Xojo does not seem to know how to calculate in DrawControlInLayoutEditor

[Björn_Eiríksson]

Xojo does not seem to know how to calculate in DrawControlInLayoutEditor

I am guessing its Xojo script at work in this event ?

But it basically does not know how to calculate 1 - 1 since it thinks 1 - 1 is 1 but of course it should be zero.

var reminder as Double = 1.0

if lowLimit > 0.0 then  // lowLimit is also type double
  g.DrawObject(a)
  
  g.DrawingColor = &cFF0000
  g.DrawText(Str(reminder), 20, 20) // Prints 1
  
  g.DrawText(Str(lowLimit), 20, 32) // Prints 1
  
  reminder = 1.0 - lowLimit
  
  g.DrawText(Str(reminder), 20, 44) // Prints 1 ?? should be 0 !!!!
  
end if

[Björn_Eiríksson]

It actually seems to know how to calculate it just does not know how to assign again to the reminder variable for some reason…

Since if I put it in tmp variable instead then it calculates

var reminder as Double = 1.0

if lowLimit > 0.0 then
  g.DrawObject(a)
  
  g.DrawingColor = &cFF0000
  g.DrawText(Str(reminder), 20, 20) // Prints 1
  
  g.DrawText(Str(lowLimit), 20, 32) // Prints 1
  
  var tmp as Double = 1.0 - lowLimit
  
  g.DrawText(Str(tmp), 20, 44) // Prints 0
  
end if

All a bit disturbing…

And if we test one more… then we can see how the assignment fails again to reminder:

var reminder as Double = 1.0

if lowLimit > 0.0 then
  g.DrawObject(a)
  
  g.DrawingColor = &cFF0000
  g.DrawText(Str(reminder), 20, 20) // Prints 1
  
  g.DrawText(Str(lowLimit), 20, 32) // Prints 1
  
  var tmp as Double = 1.0 - lowLimit
  reminder = tmp

  g.DrawText(Str(reminder), 20, 44) // Prints 1 but should be 0 since tmp is 0
  
end if

[Ricardo_Cruz]

I’ve did a quick test and It seems “reminder” variable name is colliding somewhere, internally. Does it works if you rename it?

[Björn_Eiríksson]

No that was the first thing I tried to rename it. (Renamed it to reminderX)

I also tried changing it from double to single.

But same thing.

I think its because it is under the if, I can assign value to it outside of the if statement but not inside. (as crazy as that sounds)

[Ricardo_Cruz]

That’s odd, I’ve tried to rename “reminder” to “asdf” and it seems to be working fine:

[Björn_Eiríksson]

So you actually were able to reproduce it ? with the name reminder ?

Maybe reminderX is not good enough renaming…

[Ricardo_Cruz]

Anything starting with REM causes the issue.

[Björn_Eiríksson]

Super strange for sure !

Thanks for narrowing it ! I will rename it properly.

[Ricardo_Cruz]

I guess it takes lines starting with that variable name as REM comments.

Issue #72004

Thank you!