How to add event listener

[betterRunner]

Hi all,

I am sorry but I am a newer of PDF-XChange Editor SDK, and I think I can not figure out where to add the event listener in the fulldemo of Editor SDK in c#.

To be specific, I know that for example the event of adding annotation can be looked up in https://sdkhelp.pdf-xchange.com/view/PXV:PXV_Events, but I don't know how to add this into the code of "fulldemo", an example about how to add it in the code would be greatfu.

Thank you very much!

[Sasha - Tracker Dev Team]

Hello betterRunner,

There is an event listener in the FullDemo already - search for the pdfCtl_OnEvent method. To add the needed events, first add them into the IDS enum and then you can use the if statement inside of the pdfCtl_OnEvent to catch them.

Cheers,
Alex

[betterRunner]

Hello Alex,

Thanks for the help.

The pdfCtl_OnEvent does receive a lot of events like scrolling the page and so on. But I found it does not trigger when adding one highlight annotation, where the e.annots.inserted should be called.

So why is that, actually I can even see the code (commented) in pdfCtl_OnEvent

Code: Select all

PDFXEdit.IPXV_AnnotsEvent annotsEvent = (PDFXEdit.IPXV_AnnotsEvent)e.pEvent; 

,
but the event just has not triggered.

Thanks a lot!

[Sasha - Tracker Dev Team]

Hello betterRunner,

Like I said before, to listen to the needed event you will need to add it by using the EnableEventListening method of the IPXV_Control. In the FullDemo application, it is being done via the RegisterEvents method that reads the contents of the IDS enum and launches the EnableEventListening method for each of them.
Basically, if you add the e_annots_inserted element to the enum, the OnEvent will handle that event, though I advise adding the if statement before the commented code so that you would read the correct event.

Cheers,
Alex

[betterRunner]

Hello Alex,

Thanks for your help, it works after adding e_annots_inserted in enum as what you said.

Thanks.

[Sasha - Tracker Dev Team]