/*
 * Copyright (c) 2006 Jonathan Weiss <jw@innerewut.de>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */


/* tooltip-0.1.js - Small tooltip library on top of Prototype
 * by Jonathan Weiss <jw@innerewut.de> distributed under the BSD license.
 *
 * Unlike other libraries it does not declare its own tooltip
 * div or window. It relies on an already existing div or element defined by you to display as
 * the tooltip. This element will be placed (and shown) near the mouse pointer when a trigger-element is moused-over.
 *
 *
 * Usage:
 *   <script src="/javascripts/prototype.js" type="text/javascript"></script>
 *   <script src="/javascripts/tooltip.js" type="text/javascript"></script>
 *   <script type="text/javascript">
 *     var my_tooltip = new Tooltip('id_of_trigger_element', 'id_of_tooltip_to_show_element')
 *   </script>
 *
 * Now whenever you trigger a mouseOver on the `trigger` element, the tooltip element will
 * be shown. On o mouseOut the tooltip disappears.
 *
 * Example:
 *
 *   <script src="/javascripts/prototype.js" type="text/javascript"></script>
 *   <script src="/javascripts/scriptaculous.js" type="text/javascript"></script>
 *   <script src="/javascripts/tooltip.js" type="text/javascript"></script>
 *
 *   <div id='tooltip' style="display:none; margin: 5px; background-color: red;">
 *     Detail infos on product 1....<br />
 *   </div>
 *
 *   <div id='product_1'>
 *     This is product 1
 *   </div>
 *
 *   <script type="text/javascript">
 *     var my_tooltip = new Tooltip('product_1', 'tooltip')
 *   </script>
 *
 * You can use my_tooltip.destroy() to remove the event observers and thereby the tooltip.
 */


/**
 * @addon: Positioning
 * Some parts of this have been modified to make the positioning work for the
 * intended use on the ING DIRECT website.
 * @author: John Van Der Loo
 * @copyright: @www Digital 2008
 */

var Tooltip = Class.create();
Tooltip.prototype = {
  initialize: function(element, tool_tip) {
    var options = Object.extend({
      default_css: false,
      margin: "0px",
		  padding: "5px",
		  backgroundColor: "#d6d6fc",
		  delta_x: 20,
		  delta_y: 20,
      zindex: 1000
    }, arguments[1] || {});
    this.element        = $(element);
    this.tool_tip       = $(tool_tip);
    /** @addon: the tool tip has a relative parent around it? (bool) */
    this.relativeParent = false;
    this.options        = options;

    // hide the tool-tip by default
    this.tool_tip.hide();

    this.eventMouseOver = this.showTooltip.bindAsEventListener(this);
    this.eventMouseOut   = this.hideTooltip.bindAsEventListener(this);


    this.registerEvents();
  },

  destroy: function() {
    Event.stopObserving(this.element, "mouseover", this.eventMouseOver);
    Event.stopObserving(this.element, "mouseout", this.eventMouseOut);
  },

  registerEvents: function() {
    Event.observe(this.element, "mouseover", this.eventMouseOver);
    Event.observe(this.element, "mouseout", this.eventMouseOut);
  },

  showTooltip: function(event){
	Event.stop(event);
	// get Mouse position
  var mouse_x = Event.pointerX(event);
	var mouse_y = Event.pointerY(event);


	// decide if we need to switch sides for the tooltip
	var dimensions = Element.getDimensions( this.tool_tip );
	var element_width = dimensions.width;
	var element_height = dimensions.height;

	if ( (element_width + mouse_x) >= ( this.getWindowWidth() - this.options.delta_x) ){ // too big for X
    //alert(mouse_x);
		mouse_x = mouse_x - element_width;
    //alert(mouse_x);
		// apply delta to make sure that the mouse is not on the tool-tip
		mouse_x = mouse_x - this.options.delta_x;
    //alert(mouse_x);
	} else {
		mouse_x = mouse_x + this.options.delta_x;
	}

	if ( (element_height + mouse_y) >= ( this.getWindowHeight() - this.options.delta_y) ){ // too big for Y
		mouse_y = mouse_y - element_height;
	    // apply delta to make sure that the mouse is not on the tool-tip
		mouse_y = mouse_y - this.options.delta_y;
	} else {
		mouse_y = mouse_y + this.options.delta_y;
	}

	// now set the right styles
	this.setStyles(mouse_x, mouse_y);


	// finally show the Tooltip
	//new Effect.Appear(this.tool_tip);
	new Element.show(this.tool_tip);

  },

  setStyles: function(x, y){
    // set the right styles to position the tool tip
  if (this.relativeParent==true) {
    /** if the direct parent is a relatively positioned element
     *  we can just offset the width/height to that. I'm positioning
     *  the element to the left of the parent.
     */
    y = 0 - ($(this.tool_tip).getHeight()/2)+10;
    x = 0 - $(this.tool_tip).getWidth();
  }
  //alert(x);
	Element.setStyle(this.tool_tip, { position:'absolute',
	 								  top:y + "px",
	 								  left:x + "px",
									  zindex:this.options.zindex
	 								});

	// apply default theme if wanted
	if (this.options.default_css){
	  	Element.setStyle(this.tool_tip, { margin:this.options.margin,
		 								  padding:this.options.padding,
		                                  backgroundColor:this.options.backgroundColor,
										  zindex:this.options.zindex
		 								});
	}
  },

  hideTooltip: function(event){
	//new Effect.Fade(this.tool_tip);
	new Element.hide(this.tool_tip);
  },

  getWindowHeight: function(){
    var innerHeight;
		if (navigator.appVersion.indexOf('MSIE')>0) {
			innerHeight = document.body.clientHeight;
    } else {
			innerHeight = window.innerHeight;
    }
    return innerHeight;
  },

  getWindowWidth: function(){
    var innerWidth;
		if (navigator.appVersion.indexOf('MSIE')>0) {
			innerWidth = document.body.clientWidth;
    } else {
			innerWidth = window.innerWidth;
    }
    return innerWidth;
  }

}