HOw to detect changes on thumbnail viewer

Example requests & Code samples for GdPicture Toolkits.
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ejbrandino
Posts: 38
Joined: Thu Sep 22, 2016 4:56 am

HOw to detect changes on thumbnail viewer

Post by ejbrandino » Fri Dec 02, 2016 6:39 am

Hi,
Can anyone help me, how do you detect if there are changes made on the thumbnail viewer (eg. re-ordered pages, placed a stamp, placed annotations) and prompts you to save changes upon closing the form?

Thank you very much.

Regards,
Eric

Cedric
Posts: 263
Joined: Sun Sep 02, 2012 7:30 pm

Re: HOw to detect changes on thumbnail viewer

Post by Cedric » Fri Dec 02, 2016 3:52 pm

Detecting a page reordering is easy, you just have to catch the ItemMoved event documented here: https://guides.gdpicture.com/content/we ... ed_EV.html

There is no point detecting any other action such as placing a stamp or another annotation since it does not happen on the thumbnail but on the document attached and there are all the required events to catch those in GdViewer.

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