/*
 * 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-0.2.js - Small tooltip library on top of Prototype 
 * by Jonathan Weiss <jw@innerewut.de> distributed under the BSD license. 
 */

var Tooltip = Class.create();
Tooltip.prototype = {
  initialize: function(element, tool_tip) {
    var options = Object.extend({
		default_css: false,
		margin: "0px",
		padding: "2px",
		backgroundColor: "#ffffff",
		min_distance_x: 5,
		min_distance_y: 5,
		delta_x: -40,
		delta_y: 20,
		zindex: 99
    }, arguments[2] || {});

    this.element      = $(element);

    this.options      = options;
    
    // use the supplied tooltip element or create our own div
    if($(tool_tip)) {
      this.tool_tip = $(tool_tip);
    } else {
      this.tool_tip = $(document.createElement("div")); 
      document.body.appendChild(this.tool_tip);
      this.tool_tip.addClassName("tooltip_container");
      this.tool_tip.innerHTML = tool_tip;
     // this.tool_tip.appendChild(document.createTextNode(tool_tip));
    }

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

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


    this.registerEvents();
  },

  destroy: function() {
    Event.stopObserving(this.element, "mouseover", this.eventMouseOver);
    Event.stopObserving(this.element, "click", this.eventMouseOut);
  //  Event.stopObserving(this.element, "mousemove", this.eventMouseMove);
  },

  registerEvents: function() {
    Event.observe(this.element, "mouseover", this.eventMouseOver);
    Event.observe(this.element, "click", this.eventMouseOut);
   // Event.observe(this.element, "mousemove", this.eventMouseMove);
    
  },

  moveTooltip: function(event){
	  Event.stop(event);
	  // get Mouse position
    var mouse_x = Event.pointerX(event);
	  var mouse_y = Event.pointerY(event);
	
	  // decide if wee 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.min_distance_x) ){ // too big for X
		  mouse_x = mouse_x - element_width;
		  // apply min_distance to make sure that the mouse is not on the tool-tip
		  mouse_x = mouse_x - this.options.min_distance_x;
	  } else {
		  mouse_x = mouse_x + this.options.min_distance_x;
	  }
	
	  if ( (element_height + mouse_y) >= ( this.getWindowHeight() - this.options.min_distance_y) ){ // too big for Y
		  mouse_y = mouse_y - element_height;
	    // apply min_distance to make sure that the mouse is not on the tool-tip
		  mouse_y = mouse_y - this.options.min_distance_y;
	  } else {
		  mouse_y = mouse_y + this.options.min_distance_y;
	  } 
	
	  // now set the right styles
	  this.setStyles(mouse_x, mouse_y);
  },
	
		
  showTooltip: function(event) {
	  
	  SluitAlles();
	  
    Event.stop(event);
    this.moveTooltip(event);
	  new Element.show(this.tool_tip);
  },
  
  setStyles: function(x, y){
    // set the right styles to position the tool tip
	  Element.setStyle(this.tool_tip, { position:'absolute',
	 								    top:y + this.options.delta_y + "px",
	 								    left:x + this.options.delta_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){
	  
	  //	setTimeout(function(this){ 
	  		
	  //		alert('test');
	  	  new Element.hide(this.tool_tip);
	  //	  	alert('test2');
	  //	},1000,this);
	
  },

  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;	
  }

}


function SluitAlles() {
	 $$('.tooltip_container').each(function(s) {
		  Element.hide(s);
		  });
	
}