodeThe reference node to compare to the node.
Returns:
contains
-
needle
Determines whether the node is an ancestor of another HTML element in the DOM hierarchy.
Parameters:
-
needleShape | HTMLElementThe possible node or descendent
Returns:
curveTo
-
cp1x -
cp1y -
cp2x -
cp2y -
x -
y
Draws a bezier curve.
Parameters:
destroy
()
Destroys the instance.
drawRect
-
x -
y -
w -
h
Draws a rectangle.
drawRoundRect
-
x -
y -
w -
h -
ew -
eh
Draws a rectangle with rounded corners.
end
()
Completes a drawing operation.
getBounds
()
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:
getXY
()
Gets the current position of the node in page coordinates.
Returns:
init
()
protected
Init method, invoked during construction.
Calls initializer method.
initializer
()
private
Initializes the shape
lineTo
-
point1 -
point2
Draws a line segment using the current line style from the current drawing position to the specified x and y coordinates.
moveTo
-
x -
y
Moves the current drawing position to specified x and y coordinates.
quadraticCurveTo
-
cpx -
cpy -
x -
y
Draws a quadratic bezier curve.
removeClass
-
className
Removes a class name from each node.
Parameters:
-
classNameStringthe class name to remove from the node's class attribute
rotate
-
deg
Rotates the shape clockwise around it transformOrigin.
Parameters:
-
degNumberThe degree of the rotation.
set
-
name -
value
Sets the value of an attribute.
setXY
-
Contains
Set the position of the shape in page coordinates, regardless of how the node is positioned.
Parameters:
-
ContainsArrayx & y values for new position (coordinates are page-based)
skew
-
x -
y
Skews the shape around the x-axis and y-axis.
test
-
selector
Test if the supplied node matches the supplied selector.
Parameters:
-
selectorStringThe CSS selector to test against.
Returns:
translate
-
x -
y
Specifies a 2d translation.
translateX
-
x
Translates the shape along the x-axis. When translating x and y coordinates,
use the translate method.
Parameters:
-
xNumberThe value to translate.
translateY
-
y
Translates the shape along the y-axis. When translating x and y coordinates,
use the translate method.
Parameters:
-
yNumberThe value to translate.
Attributes
data
String
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
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>
stroke
Object
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
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
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].