/* =========================================================

// jquery.innerfade.js

// Datum: 2008-02-14
// Firma: Medienfreunde Hofmann & Baldes GbR
// Author: Torsten Baldes
// Mail: t.baldes@medienfreunde.com
// Web: http://medienfreunde.com

// based on the work of Matt Oakes http://portfolio.gizone.co.uk/applications/slideshow/
// and Ralf S. Engelschall http://trainofthoughts.org/

 *
 *  <ul id="news"> 
 *      <li>content 1</li>
 *      <li>content 2</li>
 *      <li>content 3</li>
 *  </ul>
 *  
 *  $('#news').innerfade({ 
 *	  animationtype: Type of animation 'fade' or 'slide' (Default: 'fade'), 
 *	  speed: Fading-/Sliding-Speed in milliseconds or keywords (slow, normal or fast) (Default: 'normal'), 
 *	  timeout: Time between the fades in milliseconds (Default: '2000'), 
 *	  type: Type of slideshow: 'sequence', 'random' or 'random_start' (Default: 'sequence'), 
 * 		containerheight: Height of the containing element in any css-height-value (Default: 'auto'),
 *	  runningclass: CSS-Class which the container get’s applied (Default: 'innerfade'),
 *	  children: optional children selector (Default: null)
 *  }); 
 *

// ========================================================= */


(function($) {

    $.fn.innerfade = function(options) {
        return this.each(function() {   
            $.innerfade(this, options);
        });
    };

    $.innerfade = function(container, options) {
        var settings = {
    		'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          8000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null,
            'btnNext':          null,
            'btnPrev':          null,
            'channel':           null,
			'ico_channel_active' : null,
			'ico_channel_normal' : null
        };
		
        if (options)
            $.extend(settings, options);
        if (settings.children === null)
            var elements = $(container).children();
        else
            var elements = $(container).children(settings.children);
        if (elements.length > 1) {
            $(container).css('position', 'relative').css('height', settings.containerheight).addClass(settings.runningclass);
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').hide();
            };
            if (settings.type == "sequence") {
                setTimeout(function() {
                    $.innerfade.next(elements, settings, 1, 0);
                }, settings.timeout);
                $(elements[0]).show();
            } else if (settings.type == "random") {
            	var last = Math.floor ( Math.random () * ( elements.length ) );
                setTimeout(function() {
                    do {
						current = Math.floor ( Math.random ( ) * ( elements.length ) );
					} while (last == current );
					$.innerfade.next(elements, settings, current, last);
                }, settings.timeout);
                $(elements[last]).show();
			} else if ( settings.type == 'random_start' ) {
				settings.type = 'sequence';
				var current = Math.floor ( Math.random () * ( elements.length ) );
				setTimeout(function(){
					$.innerfade.next(elements, settings, (current + 1) %  elements.length, current);
				}, settings.timeout);
				$(elements[current]).show();

            /* 2009.09.19 機能追加 ボタンのクリックで切り替わるように */
			} else if (settings.type == "btnClick") {
                $.innerfade.setControllBtn(container , elements , settings);
                $(elements[0]).show();
				$("#channel1 img").attr("src" , settings.ico_channel_active);
            } else {
				alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
			}
			
		}
    };

    $.innerfade.next = function(elements, settings, current, last) {
        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed, function() {
				removeFilter($(this)[0]);
			});
        } else
            alert('Innerfade-animationtype must either be \'slide\' or \'fade\'');
        if (settings.type == "sequence") {
            if ((current + 1) < elements.length) {
                current = current + 1;
                last = current - 1;
            } else {
                current = 0;
                last = elements.length - 1;
            }
        } else if (settings.type == "random") {
            last = current;
            while (current == last)
                current = Math.floor(Math.random() * elements.length);
        } else
            alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
        setTimeout((function() {
            $.innerfade.next(elements, settings, current, last);
        }), settings.timeout);
    };
    


	/* 2009.09.24 機能追加 ボタンのクリックで切り替わるように */
    $.innerfade.change = function(evt) {
    	
		var container = evt.data.container;
		var current = $(container).data("active");
		var last;
		var elements = evt.data.element;
		var settings = evt.data.setting;
		
		if(evt.data.type == "next") {
			
			if ((current + 1) < elements.length) {
                current = current + 1;
                last = current - 1;
            } else {
                current = 0;
                last = elements.length - 1;
            }
			
		}else if(evt.data.type == "prev") {
			
			if ((current - 1) >= 0) {
                current = current - 1;
                last = current + 1;
            } else {
                current = elements.length -1;
                last = 0;
            }
		}
		
		if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed ,function() {
				$(container).data("active" , current);			
				$.innerfade.changeChannel($(container).data("active")+1 , settings);										
			});
        } else if (settings.animationtype == 'fade') {
			
            $(elements[last]).fadeOut(settings.speed);
            $(elements[current]).fadeIn(settings.speed, function() {
				removeFilter($(this)[0]);
				$(container).data("active" , current);
				$.innerfade.changeChannel($(container).data("active")+1 , settings);
			});
        } 
		
		
    };
    
    $.innerfade.setControllBtn = function(container , elements, settings) {
        
		$(container).data("active" , 0);
		
		if(settings.btnNext != null) {
			/*
			if(active != elements.length -1 ){
				$(settings.btnNext).bind("click" , {element:elements , type:"next" , setting:settings , active:active} , $.innerfade.change);
				$(settings.btnNext).css("cursor" , "pointer");
			}else{
				$(settings.btnNext).unbind("click" , $.innerfade.change);
				$(settings.btnNext).css("cursor" , "default");
			}
			*/
			$(settings.btnNext).bind("click" , {element:elements , type:"next" , setting:settings , container:container} , $.innerfade.change);
			$(settings.btnNext).css("cursor" , "pointer");
		}
        
		if(settings.btnPrev != null) {
			/*
			if(active > 0){
				$(settings.btnPrev).bind("click" , {element:elements , type:"prev" , setting:settings , active:active} , $.innerfade.change);
				$(settings.btnNext).css("cursor" , "pointer");
			}else{
				$(settings.btnPrev).unbind("click" , $.innerfade.change);
				$(settings.btnNext).css("cursor" , "default");
			}
			*/
			$(settings.btnPrev).bind("click" , {element:elements , type:"prev" , setting:settings , container:container} , $.innerfade.change);
			$(settings.btnPrev).css("cursor" , "pointer");
		}
    };
	$.innerfade.changeChannel = function( active , settings ) {
		
		var num = 1;
		if(settings.ico_channel_normal != null) {
			$("#channelIcon span").each(function() {
				if(num != active) {
					$("#channel"+num+" img").attr("src" , settings.ico_channel_normal);
				}
				num++;
			});
		}
		if(settings.ico_channel_active != null) {
			$("#channel"+active+" img").attr("src" , settings.ico_channel_active);
		}
	}
	/* ここまで */
	
	
})(jQuery);

// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
	if(element.style.removeAttribute){
		element.style.removeAttribute('filter');
	}
}