Adds scrollbars to its child widget.
GtkScrolledWindow is a GtkBin subclass: it's a container
the accepts a single child widget. GtkScrolledWindow adds scrollbars
to the child widget.
The scrolled window can work in two ways. Some widgets have native
scrolling support; these widgets have "slots" for GtkAdjustment
objects. The scrolled window installs GtkAdjustment objects in the
child window's slots using the set_scroll_adjustments_signal, found in
GtkWidgetClass. (Conceptually, these widgets implement a "Scrollable"
interface; because GTK+ 1.2 lacks multiple inheritance, this interface
is hackily implemented as a signal in GtkWidgetClass.)
The second way to use the scrolled window is useful with widgets that
lack the set_scroll_adjustments_signal. The GtkViewport widget acts as
a proxy, implementing scrollability for child widgets that lack their
own scrolling capabilities.
If a widget has native scrolling abilities, it can be added to the
GtkScrolledWindow with gtk_container_add(). If a widget does not, you
must first add the widget to a GtkViewport, then add the GtkViewport
to the scrolled window. The convenience function
gtk_scrolled_window_add_with_viewport() does exactly this, so you can
ignore the presence of the viewport.
There are no public fields in the GtkScrolledWindow struct; it should
only be accessed using the functions below.
Creates a new scrolled window. The two arguments are the scrolled
window's adjustments; these will be shared with the scrollbars and the
child widget to keep the bars in sync with the child. Usually you want
to pass NULL for the adjustments, which will cause the scrolled window
to create them for you.
|hadjustment :||Horizontal adjustment.|
|vadjustment :||Vertical adjustment.|
|Returns :||New scrolled window.
Returns the horizontal scrollbar's adjustment, used to connect the
horizontal scrollbar to the child widget's horizontal scroll
Returns the vertical scrollbar's adjustment, used to connect the
vertical scrollbar to the child widget's vertical scroll
Sets the scrollbar policy for the horizontal and vertical scrollbars.
The policy determines when the scrollbar should appear; it is a value
from the GtkPolicyType enumeration. If GTK_POLICY_ALWAYS, the
scrollbar is always present; if GTK_POLICY_NEVER, the scrollbar is
never present; if GTK_POLICY_AUTOMATIC, the scrollbar is present only
if needed (that is, if the slider part of the bar would be smaller
than the trough - the display is larger than the page size).
|scrolled_window :||A GtkScrolledWindow.|
|hscrollbar_policy :||Policy for horizontal bar.|
|vscrollbar_policy :||Policy for vertical bar.
Used to add children without native scrolling capabilities. This is
simply a convenience function; it is equivalent to adding the
unscrollable child to a viewport, then adding the viewport to the
scrolled window. If a child has native scrolling, use
gtk_container_add() instead of this function.
The viewport scrolls the child by moving its GdkWindow, and takes the
size of the child to be the size of its toplevel GdkWindow. This will
be very wrong for most widgets that support native scrolling; for
example, if you add a GtkCList with a viewport, the whole widget will
scroll, including the column headings. Thus GtkCList supports
scrolling already, and should not be used with the GtkViewport proxy.
A widget supports scrolling natively if the
set_scroll_adjustments_signal field in GtkWidgetClass is non-zero,
i.e. has been filled in with a valid signal identifier.
Sets the GtkAdjustment for the horizontal scrollbar.
Determines the location of the child widget with respect to the
scrollbars. The default is GTK_CORNER_TOP_LEFT, meaning the child is
in the top left, with the scrollbars underneath and to the right.
Other values in GtkCornerType are GTK_CORNER_TOP_RIGHT,
GTK_CORNER_BOTTOM_LEFT, and GTK_CORNER_BOTTOM_RIGHT.
Sets the GtkAdjustment for the vertical scrollbar.