slider.js

Enterprise Template for BizIdea 2.0, with full pictures and aspx files.

function slider (a_init, a_tpl) {
	this.f_setValue  = f_sliderSetValue;
        this.f_outValue  = f_sliderOutValue;
	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];

        s1 = this.s_spanname;
        s2 = this.s_sourcename;

	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
	document.write(
		'<div style="width:' + this.n_controlWidth + 'px;height:' + this.n_controlHeight + 'px;border:0; background-image:url(' + this.s_imgControl + ')" id="sl' + this.n_id + 'base">' +
		'<img src="' + this.s_imgSlider + '" width="' + this.n_sliderWidth + '" height="' + this.n_sliderHeight + '" border="0" style="position:relative;left:' + this.n_pathLeft + 'px;top:' + this.n_pathTop + 'px;z-index:' + this.n_zIndex + ';cursor:hand;visibility:hidden;" name="sl' + this.n_id + 'slider" id="sl' + this.n_id + 'slider" onmousedown="return f_sliderMouseDown(' + this.n_id + ')"/></div>'
	);
	this.e_base   = $('sl' + this.n_id + 'base');
	this.e_slider = $('sl' + this.n_id + 'slider');
	
	// 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
	this.f_setValue(this.n_value ? null : 1);
	this.e_slider.style.visibility = 'visible';
}

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';

	// save new value
	var e_input;
	if (this.s_name != null) {
		e_input = $(this.s_name);
                if(e_input != null)
                	e_input.innerHTML = n_value;
	}
}

function f_sliderOutValue (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;
        if(this.s_type =='ajax')
        {
	    changepage(n_value, this.s_sourcename, this.s_spanname);
        }
        else if(this.s_type =='url')
        {
            var tarurl = this.s_spanname.replace(/{\$pageid\/}/g, n_value);
            redirecturl(tarurl);
        }
}

// 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 = 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;
		o_slider.f_outValue(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 (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;
}