GtkScrolledWindow 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 and optionally draws a beveled frame around 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 lacked interface support in the object system, this interface is hackily implemented as a signal in #GtkWidgetClass. The GTK+ 2.0 object system would allow a clean implementation, but it wasn't worth breaking the API.) Widgets with native scroll support include #GtkTreeView, #GtkTextView, and #GtkLayout. For widgets that lack native scrolling support, the #GtkViewport widget acts as an adaptor class, implementing scrollability for child widgets that lack their own scrolling capabilities. Use #GtkViewport to scroll child widgets such as #GtkTable, #GtkBox, and so on. 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. The position of the scrollbars is controlled by the scroll adjustments. See #GtkAdjustment for the fields in an adjustment - for #GtkScrollbar, used by #GtkScrolledWindow, the "value" field represents the position of the scrollbar, which must be between the "lower" field and "upper - page_size." The "page_size" field represents the size of the visible scrollable area. The "step_increment" and "page_increment" fields are used when the user asks to step down (using the small stepper arrows) or page down (using for example the PageDown key). If a #GtkScrolledWindow doesn't behave quite as you would like, or doesn't have exactly the right layout, it's very possible to set up your own scrolling with #GtkScrollbar and for example a #GtkTable. #GtkViewport, #GtkAdjustment, #GtkWidgetClass 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 functionality. @scrolled_window: A #GtkScrolledWindow. @Returns: The horizontal #GtkAdjustment. Returns the vertical scrollbar's adjustment, used to connect the vertical scrollbar to the child widget's vertical scroll functionality. @scrolled_window: A #GtkScrolledWindow. @Returns: The vertical #GtkAdjustment. 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 widget such as #GtkTreeView with a viewport, the whole widget will scroll, including the column headings. Thus, widgets with native scrolling support 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. @scrolled_window: A #GtkScrolledWindow. @child: Widget you want to scroll. 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. @scrolled_window: A #GtkScrolledWindow. @window_placement: Position of the child window. @scrolled_window: @type: Sets the #GtkAdjustment for the horizontal scrollbar. @scrolled_window: A #GtkScrolledWindow. @hadjustment: Horizontal scroll adjustment. Sets the #GtkAdjustment for the vertical scrollbar. @scrolled_window: A #GtkScrolledWindow. @hadjustment: @vadjustment: Vertical scroll adjustment. @scrolled_window: @Returns: @scrolled_window: @hscrollbar_policy: @vscrollbar_policy: @scrolled_window: @Returns: Horizontal adjustment. See gtk_scrolled_window_set_hadjustment(), gtk_scrolled_window_get_hadjustment(). Vertical adjustment. See gtk_scrolled_window_set_vadjustment(), gtk_scrolled_window_get_vadjustment(). Horizontal scrollbar policy (show scrollbar always, never, or "when appropriate"). Vertical scrollbar policy (show scrollbar always, never, or "when appropriate"). Position of child window with respect to scrollbars; top left, top right, bottom left, bottom right. Type of frame drawn around the child of the scrolled window.