[JW Lua] Measure width in score changes when measure width in a part is changed after Undo/Redo - Workaround

[Wolfixum]

Hello Robert and Jan,

I’ll chime in here to say that I’ve seen this behavior without plug-ins from day one on on internal generated parts within one file. It’s been the biggest reason for exporting individual files or a separate parts file. The work I put into a score to be deleted/messed with by the work I do with parts has always been a problem. Especially with measure widths and extra spaces, Glad you found a solution. Hopefully this will help track down the problem internally. Please send to MM. I have been trying to figure this out for years.

Thank you,
Steve Fiskum

> On Apr 3, 2024, at 9:34 AM, Robert Patterson <robert at robertgpatterson.com> wrote:
> 
> I saw an additional issue, which is that the Undo does not undo the part width setting. I found some notes about this in my Patterson Plugins code, so the problem has been around a while.
> 
> Glad you found a workaround.
> 
> On Wed, Apr 3, 2024 at 9:29 AM Jan Angermüller <jan at angermueller.com <mailto:jan at angermueller.com>> wrote:
>> Thank you for the quick response, Robert!
>> I found a workaround which at least works in the test case below:
>> When I (re-)save the measure width in the score afterwards, it is still the same bug.
>> BUT:
>> When I slightly change the measure width in the score, save it, then restore the original value and save it again, both the measure width in the score and in the parts seem to have the correct value.
>> It seems to set a flag in Finale that the measure width in the score has indeed changed.
>> 
>> I will have to check if this also solves the problem in Perfect Layout.
>> 
>> Here is the new test code with the additional lines in bold:
>> 
>> --Show measure 1 width from score
>> local meas=finale.FCMeasure(1)
>> meas:Load(1)
>> print("Measure Width in Score",meas.Width)
>> 
>> --Load Part 3 and change
>> local p=finale.FCPart(3)
>> p:SwitchTo(); 
>>     p:ViewInDocument()
>>     meas=finale.FCMeasure(1)
>>     meas:Load(1)
>>     print("Measure Width in Part ",p.ID,meas.Width)
>>     meas.Width=360
>>     meas:Save()
>>     print("Measure Width after change",meas.Width)
>> p:SwitchBack(); 
>> 
>> --Go back to score and show measure 1 width
>> p=finale.FCPart(0)
>> p:ViewInDocument()
>> meas=finale.FCMeasure(1)
>> meas:Load(1)
>> meas.Width=meas.Width+1
>> meas:Save()
>> meas.Width=meas.Width-1
>> meas:Save()
>> print("Measure Width in Score",meas.Width)
>> 
>> Jan
>> 
>> 
>> 
>> Am 03.04.2024 um 15:34 schrieb Robert Patterson:
>>> This is a bug in Finale. I doubt it will be fixed. But you could send it to them if you wish.
>>> 
>>> On Wed, Apr 3, 2024 at 7:53 AM Jan Angermüller <jan at angermueller.com <mailto:jan at angermueller.com>> wrote:
>>>> Robert,
>>>> 
>>>> I have noticed several times that undo-ing and re-doing a JW Lua plug-in can change the measure width.
>>>> Finally, I have created a short reproduceable demo that I can't explain.
>>>> 
>>>> The script is below.
>>>> When applied to the score of the attached Finale file, it switches to linked part 3, loads measure 1 and changes its measure width to 360 and then returns to the score.
>>>> The measure width in the score remains unchanged. So far, everything ok.
>>>> Then I undo the plug-in in Finale and click on Edit->Redo ...
>>>> Now the width in measure 1 also changes in the score!
>>>> 
>>>> Here is a video that shows the effect (with a slightly different version of the score):
>>>> https://www.youtube.com/watch?v=lPJd3sq9zQg
>>>> 
>>>> In Perfect Layout it makes Finale's Undo-/Redo feature unusuable, because it (nearly) always changes the measure widths in the score for an unknown  reason.
>>>> Do you have an idea how I can prevent this?
>>>> 
>>>> Jan
>>>> 
>>>> --Show measure 1 width from score
>>>> local meas=finale.FCMeasure(1)
>>>> meas:Load(1)
>>>> print("Measure Width in Score",meas.Width)
>>>> 
>>>> --Load Part 3 and change
>>>> local p=finale.FCPart(3)
>>>> p:SwitchTo(); 
>>>>     p:ViewInDocument()
>>>>     meas=finale.FCMeasure(1)
>>>>     meas:Load(1)
>>>>     print("Measure Width in Part ",p.ID,meas.Width)
>>>>     meas.Width=360
>>>>     meas:Save()
>>>>     print("Measure Width after change",meas.Width)
>>>> p:SwitchBack(); 
>>>> 
>>>> --Go back to score and show measure 1 width
>>>> p=finale.FCPart(0)
>>>> p:ViewInDocument()
>>>> meas=finale.FCMeasure(1)
>>>> meas:Load(1)
>>>> print("Measure Width in Score",meas.Width)
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>>> 
>>> 
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>> 
>> -- 
>> Jan Angermüller
>> Orchideenstieg 13
>> 22297 Hamburg
>> Tel. 040 - 28 94 84 82
>> Mobil 0173 - 99 33 904
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