HOw to detect changes on thumbnail viewer

[ejbrandino]

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]

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