/* 
	* The Coda Object - New Wave Javascript
	*
	* Copyright (c) 2010 Ludovic Anceaux
	*
	* $Date: 01-06-2010
*/

var currentSection = "21-pane"; // The default loaded section on the page
var tabTag = "-tab";
var paneTag = "-pane";
function load_coda(control){
	currentSection = control + "-pane";
}

function ScrollSection(link, scrollArea, offset){
	if(currentSection == link){
		return;
	}
	lastSection = currentSection;
	currentSection = link;
    sectionTab = currentSection.split("-")[0] + tabTag;
    document.getElementById(sectionTab).className = "active";
    if(lastSection){
	    lastTab = lastSection.split("-")[0] + tabTag;
	    document.getElementById(lastTab).className = "inactive";
	}
	theScroll = document.getElementById(scrollArea);
	position = findElementPos(document.getElementById(link));
	if(offset != ""){
		offsetPos = findElementPos(document.getElementById(offset));
		position[0] = position[0] - offsetPos[0];
	}
	scrollStart(theScroll, theScroll.scrollLeft, position[0], "horiz");
}

function ScrollArrow(direction, toolbar, scrollArea, offset){
	toolbarElem = document.getElementById(toolbar);
	toolbarNames = new Array();
	if(toolbarElem.hasChildNodes()){
		var children = toolbarElem.childNodes;
		for(var i = 0; i < children.length; i++){
			if(toolbarElem.childNodes[i].tagName == "LI"){
				toolbarNames.push(toolbarElem.childNodes[i].id.split("-")[0]);
			}
		}
	}
	for(var i = 0; i < toolbarNames.length; i++){
		if(toolbarNames[i] == currentSection.split("-")[0]){
			if(direction == "left"){
				if(i - 1 < 0){
					gotoTab = toolbarNames[toolbarNames.length - 1];
				} else{
					gotoTab = toolbarNames[i - 1];
				}
			} else{
				if((i + 1) >(toolbarNames.length - 1)){
					gotoTab = toolbarNames[0];
				} else{
					gotoTab = toolbarNames[i + 1];
				}
			}
		}
	}
	ScrollSection(gotoTab+paneTag, scrollArea, offset);
}

var scrollanim ={time:0, begin:0, change:0.0, duration:0.0, element:null, timer:null};

function scrollStart(elem, start, end, direction){
	if(scrollanim.timer != null){
		clearInterval(scrollanim.timer);
		scrollanim.timer = null;
	}
	scrollanim.time = 0;
	scrollanim.begin = start;
	scrollanim.change = end - start;
	scrollanim.duration = 25;
	scrollanim.element = elem;
	
	if(direction == "horiz"){
		scrollanim.timer = setInterval("scrollHorizAnim();", 15);
	}else{
		scrollanim.timer = setInterval("scrollVertAnim();", 15);
	}
}

function scrollVertAnim(){
	if(scrollanim.time > scrollanim.duration){
		clearInterval(scrollanim.timer);
		scrollanim.timer = null;
	}else{
		move = sineInOut(scrollanim.time, scrollanim.begin, scrollanim.change, scrollanim.duration);
		scrollanim.element.scrollTop = move; 
		scrollanim.time++;
	}
}

function scrollHorizAnim(){
	if(scrollanim.time > scrollanim.duration){
		clearInterval(scrollanim.timer);
		scrollanim.timer = null;
	}else{
		move = sineInOut(scrollanim.time, scrollanim.begin, scrollanim.change, scrollanim.duration);
		scrollanim.element.scrollLeft = move;
		scrollanim.time++;
	}
}

function findElementPos(elemFind){
	var elemX = 0;
	var elemY = 0;
	do{
		elemX += elemFind.offsetLeft;
		elemY += elemFind.offsetTop;
	}while( elemFind = elemFind.offsetParent)
	return Array(elemX, elemY);
}

function cubicOut(t, b, c, d){
	return c*((t=t/d-1)*t*t + 1) + b;
}

function sineInOut(t, b, c, d){
	return -c/2 *(Math.cos(Math.PI*t/d) - 1) + b;
}