ScrolledWindow

open class ScrolledWindow : Bin, ScrolledWindowProtocol

GtkScrolledWindow is a container that accepts a single child widget, makes that child scrollable using either internally added scrollbars or externally associated adjustments, and optionally draws a frame around the child.

Widgets with native scrolling support, i.e. those whose classes implement the GtkScrollable interface, are added directly. For other types of widget, the class GtkViewport acts as an adaptor, giving scrollability to other widgets. GtkScrolledWindow’s implementation of gtk_container_add() intelligently accounts for whether or not the added child is a GtkScrollable. If it isn’t, GtkScrolledWindow wraps the child in a GtkViewport and adds that for you. Therefore, you can just add any child widget and not worry about the details.

If gtk_container_add() has added a GtkViewport for you, you can remove both your added child widget from the GtkViewport, and the GtkViewport from the GtkScrolledWindow, like this:

(C Language Example):

GtkWidget *scrolled_window = gtk_scrolled_window_new (NULL, NULL);
GtkWidget *child_widget = gtk_button_new ();

// GtkButton is not a GtkScrollable, so GtkScrolledWindow will automatically
// add a GtkViewport.
gtk_container_add (GTK_CONTAINER (scrolled_window),
                   child_widget);

// Either of these will result in child_widget being unparented:
gtk_container_remove (GTK_CONTAINER (scrolled_window),
                      child_widget);
// or
gtk_container_remove (GTK_CONTAINER (scrolled_window),
                      gtk_bin_get_child (GTK_BIN (scrolled_window)));

Unless GtkScrolledWindow:policy is GTK_POLICY_NEVER or GTK_POLICY_EXTERNAL, GtkScrolledWindow adds internal GtkScrollbar widgets around its child. The scroll position of the child, and if applicable the scrollbars, is controlled by the GtkScrolledWindow:hadjustment and GtkScrolledWindow:vadjustment that are associated with the GtkScrolledWindow. See the docs on GtkScrollbar for the details, but note that the “step_increment” and “page_increment” fields are only effective if the policy causes scrollbars to be present.

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 GtkGrid.

Touch support

GtkScrolledWindow has built-in support for touch devices. When a touchscreen is used, swiping will move the scrolled window, and will expose ‘kinetic’ behavior. This can be turned off with the GtkScrolledWindow:kinetic-scrolling property if it is undesired.

GtkScrolledWindow also displays visual ‘overshoot’ indication when the content is pulled beyond the end, and this situation can be captured with the GtkScrolledWindow::edge-overshot signal.

If no mouse device is present, the scrollbars will overlayed as narrow, auto-hiding indicators over the content. If traditional scrollbars are desired although no mouse is present, this behaviour can be turned off with the GtkScrolledWindow:overlay-scrolling property.

CSS nodes

GtkScrolledWindow has a main CSS node with name scrolledwindow.

It uses subnodes with names overshoot and undershoot to draw the overflow and underflow indications. These nodes get the .left, .right, .top or .bottom style class added depending on where the indication is drawn.

GtkScrolledWindow also sets the positional style classes (.left, .right, .top, .bottom) and style classes related to overlay scrolling (.overlay-indicator, .dragging, .hovering) on its scrollbars.

If both scrollbars are visible, the area where they meet is drawn with a subnode named junction.

The ScrolledWindow type acts as a reference-counted owner of an underlying GtkScrolledWindow instance. It provides the methods that can operate on this data type through ScrolledWindowProtocol conformance. Use ScrolledWindow as a strong reference or owner of a GtkScrolledWindow instance.

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  • Designated initialiser from the underlying `C` data type.

    This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
public init(_ op: UnsafeMutablePointer<GtkScrolledWindow>)

    Parameters

    op

    pointer to the underlying object
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  • Designated initialiser from a constant pointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
public init(_ op: UnsafePointer<GtkScrolledWindow>)

    Parameters

    op

    pointer to the underlying object
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  • Optional initialiser from a non-mutating gpointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
override public init!(gpointer op: gpointer?)

    Parameters

    op

    gpointer to the underlying object
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  • Optional initialiser from a non-mutating gconstpointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
override public init!(gconstpointer op: gconstpointer?)

    Parameters

    op

    pointer to the underlying object
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  • Optional initialiser from a constant pointer to the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
public init!(_ op: UnsafePointer<GtkScrolledWindow>?)

    Parameters

    op

    pointer to the underlying object
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  • Optional initialiser from the underlying C data type. This creates an instance without performing an unbalanced retain i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
public init!(_ op: UnsafeMutablePointer<GtkScrolledWindow>?)

    Parameters

    op

    pointer to the underlying object
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  • Designated initialiser from the underlying C data type. Will retain GtkScrolledWindow. i.e., ownership is transferred to the ScrolledWindow instance.

    Declaration

    Swift

    @inlinable
public init(retaining op: UnsafeMutablePointer<GtkScrolledWindow>)

    Parameters

    op

    pointer to the underlying object
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  • Reference intialiser for a related type that implements ScrolledWindowProtocol Will retain GtkScrolledWindow.

    Declaration

    Swift

    @inlinable
public init<T>(scrolledWindow other: T) where T : ScrolledWindowProtocol

    Parameters

    other

    an instance of a related type that implements ScrolledWindowProtocol
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
override public init<T>(cPointer p: UnsafeMutablePointer<T>)

    Parameters

    cPointer

    pointer to the underlying object
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  • Unsafe typed, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
override public init<T>(retainingCPointer cPointer: UnsafeMutablePointer<T>)

    Parameters

    cPointer

    pointer to the underlying object
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
override public init(raw p: UnsafeRawPointer)

    Parameters

    p

    raw pointer to the underlying object
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  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
override public init(retainingRaw raw: UnsafeRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
public required init(raw p: UnsafeMutableRawPointer)

    Parameters

    p

    mutable raw pointer to the underlying object
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  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
required public init(retainingRaw raw: UnsafeMutableRawPointer)

    Parameters

    raw

    mutable raw pointer to the underlying object
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
override public init(opaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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  • Unsafe untyped, retaining initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ScrolledWindowProtocol.

    Declaration

    Swift

    @inlinable
override public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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  • 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 nil for the adjustments, which will cause the scrolled window to create them for you.

    Declaration

    Swift

    @inlinable
public init<AdjustmentT>(hadjustment: AdjustmentT?, vadjustment: AdjustmentT?) where AdjustmentT : AdjustmentProtocol
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  • Convenience constructor

    Declaration

    Swift

    @inlinable
convenience init<T>(vAdjustment: T!) where T : AdjustmentProtocol

    Parameters

    vAdjustment

    optional vertical adjustment
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  • Convenience constructor with a nil adjustment

    Declaration

    Swift

    @inlinable
convenience init(vAdjustment: AdjustmentRef? = nil)

    Parameters

    vAdjustment

    optional vertical adjustment
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