topic Re: deactivate draw-end handler in ArcGIS JavaScript Maps SDK Questions

deactivate draw-end handler

maximcouton — Mon, 28 Jul 2014 12:58:15 GMT

Hi,

He is my problem,

var tb = new Draw(map);

tb.on("draw-end", lang.hitch(map, getAreaAndLength));

How can I later deactivate this handler ?

I wante something like : tb.on("draw-end").set(null) ??

This is because I have to switch between two handlers,

IF set directely the second handler it still call the first

so finally , it calls the two handlers.

Thanks,

Maxim

Re: deactivate draw-end handler

RobertScheitlin__GISP — Mon, 28 Jul 2014 14:25:16 GMT

Maxim,

If you setup a variable for the event then you can just use the remove function.

var signal = tb.on("draw-end", lang.hitch(map, getAreaAndLength));

signal.remove();

Re: deactivate draw-end handler

JeffPace — Mon, 28 Jul 2014 15:11:09 GMT

I think you should use once

Incidentally, dojo/on includes a convenience method for doing exactly this: on.once. It accepts the same parameters as on, but will automatically remove the handler once it is fired.

Events with Dojo - The Dojo Toolkit‌

Re: deactivate draw-end handler

maximcouton — Mon, 28 Jul 2014 15:15:15 GMT

Its:

tb.onDrawEnd.after.remove();

Maxim,

Re: deactivate draw-end handler

RobertScheitlin__GISP — Mon, 28 Jul 2014 15:20:28 GMT

Maxim,

As with many things there are a couple of ways to do it. Don't forget to mark people responses as helpful (if you think they are) using the actions menu link. Also if you think that your answer is the best than mark yours as the correct answer.

Re: deactivate draw-end handler

maximcouton — Mon, 28 Jul 2014 15:33:07 GMT

Ok,

I tried to use directely tb.remove() but I am getting the exception that remove is not defined. So after seaching a while in the debugger options I found the remove funtion you suggested in onDrawEnd.after.remove();

Thanks Robert,