[JW Lua] More class questions

[Jari Williamsson]

On 2013-08-29 21:32, Charles O. Lawrence wrote:

> What is it about FCUI that doesn’t work?

FCUI is a special class that's only has one single global instance, 
which is accessed through "finenv.UI()", such as "finenv.UI():Beep()".

> You said “note” classes can be accessed through an iterator, like in the
> below test script, or through a collection.  Please show an example of
> how to access a “note” class property, say “Staff”, through a
> collection.

Here's an example that loads entry data to a FCNoteEntryCell object:

-- Assuming a staff with the id 1 exists in the document...
entrycell = finale.FCNoteEntryCell(1, 1)
-- Load all the frame's visible layers (can
-- be changed by setting the LoadLayerMode)
entrycell:Load()
print (entrycell.Count, "FCNoteEntry object loaded")
for myentry in each(entrycell) do
     -- Do something with the note entry here
end


> If an FCNoteEntry is a collection of FCNote objects, how
> can you access the properties/methods of one of those objects?

To iterate through all notes in each chord and print the displacement 
value of each note:
---
for myentry in eachentry(finenv.Region()) do
     for mynote in each(myentry) do
         print (mynote.Displacement)
     end
end
---

> If a property is non-existent, i.e. misspelled, like in e.Visable, no
> error is generated.  Is this a consequence of the loose typing inherent
> in Lua?

When you have a R-value that is non-defined, you'll get a "nil" result. 
For example:
v = e.Visable -- misspelled property, setting v to "nil"

But:
e.Visable = true
...gives an syntax error.


Best regards,

Jari Williamsson