Beginning/end number of the measures in a system

[cecilios]

@npiegdon In discussion #377 it was requested information about how to get the beginning/end number of the measures in a system

This request is difficult to answer without referring to an instrument. Take into account that in polymetric music (music in which not all instruments have the same time signature) the measure number is not a common value for all instruments and, thus measure numbers in a system will depend on which instrument you refer to. For instance, in the typical example from Mozart's opera Don Giovanni, how many measures are in this system? two or three?

Thus, it is necessary to specify not only the system number but also an instrument. But assuming that your app will only display the piano part, and the remaining parts, if any, will be hidden, in your app iInstr will be always 0.

GmoBoxSystem* pSystem =  ...
int iFirstMeasure = pSystem->get_first_measure(iInstr);    //0..n-1, referred to current layout
int numMeasures = pSystem->get_num_measures(iInstr);

Important. Method get_num_measures() is not currently defined. But is is just to lines of code so I will add it in a coming PR.

Let me know if this solves your needs.

[npiegdon]

Well, that's terrifying. 😅

Having to specify an instrument is a good strategy and should work for my purposes. Thanks!

[cecilios]

PR #385 adds the get_num_measures() method.

[cecilios]

I am closing this issue as it appears to be resolved. If you believe things are still unresolved please let me know and I can reopen if needed.