gtk:drag-source-content (object)

object -- a gtk:drag-source object
content -- a gdk:content-provider object for source, or nil

The accessor for the content slot of the gtk:drag-source class gets or sets the data that is offered by drag operations from this source, in the form of a gdk:content-provider object. When the data is requested in the cause of a DND operation, it will be obtained from the content provider.

This function can be called before a drag is started, or in a handler for the "prepare" signal. You may consider setting the content provider back to nil in a "drag-end" signal handler.