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Multiplying 2 temporary variables & Using custom handlers
Posted: Wed May 29, 2013 10:52 am
by ninjabunny14
Hi guys,
When I press a button on my card it uses the following code:
Code: Select all
on mouseUp
send Calculate to card "Steve"
end mouseUp
This brings up an error saying it can't find handler. Isn't calculate meant to turn into a custom handler?
Anyway,
When that part was working (it just stopped working after I closed and re-opened it) I was having issues with the Calculate command anyway
My code is as follows:
Code: Select all
on Calculate
-- Stores the price and percentage into temporary variables
set the tPrice of this card to field "Price Input"
set the tUO of this card to (4/100)
set the tAccUO of this card to (multiply (tUO of this card,tPrice of this card))
end Calculate
I haven't used the mutliply command but the dictionary reffered me to multiply as opposed to *.
It comes up with error: compilation error at line 11 {that is the line with set the tAccUO...} (Function: separator is not a ',') near "of", char 46
Where have I gone wrong please guys?
Thx
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 11:08 am
by icouto
In LiveCode, whenever the compiler comes across a word it doesn't know, it will assume it is a
variable.
The 'send' command requires a
string. Normally, you'd use it like this:
If I write instead:
...LiveCode will likely think that 'myCommand' is a variable, and will try to evaluate it to get the string it needs.
It seems what you need to do is this:
Similarly, the problem in your "Calculate" handler seems to be the line:
Code: Select all
set the tAccUO of this card to (multiply (tUO of this card,tPrice of this card))
When you are accessing custom properties, you should use "
the <property name>". If you omit the
"the", the compiler thinks that the word 'tUO' is probably a variable, rather than a property, and it chokes!
The following compiles without any problems:
Code: Select all
set the tAccUO of this card to (multiply(the tUO of this card,the tPrice of this card))
I hope this helps!
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 11:12 am
by Simon
hmmm... you've got a bit too much going on.
on mouseUp
Calculate
end mouseUp
on Calculate
put (fld "Price Input" * (4/100)) into tAccUO
end Calculate
Simon
Edit: Oh yes... maybe it's a custom property.
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 11:14 am
by ninjabunny14
@icouto
Thanks ever so much it almost works!
However, with the new code you sent me:
Code: Select all
set the tAccUO of this card to (multiply(the tUO of this card,the tPrice of this card))
Still comes up with and error :O
execution error at line 11 (Function: error in function handler) near "multiply", char 33
I promise you I copied and pasted it. Any ideas?
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 11:16 am
by ninjabunny14
@ Simon
Simon wrote:
on Calculate
put (fld "Price Input" * (4/100)) into tAccUO
end Calculate
What does fld mean?
Thanks for all the help!
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 11:20 am
by Simon
Shorthand for field
Simon
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 11:25 am
by ninjabunny14
Re: Multiplying 2 temporary variables & Using custom handler
Posted: Wed May 29, 2013 12:16 pm
by Klaus
Hi friends,
MULTIPLY (a reserved word!) is the name of a HANDLER (not a function!) so you would need to:
...
multiply x BY y
...
Best
Klaus