/**
 Script: Slideshow.KenBurns.js
 Slideshow.KenBurns - KenBurns extension for Slideshow, includes zooming and panning effects.
 License:
 MIT-style license.
 Copyright:
 Copyright (c) 2008 [Aeron Glemann](http://www.electricprism.com/aeron/).
 */
Slideshow.KenBurns = new Class({
    Extends: Slideshow,
    options: {
        pan: [100, 100],
        zoom: [50, 50]
    },
    initialize: function(B, C, A){
        A.overlap = true;
        A.resize = true;
        ["pan", "zoom"].each(function(D){
            if ($chk(this[D])) {
                if ($type(this[D]) != "array") {
                    this[D] = [this[D], this[D]]
                }
                this[D].map(function(E){
                    return (E.toInt() || 0).limit(0, 100)
                })
            }
        }, A);
        this.parent(B, C, A)
    },
    _show: function(B){
        if (!this.image.retrieve("morph")) {
            ["a", "b"].each(function(G){
                this[G].set("tween", {
                    duration: this.options.duration,
                    link: "cancel",
                    onStart: this._start.bind(this),
                    onComplete: this._complete.bind(this),
                    property: "opacity"
                }).get("morph", {
                    duration: (this.options.delay + this.options.duration * 2),
                    link: "cancel",
                    transition: $arguments(0)
                })
            }, this)
        }
        this.image.set("styles", {
            bottom: "auto",
            left: "auto",
            right: "auto",
            top: "auto"
        });
        var D = ["top left", "top right", "bottom left", "bottom right"][this.counter % 4].split(" ");
        D.each(function(G){
            this.image.setStyle(G, 0)
        }, this);
        dh = this.height / this.preloader.height;
        dw = this.width / this.preloader.width;
        delta = (dw > dh) ? dw : dh;
        var A = {};
        var E = ($random.run(this.options.zoom) / 100) + 1;
        var F = Math.abs(($random.run(this.options.pan) / 100) - 1);
        ["height", "width"].each(function(J, G){
            var I = Math.ceil(this.preloader[J] * delta);
            var H = (I * E).toInt();
            A[J] = [H, I];
            if (dw > dh || G) {
                I = (this[J] - this.image[J]);
                H = (I * F).toInt();
                A[D[G]] = [H, I]
            }
        }, this);
        var C = (this.firstrun && this.options.paused);
        if (B || C) {
            this._center(this.image);
            this.image.get("morph").cancel();
            if (C) {
                this.image.get("tween").cancel().set(0).start(1)
            }
            else {
                this.image.get("tween").cancel().set(1)
            }
        }
        else {
            this.image.get("morph").start(A);
            this.image.get("tween").set(0).start(1)
        }
    }
});