SVG-Snap

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创建元素

Snap(...)

Snap(width,height)

Snap(SVGElement)

Snap(array of elements)

Snap(CSS query selector)

Paper.el(name, attr)

Creates an element on paper with a given name and no attributes

Paper.rect(x, y, width, height, [rx], [ry])

Draws a rectangle

Paper.circle(x, y, r)

Draws a circle

Paper.image(src, x, y, width, height)

Places an image on the surface

Paper.ellipse(x, y, rx, ry)

Draws an ellipse

Paper.text(x, y, text)

Draws a text string

Paper.path([pathString])

Creates a <path> element using the given string as the path’s definition

Paper.line(x1, y1, x2, y2)

Draws a line

Paper.polyline(array|varargs)

Draws a polyline.标签用来创建仅包含直线的形状

var p1 = paper.polyline([10, 10, 100, 100]);
var p2 = paper.polyline(10, 10, 100, 100);

Paper.polygon()

Draws a polygon. See Paper.polyline

Paper.g([varargs])

Paper.group()

Creates a group element

var c1 = paper.circle(),
    c2 = paper.rect(),
    g = paper.g(c2, c1); // note that the order of elements is different

or

var c1 = paper.circle(),
    c2 = paper.rect(),
    g = paper.g();
g.add(c2, c1);

Paper.mask() 蒙版

Equivalent in behaviour to Paper.g, except it’s a mask.

Element.marker(x, y, width, height, refX, refY)

Creates a <marker> element from the current element To create a marker you have to specify the bounding rect and reference point.marker-start, marker-end, marker-mid, and marker attributes.

Paper.ptrn(x, y, width, height, vbx, vby, vbw, vbh)

Equivalent in behaviour to Paper.g, except it’s a pattern.

Paper.use(id)

Creates a <use> element.

Paper.symbol(vbx, vby, vbw, vbh)

Creates a <symbol> element.

Element.clone()

Creates a clone of the element and inserts it after the element

Element.toDefs()

Moves element to the shared <defs> area

Element.toPattern(x, y, width, height)

Creates a <pattern> element from the current element To create a pattern you have to specify the pattern rect

Gradient

Paper.gradient(gradient)

Creates a gradient element

The gradient descriptor is an expression formatted as follows: <type>(<coords>)<colors>.

• The <type> can be either linear or radial.
• The uppercase L or R letters indicate absolute coordinates offset from the SVG surface. Lowercase l or r letters indicate coordinates calculated relative to the element to which the gradient is applied. Coordinates specify a linear gradient vector as x1, y1, x2, y2, or a radial gradient as cx, cy, r and optional fx, fy specifying a focal point away from the center of the circle.
• Specify <colors> as a list of dash-separated CSS color values. Each color may be followed by a custom offset value, separated with a colon character.

//Linear gradient, relative from top-left corner to bottom-right corner, from black through red to white
var g = paper.gradient("l(0, 0, 1, 1)#000-#f00-#fff");

//Linear gradient, absolute from (0, 0) to (100, 100), from black through red at 25% to white:
var g = paper.gradient("L(0, 0, 100, 100)#000-#f00:25-#fff");

//Radial gradient, relative from the center of the element with radius half the width, from black to white
var g = paper.gradient("r(0.5, 0.5, 0.5)#000-#fff");

//To apply the gradient:
paper.circle(50, 50, 40).attr({
    fill: g
});

Element.addStop(color, offset)

Only for gradients! Adds another stop to the gradient.

Element.setStops(str)

Only for gradients! Updates stops of the gradient based on passed gradient descriptor. See paper.gradient

Element.stops()

Only for gradients! Returns array of gradient stops elements.

Filter

Paper.filter(filstr)

Creates a <filter> element

Snap.filter.blur(x, [y])

Returns an SVG markup string for the blur filter

Snap.filter.shadow(…)

Returns an SVG markup string for the shadow filter

Parameters:

dx,dy,blur,color,opacity / dx,dy,color,opacity / dx,dy,pixels,opacity

Snap.filter.grayscale(amount)

Returns an SVG markup string for the grayscale filter

Snap.filter.sepia(amount)

Returns an SVG markup string for the sepia filter

Snap.filter.saturate(amount)

Returns an SVG markup string for the saturate filter

Snap.filter.hueRotate(angle)

Returns an SVG markup string for the hue-rotate filter

Snap.filter.invert(amount)

Returns an SVG markup string for the invert filter

Snap.filter.brightness(amount)

Returns an SVG markup string for the brightness filter

Snap.filter.contrast(amount)

Returns an SVG markup string for the contrast filter

Path

Paper.path([pathString])

Creates a <path> element using the given string as the path’s definition

Snap.path.getTotalLength(path)

Returns the length of the given path in pixels

Snap.path.getPointAtLength(path, length)

Returns the coordinates of the point located at the given length along the given path

Snap.path.getSubpath(path, from, to)

Returns the subpath of a given path between given start and end lengths

Snap.path.findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t)

Utility method Finds dot coordinates on the given cubic beziér curve at the given t

Snap.path.bezierBBox(…)

Utility method Returns the bounding box of a given cubic beziér curve

Snap.path.isPointInsideBBox(bbox, x, y)

Utility method Returns true if given point is inside bounding box

Snap.path.isBBoxIntersect(bbox1, bbox2)

Utility method Returns true if two bounding boxes intersect

Snap.path.intersection(path1, path2)

Utility method Finds intersections of two paths

Snap.path.isPointInside(path, x, y)

Utility method Returns true if given point is inside a given closed path.

Snap.path.getBBox(path)

Utility method Returns the bounding box of a given path

Snap.path.toRelative(path)

Utility method Converts path coordinates into relative value

Snap.path.toAbsolute(path)

Utility method Converts path coordinates into absolute values

Snap.path.toCubic(pathString)

Utility method Converts path to a new path where all segments are cubic beziér curves

Snap.path.map(path, matrix)

Transform the path string with the given matrix

Snap.closestPoint(path, x, y)

Returns closest point to a given one on a given path.

查找元素

Snap.select(query)

Wraps a DOM element specified by CSS selector as Element

Snap.selectAll(query)

Wraps DOM elements specified by CSS selector as set or array of Element

Element.select(query)

Gathers the nested Element matching the given set of CSS selectors

Element.selectAll(query)

Gathers nested Element objects matching the given set of CSS selectors

Fragment.select()

See Element.select

Fragment.selectAll()

See Element.selectAll

Element.node()

Gives you a reference to the DOM object, so you can assign event handlers or just mess around.

Element.children()

Returns array of all the children of the element.

Element.parent()

Returns the element’s parent

元素信息

Element.type()

SVG tag name of the given element.

Snap.getElementByPoint(x, y)

Returns you topmost element under given point.

Snap.getElementByPoint(mouseX, mouseY).attr({stroke: "#f00"});

Element.getBBox()

Returns the bounding box descriptor for the given element

Element.asPX(attr, [value])

Returns given attribute of the element as a px value (not %, em, etc.)

Element.data(key, [value])

Adds or retrieves given value associated with given key. (Don’t confuse with data- attributes)

Element.removeData([key])

Removes value associated with an element by given key. If key is not provided, removes all the data of the element.

操作元素

Element.outerSVG()

Returns SVG code for the element, equivalent to HTML’s outerHTML.

Element.innerSVG()

Paper.toString()

Returns SVG code for the Paper

Snap.deurl(value)

Unwraps path from “url(<path>)”.

Paper.toDataURL()

Returns SVG code for the Paper as Data URI string.

Element.toJSON()

Returns object representation of the given element and all its children.

Snap.ajax(…)

Simple implementation of Ajax

Snap.load(url, callback, [scope])

Loads external SVG file as a Fragment (see Snap.ajax for more advanced AJAX)

Paper.clear()

Removes all child nodes of the paper, except <defs>.

Element.attr(…)

Gets or sets given attributes of the element.

Element.transform(tstr)

Gets or sets transformation of the element

Element.parent()

Returns the element’s parent

Element.append(el)

Appends the given element to current one

Element.appendTo(el)

Appends the current element to the given one

Element.prepend(el)

Prepends the given element to the current one

Element.prependTo(el)

Prepends the current element to the given one

Element.before(el)

Inserts given element before the current one

Element.after(el)

Inserts given element after the current one

Element.insertBefore(el)

Inserts the element after the given one

Element.insertAfter(el)

Inserts the element after the given one

Element.remove()

Removes element from the DOM

事件

Element.click(handler)

Adds a click event handler to the element

Element.unclick(handler)

Removes a click event handler from the element

Element.dblclick(handler)

Adds a double click event handler to the element

Element.mousedown(handler)

Adds a mousedown event handler to the element

Element.mousemove(handler)

Adds a mousemove event handler to the element

Element.mouseout(handler)

Adds a mouseout event handler to the element

Element.mouseover(handler)

Adds a mouseover event handler to the element

Element.mouseup(handler)

Adds a mouseup event handler to the element

Element.touchstart(handler)

Adds a touchstart event handler to the element

Element.touchmove(handler)

Adds a touchmove event handler to the element

Element.touchend(handler)

Adds a touchend event handler to the element

Element.touchcancel(handler)

Adds a touchcancel event handler to the element

Element.hover(f_in, f_out, [icontext], [ocontext])

Adds hover event handlers to the element

Element.drag(onmove, onstart, onend, [mcontext], [scontext], [econtext])

Adds event handlers for an element’s drag gesture

动画

Snap.animate(from, to, setter, duration, [easing], [callback])

Runs generic animation of one number into another with a caring function

var rect = Snap().rect(0, 0, 10, 10);
Snap.animate(0, 10, function (val) {
    rect.attr({
        x: val
    });
}, 1000);
// in given context is equivalent to
rect.animate({x: 10}, 1000);

Element.animate(attrs, duration, [easing], [callback])

Animates the given attributes of the element

Element.inAnim()

Returns a set of animations that may be able to manipulate the current element

缓动函数

mina(a, A, b, B, get, set, [easing])

Generic animation of numbers

<svg id="svg" width="200" height="100"></svg>
            
<input id="button" type="button" class="zxx_api_button" value="点击运行">

var c = Snap("#svg").paper.circle(50,50,40).attr({ fill: "red" });

document.getElementById("button").onclick = function() {
    var now = mina.time();
    var ani = mina(50, 150, now, now + 1000, mina.time, function(val) {
        c.attr({
            cx: val   
        });
    }, mina.easeout);

    console.dir(ani);
};

mina.time()

Returns the current time. Equivalent to:

mina.getById(id)

Returns an animation by its id

mina.linear(n)

Default linear easing

mina.easeout(n)

Easeout easing

mina.easeout(n)

Easeout easing

mina.easein(n)` Easein easing

mina.easeinout(n)

Easeinout easing

mina.backin(n)

Backin easing

mina.backout(n)

Backout easing

mina.elastic(n)

Elastic easing

mina.bounce(n)

Bounce easing

矩阵

工具

格式解析

Snap.format(token, json)

Replaces construction of type {<name>} to the corresponding argument

// this draws a rectangular shape equivalent to "M10,20h40v50h-40z"
paper.path(Snap.format("M{x},{y}h{dim.width}v{dim.height}h{dim['negative width']}z", {
    x: 10,
    y: 20,
    dim: {
        width: 40,
        height: 50,
        "negative width": -40
    }
}));

Snap.url(value)

Wraps path into "url('<path>')".

Snap.is(o, type)`

Handy replacement for the typeof operator

距离

Snap.snapTo(values, value, [tolerance])`

Snaps given value to given grid 在指定的数组栅格中找到输入数值合适的数

tolerance：maximum distance to the target value that would trigger the snap. Default is 10.

Snap.snapTo([10,20,30,40], 11);
//输出：20
Snap.snapTo([10,20,30,40], 11,5);
//输出：10

Snap.closestPoint(path, x, y)

Returns closest point to a given one on a given path.

Snap.len(x1, y1, x2, y2)`

Returns distance between two points

Snap.len2(x1, y1, x2, y2)`

Returns squared distance between two points

Snap.parsePathString(pathString)

Utility method Parses given path string into an array of arrays of path segments

Snap.parsePathString('M42 56L75 56L75 636L108 636')

/*输出：
(4) [Array(3), Array(3), Array(3), Array(3), toString: ƒ]
0:(3) ["M", 42, 56]
1:(3) ["L", 75, 56]
2:(3) ["L", 75, 636]
3:(3) ["L", 108, 636]
*/

Snap.parseTransformString(TString)

Utility method Parses given transform string into an array of transformations

Snap.parseTransformString("t20,20s2,1,0,0");
/*输出：
(2) [Array(3), Array(5), toString: ƒ]
0:Array(3)
    0:"t"
    1:20
    2:20
    length:3
__proto__:Array(0)
1:Array(5)
    0:"s"
    1:2
    2:1
    3:0
    4:0
    length:5
__proto__:Array(0)
*/

弧度、角度

Snap.rad(deg)

Transform angle to radians 角度转换为弧度

Snap.deg(rad)

Transform angle to degrees 弧度转换为角度

Snap.sin(angle)

Equivalent to Math.sin() only works with degrees, not radians.

Snap.tan(angle)

Equivalent to Math.tan() only works with degrees, not radians.

Snap.cos(angle)

Equivalent to Math.cos() only works with degrees, not radians.

Snap.asin(num)

Equivalent to Math.asin() only works with degrees, not radians.

Snap.acos(num)

Equivalent to Math.acos() only works with degrees, not radians.

Snap.atan(num)

Equivalent to Math.atan() only works with degrees, not radians.

Snap.atan2(num)

Equivalent to Math.atan2() only works with degrees, not radians.

Snap.angle(x1, y1, x2, y2, [x3], [y3])

Returns an angle between two or three points

颜色

Snap.mui

Contain Material UI colours.

For colour reference

Snap().rect(0, 0, 10, 10).attr({fill: Snap.mui.deeppurple, stroke: Snap.mui.amber[600]});

Snap.flat

Contain Flat UI colours.

Snap().rect(0, 0, 10, 10).attr({fill: Snap.flat.carrot, stroke: Snap.flat.wetasphalt});

Snap.importMUIColors()

Imports Material UI colours into global object.

Snap.importMUIColors();
Snap().rect(0, 0, 10, 10).attr({fill: deeppurple, stroke: amber[600]});

Snap.color(clr)

Parses the color string and returns an object featuring the color’s component values

Snap.hsb(h, s, b)

Converts HSB values to a hex representation of the color

Snap.hsl(h, s, l)

Converts HSL values to a hex representation of the color

Snap.rgb(r, g, b)

Converts RGB values to a hex representation of the color

Snap.getRGB(color)

Parses color string as RGB object

Snap.hsb2rgb(h, s, v)

Converts HSB values to an RGB object

Snap.hsl2rgb(h, s, l)

Converts HSL values to an RGB object

Snap.rgb2hsb(r, g, b)

Converts RGB values to an HSB object

Snap.rgb2hsl(r, g, b)

Converts RGB values to an HSL object

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