When a widget receives a call to the snapshot function,
it must send synthetic vfuncGtk.Widget.snapshot calls
to all children. This function provides a convenient way
of doing this. A widget, when it receives a call to its
vfuncGtk.Widget.snapshot function, calls
gtk.widget.Widget.snapshotChild once for each child, passing in
the snapshot the widget received.
gtk.widget.Widget.snapshotChild takes care of translating the origin of
snapshot, and deciding whether the child needs to be snapshot.
This function does nothing for children that implement gtk.native.Native.
Snapshot the a child of widget.
When a widget receives a call to the snapshot function, it must send synthetic vfuncGtk.Widget.snapshot calls to all children. This function provides a convenient way of doing this. A widget, when it receives a call to its vfuncGtk.Widget.snapshot function, calls gtk.widget.Widget.snapshotChild once for each child, passing in the snapshot the widget received.
gtk.widget.Widget.snapshotChild takes care of translating the origin of snapshot, and deciding whether the child needs to be snapshot.
This function does nothing for children that implement gtk.native.Native.