-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=63266

--+------------------------------------------------------------------+
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--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |                    
--|                                          mario.jemic@gmail.com   |
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-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams
function Init()
    indicator:name("Latency");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
	
	indicator.parameters:addGroup("Placement");
	indicator.parameters:addString("Y", " Y Placement","" , "Top");
    indicator.parameters:addStringAlternative("Y", "Top", "Top" , "Top");
    indicator.parameters:addStringAlternative("Y", "Bottom", "Bottom" , "Bottom"); 
	
	indicator.parameters:addString("X", " X Placement","" , "Left");
    indicator.parameters:addStringAlternative("X", "Right", "Right" , "Right");
    indicator.parameters:addStringAlternative("X", "Left", "Left" , "Left"); 
    indicator.parameters:addInteger("ShiftY", "Shift","" , 0);
 
	 
    indicator.parameters:addColor("Color", "Label Color", "", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("Size", "Label Size", "", 10);
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- TODO: Refine the first period calculation for each of the output streams.
-- TODO: Calculate all constants, create instances all subsequent indicators and load all required libraries
-- Parameters block
    local Color, Size;
	local Y, X, ShiftY;
-- Routine
function Prepare(nameOnly)
    Color= instance.parameters.Color;
	Size= instance.parameters.Size;
	Y= instance.parameters.Y;
	X= instance.parameters.X;
	ShiftY= instance.parameters.ShiftY;
	 
  
    source = instance.source;
    local name = profile:id() .. "(" .. source:name()  .. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end
	
	instance:ownerDrawn(true);
 
end
 
-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period)
     
end

 
local init = false;
 
function Draw(stage, context)
 
	
	  if stage ~= 2 then
	  return;
	  end
	  
        if not init then
           context:createFont (1, "Arial", context:pointsToPixels (Size), context:pointsToPixels (Size), 0);
            init = true;
        end
	
 
	 local Time1=core.host:execute("getServerTime"); 
     local Time2= core.now ();	
	 
	 Time1= core.host:execute ("convertTime", core.TZ_EST, core.TZ_LOCAL, Time1)
     local Delta=(Time1-Time2)/(1/86400000)
	
 
	local Text1= "Latency : " .. win32.formatNumber(Delta, false, 2 ) .. " milliseconds";
	 
   local i=1;	 
   width, height = context:measureText (1, Text1, 0);
   context:drawText (1,  Text1, Color, -1,  iX(context,width,0,1) ,  iY(context,height,i,0) ,iX(context,width,0,2),iY(context,height,i,1), 0 );	
   

end		
 
 function iX(context, width,Shift,x)

	if X== "Left" then
	return  context:left()+ Shift*width +  width*(x-1) ;
	else
	return context:right() - width*Shift -  width*(1-(x-1));
	end
end



function iY(context, height,Index , Line)

	if Y== "Top" then
		return context:top()+Index*height +ShiftY*height + Line *height;
	else
		if Line== 1 then
		return context:bottom()-(Index+1)*height -ShiftY*height + height;
		else
		return context:bottom()-(Index+1)*height -ShiftY*height;
		end
	end
end