Nonexistent topStack

[richmond62]

I am having a problem with a button on a stack called "Nonsense":

Code: Select all

on mouseUp
   palette "Nonsense"
   put the short name of the topStack into STAKK
   if STAKK is empty then
      put "Utter Cack!"
   else
      put STAKK
   end if
   wait 5 seconds
   topLevel "Nonsense"
end mouseUp

What I do NOT understand is why, when there is NO topStack I do not get 'Utter Cack' in the messageBox.

[stam]

2 comments:

1. to see the text in the message box immediately on click, use 'wait with messages' as this allows the interface to update - otherwise the text appears after the 5 seconds have elapsed
2. The topStack is never empty - if no topStack is open, it defaults to revMenuBar (or if the script editor is open, it uses that instead).

You can test the the above with slight modifications to your script:

Code: Select all

on mouseUp
    local STAKK
    palette "Nonsense"
    put the short name of the topStack into STAKK
    if STAKK is empty or STAKK begins with "rev" then
        put "Utter Cack!"
    else
        put STAKK
    end if
    wait 5 seconds with messages
    topLevel "Nonsense"
end mouseUp

[richmond62]

Thank you: I'll check that tomorrow.

[dunbarx]

All.

However this thread plays out, I was surprised to learn that a palette is not, apparently, a "stack", in that after one "palettizes" it, LC no longer "sees" it as one:

Code: Select all

answer the stacks
answer the topStack

The "stacks" does not include it, and the "topStack" return the revMenuBar. When one restores its status by:

Code: Select all

topLevel myStack

it comes back into the fold.

Craig

[dunbarx]

What I mean is, if palletizing a stack takes away its stack "property", what sort of object does it become? And then how does such an object become a stack at all?

Craig

[stam]

Maybe I'm misunderstand your posts Craig?
Not sure a palette loses its 'stack' property, as you can still reference the palette with its stack name.

And the keyword the stacks returns file references to all stacks, including palettes - for example, the following are included when I type put the stacks in the message box:

/Applications/LiveCode 10.0.0 (dp 7).app/Contents/Tools/Toolset/palettes/message-box/revmessagebox.8.rev
/Users/stam/Downloads/nonsense.livecode
/Applications/LiveCode 10.0.0 (dp 7).app/Contents/Tools/Toolset/palettes/menubar/revmenubar.livecodescript
/Applications/LiveCode 10.0.0 (dp 7).app/Contents/Tools/Toolset/palettes/inspector/revinspector.livecodescript

Where the stack 'nonsense.livecode' is a stack I use for testing purposes and turned into a palette and saved it.

Keep in mind that new and unsaved stacks appear as blank lines because they don't have a filename.

Since unsaved stacks have no file name, the file names of unsaved stacks are not included in the list. Instead, each unsaved stack is represented by a blank line in the list.

The file paths of substacks are included, but the stack names themselves are not. This means that if more than one stack in a file is open, that file's path appears more than once in the list returned by the stacks function.