Layer

Extends Item, Group

The Layer item represents a layer in a Paper.js project.

The layer which is currently active can be accessed through project.activeLayer. An array of all layers in a project can be accessed through project.layers.

Constructors

Layer([children])
Creates a new Layer item and places it at the end of the project.layers array. The newly created layer will be activated, so all newly created items will be placed within it.
- Parameters:
- children: Array of Item objects — An array of items that will be added to the newly created layer — optional
- Returns:
- Layer
Example:
```
var layer = new Layer();
```

Layer(object)

Creates a new Layer item and places it at the end of the project.layers array. The newly created layer will be activated, so all newly created items will be placed within it.

Parameters:
object: Object — an object containing the properties to be set on the layer
Returns:
Layer

Example:

var path = new Path([100, 100], [100, 200]);
var path2 = new Path([50, 150], [150, 150]);

// Create a layer. The properties in the object literal
// are set on the newly created layer.
var layer = new Layer({
    children: [path, path2],
    strokeColor: 'black',
    position: view.center
});

Methods

activate()

Activates the layer.

Example:

var firstLayer = project.activeLayer;
var secondLayer = new Layer();
console.log(project.activeLayer == secondLayer); // true
firstLayer.activate();
console.log(project.activeLayer == firstLayer); // true

Properties inherited from `Item`

id
The unique id of the item.
Read only.
- Type:
- Number

className

The class name of the item as a string.

Values:
'Group', 'Layer', 'Path', 'CompoundPath', 'Shape', 'Raster', 'SymbolItem', 'PointText'
Type:
String

name

The name of the item. If the item has a name, it can be accessed by name through its parent’s children list.

Type:
String

Example:

var path = new Path.Circle({
    center: [80, 50],
    radius: 35
});
// Set the name of the path:
path.name = 'example';

// Create a group and add path to it as a child:
var group = new Group();
group.addChild(path);

// The path can be accessed by name:
group.children['example'].fillColor = 'red';

style

The path style of the item.

Type:
Style

Example:Applying several styles to an item in one go, by passing an object to its style property:

var circle = new Path.Circle({
    center: [80, 50],
    radius: 30
});
circle.style = {
    fillColor: 'blue',
    strokeColor: 'red',
    strokeWidth: 5
};

Example:Copying the style of another item:

var path = new Path.Circle({
    center: [50, 50],
    radius: 30,
    fillColor: 'red'
});

var path2 = new Path.Circle({
    center: new Point(180, 50),
    radius: 20
});

// Copy the path style of path:
path2.style = path.style;

Example:Applying the same style object to multiple items:

var myStyle = {
    fillColor: 'red',
    strokeColor: 'blue',
    strokeWidth: 4
};

var path = new Path.Circle({
    center: [50, 50],
    radius: 30
});
path.style = myStyle;

var path2 = new Path.Circle({
    center: new Point(150, 50),
    radius: 20
});
path2.style = myStyle;

locked

Specifies whether the item is locked. When set to true, item interactions with the mouse are disabled.

Default:
false
Type:
Boolean

Example:

var unlockedItem = new Path.Circle({
    center: view.center - [35, 0],
    radius: 30,
    fillColor: 'springgreen',
    onMouseDown: function() {
        this.fillColor = Color.random();
    }
});

var lockedItem = new Path.Circle({
    center: view.center + [35, 0],
    radius: 30,
    fillColor: 'crimson',
    locked: true,
    // This event won't be triggered because the item is locked.
    onMouseDown: function() {
        this.fillColor = Color.random();
    }
});

new PointText({
    content: 'Click on both circles to see which one is locked.',
    point: view.center - [0, 35],
    justification: 'center'
});

visible

Specifies whether the item is visible. When set to false, the item won’t be drawn.

Default:
true
Type:
Boolean

Example:Hiding an item:

var path = new Path.Circle({
    center: [50, 50],
    radius: 20,
    fillColor: 'red'
});

// Hide the path:
path.visible = false;

blendMode
The blend mode with which the item is composited onto the canvas. Both the standard canvas compositing modes, as well as the new CSS blend modes are supported. If blend-modes cannot be rendered natively, they are emulated. Be aware that emulation can have an impact on performance.
- Values:
- 'normal', 'multiply', 'screen', 'overlay', 'soft-light', 'hard- light', 'color-dodge', 'color-burn', 'darken', 'lighten', 'difference', 'exclusion', 'hue', 'saturation', 'luminosity', 'color', 'add', 'subtract', 'average', 'pin-light', 'negation', 'source-over', 'source-in', 'source-out', 'source-atop', 'destination-over', 'destination-in', 'destination-out', 'destination-atop', 'lighter', 'darker', 'copy', 'xor'
- Default:
- 'normal'
- Type:
- String
Example:Setting an item's blend mode:
```
// Create a white rectangle in the background
// with the same dimensions as the view:
var background = new Path.Rectangle(view.bounds);
background.fillColor = 'white';

var circle = new Path.Circle({
    center: [80, 50],
    radius: 35,
    fillColor: 'red'
});

var circle2 = new Path.Circle({
    center: new Point(120, 50),
    radius: 35,
    fillColor: 'blue'
});

// Set the blend mode of circle2:
circle2.blendMode = 'multiply';
```

opacity

The opacity of the item as a value between 0 and 1.

Default:
1
Type:
Number

Example:Making an item 50% transparent:

var circle = new Path.Circle({
    center: [80, 50],
    radius: 35,
    fillColor: 'red'
});

var circle2 = new Path.Circle({
    center: new Point(120, 50),
    radius: 35,
    fillColor: 'blue',
    strokeColor: 'green',
    strokeWidth: 10
});

// Make circle2 50% transparent:
circle2.opacity = 0.5;

selected
Specifies whether the item is selected. This will also return true for Group items if they are partially selected, e.g. groups containing selected or partially selected paths.
Paper.js draws the visual outlines of selected items on top of your project. This can be useful for debugging, as it allows you to see the construction of paths, position of path curves, individual segment points and bounding boxes of symbol and raster items.
- Default:
- false
- Type:
- Boolean
- See also:
- project.selectedItems
- segment.selected
- curve.selected
- point.selected
Example:Selecting an item:
```
var path = new Path.Circle({
    center: [80, 50],
    radius: 35
});
path.selected = true; // Select the path
```
clipMask
Specifies whether the item defines a clip mask. This can only be set on paths and compound paths, and only if the item is already contained within a clipping group.
- Default:
- false
- Type:
- Boolean

data

A plain javascript object which can be used to store arbitrary data on the item.

Type:
Object

Example:

var path = new Path();
path.data.remember = 'milk';

Example:

var path = new Path();
path.data.malcolm = new Point(20, 30);
console.log(path.data.malcolm.x); // 20

Example:

var path = new Path();
path.data = {
    home: 'Omicron Theta',
    found: 2338,
    pets: ['Spot']
};
console.log(path.data.pets.length); // 1

Example:

var path = new Path({
    data: {
        home: 'Omicron Theta',
        found: 2338,
        pets: ['Spot']
    }
});
console.log(path.data.pets.length); // 1

Position and Bounding Boxes

position

The item’s position within the parent item’s coordinate system. By default, this is the rectangle.center of the item’s bounds rectangle.

Type:
Point

Example:Changing the position of a path:

// Create a circle at position { x: 10, y: 10 }
var circle = new Path.Circle({
    center: new Point(10, 10),
    radius: 10,
    fillColor: 'red'
});

// Move the circle to { x: 20, y: 20 }
circle.position = new Point(20, 20);

// Move the circle 100 points to the right and 50 points down
circle.position += new Point(100, 50);

Example:Changing the x coordinate of an item's position:

// Create a circle at position { x: 20, y: 20 }
var circle = new Path.Circle({
    center: new Point(20, 20),
    radius: 10,
    fillColor: 'red'
});

// Move the circle 100 points to the right
circle.position.x += 100;

pivot
The item’s pivot point specified in the item coordinate system, defining the point around which all transformations are hinging. This is also the reference point for position. By default, it is set to null, meaning the rectangle.center of the item’s bounds rectangle is used as pivot.
- Default:
- null
- Type:
- Point
bounds
The bounding rectangle of the item excluding stroke width.
- Type:
- Rectangle
strokeBounds
The bounding rectangle of the item including stroke width.
- Type:
- Rectangle
handleBounds
The bounding rectangle of the item including handles.
- Type:
- Rectangle
internalBounds
The bounding rectangle of the item without any matrix transformations.
Typical use case would be drawing a frame around the object where you want to draw something of the same size, position, rotation, and scaling, like a selection frame.
- Type:
- Rectangle
rotation
The current rotation angle of the item, as described by its matrix. Please note that this only returns meaningful values for items with applyMatrix set to false, meaning they do not directly bake transformations into their content.
- Type:
- Number
scaling
The current scale factor of the item, as described by its matrix. Please note that this only returns meaningful values for items with applyMatrix set to false, meaning they do not directly bake transformations into their content.
- Type:
- Point
matrix
The item’s transformation matrix, defining position and dimensions in relation to its parent item in which it is contained.
- Type:
- Matrix
globalMatrix
The item’s global transformation matrix in relation to the global project coordinate space. Note that the view’s transformations resulting from zooming and panning are not factored in.
Read only.
- Type:
- Matrix
viewMatrix
The item’s global matrix in relation to the view coordinate space. This means that the view’s transformations resulting from zooming and panning are factored in.
Read only.
- Type:
- Matrix
applyMatrix
Controls whether the transformations applied to the item (e.g. through transform(matrix), rotate(angle), scale(scale), etc.) are stored in its matrix property, or whether they are directly applied to its contents or children (passed on to the segments in Path items, the children of Group items, etc.).
- Default:
- true
- Type:
- Boolean

Project Hierarchy

project
The project that this item belongs to.
Read only.
- Type:
- Project
view
The view that this item belongs to.
Read only.
- Type:
- View
layer
The layer that this item is contained within.
Read only.
- Type:
- Layer

parent

The item that this item is contained within.

Type:
Item

Example:

var path = new Path();

// New items are placed in the active layer:
console.log(path.parent == project.activeLayer); // true

var group = new Group();
group.addChild(path);

// Now the parent of the path has become the group:
console.log(path.parent == group); // true

Example:Setting the parent of the item to another item

var path = new Path();

// New items are placed in the active layer:
console.log(path.parent == project.activeLayer); // true

var group = new Group();
path.parent = group;

// Now the parent of the path has become the group:
console.log(path.parent == group); // true

// The path is now contained in the children list of group:
console.log(group.children[0] == path); // true

Example:Setting the parent of an item in the constructor

var group = new Group();

var path = new Path({
    parent: group
});

// The parent of the path is the group:
console.log(path.parent == group); // true

// The path is contained in the children list of group:
console.log(group.children[0] == path); // true

children

The children items contained within this item. Items that define a name can also be accessed by name.

Please note: The children array should not be modified directly using array functions. To remove single items from the children list, use item.remove(), to remove all items from the children list, use item.removeChildren(). To add items to the children list, use item.addChild(item) or item.insertChild(index, item).

Type:
Array of Item objects

Example:Accessing items in the children array:

var path = new Path.Circle({
    center: [80, 50],
    radius: 35
});

// Create a group and move the path into it:
var group = new Group();
group.addChild(path);

// Access the path through the group's children array:
group.children[0].fillColor = 'red';

Example:Accessing children by name:

var path = new Path.Circle({
    center: [80, 50],
    radius: 35
});
// Set the name of the path:
path.name = 'example';

// Create a group and move the path into it:
var group = new Group();
group.addChild(path);

// The path can be accessed by name:
group.children['example'].fillColor = 'orange';

Example:Passing an array of items to item.children:

var path = new Path.Circle({
    center: [80, 50],
    radius: 35
});

var group = new Group();
group.children = [path];

// The path is the first child of the group:
group.firstChild.fillColor = 'green';

firstChild
The first item contained within this item. This is a shortcut for accessing item.children[0].
Read only.
- Type:
- Item
lastChild
The last item contained within this item.This is a shortcut for accessing item.children[item.children.length - 1].
Read only.
- Type:
- Item
nextSibling
The next item on the same level as this item.
Read only.
- Type:
- Item
previousSibling
The previous item on the same level as this item.
Read only.
- Type:
- Item
index
The index of this item within the list of its parent’s children.
Read only.
- Type:
- Number

Stroke Style

strokeColor

The color of the stroke.

Type:
Color⟋null

Example:Setting the stroke color of a path:

// Create a circle shaped path at { x: 80, y: 50 }
// with a radius of 35:
var circle = new Path.Circle({
    center: [80, 50],
    radius: 35
});

// Set its stroke color to RGB red:
circle.strokeColor = new Color(1, 0, 0);

strokeWidth

The width of the stroke.

Type:
Number

Example:Setting an item's stroke width:

// Create a circle shaped path at { x: 80, y: 50 }
// with a radius of 35:
var circle = new Path.Circle({
    center: [80, 50],
    radius: 35,
    strokeColor: 'red'
});

// Set its stroke width to 10:
circle.strokeWidth = 10;

strokeCap

The shape to be used at the beginning and end of open Path items, when they have a stroke.

Values:
'round', 'square', 'butt'
Default:
'butt'
Type:
String

Example:A look at the different stroke caps:

var line = new Path({
    segments: [[80, 50], [420, 50]],
    strokeColor: 'black',
    strokeWidth: 20,
    selected: true
});

// Set the stroke cap of the line to be round:
line.strokeCap = 'round';

// Copy the path and set its stroke cap to be square:
var line2 = line.clone();
line2.position.y += 50;
line2.strokeCap = 'square';

// Make another copy and set its stroke cap to be butt:
var line2 = line.clone();
line2.position.y += 100;
line2.strokeCap = 'butt';

strokeJoin

The shape to be used at the segments and corners of Path items when they have a stroke.

Values:
'miter', 'round', 'bevel'
Default:
'miter'
Type:
String

Example:A look at the different stroke joins:

var path = new Path({
    segments: [[80, 100], [120, 40], [160, 100]],
    strokeColor: 'black',
    strokeWidth: 20,
    // Select the path, in order to see where the stroke is formed:
    selected: true
});

var path2 = path.clone();
path2.position.x += path2.bounds.width * 1.5;
path2.strokeJoin = 'round';

var path3 = path2.clone();
path3.position.x += path3.bounds.width * 1.5;
path3.strokeJoin = 'bevel';

dashOffset
The dash offset of the stroke.
- Default:
- 0
- Type:
- Number
strokeScaling
Specifies whether the stroke is to be drawn taking the current affine transformation into account (the default behavior), or whether it should appear as a non-scaling stroke.
- Default:
- true
- Type:
- Boolean

dashArray

Specifies an array containing the dash and gap lengths of the stroke.

Default:
[]
Type:
Array of Numbers

Example:

var path = new Path.Circle({
    center: [80, 50],
    radius: 40,
    strokeWidth: 2,
    strokeColor: 'black'
});

// Set the dashed stroke to [10pt dash, 4pt gap]:
path.dashArray = [10, 4];

miterLimit
The miter limit of the stroke. When two line segments meet at a sharp angle and miter joins have been specified for item.strokeJoin, it is possible for the miter to extend far beyond the item.strokeWidth of the path. The miterLimit imposes a limit on the ratio of the miter length to the item.strokeWidth.
- Default:
- 10
- Type:
- Number

Fill Style

fillColor

The fill color of the item.

Type:
Color⟋null

Example:Setting the fill color of a path to red:

// Create a circle shaped path at { x: 80, y: 50 }
// with a radius of 35:
var circle = new Path.Circle({
    center: [80, 50],
    radius: 35
});

// Set the fill color of the circle to RGB red:
circle.fillColor = new Color(1, 0, 0);

fillRule
The fill-rule with which the shape gets filled. Please note that only modern browsers support fill-rules other than 'nonzero'.
- Values:
- 'nonzero', 'evenodd'
- Default:
- 'nonzero'
- Type:
- String

Shadow Style

shadowColor

The shadow color.

Type:
Color⟋null

Example:Creating a circle with a black shadow:

var circle = new Path.Circle({
    center: [80, 50],
    radius: 35,
    fillColor: 'white',
    // Set the shadow color of the circle to RGB black:
    shadowColor: new Color(0, 0, 0),
    // Set the shadow blur radius to 12:
    shadowBlur: 12,
    // Offset the shadow by { x: 5, y: 5 }
    shadowOffset: new Point(5, 5)
});

shadowBlur
The shadow’s blur radius.
- Default:
- 0
- Type:
- Number
shadowOffset
The shadow’s offset.
- Default:
- 0
- Type:
- Point

Selection Style

selectedColor
The color the item is highlighted with when selected. If the item does not specify its own color, the color defined by its layer is used instead.
- Type:
- Color⟋null

Event Handlers

onFrame
Item level handler function to be called on each frame of an animation. The function receives an event object which contains information about the frame event:
- Type:
- Function⟋null
- Options:
- event.count: Number — the number of times the frame event was fired
- event.time: Number — the total amount of time passed since the first frame event in seconds
- event.delta: Number — the time passed in seconds since the last frame event
- See also:
- view.onFrame
Example:Creating an animation:
```
// Create a rectangle shaped path with its top left point at:
// {x: 50, y: 25} and a size of {width: 50, height: 50}
var path = new Path.Rectangle(new Point(50, 25), new Size(50, 50));
path.fillColor = 'black';

path.onFrame = function(event) {
    // Every frame, rotate the path by 3 degrees:
    this.rotate(3);
}
```

onMouseDown

The function to be called when the mouse button is pushed down on the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.

Type:
Function⟋null
See also:
view.onMouseDown

Example:Press the mouse button down on the circle shaped path, to make it red:

// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse is pressed on the item,
// set its fill color to red:
path.onMouseDown = function(event) {
    this.fillColor = 'red';
}

Example:Press the mouse on the circle shaped paths to remove them:

// Loop 30 times:
for (var i = 0; i < 30; i++) {
    // Create a circle shaped path at a random position
    // in the view:
    var path = new Path.Circle({
        center: Point.random() * view.size,
        radius: 25,
        fillColor: 'black',
        strokeColor: 'white'
    });

    // When the mouse is pressed on the item, remove it:
    path.onMouseDown = function(event) {
        this.remove();
    }
}

onMouseDrag
The function to be called when the mouse position changes while the mouse is being dragged over the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.
- Type:
- Function⟋null
- See also:
- view.onMouseDrag
Example:Press and drag the mouse on the blue circle to move it:
```
// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 50,
    fillColor: 'blue'
});

// Install a drag event handler that moves the path along.
path.onMouseDrag = function(event) {
    path.position += event.delta;
}
```
onMouseUp
The function to be called when the mouse button is released over the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.
- Type:
- Function⟋null
- See also:
- view.onMouseUp
Example:Release the mouse button over the circle shaped path, to make it red:
```
// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse is released over the item,
// set its fill color to red:
path.onMouseUp = function(event) {
    this.fillColor = 'red';
}
```

onClick

The function to be called when the mouse clicks on the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.

Type:
Function⟋null
See also:
view.onClick

Example:Click on the circle shaped path, to make it red:

// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse is clicked on the item,
// set its fill color to red:
path.onClick = function(event) {
    this.fillColor = 'red';
}

Example:Click on the circle shaped paths to remove them:

// Loop 30 times:
for (var i = 0; i < 30; i++) {
    // Create a circle shaped path at a random position
    // in the view:
    var path = new Path.Circle({
        center: Point.random() * view.size,
        radius: 25,
        fillColor: 'black',
        strokeColor: 'white'
    });

    // When the mouse clicks on the item, remove it:
    path.onClick = function(event) {
        this.remove();
    }
}

onDoubleClick

The function to be called when the mouse double clicks on the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.

Type:
Function⟋null
See also:
view.onDoubleClick

Example:Double click on the circle shaped path, to make it red:

// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse is double clicked on the item,
// set its fill color to red:
path.onDoubleClick = function(event) {
    this.fillColor = 'red';
}

Example:Double click on the circle shaped paths to remove them:

// Loop 30 times:
for (var i = 0; i < 30; i++) {
    // Create a circle shaped path at a random position
    // in the view:
    var path = new Path.Circle({
        center: Point.random() * view.size,
        radius: 25,
        fillColor: 'black',
        strokeColor: 'white'
    });

    // When the mouse is double clicked on the item, remove it:
    path.onDoubleClick = function(event) {
        this.remove();
    }
}

onMouseMove
The function to be called repeatedly while the mouse moves over the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.
- Type:
- Function⟋null
- See also:
- view.onMouseMove
Example:Move over the circle shaped path, to change its opacity:
```
// Create a circle shaped path at the center of the view:
    var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
    });

// When the mouse moves on top of the item, set its opacity
// to a random value between 0 and 1:
path.onMouseMove = function(event) {
    this.opacity = Math.random();
}
```

onMouseEnter

The function to be called when the mouse moves over the item. This function will only be called again, once the mouse moved outside of the item first. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.

Type:
Function⟋null
See also:
view.onMouseEnter

Example:When you move the mouse over the item, its fill color is set to red. When you move the mouse outside again, its fill color is set back to black.

// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse enters the item, set its fill color to red:
path.onMouseEnter = function(event) {
    this.fillColor = 'red';
}

// When the mouse leaves the item, set its fill color to black:
path.onMouseLeave = function(event) {
    this.fillColor = 'black';
}

Example:When you click the mouse, you create new circle shaped items. When you move the mouse over the item, its fill color is set to red. When you move the mouse outside again, its fill color is set back to black.

function enter(event) {
    this.fillColor = 'red';
}

function leave(event) {
    this.fillColor = 'black';
}

// When the mouse is pressed:
function onMouseDown(event) {
    // Create a circle shaped path at the position of the mouse:
    var path = new Path.Circle(event.point, 25);
    path.fillColor = 'black';

    // When the mouse enters the item, set its fill color to red:
    path.onMouseEnter = enter;

    // When the mouse leaves the item, set its fill color to black:
    path.onMouseLeave = leave;
}

onMouseLeave
The function to be called when the mouse moves out of the item. The function receives a MouseEvent object which contains information about the mouse event. Note that such mouse events bubble up the scene graph hierarchy and will reach the view, unless they are stopped with event.stopPropagation() or by returning false from the handler.
- Type:
- Function⟋null
- See also:
- view.onMouseLeave
Example:Move the mouse over the circle shaped path and then move it out of it again to set its fill color to red:
```
// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse leaves the item, set its fill color to red:
path.onMouseLeave = function(event) {
    this.fillColor = 'red';
}
```

Methods inherited from `Item`

set(props)
Sets the properties of the passed object literal on this item to the values defined in the object literal, if the item has property of the given name (or a setter defined for it).
- Parameters:
- props: Object
- Returns:
- Item — the item itself
Example:Setting properties through an object literal
```
var circle = new Path.Circle({
    center: [80, 50],
    radius: 35
});

circle.set({
    strokeColor: 'red',
    strokeWidth: 10,
    fillColor: 'black',
    selected: true
});
```
clone([options])
Clones the item within the same project and places the copy above the item.
- Options:
- insert: undefined — specifies whether the copy should be inserted into the scene graph. When set to true, it is inserted above the original — default: true
- deep: undefined — specifies whether the item’s children should also be cloned — default: true
- Parameters:
- options: Object — optional, default: { insert: true, deep: true }
- Returns:
- Item — the newly cloned item
Example:Cloning items:
```
var circle = new Path.Circle({
    center: [50, 50],
    radius: 10,
    fillColor: 'red'
});

// Make 20 copies of the circle:
for (var i = 0; i < 20; i++) {
    var copy = circle.clone();

    // Distribute the copies horizontally, so we can see them:
    copy.position.x += i * copy.bounds.width;
}
```
copyContent(source)
Copies the content of the specified item over to this item.
- Parameters:
- source: Item — the item to copy the content from
copyAttributes(source, excludeMatrix)
Copies all attributes of the specified item over to this item. This includes its style, visibility, matrix, pivot, blend-mode, opacity, selection state, data, name, etc.
- Parameters:
- source: Item — the item to copy the attributes from
- excludeMatrix: Boolean — whether to exclude the transformation matrix when copying all attributes
rasterize([resolution[, insert]])
Rasterizes the item into a newly created Raster object. The item itself is not removed after rasterization.
- Parameters:
- resolution: Number — the resolution of the raster in pixels per inch (DPI). If not specified, the value of view.resolution is used. — optional, default: view.resolution
- insert: Boolean — specifies whether the raster should be inserted into the scene graph. When set to true, it is inserted above the original — optional, default: true
- Returns:
- Raster — the newly created raster item
Example:Rasterizing an item:
```
var circle = new Path.Circle({
    center: [50, 50],
    radius: 5,
    fillColor: 'red'
});

// Create a rasterized version of the path:
var raster = circle.rasterize();

// Move it 100pt to the right:
raster.position.x += 100;

// Scale the path and the raster by 300%, so we can compare them:
circle.scale(5);
raster.scale(5);
```

Geometric Tests

contains(point)

Checks whether the item’s geometry contains the given point.

Parameters:
point: Point — the point to check for
Returns:
Boolean

Example:Click within and outside the star below Create a star shaped path:

var path = new Path.Star({
    center: [50, 50],
    points: 12,
    radius1: 20,
    radius2: 40,
    fillColor: 'black'
});

// Whenever the user presses the mouse:
function onMouseDown(event) {
    // If the position of the mouse is within the path,
    // set its fill color to red, otherwise set it to
    // black:
    if (path.contains(event.point)) {
        path.fillColor = 'red';
    } else {
        path.fillColor = 'black';
    }
}

isInside(rect)
- Parameters:
- rect: Rectangle — the rectangle to check against
- Returns:
- Boolean
intersects(item)
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean

Hit-testing, Fetching and Matching Items

hitTest(point[, options])
Performs a hit-test on the item and its children (if it is a Group or Layer) at the location of the specified point, returning the first found hit.
The options object allows you to control the specifics of the hit- test and may contain a combination of the following values:
- Options:
- options.tolerance: Number — the tolerance of the hit-test — default: paperScope.settings.hitTolerance
- options.class: Function — only hit-test against a specific item class, or any of its sub-classes, by providing the constructor function against which an instanceof check is performed: Group, Layer, Path, CompoundPath, Shape, Raster, SymbolItem, PointText, …
- options.match: Function — a match function to be called for each found hit result: Return true to return the result, false to keep searching
- options.fill: Boolean — hit-test the fill of items — default: true
- options.stroke: Boolean — hit-test the stroke of path items, taking into account the setting of stroke color and width — default: true
- options.segments: Boolean — hit-test for segment.point of Path items — default: true
- options.curves: Boolean — hit-test the curves of path items, without taking the stroke color or width into account
- options.handles: Boolean — hit-test for the handles (segment.handleIn / segment.handleOut) of path segments.
- options.ends: Boolean — only hit-test for the first or last segment points of open path items
- options.position: Boolean — hit-test the item.position of of items, which depends on the setting of item.pivot
- options.center: Boolean — hit-test the rectangle.center of the bounding rectangle of items (item.bounds)
- options.bounds: Boolean — hit-test the corners and side-centers of the bounding rectangle of items (item.bounds)
- options.guides: Boolean — hit-test items that have Item#guide set to true
- options.selected: Boolean — only hit selected items
- Parameters:
- point: Point — the point where the hit-test should be performed (in global coordinates system).
- options: Object — optional, default: { fill: true, stroke: true, segments: true, tolerance: settings.hitTolerance }
- Returns:
- HitResult — a hit result object describing what exactly was hit or null if nothing was hit
hitTestAll(point[, options])
Performs a hit-test on the item and its children (if it is a Group or Layer) at the location of the specified point, returning all found hits.
The options object allows you to control the specifics of the hit- test. See hitTest(point[, options]) for a list of all options.
- Parameters:
- point: Point — the point where the hit-test should be performed (in global coordinates system).
- options: Object — optional, default: { fill: true, stroke: true, segments: true, tolerance: settings.hitTolerance }
- Returns:
- Array of HitResult objects — hit result objects for all hits, describing what exactly was hit or null if nothing was hit
- See also:
- hitTest(point[, options]);
matches(options)
Checks whether the item matches the criteria described by the given object, by iterating over all of its properties and matching against their values through matches(name, compare).
See project.getItems(options) for a selection of illustrated examples.
- Parameters:
- options: Object⟋Function — the criteria to match against
- Returns:
- Boolean — true if the item matches all the criteria, false otherwise
- See also:
- getItems(options)
matches(name, compare)
Checks whether the item matches the given criteria. Extended matching is possible by providing a compare function or a regular expression. Matching points, colors only work as a comparison of the full object, not partial matching (e.g. only providing the x-coordinate to match all points with that x-value). Partial matching does work for item.data.
See project.getItems(options) for a selection of illustrated examples.
- Parameters:
- name: String — the name of the state to match against
- compare: Object — the value, function or regular expression to compare against
- Returns:
- Boolean — true if the item matches the state, false otherwise
- See also:
- getItems(options)
getItems(options)
Fetch the descendants (children or children of children) of this item that match the properties in the specified object. Extended matching is possible by providing a compare function or regular expression. Matching points, colors only work as a comparison of the full object, not partial matching (e.g. only providing the x- coordinate to match all points with that x-value). Partial matching does work for item.data.
Matching items against a rectangular area is also possible, by setting either options.inside or options.overlapping to a rectangle describing the area in which the items either have to be fully or partly contained.
See project.getItems(options) for a selection of illustrated examples.
- Options:
- options.recursive: Boolean — whether to loop recursively through all children, or stop at the current level — default: true
- options.match: Function — a match function to be called for each item, allowing the definition of more flexible item checks that are not bound to properties. If no other match properties are defined, this function can also be passed instead of the options object
- options.class: Function — the constructor function of the item type to match against
- options.inside: Rectangle — the rectangle in which the items need to be fully contained
- options.overlapping: Rectangle — the rectangle with which the items need to at least partly overlap
- Parameters:
- options: Object⟋Function — the criteria to match against
- Returns:
- Array of Item objects — the list of matching descendant items
- See also:
- matches(options)
getItem(options)
Fetch the first descendant (child or child of child) of this item that matches the properties in the specified object. Extended matching is possible by providing a compare function or regular expression. Matching points, colors only work as a comparison of the full object, not partial matching (e.g. only providing the x- coordinate to match all points with that x-value). Partial matching does work for item.data. See project.getItems(match) for a selection of illustrated examples.
- Parameters:
- options: Object⟋Function — the criteria to match against
- Returns:
- Item — the first descendant item matching the given criteria
- See also:
- getItems(options)

Importing / Exporting JSON and SVG

exportJSON([options])
Exports (serializes) the item with its content and child items to a JSON data string.
- Options:
- options.asString: Boolean — whether the JSON is returned as a Object or a String — default: true
- options.precision: Number — the amount of fractional digits in numbers used in JSON data — default: 5
- Parameters:
- options: Object — the serialization options — optional
- Returns:
- String — the exported JSON data
importJSON(json)
Imports (deserializes) the stored JSON data into this item. If the data describes an item of the same class or a parent class of the item, the data is imported into the item itself. If not, the imported item is added to this item’s item.children list. Note that not all type of items can have children.
- Parameters:
- json: String — the JSON data to import from
- Returns:
- Item
exportSVG([options])
importSVG(svg[, options])
Converts the provided SVG content into Paper.js items and adds them to the this item’s children list. Note that the item is not cleared first. You can call item.removeChildren() to do so.
- Options:
- options.expandShapes: Boolean — whether imported shape items should be expanded to path items — default: false
- options.onLoad: Function — the callback function to call once the SVG content is loaded from the given URL receiving two arguments: the converted item and the original svg data as a string. Only required when loading from external resources.
- options.onError: Function — the callback function to call if an error occurs during loading. Only required when loading from external resources.
- options.insert: Boolean — whether the imported items should be added to the item that importSVG() is called on — default: true
- options.applyMatrix: Boolean — whether the imported items should have their transformation matrices applied to their contents or not — default: paperScope.settings.applyMatrix
- Parameters:
- svg: SVGElement⟋String — the SVG content to import, either as a SVG DOM node, a string containing SVG content, or a string describing the URL of the SVG file to fetch.
- options: Object — the import options — optional
- Returns:
- Item — the newly created Paper.js item containing the converted SVG content
importSVG(svg, onLoad)
Imports the provided external SVG file, converts it into Paper.js items and adds them to the this item’s children list. Note that the item is not cleared first. You can call item.removeChildren() to do so.
- Parameters:
- svg: SVGElement⟋String — the URL of the SVG file to fetch.
- onLoad: Function — the callback function to call once the SVG content is loaded from the given URL receiving two arguments: the converted item and the original svg data as a string. Only required when loading from external files.
- Returns:
- Item — the newly created Paper.js item containing the converted SVG content

Hierarchy Operations

addChild(item)
Adds the specified item as a child of this item at the end of the its children list. You can use this function for groups, compound paths and layers.
- Parameters:
- item: Item — the item to be added as a child
- Returns:
- Item — the added item, or null if adding was not possible
insertChild(index, item)
Inserts the specified item as a child of this item at the specified index in its children list. You can use this function for groups, compound paths and layers.
- Parameters:
- index: Number — the index at which to insert the item
- item: Item — the item to be inserted as a child
- Returns:
- Item — the inserted item, or null if inserting was not possible
addChildren(items)
Adds the specified items as children of this item at the end of the its children list. You can use this function for groups, compound paths and layers.
- Parameters:
- items: Array of Item objects — the items to be added as children
- Returns:
- Array of Item objects — the added items, or null if adding was not possible
insertChildren(index, items)
Inserts the specified items as children of this item at the specified index in its children list. You can use this function for groups, compound paths and layers.
- Parameters:
- index: Number
- items: Array of Item objects — the items to be appended as children
- Returns:
- Array of Item objects — the inserted items, or null if inserted was not possible
insertAbove(item)
Inserts this item above the specified item.
- Parameters:
- item: Item — the item above which it should be inserted
- Returns:
- Item — the inserted item, or null if inserting was not possible
insertBelow(item)
Inserts this item below the specified item.
- Parameters:
- item: Item — the item below which it should be inserted
- Returns:
- Item — the inserted item, or null if inserting was not possible
sendToBack()
Sends this item to the back of all other items within the same parent.
bringToFront()
Brings this item to the front of all other items within the same parent.
addTo(owner)
Adds it to the specified owner, which can be either a Item or a Project.
- Parameters:
- owner: Project⟋Layer⟋Group⟋CompoundPath — the item or project to add the item to
- Returns:
- Item — the item itself, if it was successfully added
copyTo(owner)
Clones the item and adds it to the specified owner, which can be either a Item or a Project.
- Parameters:
- owner: Project⟋Layer⟋Group⟋CompoundPath — the item or project to copy the item to
- Returns:
- Item — the new copy of the item, if it was successfully added
reduce(options)
If this is a group, layer or compound-path with only one child-item, the child-item is moved outside and the parent is erased. Otherwise, the item itself is returned unmodified.
- Parameters:
- options:
- Returns:
- Item — the reduced item
remove()
Removes the item and all its children from the project. The item is not destroyed and can be inserted again after removal.
- Returns:
- Boolean — true if the item was removed, false otherwise
replaceWith(item)
Replaces this item with the provided new item which will takes its place in the project hierarchy instead.
- Parameters:
- item: Item — the item that will replace this item
- Returns:
- Boolean — true if the item was replaced, false otherwise
removeChildren()
Removes all of the item’s children (if any).
- Returns:
- Array of Item objects — an array containing the removed items
removeChildren(start[, end])
Removes the children from the specified start index to and excluding the end index from the parent’s children array.
- Parameters:
- start: Number — the beginning index, inclusive
- end: Number — the ending index, exclusive — optional, default: children.length
- Returns:
- Array of Item objects — an array containing the removed items
reverseChildren()
Reverses the order of the item’s children

Tests

isEmpty([recursively])
Specifies whether the item has any content or not. The meaning of what content is differs from type to type. For example, a Group with no children, a TextItem with no text content and a Path with no segments all are considered empty.
- Parameters:
- recursively: Boolean — whether an item with children should be considered empty if all its descendants are empty — optional, default: false
- Returns:
- Boolean

Style Tests

hasFill()
Checks whether the item has a fill.
- Returns:
- Boolean — true if the item has a fill, false otherwise
hasStroke()
Checks whether the item has a stroke.
- Returns:
- Boolean — true if the item has a stroke, false otherwise
hasShadow()
Checks whether the item has a shadow.
- Returns:
- Boolean — true if the item has a shadow, false otherwise

Hierarchy Tests

hasChildren()
Checks if the item contains any children items.
- Returns:
- Boolean — true it has one or more children, false otherwise
isInserted()
Checks whether the item and all its parents are inserted into scene graph or not.
- Returns:
- Boolean — true if the item is inserted into the scene graph, false otherwise
isAbove(item)
Checks if this item is above the specified item in the stacking order of the project.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true if it is above the specified item, false otherwise
isBelow(item)
Checks if the item is below the specified item in the stacking order of the project.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true if it is below the specified item, false otherwise
isParent(item)
Checks whether the specified item is the parent of the item.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true if it is the parent of the item, false otherwise
isChild(item)
Checks whether the specified item is a child of the item.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true it is a child of the item, false otherwise
isDescendant(item)
Checks if the item is contained within the specified item.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true if it is inside the specified item, false otherwise
isAncestor(item)
Checks if the item is an ancestor of the specified item.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true if the item is an ancestor of the specified item, false otherwise
isSibling(item)
Checks if the item is an a sibling of the specified item.
- Parameters:
- item: Item — the item to check against
- Returns:
- Boolean — true if the item is aa sibling of the specified item, false otherwise
isGroupedWith(item)
Checks whether the item is grouped with the specified item.
- Parameters:
- item: Item
- Returns:
- Boolean — true if the items are grouped together, false otherwise

Transform Functions

translate(delta)
Translates (moves) the item by the given offset views.
- Parameters:
- delta: Point — the offset to translate the item by

rotate(angle[, center])

Rotates the item by a given angle around the given center point.

Angles are oriented clockwise and measured in degrees.

Parameters:
angle: Number — the rotation angle
center: Point — optional, default: item.position
See also:
matrix.rotate(angle[, center])

Example:Rotating an item:

// Create a rectangle shaped path with its top left
// point at {x: 80, y: 25} and a size of {width: 50, height: 50}:
var path = new Path.Rectangle(new Point(80, 25), new Size(50, 50));
path.fillColor = 'black';

// Rotate the path by 30 degrees:
path.rotate(30);

Example:Rotating an item around a specific point:

// Create a rectangle shaped path with its top left
// point at {x: 175, y: 50} and a size of {width: 100, height: 100}:
var topLeft = new Point(175, 50);
var size = new Size(100, 100);
var path = new Path.Rectangle(topLeft, size);
path.fillColor = 'black';

// Draw a circle shaped path in the center of the view,
// to show the rotation point:
var circle = new Path.Circle({
    center: view.center,
    radius: 5,
    fillColor: 'white'
});

// Each frame rotate the path 3 degrees around the center point
// of the view:
function onFrame(event) {
    path.rotate(3, view.center);
}

scale(scale[, center])

Scales the item by the given value from its center point, or optionally from a supplied point.

Parameters:
scale: Number — the scale factor
center: Point — optional, default: item.position

Example:Scaling an item from its center point:

// Create a circle shaped path at { x: 80, y: 50 }
// with a radius of 20:
var circle = new Path.Circle({
    center: [80, 50],
    radius: 20,
    fillColor: 'red'
});

// Scale the path by 150% from its center point
circle.scale(1.5);

Example:Scaling an item from a specific point:

// Create a circle shaped path at { x: 80, y: 50 }
// with a radius of 20:
var circle = new Path.Circle({
    center: [80, 50],
    radius: 20,
    fillColor: 'red'
});

// Scale the path 150% from its bottom left corner
circle.scale(1.5, circle.bounds.bottomLeft);

scale(hor, ver[, center])
Scales the item by the given values from its center point, or optionally from a supplied point.
- Parameters:
- hor: Number — the horizontal scale factor
- ver: Number — the vertical scale factor
- center: Point — optional, default: item.position
Example:Scaling an item horizontally by 300%:
```
// Create a circle shaped path at { x: 100, y: 50 }
// with a radius of 20:
var circle = new Path.Circle({
    center: [100, 50],
    radius: 20,
    fillColor: 'red'
});

// Scale the path horizontally by 300%
circle.scale(3, 1);
```
shear(shear[, center])
Shears the item by the given value from its center point, or optionally by a supplied point.
- Parameters:
- shear: Point — the horizontal and vertical shear factors as a point
- center: Point — optional, default: item.position
- See also:
- matrix.shear(shear[, center])
shear(hor, ver[, center])
Shears the item by the given values from its center point, or optionally by a supplied point.
- Parameters:
- hor: Number — the horizontal shear factor
- ver: Number — the vertical shear factor
- center: Point — optional, default: item.position
- See also:
- matrix.shear(hor, ver[, center])
skew(skew[, center])
Skews the item by the given angles from its center point, or optionally by a supplied point.
- Parameters:
- skew: Point — the horizontal and vertical skew angles in degrees
- center: Point — optional, default: item.position
- See also:
- matrix.shear(skew[, center])
skew(hor, ver[, center])
Skews the item by the given angles from its center point, or optionally by a supplied point.
- Parameters:
- hor: Number — the horizontal skew angle in degrees
- ver: Number — the vertical sskew angle in degrees
- center: Point — optional, default: item.position
- See also:
- matrix.shear(hor, ver[, center])
transform(matrix)
Transform the item.
- Parameters:
- matrix: Matrix — the matrix by which the item shall be transformed
globalToLocal(point)
Converts the specified point from global project coordinate space to the item’s own local coordinate space.
- Parameters:
- point: Point — the point to be transformed
- Returns:
- Point — the transformed point as a new instance
localToGlobal(point)
Converts the specified point from the item’s own local coordinate space to the global project coordinate space.
- Parameters:
- point: Point — the point to be transformed
- Returns:
- Point — the transformed point as a new instance
parentToLocal(point)
Converts the specified point from the parent’s coordinate space to item’s own local coordinate space.
- Parameters:
- point: Point — the point to be transformed
- Returns:
- Point — the transformed point as a new instance
localToParent(point)
Converts the specified point from the item’s own local coordinate space to the parent’s coordinate space.
- Parameters:
- point: Point — the point to be transformed
- Returns:
- Point — the transformed point as a new instance

fitBounds(rectangle[, fill])

Transform the item so that its bounds fit within the specified rectangle, without changing its aspect ratio.

Parameters:
rectangle: Rectangle
fill: Boolean — optional, default: false

Example:Fitting an item to the bounding rectangle of another item's bounding rectangle:

// Create a rectangle shaped path with its top left corner
// at {x: 80, y: 25} and a size of {width: 75, height: 50}:
var path = new Path.Rectangle({
    point: [80, 25],
    size: [75, 50],
    fillColor: 'black'
});

// Create a circle shaped path with its center at {x: 80, y: 50}
// and a radius of 30.
var circlePath = new Path.Circle({
    center: [80, 50],
    radius: 30,
    fillColor: 'red'
});

// Fit the circlePath to the bounding rectangle of
// the rectangular path:
circlePath.fitBounds(path.bounds);

Example:Fitting an item to the bounding rectangle of another item's bounding rectangle with the fill parameter set to true:

// Create a rectangle shaped path with its top left corner
// at {x: 80, y: 25} and a size of {width: 75, height: 50}:
var path = new Path.Rectangle({
    point: [80, 25],
    size: [75, 50],
    fillColor: 'black'
});

// Create a circle shaped path with its center at {x: 80, y: 50}
// and a radius of 30.
var circlePath = new Path.Circle({
    center: [80, 50],
    radius: 30,
    fillColor: 'red'
});

// Fit the circlePath to the bounding rectangle of
// the rectangular path:
circlePath.fitBounds(path.bounds, true);

Example:Fitting an item to the bounding rectangle of the view

var path = new Path.Circle({
    center: [80, 50],
    radius: 30,
    fillColor: 'red'
});

// Fit the path to the bounding rectangle of the view:
path.fitBounds(view.bounds);

Event Handling

on(type, function)
Attaches an event handler to the item.
- Parameters:
- type: String — the type of event: ‘frame’, mousedown’, ‘mouseup’, ‘mousedrag’, ‘click’, ‘doubleclick’, ‘mousemove’, ‘mouseenter’, ‘mouseleave’
- function: Function — the function to be called when the event occurs, receiving a MouseEvent or Event object as its sole argument
- Returns:
- Item — this item itself, so calls can be chained
Example:Change the fill color of the path to red when the mouse enters its shape and back to black again, when it leaves its shape.
```
// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25,
    fillColor: 'black'
});

// When the mouse enters the item, set its fill color to red:
path.on('mouseenter', function() {
    this.fillColor = 'red';
});

// When the mouse leaves the item, set its fill color to black:
path.on('mouseleave', function() {
    this.fillColor = 'black';
});
```

on(object)

Attaches one or more event handlers to the item.

Parameters:
object: Object — an object containing one or more of the following properties: frame, mousedown, mouseup, mousedrag, click, doubleclick, mousemove, mouseenter, mouseleave
Returns:
Item — this item itself, so calls can be chained

Example:Change the fill color of the path to red when the mouse enters its shape and back to black again, when it leaves its shape.

// Create a circle shaped path at the center of the view:
var path = new Path.Circle({
    center: view.center,
    radius: 25
});
path.fillColor = 'black';

// When the mouse enters the item, set its fill color to red:
path.on({
    mouseenter: function(event) {
        this.fillColor = 'red';
    },
    mouseleave: function(event) {
        this.fillColor = 'black';
    }
});

var pathHandlers = {
    mouseenter: function(event) {
        this.fillColor = 'red';
    },
    mouseleave: function(event) {
        this.fillColor = 'black';
    }
}

// When the mouse is pressed:
function onMouseDown(event) {
    // Create a circle shaped path at the position of the mouse:
    var path = new Path.Circle({
        center: event.point,
        radius: 25,
        fillColor: 'black'
    });

    // Attach the handers inside the object literal to the path:
    path.on(pathHandlers);
}

off(type, function)
Detach an event handler from the item.
- Parameters:
- type: String — the type of event: ‘frame’, mousedown’, ‘mouseup’, ‘mousedrag’, ‘click’, ‘doubleclick’, ‘mousemove’, ‘mouseenter’, ‘mouseleave’
- function: Function — the function to be detached
- Returns:
- Item — this item itself, so calls can be chained
off(object)
Detach one or more event handlers to the item.
- Parameters:
- object: Object — an object containing one or more of the following properties: frame, mousedown, mouseup, mousedrag, click, doubleclick, mousemove, mouseenter, mouseleave
- Returns:
- Item — this item itself, so calls can be chained
emit(type, event)
Emit an event on the item.
- Parameters:
- type: String — the type of event: ‘frame’, mousedown’, ‘mouseup’, ‘mousedrag’, ‘click’, ‘doubleclick’, ‘mousemove’, ‘mouseenter’, ‘mouseleave’
- event: Object — an object literal containing properties describing the event
- Returns:
- Boolean — true if the event had listeners, false otherwise
responds(type)
Check if the item has one or more event handlers of the specified type.
- Parameters:
- type: String — the type of event: ‘frame’, mousedown’, ‘mouseup’, ‘mousedrag’, ‘click’, ‘doubleclick’, ‘mousemove’, ‘mouseenter’, ‘mouseleave’
- Returns:
- Boolean — true if the item has one or more event handlers of the specified type, false otherwise

Remove On Event

removeOn(options)
Removes the item when the events specified in the passed options object occur.
- Options:
- options.move: undefined — {Boolean) remove the item when the next tool.onMouseMove event is fired.
- options.drag: undefined — {Boolena) remove the item when the next tool.onMouseDrag event is fired.
- options.down: undefined — {Boolean) remove the item when the next tool.onMouseDown event is fired.
- options.up: undefined — {Boolean) remove the item when the next tool.onMouseUp event is fired.
- Parameters:
- options: Object
Example:Click and drag below:
```
function onMouseDrag(event) {
    // Create a circle shaped path at the mouse position,
    // with a radius of 10:
    var path = new Path.Circle({
        center: event.point,
        radius: 10,
        fillColor: 'black'
    });

    // Remove the path on the next onMouseDrag or onMouseDown event:
    path.removeOn({
        drag: true,
        down: true
    });
}
```

removeOnMove()

Removes the item when the next tool.onMouseMove event is fired.

Example:Move your mouse below:

function onMouseMove(event) {
    // Create a circle shaped path at the mouse position,
    // with a radius of 10:
    var path = new Path.Circle({
        center: event.point,
        radius: 10,
        fillColor: 'black'
    });

    // On the next move event, automatically remove the path:
    path.removeOnMove();
}

removeOnDown()

Removes the item when the next tool.onMouseDown event is fired.

Example:Click a few times below:

function onMouseDown(event) {
    // Create a circle shaped path at the mouse position,
    // with a radius of 10:
    var path = new Path.Circle({
        center: event.point,
        radius: 10,
        fillColor: 'black'
    });

    // Remove the path, next time the mouse is pressed:
    path.removeOnDown();
}

removeOnDrag()

Removes the item when the next tool.onMouseDrag event is fired.

Example:Click and drag below:

function onMouseDrag(event) {
    // Create a circle shaped path at the mouse position,
    // with a radius of 10:
    var path = new Path.Circle({
        center: event.point,
        radius: 10,
        fillColor: 'black'
    });

    // On the next drag event, automatically remove the path:
    path.removeOnDrag();
}

removeOnUp()

Removes the item when the next tool.onMouseUp event is fired.

Example:Click a few times below:

function onMouseDown(event) {
    // Create a circle shaped path at the mouse position,
    // with a radius of 10:
    var path = new Path.Circle({
        center: event.point,
        radius: 10,
        fillColor: 'black'
    });

    // Remove the path, when the mouse is released:
    path.removeOnUp();
}

Tweening Functions

tween(from, to, options)
Tween item between two states.
- Options:
- options.duration: Number — the duration of the tweening
- options.easing: Function⟋String — an easing function or the type of the easing: ‘linear’ ‘easeInQuad’ ‘easeOutQuad’ ‘easeInOutQuad’ ‘easeInCubic’ ‘easeOutCubic’ ‘easeInOutCubic’ ‘easeInQuart’ ‘easeOutQuart’ ‘easeInOutQuart’ ‘easeInQuint’ ‘easeOutQuint’ ‘easeInOutQuint’ — default: ‘linear’
- options.start: Boolean — whether to start tweening automatically — default: true
- Parameters:
- from: Object — the state at the start of the tweening
- to: Object — the state at the end of the tweening
- options: Object⟋Number — the options or the duration
- Returns:
- Tween
Example:Tween fillColor:
```
var path = new Path.Circle({
    radius: view.bounds.height * 0.4,
    center: view.center
});
path.tween(
    { fillColor: 'blue' },
    { fillColor: 'red' },
    3000
);
```
Example:Tween rotation:
```
var path = new Shape.Rectangle({
    fillColor: 'red',
    center: [50, view.center.y],
    size: [60, 60]
});
path.tween({
    rotation: 180,
    'position.x': view.bounds.width - 50,
    'fillColor.hue': '+= 90'
}, {
    easing: 'easeInOutCubic',
    duration: 2000
});
```

tween(to, options)

Tween item to a state.

Parameters:
to: Object — the state at the end of the tweening
options: Object⟋Number — the options or the duration
Returns:
Tween
See also:
item.tween(from, to, options)

Example:Tween a nested property with relative values

var path = new Path.Rectangle({
    size: [100, 100],
    position: view.center,
    fillColor: 'red',
});

var delta = { x: path.bounds.width / 2, y: 0 };

path.tween({
    'segments[1].point': ['+=', delta],
    'segments[2].point.x': '-= 50'
}, 3000);

tween(options)

Tween item.

Parameters:
options: Object⟋Number — the options or the duration
Returns:
Tween
See also:
item.tween(from, to, options)

Example:Start an empty tween and just use the update callback:

var path = new Path.Circle({
    fillColor: 'blue',
    radius: view.bounds.height * 0.4,
    center: view.center,
});
var pathFrom = path.clone({ insert: false })
var pathTo = new Path.Rectangle({
    position: view.center,
    rectangle: path.bounds,
    insert: false
});
path.tween(2000).onUpdate = function(event) {
    path.interpolate(pathFrom, pathTo, event.factor)
};

tweenTo(to, options)
Tween item to a state.
- Parameters:
- to: Object — the state at the end of the tweening
- options: Object⟋Number — the options or the duration
- Returns:
- Tween
- See also:
- item.tween(to, options)
tweenFrom(from, options)
Tween item from a state to its state before the tweening.
- Parameters:
- from: Object — the state at the start of the tweening
- options: Object⟋Number — the options or the duration
- Returns:
- Tween
- See also:
- item.tween(from, to, options)
Example:Tween fillColor from red to the path's initial fillColor:
```
var path = new Path.Circle({
    fillColor: 'blue',
    radius: view.bounds.height * 0.4,
    center: view.center
});
path.tweenFrom({ fillColor: 'red' }, { duration: 1000 });
```

Properties inherited from `Group`

clipped

Specifies whether the group item is to be clipped. When setting to true, the first child in the group is automatically defined as the clipping mask.

Type:
Boolean

Example:

var star = new Path.Star({
    center: view.center,
    points: 6,
    radius1: 20,
    radius2: 40,
    fillColor: 'red'
});

var circle = new Path.Circle({
    center: view.center,
    radius: 25,
    strokeColor: 'black'
});

// Create a group of the two items and clip it:
var group = new Group(circle, star);
group.clipped = true;

// Lets animate the circle:
function onFrame(event) {
    var offset = Math.sin(event.count / 30) * 30;
    circle.position.x = view.center.x + offset;
}

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Constructors

Methods

Properties inherited from Item

Position and Bounding Boxes

Project Hierarchy

Stroke Style

Fill Style

Shadow Style

Selection Style

Event Handlers

Methods inherited from Item

Geometric Tests

Hit-testing, Fetching and Matching Items

Importing / Exporting JSON and SVG

Hierarchy Operations

Tests

Style Tests

Hierarchy Tests

Transform Functions

Event Handling

Remove On Event

Tweening Functions

Properties inherited from Group

Properties inherited from `Item`

Methods inherited from `Item`

Properties inherited from `Group`