CenterBox

open class CenterBox : Widget, CenterBoxProtocol

GtkCenterBox arranges three children in a row, keeping the middle child centered as well as possible.

An example GtkCenterBox

To add children to GtkCenterBox, use [methodGtk.CenterBox.set_start_widget], [methodGtk.CenterBox.set_center_widget] and [methodGtk.CenterBox.set_end_widget].

The sizing and positioning of children can be influenced with the align and expand properties of the children.

GtkCenterBox as GtkBuildable

The GtkCenterBox implementation of the GtkBuildable interface supports placing children in the 3 positions by specifying “start”, “center” or “end” as the “type” attribute of a <child> element.

CSS nodes

GtkCenterBox uses a single CSS node with the name “box”,

The first child of the GtkCenterBox will be allocated depending on the text direction, i.e. in left-to-right layouts it will be allocated on the left and in right-to-left layouts on the right.

In vertical orientation, the nodes of the children are arranged from top to bottom.

Accessibility

GtkCenterBox uses the GTK_ACCESSIBLE_ROLE_GROUP role.

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

    Declaration

    Swift

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

    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 CenterBox instance.

    Declaration

    Swift

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

    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 CenterBox 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 CenterBox 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 CenterBox instance.

    Declaration

    Swift

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

    Parameters

    op

    pointer to the underlying object
    Show on GitHub

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

    Declaration

    Swift

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

    Parameters

    op

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

    Declaration

    Swift

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

    Parameters

    op

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

    Declaration

    Swift

    @inlinable
public init<T>(centerBox other: T) where T : CenterBoxProtocol

    Parameters

    other

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

    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 CenterBoxProtocol.

    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 CenterBoxProtocol.

    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 CenterBoxProtocol.

    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 CenterBoxProtocol.

    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 CenterBoxProtocol.

    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 CenterBoxProtocol.

    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 CenterBoxProtocol.

    Declaration

    Swift

    @inlinable
override public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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  • Creates a new GtkCenterBox.

    Declaration

    Swift

    @inlinable
public init()
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