Complex_Graphics.prototype= new Extra_Graphics();
function Complex_Graphics()
{
	this._list_of_graphics=new Array();
}
Complex_Graphics.prototype.add_graphics=function(graphics)
{
	this._list_of_graphics.push(graphics);
};
Complex_Graphics.prototype.add_list_of_graphics=function(list)
{
	this._list_of_graphics=this._list_of_graphics.concat(list);
};
Complex_Graphics.prototype.draw=function()
{
  var lookup_x1 = new Array();
    var lookup_y1 = new Array();
    var lookup_x2 = new Array();
    var lookup_y2 = new Array();
    var draw = true;
    try{
        for(var i=0;i< this._list_of_graphics.length; i++)
        {
            if( this._list_of_graphics[i].constructor == Line ){
                var pxl1 = _MAP_WRAPPER.convert_to_pixel(this._list_of_graphics[i]._p1._x,
                this._list_of_graphics[i]._p1._y,true);
                var pxl2 = _MAP_WRAPPER.convert_to_pixel(this._list_of_graphics[i]._p2._x,
                this._list_of_graphics[i]._p2._y,true);
                draw = true;
                for(var ii=0; ii<lookup_x1.length; ii++ ){
                    if( lookup_x1[ii] ==pxl1[0] && lookup_y1[ii] == pxl1[1] && lookup_x2[ii] ==pxl2[0] &&
                        lookup_y2[ii] == pxl2[1]){
                            draw = false;
                            break;
                        }
                    }
                    if(!draw){
                        continue;
                    }
                    lookup_x1.push(pxl1[0]);
                    lookup_y1.push(pxl1[1]);
                    lookup_x2.push(pxl2[0]);
                    lookup_y2.push(pxl2[1]);
            }

            this._list_of_graphics[i]._color = this._color;
            this._list_of_graphics[i]._stroke = this._stroke;
            this._list_of_graphics[i]._printable = this._printable;
            this._list_of_graphics[i].draw();
        }
		}catch(e)
		{
			alert("Complex_Graphics.draw(): "+e);
			return false;
		}
};
Complex_Graphics.prototype.clear=function()
{
	try{
		for(var i=0;i <this. _list_of_graphics.length;i++)
			this._list_of_graphics[i].clear();
			
		this._list_of_graphics.splice(0,this._list_of_graphics.length);
	}catch(e)
	{
	    alert("Complex_Graphics.clear(): "+e);
	    return false;
	}
};
Complex_Graphics.prototype.snap_point=function(x,y) 
{
	var res=false;
	for(var i=0;i < this._list_of_graphics.length;i++)
	{
		res = this._list_of_graphics[i].snap_point(x,y);
		if(res != false)
			return res;
	}
	return res;
};
Complex_Graphics.prototype.to_post_request=function()
{
	try
	{
		var x="";
		var y="";
		var first=true;
		var separator = "";
		for(var i=0; i < this._list_of_graphics.length; i++)
		{
			if(this._list_of_graphics[i].constructor == Line )
			{
				if(first)
					first=false;
				else
					separator="_";
				var tpr = this._list_of_graphics[i].to_post_request();
				x+=separator+tpr[0];
				y+=separator+tpr[1];
			}	
		}
		return new Array(x,y);
	}
	catch(e)
	{
		alert("Complex_Graphics.to_post_request() "+e);
		return false;
	}	
};
Complex_Graphics.prototype.to_polygon_post_request=function()
{
	try
	{
		//Check if the gathering place is positioned
		if(this._list_of_graphics.length == 0)
		{
			alert(_MSG_DEFINE_GEOMETRY);
			return false;
		}
	
		//close the polygon
		this._list_of_graphics[this._list_of_graphics.length-1]._p2=this._list_of_graphics[0]._p1.clone();
	
		//encode the polygon points
		var x="";
		var y="";
		var first = true;
		for( var i=0; i < this._list_of_graphics.length; i++ )
		{
			
			var obj = this._list_of_graphics[i];
			
			if(obj.constructor != Line)
			{
				throw "Sono supportate unicamente linee nella definizione del poligono";
			}
			
			if(first)
			{
				x+=obj._p1._x;
				y+=obj._p1._y;
	
				x+="_";
				y+="_";
				
				x+=obj._p2._x;
				y+=obj._p2._y;
				first = false;
			}
			else
			{
				x+=obj._p2._x;
				y+=obj._p2._y;
			
			}
			if( i+1 < this._list_of_graphics.length )
			{
				x+="_";
				y+="_";
			}
		}
		
		return new Array(x,y);
	
	}catch(e)
	{
		alert("Complex_Graphics.to_polygon_post_request() "+e);
		return false;
	}	
};