Type.registerNamespace("Demo");

Demo.SlideShow = function() {
    this._slides = new Array();
    this._delay = 2000;
    this._currentIndex = 0;
    this._pause = false;
}

Demo.SlideShow.prototype =
{
    get_Slides: function() {
        return this._slides;
    },

    set_Slides: function(value) {
        this._slides = value;
    },

    get_Delay: function() {
        return this._delay;
    },

    set_Delay: function(value) {
        this._delay = value;
    },

    get_CurrentIndex: function() {
        return this._currentIndex;
    },

    set_CurrentIndex: function(value) {
        if (value < 0) {
            this._currentIndex = this._slides.length - 1;
            return;
        }
        if (value >= this._slides.length) {
            this._currentIndex = 0;
        }
        else {
            this._currentIndex = value;
        }
    },

    get_IsPaused: function() {
        return this._pause;
    },

    set_IsPaused: function(value) {
        this.pause = value;
    },

    Pause: function() {
        this._pause = true;
    },

    Play: function() {
        this._pause = false;
        window.setTimeout("slideshow.ShowImage()",
	this.get_Delay());
    },

    ShowFirst: function() {
        this._currentIndex = 0;
        this.ShowImage();
    },

    ShowLast: function() {
        this._currentIndex = this._slides.length - 1;
        this.ShowImage();
    },

    ShowNext: function() {
        var newIndex = this._currentIndex + 1;
        this.set_CurrentIndex(newIndex);
        this.ShowImage();
    },

    ShowPrevious: function() {
        var newIndex = this._currentIndex - 1;
        this.set_CurrentIndex(newIndex);
        this.ShowImage();
    },

    ShowImage: function() {
        var img = $get("Image1");
        if (img.style.visibility == "hidden") {
            img.style.visibility = "visible";
        }
        var slides = this.get_Slides();
        var curIndex = this.get_CurrentIndex();
        img.src = slides[curIndex];
        if (this.get_IsPaused() == false) {
            this.set_CurrentIndex(curIndex + 1);
            this.Play();
        }
    }
}


Demo.SlideShow.registerClass("Demo.SlideShow");

var slideshow = new Demo.SlideShow();