Block external clipboard

[Jean Chapelle <jchapell ulb ac be>]

Is it possible to block a copy selection from an external application.

More precisely, I've got a GtkTextView. I want to autorise copy-paste and cut-paste operations when the copy or cut selection comes from this GtKtextView. I want to block the copy-paste mechanism when the copy selection comes from another applications or anothers widget.

Can you tellme about this ???

Thanks