// Title: tigra slider control
// Description: See the demo at url
// URL: http://www.softcomplex.com/products/tigra_slider_control/
// Version: 1.0 (commented source)
// Date: 02/15/2006
// Tech. Support: http://www.softcomplex.com/forum/
// Notes: This script is free. Visit official site for further details.

var mapSlider;

function slider (a_init, a_tpl, sliderDiv) {
	this.f_setValue  = f_sliderSetValue;
	this.f_getPos    = f_sliderGetPos;
	
	// register in the global collection	
	if (!window.A_SLIDERS)
		window.A_SLIDERS = [];
	this.n_id = window.A_SLIDERS.length;
	
	window.A_SLIDERS[this.n_id] = this;

	// save config parameters in the slider object
	var s_key;
	if (a_tpl)
		for (s_key in a_tpl)
			this[s_key] = a_tpl[s_key];
	for (s_key in a_init)
		this[s_key] = a_init[s_key];

	this.n_pix2value = this.n_pathLength / (this.n_maxValue - this.n_minValue);
	if (this.n_value == null)
		this.n_value = this.n_minValue;

	// generate the control's HTML
	
	sliderDiv.style.width = this.n_controlWidth + "px";
	sliderDiv.style.height = this.n_controlHeight + "px";
	sliderDiv.style.border = 0;
	sliderDiv.style.backgroundColor = "transparent"
	makeTransparentBackground(sliderDiv, this.s_imgControl);
	sliderDiv.style.backgroundImage = "url(" + this.s_imgControl + ")";
	sliderDiv.style.backgroundRepeat = "no-repeat";
	sliderDiv.style.marginLeft = "3";
	sliderDiv.style.padding = "0";
	sliderDiv.id = "sl" + this.n_id + "base";
	var image = new Image();
	image.src = this.s_imgSlider;
	image.width = this.n_sliderWidth;
	image.height = this.n_sliderHeight;
	image.border = 0;
	image.style.position = "relative";
	//image.style.margin = "-4";
	image.style.padding = "0";
	image.style.left = this.n_pathLeft + "px";
	image.style.top =this.n_pathTop + "px";
	image.style.zIndex = this.n_zIndex + "";
	image.style.cursor = "pointer";
	image.style.visibility = "hidden";
	image.name="sl" + this.n_id + "slider";
	image.id="sl" + this.n_id + "slider";
	
	var imageOver = new Image();
	imageOver.src = this.s_imgSliderOver;
	
	var imageSelect = new Image();
	imageSelect.src = this.s_imgSliderSelect;
	
	var originalSrc = this.s_imgSlider;
	
	image.onmousedown = function() {
		makeTransparentImage(image, imageSelect.src);
		return f_sliderMouseDown(this.n_id );
	};
	
	image.onmouseout = function() {
		makeTransparentImage(image, originalSrc);
	};
	
	image.onmouseover = function() {
		makeTransparentImage(image, imageOver.src);
	};
	
	image.onmouseup = image.onmouseover;
	
	image.onclick = null;

	sliderDiv.appendChild(image);
	this.e_base   = sliderDiv;
	this.e_slider = image;

//	GEvent.addDomListener(image, "mousemove", f_sliderMouseMove);
//	GEvent.addDomListener(image, "mouseup", f_sliderMouseUp);
	
	// safely hook document/window events
	if (document.onmousemove != f_sliderMouseMove) {
		window.f_savedMouseMove = document.onmousemove;
		document.onmousemove = f_sliderMouseMove;
	}
	
	if (document.onmouseup != f_sliderMouseUp) {
		window.f_savedMouseUp = document.onmouseup;
		document.onmouseup = f_sliderMouseUp;
	}
	// preset to the value in the input box if available
//	var e_input = this.s_form == null
//		? get_element(this.s_name)
//		: document.forms[this.s_form]
//			? document.forms[this.s_form].elements[this.s_name]
//			: null;
	this.f_setValue(null, 1);
	//this.e_slider.style.visibility = 'visible';
	makeTransparentImage(this.e_slider, this.s_imgSlider);
}

function f_sliderSetValue (n_value, b_noInputCheck) {
	if (n_value == null)
		n_value = this.n_value == null ? this.n_minValue : this.n_value;
	if (isNaN(n_value))
		return false;
	// round to closest multiple if step is specified
	if (this.n_step)
		n_value = Math.round((n_value - this.n_minValue) / this.n_step) * this.n_step + this.n_minValue;
	// smooth out the result
	if (n_value % 1)
		n_value = Math.round(n_value * 1e5) / 1e5;

	if (n_value < this.n_minValue)
		n_value = this.n_minValue;
	if (n_value > this.n_maxValue)
		n_value = this.n_maxValue;

	
	this.n_value = n_value;

	// move the slider
	if (this.b_vertical){
		this.e_slider.style.top  = (this.n_pathTop + this.n_pathLength - Math.round((n_value - this.n_minValue) * this.n_pix2value)) + 'px';
	}else{
		this.e_slider.style.left = (this.n_pathLeft + Math.round((n_value - this.n_minValue) * this.n_pix2value)) + 'px';
	}
	
	if(this.mapSlider != null){
		this.mapSlider.setZoom(this.n_value + 10);
	} 
}

// get absolute position of the element in the document
function f_sliderGetPos (b_vertical, b_base) {
	var n_pos = 0,
		s_coord = (b_vertical ? 'Top' : 'Left');
	var o_elem = o_elem2 = b_base ? this.e_base : this.e_slider;
	
	while (o_elem) {
		n_pos += o_elem["offset" + s_coord];
		o_elem = o_elem.offsetParent;
	}
	o_elem = o_elem2;

	var n_offset;
	while (o_elem.tagName != "BODY") {
		n_offset = o_elem["scroll" + s_coord];
		if (n_offset)
			n_pos -= o_elem["scroll" + s_coord];
		o_elem = o_elem.parentNode;
	}
	return n_pos;
}

function f_sliderMouseDown (n_id) {
	window.n_activeSliderId = 0;//deber�a ser window.n_activeSliderId = n_id;
	return false;
}

function f_sliderMouseUp (e_event, b_watching) {
	if (window.n_activeSliderId != null) {
		var o_slider = window.A_SLIDERS[window.n_activeSliderId];
		o_slider.f_setValue(o_slider.n_minValue + (o_slider.b_vertical
			? (o_slider.n_pathLength - parseInt(o_slider.e_slider.style.top) + o_slider.n_pathTop)
			: (parseInt(o_slider.e_slider.style.left) - o_slider.n_pathLeft)) / o_slider.n_pix2value);
		if (b_watching)	return;
		window.n_activeSliderId = null;
	}
	if (window.f_savedMouseUp)
		return window.f_savedMouseUp(e_event);
}

function f_sliderMouseMove (e_event) {
	if (!e_event && window.event) e_event = window.event;

	// save mouse coordinates
	if (e_event) {
		window.n_mouseX = e_event.clientX + f_scrollLeft();
		window.n_mouseY = e_event.clientY + f_scrollTop();
	}

	// check if in drag mode
	
	if (window.n_activeSliderId != null) {
		
		var o_slider = window.A_SLIDERS[window.n_activeSliderId];

		var n_pxOffset;
		if (o_slider.b_vertical) {
			var n_sliderTop = window.n_mouseY - o_slider.n_sliderHeight / 2 - o_slider.f_getPos(1, 1) - 3;
			// limit the slider movement
			if (n_sliderTop < o_slider.n_pathTop)
				n_sliderTop = o_slider.n_pathTop;
			var n_pxMax = o_slider.n_pathTop + o_slider.n_pathLength;
			if (n_sliderTop > n_pxMax)
				n_sliderTop = n_pxMax;
			o_slider.e_slider.style.top = n_sliderTop + 'px';
			n_pxOffset = o_slider.n_pathLength - n_sliderTop + o_slider.n_pathTop;
		}
		else {
			var n_sliderLeft = window.n_mouseX - o_slider.n_sliderWidth / 2 - o_slider.f_getPos(0, 1) - 3;
			// limit the slider movement
			if (n_sliderLeft < o_slider.n_pathLeft)
				n_sliderLeft = o_slider.n_pathLeft;
			var n_pxMax = o_slider.n_pathLeft + o_slider.n_pathLength;
			if (n_sliderLeft > n_pxMax)
				n_sliderLeft = n_pxMax;
			o_slider.e_slider.style.left = n_sliderLeft + 'px';
			n_pxOffset = n_sliderLeft - o_slider.n_pathLeft;
		}
//		if (o_slider.b_watch){
//			 f_sliderMouseUp(e_event, 1);
//		}
		
		return false;
	}
	
	if (window.f_savedMouseMove)
		return window.f_savedMouseMove(e_event);
}

// get the scroller positions of the page
function f_scrollLeft() {
	return f_filterResults (
		window.pageXOffset ? window.pageXOffset : 0,
		document.documentElement ? document.documentElement.scrollLeft : 0,
		document.body ? document.body.scrollLeft : 0
	);
}
function f_scrollTop() {
	return f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.scrollTop : 0,
		document.body ? document.body.scrollTop : 0
	);
}
function f_filterResults(n_win, n_docel, n_body) {
	var n_result = n_win ? n_win : 0;
	if (n_docel && (!n_result || (n_result > n_docel)))
		n_result = n_docel;
	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}

function f_sliderError (n_id, s_message) {
	alert("Slider #" + n_id + " Error:\n" + s_message);
	window.n_activeSliderId = null;
}

get_element = document.all ?
	function (s_id) { return document.all[s_id] } :
	function (s_id) { return document.getElementById(s_id) };



fileLoaded("slider.js");