onExtraDragValue
fun onExtraDragValue(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: (page: TabPage, <Error class: unknown class>) -> <Error class: unknown class>): <Error class: unknown class>(source)
This signal is emitted when the dropped content is preloaded.
In order for data to be preloaded, property@TabBar:extra-drag-preload must be set to TRUE.
The content must be of one of the types set up via method@TabBar.setup_extra_drop_target.
See property@Gtk.DropTarget:value.
Since
1.3
Parameters
connectFlags
a combination of ConnectFlags
handler
the Callback to connect. Params: page the page matching the tab the content was dropped onto; value the GValue being dropped. Returns the preferred action for the drop on @page