/**
+ * @class Ext.fx.Anim
+ *
+ * This class manages animation for a specific {@link #target}. The animation allows
+ * animation of various properties on the target, such as size, position, color and others.
+ *
+ * ## Starting Conditions
+ * The starting conditions for the animation are provided by the {@link #from} configuration.
+ * Any/all of the properties in the {@link #from} configuration can be specified. If a particular
+ * property is not defined, the starting value for that property will be read directly from the target.
+ *
+ * ## End Conditions
+ * The ending conditions for the animation are provided by the {@link #to} configuration. These mark
+ * the final values once the animations has finished. The values in the {@link #from} can mirror
+ * those in the {@link #to} configuration to provide a starting point.
+ *
+ * ## Other Options
+ * - {@link #duration}: Specifies the time period of the animation.
+ * - {@link #easing}: Specifies the easing of the animation.
+ * - {@link #iterations}: Allows the animation to repeat a number of times.
+ * - {@link #alternate}: Used in conjunction with {@link #iterations}, reverses the direction every second iteration.
+ *
+ * ## Example Code
+ *
+ * var myComponent = Ext.create('Ext.Component', {
+ * renderTo: document.body,
+ * width: 200,
+ * height: 200,
+ * style: 'border: 1px solid red;'
+ * });
+ *
+ * new Ext.fx.Anim({
+ * target: myComponent,
+ * duration: 1000,
+ * from: {
+ * width: 400 //starting width 400
+ * },
+ * to: {
+ * width: 300, //end width 300
+ * height: 300 // end width 300
+ * }
+ * });
+ */
+Ext.define('Ext.fx.Anim', {
+
+ /* Begin Definitions */
+
+ mixins: {
+ observable: 'Ext.util.Observable'
+ },
+
+ requires: ['Ext.fx.Manager', 'Ext.fx.Animator', 'Ext.fx.Easing', 'Ext.fx.CubicBezier', 'Ext.fx.PropertyHandler'],
+
+ /* End Definitions */
+
+ isAnimation: true,
+ /**
+ * @cfg {Number} duration
+ * Time in milliseconds for a single animation to last. Defaults to 250. If the {@link #iterations} property is
+ * specified, then each animate will take the same duration for each iteration.
+ */
+ duration: 250,
+
+ /**
+ * @cfg {Number} delay
+ * Time to delay before starting the animation. Defaults to 0.
+ */
+ delay: 0,
+
+ /* private used to track a delayed starting time */
+ delayStart: 0,
+
+ /**
+ * @cfg {Boolean} dynamic
+ * Currently only for Component Animation: Only set a component's outer element size bypassing layouts. Set to true to do full layouts for every frame of the animation. Defaults to false.
+ */
+ dynamic: false,
+
+ /**
+ * @cfg {String} easing
+This describes how the intermediate values used during a transition will be calculated. It allows for a transition to change
+speed over its duration.
+
+ -backIn
+ -backOut
+ -bounceIn
+ -bounceOut
+ -ease
+ -easeIn
+ -easeOut
+ -easeInOut
+ -elasticIn
+ -elasticOut
+ -cubic-bezier(x1, y1, x2, y2)
+
+Note that cubic-bezier will create a custom easing curve following the CSS3 transition-timing-function specification `{@link http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag}`. The four values specify points P1 and P2 of the curve
+as (x1, y1, x2, y2). All values must be in the range [0, 1] or the definition is invalid.
+ * @markdown
+ */
+ easing: 'ease',
+
+ /**
+ * @cfg {Object} keyframes
+ * Animation keyframes follow the CSS3 Animation configuration pattern. 'from' is always considered '0%' and 'to'
+ * is considered '100%'.<b>Every keyframe declaration must have a keyframe rule for 0% and 100%, possibly defined using
+ * "from" or "to"</b>. A keyframe declaration without these keyframe selectors is invalid and will not be available for
+ * animation. The keyframe declaration for a keyframe rule consists of properties and values. Properties that are unable to
+ * be animated are ignored in these rules, with the exception of 'easing' which can be changed at each keyframe. For example:
+ <pre><code>
+keyframes : {
+ '0%': {
+ left: 100
+ },
+ '40%': {
+ left: 150
+ },
+ '60%': {
+ left: 75
+ },
+ '100%': {
+ left: 100
+ }
+}
+ </code></pre>
+ */
+
+ /**
+ * @private
+ */
+ damper: 1,
+
+ /**
+ * @private
+ */
+ bezierRE: /^(?:cubic-)?bezier\(([^,]+),([^,]+),([^,]+),([^\)]+)\)/,
+
+ /**
+ * Run the animation from the end to the beginning
+ * Defaults to false.
+ * @cfg {Boolean} reverse
+ */
+ reverse: false,
+
+ /**
+ * Flag to determine if the animation has started
+ * @property running
+ * @type boolean
+ */
+ running: false,
+
+ /**
+ * Flag to determine if the animation is paused. Only set this to true if you need to
+ * keep the Anim instance around to be unpaused later; otherwise call {@link #end}.
+ * @property paused
+ * @type boolean
+ */
+ paused: false,
+
+ /**
+ * Number of times to execute the animation. Defaults to 1.
+ * @cfg {int} iterations
+ */
+ iterations: 1,
+
+ /**
+ * Used in conjunction with iterations to reverse the animation each time an iteration completes.
+ * @cfg {Boolean} alternate
+ * Defaults to false.
+ */
+ alternate: false,
+
+ /**
+ * Current iteration the animation is running.
+ * @property currentIteration
+ * @type int
+ */
+ currentIteration: 0,
+
+ /**
+ * Starting time of the animation.
+ * @property startTime
+ * @type Date
+ */
+ startTime: 0,
+
+ /**
+ * Contains a cache of the interpolators to be used.
+ * @private
+ * @property propHandlers
+ * @type Object
+ */
+
+ /**
+ * @cfg {String/Object} target
+ * The {@link Ext.fx.target.Target} to apply the animation to. This should only be specified when creating an Ext.fx.Anim directly.
+ * The target does not need to be a {@link Ext.fx.target.Target} instance, it can be the underlying object. For example, you can
+ * pass a Component, Element or Sprite as the target and the Anim will create the appropriate {@link Ext.fx.target.Target} object
+ * automatically.
+ */
+
+ /**
+ * @cfg {Object} from
+ * An object containing property/value pairs for the beginning of the animation. If not specified, the current state of the
+ * Ext.fx.target will be used. For example:
+<pre><code>
+from : {
+ opacity: 0, // Transparent
+ color: '#ffffff', // White
+ left: 0
+}
+</code></pre>
+ */
+
+ /**
+ * @cfg {Object} to
+ * An object containing property/value pairs for the end of the animation. For example:
+ <pre><code>
+ to : {
+ opacity: 1, // Opaque
+ color: '#00ff00', // Green
+ left: 500
+ }
+ </code></pre>
+ */
+
+ // @private
+ constructor: function(config) {
+ var me = this;
+ config = config || {};
+ // If keyframes are passed, they really want an Animator instead.
+ if (config.keyframes) {
+ return Ext.create('Ext.fx.Animator', config);
+ }
+ config = Ext.apply(me, config);
+ if (me.from === undefined) {
+ me.from = {};
+ }
+ me.propHandlers = {};
+ me.config = config;
+ me.target = Ext.fx.Manager.createTarget(me.target);
+ me.easingFn = Ext.fx.Easing[me.easing];
+ me.target.dynamic = me.dynamic;
+
+ // If not a pre-defined curve, try a cubic-bezier
+ if (!me.easingFn) {
+ me.easingFn = String(me.easing).match(me.bezierRE);
+ if (me.easingFn && me.easingFn.length == 5) {
+ var curve = me.easingFn;
+ me.easingFn = Ext.fx.cubicBezier(+curve[1], +curve[2], +curve[3], +curve[4]);
+ }
+ }
+ me.id = Ext.id(null, 'ext-anim-');
+ Ext.fx.Manager.addAnim(me);
+ me.addEvents(
+ /**
+ * @event beforeanimate
+ * Fires before the animation starts. A handler can return false to cancel the animation.
+ * @param {Ext.fx.Anim} this
+ */
+ 'beforeanimate',
+ /**
+ * @event afteranimate
+ * Fires when the animation is complete.
+ * @param {Ext.fx.Anim} this
+ * @param {Date} startTime
+ */
+ 'afteranimate',
+ /**
+ * @event lastframe
+ * Fires when the animation's last frame has been set.
+ * @param {Ext.fx.Anim} this
+ * @param {Date} startTime
+ */
+ 'lastframe'
+ );
+ me.mixins.observable.constructor.call(me, config);
+ if (config.callback) {
+ me.on('afteranimate', config.callback, config.scope);
+ }
+ return me;
+ },
+
+ /**
+ * @private
+ * Helper to the target
+ */
+ setAttr: function(attr, value) {
+ return Ext.fx.Manager.items.get(this.id).setAttr(this.target, attr, value);
+ },
+
+ /*
+ * @private
+ * Set up the initial currentAttrs hash.
+ */
+ initAttrs: function() {
+ var me = this,
+ from = me.from,
+ to = me.to,
+ initialFrom = me.initialFrom || {},
+ out = {},
+ start, end, propHandler, attr;
+
+ for (attr in to) {
+ if (to.hasOwnProperty(attr)) {
+ start = me.target.getAttr(attr, from[attr]);
+ end = to[attr];
+ // Use default (numeric) property handler
+ if (!Ext.fx.PropertyHandler[attr]) {
+ if (Ext.isObject(end)) {
+ propHandler = me.propHandlers[attr] = Ext.fx.PropertyHandler.object;
+ } else {
+ propHandler = me.propHandlers[attr] = Ext.fx.PropertyHandler.defaultHandler;
+ }
+ }
+ // Use custom handler
+ else {
+ propHandler = me.propHandlers[attr] = Ext.fx.PropertyHandler[attr];
+ }
+ out[attr] = propHandler.get(start, end, me.damper, initialFrom[attr], attr);
+ }
+ }
+ me.currentAttrs = out;
+ },
+
+ /*
+ * @private
+ * Fires beforeanimate and sets the running flag.
+ */
+ start: function(startTime) {
+ var me = this,
+ delay = me.delay,
+ delayStart = me.delayStart,
+ delayDelta;
+ if (delay) {
+ if (!delayStart) {
+ me.delayStart = startTime;
+ return;
+ }
+ else {
+ delayDelta = startTime - delayStart;
+ if (delayDelta < delay) {
+ return;
+ }
+ else {
+ // Compensate for frame delay;
+ startTime = new Date(delayStart.getTime() + delay);
+ }
+ }
+ }
+ if (me.fireEvent('beforeanimate', me) !== false) {
+ me.startTime = startTime;
+ if (!me.paused && !me.currentAttrs) {
+ me.initAttrs();
+ }
+ me.running = true;
+ }
+ },
+
+ /*
+ * @private
+ * Calculate attribute value at the passed timestamp.
+ * @returns a hash of the new attributes.
+ */
+ runAnim: function(elapsedTime) {
+ var me = this,
+ attrs = me.currentAttrs,
+ duration = me.duration,
+ easingFn = me.easingFn,
+ propHandlers = me.propHandlers,
+ ret = {},
+ easing, values, attr, lastFrame;
+
+ if (elapsedTime >= duration) {
+ elapsedTime = duration;
+ lastFrame = true;
+ }
+ if (me.reverse) {
+ elapsedTime = duration - elapsedTime;
+ }
+
+ for (attr in attrs) {
+ if (attrs.hasOwnProperty(attr)) {
+ values = attrs[attr];
+ easing = lastFrame ? 1 : easingFn(elapsedTime / duration);
+ ret[attr] = propHandlers[attr].set(values, easing);
+ }
+ }
+ return ret;
+ },
+
+ /*
+ * @private
+ * Perform lastFrame cleanup and handle iterations
+ * @returns a hash of the new attributes.
+ */
+ lastFrame: function() {
+ var me = this,
+ iter = me.iterations,
+ iterCount = me.currentIteration;
+
+ iterCount++;
+ if (iterCount < iter) {
+ if (me.alternate) {
+ me.reverse = !me.reverse;
+ }
+ me.startTime = new Date();
+ me.currentIteration = iterCount;
+ // Turn off paused for CSS3 Transitions
+ me.paused = false;
+ }
+ else {
+ me.currentIteration = 0;
+ me.end();
+ me.fireEvent('lastframe', me, me.startTime);
+ }
+ },
+
+ /*
+ * Fire afteranimate event and end the animation. Usually called automatically when the
+ * animation reaches its final frame, but can also be called manually to pre-emptively
+ * stop and destroy the running animation.
+ */
+ end: function() {
+ var me = this;
+ me.startTime = 0;
+ me.paused = false;
+ me.running = false;
+ Ext.fx.Manager.removeAnim(me);
+ me.fireEvent('afteranimate', me, me.startTime);
+ }
+});
+// Set flag to indicate that Fx is available. Class might not be available immediately.
+Ext.enableFx = true;
+