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SVG.FX = function(element) {
/* store target element */
this.target = element
}
//
SVG.extend(SVG.FX, {
// Add animation parameters and start animation
animate: function(d, ease, delay) {
var akeys, tkeys, skeys, key
, element = this.target
, fx = this
/* dissect object if one is passed */
if (typeof d == 'object') {
delay = d.delay
ease = d.ease
d = d.duration
}
/* ensure default duration and easing */
d = d == null ? 1000 : d
ease = ease || '<>'
/* process values */
fx.to = function(pos) {
var i
/* normalise pos */
pos = pos < 0 ? 0 : pos > 1 ? 1 : pos
/* collect attribute keys */
if (akeys == null) {
akeys = []
for (key in fx.attrs)
akeys.push(key)
/* make sure morphable elements are scaled, translated and morphed all together */
if (element.morphArray && akeys.indexOf('points') > -1) {
/* get destination */
var box
, p = new element.morphArray(fx._plot || element.array)
/* add size */
if (fx._size) p.size(fx._size.width.to, fx._size.height.to)
/* add movement */
box = p.bbox()
if (fx._x) p.move(fx._x.to, box.y)
else if (fx._cx) p.move(fx._cx.to - box.width / 2, box.y)
box = p.bbox()
if (fx._y) p.move(box.x, fx._y.to)
else if (fx._cy) p.move(box.x, fx._cy.to - box.height / 2)
/* delete element oriented changes */
delete fx._x
delete fx._y
delete fx._cx
delete fx._cy
delete fx._size
fx._plot = element.array.morph(p)
}
}
/* collect transformation keys */
if (tkeys == null) {
tkeys = []
for (key in fx.trans)
tkeys.push(key)
}
/* collect style keys */
if (skeys == null) {
skeys = []
for (key in fx.styles)
skeys.push(key)
}
/* apply easing */
pos = ease == '<>' ?
(-Math.cos(pos * Math.PI) / 2) + 0.5 :
ease == '>' ?
Math.sin(pos * Math.PI / 2) :
ease == '<' ?
-Math.cos(pos * Math.PI / 2) + 1 :
ease == '-' ?
pos :
typeof ease == 'function' ?
ease(pos) :
pos
/* run plot function */
if (fx._plot) {
element.plot(fx._plot.at(pos))
} else {
if (element.array)
element.array.cache()
/* run all x-position properties */
if (fx._x)
element.x(fx._at(fx._x, pos))
else if (fx._cx)
element.cx(fx._at(fx._cx, pos))
/* run all y-position properties */
if (fx._y)
element.y(fx._at(fx._y, pos))
else if (fx._cy)
element.cy(fx._at(fx._cy, pos))
/* run all size properties */
if (fx._size)
element.size(fx._at(fx._size.width, pos), fx._at(fx._size.height, pos))
if (element.array)
element.array.uncache()
}
/* run all viewbox properties */
if (fx._viewbox)
element.viewbox(
fx._at(fx._viewbox.x, pos)
, fx._at(fx._viewbox.y, pos)
, fx._at(fx._viewbox.width, pos)
, fx._at(fx._viewbox.height, pos)
)
/* animate attributes */
for (i = akeys.length - 1; i >= 0; i--)
element.attr(akeys[i], fx._at(fx.attrs[akeys[i]], pos))
/* animate transformations */
for (i = tkeys.length - 1; i >= 0; i--)
element.transform(tkeys[i], fx._at(fx.trans[tkeys[i]], pos))
/* animate styles */
for (i = skeys.length - 1; i >= 0; i--)
element.style(skeys[i], fx._at(fx.styles[skeys[i]], pos))
/* callback for each keyframe */
if (fx._during)
fx._during.call(element, pos, function(from, to) {
return fx._at({ from: from, to: to }, pos)
})
}
if (typeof d === 'number') {
/* delay animation */
this.timeout = setTimeout(function() {
var start = new Date().getTime()
/* initialize situation object */
fx.situation = {
interval: 1000 / 60
, start: start
, play: true
, finish: start + d
, duration: d
}
/* render function */
fx.render = function(){
if (fx.situation.play === true) {
// This code was borrowed from the emile.js micro framework by Thomas Fuchs, aka MadRobby.
var time = new Date().getTime()
, pos = time > fx.situation.finish ? 1 : (time - fx.situation.start) / d
/* process values */
fx.to(pos)
/* finish off animation */
if (time > fx.situation.finish) {
if (fx._plot)
element.plot(new SVG.PointArray(fx._plot.destination).settle())
if (fx._loop === true || (typeof fx._loop == 'number' && fx._loop > 1)) {
if (typeof fx._loop == 'number')
--fx._loop
fx.animate(d, ease, delay)
} else {
fx._after ? fx._after.apply(element, [fx]) : fx.stop()
}
} else {
requestAnimFrame(fx.render)
}
} else {
requestAnimFrame(fx.render)
}
}
/* start animation */
fx.render()
}, delay || 0)
}
return this
}
// Get bounding box of target element
, bbox: function() {
return this.target.bbox()
}
// Add animatable attributes
, attr: function(a, v, n) {
if (typeof a == 'object') {
for (var key in a)
this.attr(key, a[key])
} else {
var from = this.target.attr(a)
this.attrs[a] = SVG.Color.isColor(from) ?
new SVG.Color(from).morph(v) :
{ from: from, to: v }
}
return this
}
// Add animatable transformations
, transform: function(o, v) {
if (arguments.length == 1) {
/* parse matrix string */
o = this.target._parseMatrix(o)
/* dlete matrixstring from object */
delete o.matrix
/* store matrix values */
for (v in o)
this.trans[v] = { from: this.target.trans[v], to: o[v] }
} else {
/* apply transformations as object if key value arguments are given*/
var transform = {}
transform[o] = v
this.transform(transform)
}
return this
}
// Add animatable styles
, style: function(s, v) {
if (typeof s == 'object')
for (var key in s)
this.style(key, s[key])
else
this.styles[s] = { from: this.target.style(s), to: v }
return this
}
// Animatable x-axis
, x: function(x) {
this._x = { from: this.target.x(), to: x }
return this
}
// Animatable y-axis
, y: function(y) {
this._y = { from: this.target.y(), to: y }
return this
}
// Animatable center x-axis
, cx: function(x) {
this._cx = { from: this.target.cx(), to: x }
return this
}
// Animatable center y-axis
, cy: function(y) {
this._cy = { from: this.target.cy(), to: y }
return this
}
// Add animatable move
, move: function(x, y) {
return this.x(x).y(y)
}
// Add animatable center
, center: function(x, y) {
return this.cx(x).cy(y)
}
// Add animatable size
, size: function(width, height) {
if (this.target instanceof SVG.Text) {
/* animate font size for Text elements */
this.attr('font-size', width)
} else {
/* animate bbox based size for all other elements */
var box = this.target.bbox()
this._size = {
width: { from: box.width, to: width }
, height: { from: box.height, to: height }
}
}
return this
}
// Add animatable plot
, plot: function(p) {
this._plot = p
return this
}
// Add animatable viewbox
, viewbox: function(x, y, width, height) {
if (this.target instanceof SVG.Container) {
var box = this.target.viewbox()
this._viewbox = {
x: { from: box.x, to: x }
, y: { from: box.y, to: y }
, width: { from: box.width, to: width }
, height: { from: box.height, to: height }
}
}
return this
}
// Add animateable gradient update
, update: function(o) {
if (this.target instanceof SVG.Stop) {
if (o.opacity != null) this.attr('stop-opacity', o.opacity)
if (o.color != null) this.attr('stop-color', o.color)
if (o.offset != null) this.attr('offset', new SVG.Number(o.offset))
}
return this
}
// Add callback for each keyframe
, during: function(during) {
this._during = during
return this
}
// Callback after animation
, after: function(after) {
this._after = after
return this
}
// Make loopable
, loop: function(times) {
this._loop = times || true
return this
}
// Stop running animation
, stop: function() {
/* stop current animation */
clearTimeout(this.timeout)
clearInterval(this.interval)
/* reset storage for properties that need animation */
this.attrs = {}
this.trans = {}
this.styles = {}
this.situation = {}
delete this._x
delete this._y
delete this._cx
delete this._cy
delete this._size
delete this._plot
delete this._loop
delete this._after
delete this._during
delete this._viewbox
return this
}
// Pause running animation
, pause: function() {
if (this.situation.play === true) {
this.situation.play = false
this.situation.pause = new Date().getTime()
}
return this
}
// Play running animation
, play: function() {
if (this.situation.play === false) {
var pause = new Date().getTime() - this.situation.pause
this.situation.finish += pause
this.situation.start += pause
this.situation.play = true
}
return this
}
// Private: calculate position according to from and to
, _at: function(o, pos) {
/* number recalculation */
return typeof o.from == 'number' ?
o.from + (o.to - o.from) * pos :
/* unit recalculation */
SVG.regex.unit.test(o.to) ?
new SVG.Number(o.to)
.minus(new SVG.Number(o.from))
.times(pos)
.plus(new SVG.Number(o.from)) :
/* color recalculation */
o instanceof SVG.Color ? o.at(pos) :
/* for all other values wait until pos has reached 1 to return the final value */
pos < 1 ? o.from : o.to
}
})
//
SVG.extend(SVG.Element, {
// Get fx module or create a new one, then animate with given duration and ease
animate: function(d, ease, delay) {
return (this.fx || (this.fx = new SVG.FX(this))).stop().animate(d, ease, delay)
}
// Stop current animation; this is an alias to the fx instance
, stop: function() {
if (this.fx)
this.fx.stop()
return this
}
// Pause current animation
, pause: function() {
if (this.fx)
this.fx.pause()
return this
}
// Play paused current animation
, play: function() {
if (this.fx)
this.fx.play()
return this
}
})
// Usage:
// rect.animate(1500, '>').move(200, 300).after(function() {
// this.fill({ color: '#f06' })
// })
// Shim layer with setTimeout fallback by Paul Irish
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (c) { window.setTimeout(c, 1000 / 60) }
})()
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