Layout

open class Layout : Container, LayoutProtocol

GtkLayout is similar to GtkDrawingArea in that it’s a “blank slate” and doesn’t do anything except paint a blank background by default. It’s different in that it supports scrolling natively due to implementing GtkScrollable, and can contain child widgets since it’s a GtkContainer.

If you just want to draw, a GtkDrawingArea is a better choice since it has lower overhead. If you just need to position child widgets at specific points, then GtkFixed provides that functionality on its own.

When handling expose events on a GtkLayout, you must draw to the GdkWindow returned by gtk_layout_get_bin_window(), rather than to the one returned by gtk_widget_get_window() as you would for a GtkDrawingArea.

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

    Declaration

    Swift

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

    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 Layout instance.

    Declaration

    Swift

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

    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 Layout 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 Layout 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 Layout instance.

    Declaration

    Swift

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

    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 Layout instance.

    Declaration

    Swift

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

    Parameters

    op

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

    Declaration

    Swift

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

    Parameters

    op

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

    Declaration

    Swift

    @inlinable
public init<T>(layout other: T) where T : LayoutProtocol

    Parameters

    other

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

    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 LayoutProtocol.

    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 LayoutProtocol.

    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 LayoutProtocol.

    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 LayoutProtocol.

    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 LayoutProtocol.

    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 LayoutProtocol.

    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 LayoutProtocol.

    Declaration

    Swift

    @inlinable
override public init(retainingOpaquePointer p: OpaquePointer)

    Parameters

    p

    opaque pointer to the underlying object
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  • Creates a new GtkLayout. Unless you have a specific adjustment you’d like the layout to use for scrolling, pass nil for hadjustment and vadjustment.

    Declaration

    Swift

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