How to detect that user did annotate

Question

I want to detect that user edited pdf content and then save automatically when the screen is closed. It would be enough to detect that user pressed 'Annotate' button but even better would be to get some 'dirty' flag.

Thanks for a help

SarathKumar Prakash · Accepted Answer

Hi Branislav, 
 
Currently we do not have support to detect whether the annotation button is clicked.But we have “Added” event for each annotation.You can use below events to detect the each annotation operation1.InkAdded,2.FreeTextAnnotationAdded,3.ShapeAnnotationAdded,4.StampAnnotationAdded,5.TextMarkupAdded 
Please follow the below link for more information, 
https://help.syncfusion.com/xamarin/pdf-viewer/getting-started  
  
Regards, 
Sarath Kumar.

Branislav Malovec · Answer

Thanks for proposal, it's probably the best for now. if new annotate option added then checks will have to be expanded, that's a downside of this solution.

SarathKumar Prakash · Answer

Hi Branislav, 
 
if new annotate option added then checks will have to be expanded, that's a downside of this solution. = > Can you explain this elaborately. 
Regards, 
Sarath Kumar.