/**

 * Interface Elements for jQuery

 * Slider

 * 

 * http://interface.eyecon.ro

 * 

 * Copyright (c) 2006 Stefan Petre

 * Dual licensed under the MIT (MIT-LICENSE.txt) 

 * and GPL (GPL-LICENSE.txt) licenses.

 *   

 *

 */

jQuery.iSlider = {

	tabindex : 1,

	set : function (values)

	{

		var values = values;

		return this.each(

			function()

			{

				this.slideCfg.sliders.each(

					function (key) 

					{ 

						jQuery.iSlider.dragmoveBy(this,values[key]);

					}

				);

			}

		);

	},

	get : function()

	{

		var values = [];

		this.each(

			function(slider)

			{

				if (this.isSlider) {

					values[slider] = [];

					var elm = this;

					var sizes = jQuery.iUtil.getSize(this);

					this.slideCfg.sliders.each(

						function (key) 

						{

							var x = this.offsetLeft;

							var y = this.offsetTop;

							xproc = parseInt(x * 100 / (sizes.w - this.offsetWidth));

							yproc = parseInt(y * 100 / (sizes.h - this.offsetHeight));

							values[slider][key] = [xproc||0, yproc||0, x||0, y||0];

						}

					);

				}

			}

		);

		return values;

	},

	modifyContainer : function (elm)

	{

		elm.dragCfg.containerMaxx = elm.dragCfg.cont.w - elm.dragCfg.oC.wb;

		elm.dragCfg.containerMaxy = elm.dragCfg.cont.h - elm.dragCfg.oC.hb;

		if (elm.SliderContainer.slideCfg.restricted ) {

			next = elm.SliderContainer.slideCfg.sliders.get(elm.SliderIteration+1);

			if (next) {

				elm.dragCfg.cont.w = (parseInt(jQuery(next).css('left'))||0) + elm.dragCfg.oC.wb;

				elm.dragCfg.cont.h = (parseInt(jQuery(next).css('top'))||0) + elm.dragCfg.oC.hb;

			}

			prev = elm.SliderContainer.slideCfg.sliders.get(elm.SliderIteration-1);

			if (prev) {

				var prevLeft = parseInt(jQuery(prev).css('left'))||0;

				var prevTop = parseInt(jQuery(prev).css('left'))||0;

				elm.dragCfg.cont.x += prevLeft;

				elm.dragCfg.cont.y += prevTop;

				elm.dragCfg.cont.w -= prevLeft;

				elm.dragCfg.cont.h -= prevTop;

			}

		}

		elm.dragCfg.maxx = elm.dragCfg.cont.w - elm.dragCfg.oC.wb;

		elm.dragCfg.maxy = elm.dragCfg.cont.h - elm.dragCfg.oC.hb;

		if(elm.dragCfg.fractions) {

			elm.dragCfg.gx = ((elm.dragCfg.cont.w - elm.dragCfg.oC.wb)/elm.dragCfg.fractions) || 1;

			elm.dragCfg.gy = ((elm.dragCfg.cont.h - elm.dragCfg.oC.hb)/elm.dragCfg.fractions) || 1;

			elm.dragCfg.fracW = elm.dragCfg.maxx / elm.dragCfg.fractions;

			elm.dragCfg.fracH = elm.dragCfg.maxy / elm.dragCfg.fractions;

		}

		elm.dragCfg.cont.dx = elm.dragCfg.cont.x - elm.dragCfg.oR.x;

		elm.dragCfg.cont.dy = elm.dragCfg.cont.y - elm.dragCfg.oR.y;

		jQuery.iDrag.helper.css('cursor', 'default');

	},

	onSlide : function(elm, x, y)

	{

		if (elm.dragCfg.fractions) {

				xfrac = parseInt(x/elm.dragCfg.fracW);

				xproc = xfrac * 100 / elm.dragCfg.fractions;

				yfrac = parseInt(y/elm.dragCfg.fracH);

				yproc = yfrac * 100 / elm.dragCfg.fractions;

		} else {

			xproc = parseInt(x * 100 / elm.dragCfg.containerMaxx);

			yproc = parseInt(y * 100 / elm.dragCfg.containerMaxy);

		}

		elm.dragCfg.lastSi = [xproc||0, yproc||0, x||0, y||0];

		if (elm.dragCfg.onSlide)

			elm.dragCfg.onSlide.apply(elm, elm.dragCfg.lastSi);

	},

	dragmoveByKey : function (event)

	{

		pressedKey = event.charCode || event.keyCode || -1;

		switch (pressedKey)

		{

			//end

			case 35:

				jQuery.iSlider.dragmoveBy(this.dragElem, [2000, 2000] );

			break;

			//home

			case 36:

				jQuery.iSlider.dragmoveBy(this.dragElem, [-2000, -2000] );

			break;

			//left

			case 37:

				jQuery.iSlider.dragmoveBy(this.dragElem, [-this.dragElem.dragCfg.gx||-1, 0] );

			break;

			//up

			case 38:

				jQuery.iSlider.dragmoveBy(this.dragElem, [0, -this.dragElem.dragCfg.gy||-1] );

			break;

			//right

			case 39:

				jQuery.iSlider.dragmoveBy(this.dragElem, [this.dragElem.dragCfg.gx||1, 0] );

			break;

			//down;

			case 40:

				jQuery.iDrag.dragmoveBy(this.dragElem, [0, this.dragElem.dragCfg.gy||1] );

			break;

		}

	},

	dragmoveBy : function (elm, position) 

	{

		if (!elm.dragCfg) {

			return;

		}

		elm.dragCfg.oC = jQuery.extend(

			jQuery.iUtil.getPosition(elm),

			jQuery.iUtil.getSize(elm)

		);

		elm.dragCfg.oR = {

			x : parseInt(jQuery.css(elm, 'left'))||0,

			y : parseInt(jQuery.css(elm, 'top'))||0

		};

		elm.dragCfg.oP = jQuery.css(elm, 'position');

		if (elm.dragCfg.oP != 'relative' && elm.dragCfg.oP != 'absolute') {

			elm.style.position = 'relative';

		}

		jQuery.iDrag.getContainment(elm);

		jQuery.iSlider.modifyContainer(elm);		

		dx = parseInt(position[0]) || 0;

		dy = parseInt(position[1]) || 0;

		nx = elm.dragCfg.oR.x + dx;

		ny = elm.dragCfg.oR.y + dy;

		if(elm.dragCfg.fractions) {

			newCoords = jQuery.iDrag.snapToGrid.apply(elm, [nx, ny, dx, dy]);

			if (newCoords.constructor == Object) {

				dx = newCoords.dx;

				dy = newCoords.dy;

			}

			nx = elm.dragCfg.oR.x + dx;

			ny = elm.dragCfg.oR.y + dy;

		}

		newCoords = jQuery.iDrag.fitToContainer.apply(elm, [nx, ny, dx, dy]);

		if (newCoords && newCoords.constructor == Object) {

			dx = newCoords.dx;

			dy = newCoords.dy;

		}

		nx = elm.dragCfg.oR.x + dx;

		ny = elm.dragCfg.oR.y + dy;

		if (elm.dragCfg.si && (elm.dragCfg.onSlide || elm.dragCfg.onChange)) {

			jQuery.iSlider.onSlide(elm, nx, ny);

		}

		nx = !elm.dragCfg.axis || elm.dragCfg.axis == 'horizontally' ? nx : elm.dragCfg.oR.x||0;

		ny = !elm.dragCfg.axis || elm.dragCfg.axis == 'vertically' ? ny : elm.dragCfg.oR.y||0;

		elm.style.left = nx + 'px';

		elm.style.top = ny + 'px';

	},

	build : function(o) {

		return this.each(

			function()

			{

				if (this.isSlider == true || !o.accept || !jQuery.iUtil || !jQuery.iDrag || !jQuery.iDrop){

					return;

				}

				toDrag = jQuery(o.accept, this);

				if (toDrag.size() == 0) {

					return;

				}

				var params = {

					containment: 'parent',

					si : true,

					onSlide : o.onSlide && o.onSlide.constructor == Function ? o.onSlide : null,

					onChange : o.onChange && o.onChange.constructor == Function ? o.onChange : null,

					handle: this,

					opacity: o.opacity||false

				};

				if (o.fractions && parseInt(o.fractions)) {

					params.fractions = parseInt(o.fractions)||1;

					params.fractions = params.fractions > 0 ? params.fractions : 1;

				}

				if (toDrag.size() == 1)

					toDrag.Draggable(params);

				else {

					jQuery(toDrag.get(0)).Draggable(params);

					params.handle = null;

					toDrag.Draggable(params);

				}

				toDrag.keydown(jQuery.iSlider.dragmoveByKey);

				toDrag.attr('tabindex',jQuery.iSlider.tabindex++);	

				this.isSlider = true;

				this.slideCfg = {};

				this.slideCfg.onslide = params.onslide;

				this.slideCfg.fractions = params.fractions;

				this.slideCfg.sliders = toDrag;

				this.slideCfg.restricted = o.restricted ? true : false;

				sliderEl = this;

				sliderEl.slideCfg.sliders.each(

					function(nr)

					{

						this.SliderIteration = nr;

						this.SliderContainer = sliderEl;

					}

				);

				if (o.values && o.values.constructor == Array) {

					for (i = o.values.length -1; i>=0;i--) {

						if (o.values[i].constructor == Array && o.values[i].length == 2) {

							el = this.slideCfg.sliders.get(i);

							if (el.tagName) {

								jQuery.iSlider.dragmoveBy(el, o.values[i]);

							}

						}

					}

				}

			}

		);

	}

};

jQuery.fn.extend(

	{

		/**

		 * Create a slider width options

		 * 

		 * @name Slider

		 * @description Create a slider width options

		 * @param Hash hash A hash of parameters. All parameters are optional.

		 * @option Mixed accepts string to select slider indicators or DOMElement slider indicator

		 * @option Integer factions (optional) number of sgments to divide and snap slider

		 * @option Function onSlide (optional) A function to be executed whenever slider indicator it is moved

		 * @option Function onChanged (optional) A function to be executed whenever slider indicator was moved

		 * @option Array values (optional) Initial values for slider indicators

		 * @option Boolean restricted (optional) if true the slider indicator can not be moved beyond adjacent indicators

		 * @type jQuery

		 * @cat Plugins/Interface

		 * @author Stefan Petre

		 */

		Slider : jQuery.iSlider.build,

		/**

		 * Set value/position for slider indicators

		 * 

		 * @name SliderSetValues

		 * @description Set value/position for slider indicators

		 * @param Array values array width values for each indicator

		 * @type jQuery

		 * @cat Plugins/Interface

		 * @author Stefan Petre

		 */

		SliderSetValues : jQuery.iSlider.set,

		/**

		 * Get value/position for slider indicators

		 * 

		 * @name SliderSetValues

		 * @description Get value/position for slider indicators

		 * @type jQuery

		 * @cat Plugins/Interface

		 * @author Stefan Petre

		 */

		SliderGetValues : jQuery.iSlider.get

	}