How Global is global?

[bjb007]

Trying to set up a variable which will be available
to a number of button handlers but no matter where
I put "global theString" it isn't available when I want
it to be.

All suggestions considered.

[Klaus]

You have to declare/initialize that variable the first time you use/fill it.

e.g.

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on openstack
  global gVar1
  put 33 into gVar1
  ...
end openstack

And then you have to declare it everytime you use it like in a button:

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on mouseup
  global gVar1
  add 66 to gVar1
  ## or whatever...
  answer gVar1
end mouseup

Best

Klaus

[BvG]

Globals are globals inasmuch as they can be used in every part of a rev application. But to use them, you have to declare them in the respective context. If a variable is declared within a handler, like Klaus explained, it's only available as such in that specific handler. But you can also declare variables outside of handlers, making them available to every handler of the same object. So this would be a valid and working script:

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global someVarName

on mouseUp
  put someVarName
end mouseUp

on mousedown
  add one to someVarName
end mousedown