GtkObject
`-- GtkWidget
       `-- GtkContainer
              `-- GtkBin
                     `-- GtkViewport

Direct subclasses

None.

Description

The GtkViewport object is only used alongside a GtkScrolledWindow, and provides scrolling capability where the child widget being added to a scrolled window is not otherwise scrollable.

It is not possible in most cases to use it outside this context, as its adjustment values are set internally by the child's sizing policies and can neither be overridden manually nor used directly. Note that directional keybindings in a non-scrolling aware widget are not usually bound to any adjustment value by default; the GtkViewport simply allows the use of scrollbars with such a widget. The exception that proves this rule is GtkList, which is set up so that it can be made to be scrollable via the keyboard if it is added to a GtkViewport.

In most circumstances, it is easier to construct the viewport object by using the convenience method add_with_viewport() rather than by using its own constructor.