Can we now pass parameters in a button call?

[Chris747]

Is it now possible to pass a parameter (or two) in a button call ? I would like to be able to pass the currency symbol in the following call...


drawTextAbsolute(117, 345, "Exit " + " @URL=EFS:callExitTrade", Color.white, Color.blue, butFlags, "Verdanna", 11, 341);

I'm tracking more than one currency on one chart and don't want to have to have multiple copies of the exit function....or is there an alternative method that some brilliant programmer might have come up with?

Thanks...

[eSignal_JasonK]

Hello Chris,

Passing parameters to a function through the text string of a button click is not possible currently. The best thing I can suggest is to draw a button for each of the currency symbols you are trading. Set each button to run it's own function that sets the value of a global variable to it's corresponding symbol. Then use that global variable in your exit function. Then to exit a trade you would need to click two buttons to send the proper trade.

[gspiker]

Jason,

Couldn't you also set the function name to call as a string and use eval() in the drawTextXXX() line to have the strong evaluated to the correct function? Seems like that should work, and would limit the number of buttons also.


if (xx == yy)
sMyString = "@URL=EFS:My_ES_Function()";
else
sMyString = "@URL=EFS:My_NQ_Function()";

drawTextAbsolute(117, 345, "Exit " + eval(sMyString), Color.white, Color.blue, butFlags, "Verdanna", 11, 341);



Or something line that?

G

[eSignal_JasonK]

Hi Garth,

Yes, you could do that, but you would need a separate exit function for each symbol. We still need a method for setting the symbol in the myString variable, which is why I suggested the separate buttons for the symbols. It would be less code. Six of one and half dozen of the other right?

[gspiker]

Hi Jason,

Unless you combine the two idea and your exit routines are just stubs that call the main exit routine with the correct symbol...that way you save code and buttons.

I agree, the best solution is allowing paramter passing from buttons, but this sounds like a reasonable, and not too hard, work around.

G

[Guest]

Hi Chris,

Take a look at at the Trend Line Alert efs towards the start of this link. If you extract the button handler functions from this, I believe you could readily modify them to perform what you would like. If you take a look at the top of the efs

var Text1 = new Array("Draw Line","Clear Line");
var Text2 = new Array("Price Magnet ON","Price Magnet OFF"); 

You can add as many different actions for each of the buttons that you would like by adding additional strings to the array(s). Then code the respective actions for each of the strings in the button handlers. Then you can toggle through the different functions associated with each button with a right mouse click and execute with a left click.

[Guest]

Hi Chris,

If this works out for you, please post what you come up with, I believe it would be very helpful for others on the forum, plus I am interested as well .

If you have problems, post what you have and either myself or others on the forum will help you make it work.