Scrollable

open class Scrollable : ScrollableProtocol

GtkScrollable is an interface that is implemented by widgets with native scrolling ability.

To implement this interface you should override the GtkScrollable:hadjustment and GtkScrollable:vadjustment properties.

Creating a scrollable widget

All scrollable widgets should do the following.

  • When a parent widget sets the scrollable child widget’s adjustments, the widget should populate the adjustments’ GtkAdjustment:lower, GtkAdjustment:upper, GtkAdjustment:step-increment, GtkAdjustment:page-increment and GtkAdjustment:page-size properties and connect to the GtkAdjustment::value-changed signal.

  • Because its preferred size is the size for a fully expanded widget, the scrollable widget must be able to cope with underallocations. This means that it must accept any value passed to its GtkWidgetClass.size_allocate() function.

  • When the parent allocates space to the scrollable child widget, the widget should update the adjustments’ properties with new values.

  • When any of the adjustments emits the GtkAdjustment::value-changed signal, the scrollable widget should scroll its contents.

The Scrollable type acts as an owner of an underlying GtkScrollable instance. It provides the methods that can operate on this data type through ScrollableProtocol conformance. Use Scrollable as a strong reference or owner of a GtkScrollable instance.

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  • ptr 
    Untyped pointer to the underlying `GtkScrollable` instance.

    For type-safe access, use the generated, typed pointer scrollable_ptr property instead.

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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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 Scrollable instance.

    Declaration

    Swift

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

    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 Scrollable instance.

    Declaration

    Swift

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

    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 Scrollable instance.

    Declaration

    Swift

    @inlinable
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 Scrollable instance.

    Declaration

    Swift

    @inlinable
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 Scrollable instance.

    Declaration

    Swift

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

    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 Scrollable instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • Designated initialiser from the underlying C data type. GtkScrollable does not allow reference counting, so despite the name no actual retaining will occur. i.e., ownership is transferred to the Scrollable instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
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  • Reference intialiser for a related type that implements ScrollableProtocol GtkScrollable does not allow reference counting.

    Declaration

    Swift

    @inlinable
public init<T>(_ other: T) where T : ScrollableProtocol

    Parameters

    other

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

    Declaration

    Swift

    @inlinable
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 ScrollableProtocol.

    Declaration

    Swift

    @inlinable
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 ScrollableProtocol.

    Declaration

    Swift

    @inlinable
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 ScrollableProtocol.

    Declaration

    Swift

    @inlinable
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 ScrollableProtocol.

    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 ScrollableProtocol.

    Declaration

    Swift

    @inlinable
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 ScrollableProtocol.

    Declaration

    Swift

    @inlinable
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 ScrollableProtocol.

    Declaration

    Swift

    @inlinable
public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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