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Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 3:38 am
by ClintMA
Can someone explain this to me?
These two lines compile (and work) without problem:
Code: Select all
visual effect scroll up
go next card
But these two line generate an error message:
Code: Select all
visual effect dissolve
go next card
The error message is:
"stack "CD": compilation error at line 17 (Expression: unquoted literal), char 17"
I copied the latter code directly from an example in the "visual effects" entry in LiveCode's Dictionary.
I'm using the Community version 7.1.1 on Windows 7.
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 5:06 am
by Simon
Hi Clint,
The syntax has changed slightly
Code: Select all
lock screen for visual effect
go to card "window 2"
unlock screen with visual effect dissolve
I guess the dictionary hasn't caught up.
Simon
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 9:17 am
by ClintMA
Thanks, Simon!
It sad to think of hours of wasted time people spend on undocumented featues. Not to mention the frustration.
I've long held that an undocumented feature is actually an undocumented bug.
If only the LiveCode developers would pledge that no feature would be released until its documentaion was available to be released simultaneously. (This should be a moral requirement of any sodlftware that advertises itself as easy to learn.)
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 5:54 pm
by FourthWorld
Both forms should work.
I just tested this one:
Code: Select all
visual effect dissolve
go next card
...and it works fine in v7.1.2, and I don't believe it's changed since v7.1.1 (though I haven't reviewed the Release Notes to make sure).
My hunch is that the issue is different, perhaps with regard to the destination card object specifier. Are you using the code as provided, or what there any difference there? It may be helpful to see the full handler to determine what's happening with that.
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 6:22 pm
by Klaus
Hi Richard,
although you can get away with:
Code: Select all
visual effect dissolve
go next card
on the desktop, this might crash on iOS!
So better get used to the new syntax
And yes, it should be documanted better!
Best
Klaus
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 7:25 pm
by FourthWorld
Klaus wrote:although you can get away with:
Code: Select all
visual effect dissolve
go next card
on the desktop, this might crash on iOS!
So better get used to the new syntax
And yes, it should be documanted better!
Interesting mobile limitation. Do you know if the bug report against that Dictionary entry has been filed?
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 7:48 pm
by Klaus
Hi Richard,
FourthWorld wrote:Do you know if the bug report against that Dictionary entry has been filed?
no, sorry.
Best
Klaus
Re: Problem with "dissolve" visual effect
Posted: Tue Feb 09, 2016 8:48 pm
by [-hh]
In LC 7.1.1 and LC 8.0.0 dissolve isn't listed any more among the effects although the main example still uses dissolve.
Perhaps it's also the effect and not only the syntax that makes problems?
Re: Problem with "dissolve" visual effect
Posted: Wed Feb 10, 2016 9:25 am
by ClintMA
Simon,
Unfortunately, I'm still getting an error message with the code you suggested. Here's the code I using (it's in the stack script of a stack call "Splash" that has a substack called "CD"):
Code: Select all
on keyUp theKey
if theKey is space then
if the short name of this stack is "Splash" then
hide this stack
go to stack "CD"
else
lock screen for visual effect
go to card "window 2"
unlock screen with visual effect dissolve
end if
else if theKey is "p" then
-- [Other code here ]
--
--
else if theKey is "c" then
-- [Other code here ]
--
--
end if
end keyUp
The error message occurs on the "unlock screen" line and reads:
stack "Computer Daydreams": compilation error at line 19 (Expression: unquoted literal), char 35
Could the problem be that the script is in the main stack, but is calling for action in the substack? (Just a guess.)
Herman, the Dissolve special effect IS listed in the list of available special effects in the Dictionary for 7.1.1 (near the middle of the list).
Also, could someone explain the part of the suggested visual effect code that reads:
card "window 2"
What is this Window 2? I have been unable to find anything about it in the documentation.
Thanks for everyone's help.
Re: Problem with "dissolve" visual effect
Posted: Wed Feb 10, 2016 11:18 am
by Klaus
ClintMA wrote:... card "window 2"
What is this Window 2? I have been unable to find anything about it in the documentation.
Since it is QUOTED, I highly suspect this is a (very badly chosen) name of the target CARD!
Re: Problem with "dissolve" visual effect
Posted: Wed Feb 10, 2016 3:33 pm
by Simon
Is this a result of "Strict Compilation mode"?
stack "Computer Daydreams": compilation error at line 19 (Expression: unquoted literal), char 35
In which case I think you quote "dissolve".
Yes, "window 2" is a string, could be any name of an existing card.
Simon
Re: Problem with "dissolve" visual effect
Posted: Wed Feb 10, 2016 9:01 pm
by ClintMA
OK, problem solved!
This code works:
Code: Select all
lock screen for visual effect
go to next card
unlock screen with visual effect "dissolve"
Thanks Simon (and the other previous commentors) for your help.