LayoutRef

public struct LayoutRef : LayoutProtocol, GWeakCapturing

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 LayoutRef type acts as a lightweight Swift reference to an underlying GtkLayout instance. It exposes methods that can operate on this data type through LayoutProtocol conformance. Use LayoutRef only as an unowned reference to an existing GtkLayout instance.

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

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

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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Layout Class

  • Designated initialiser from the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafeMutablePointer<GtkLayout>)
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  • Designated initialiser from a constant pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafePointer<GtkLayout>)
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  • Conditional initialiser from an optional pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafeMutablePointer<GtkLayout>?)
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  • Conditional initialiser from an optional, non-mutable pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafePointer<GtkLayout>?)
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  • Conditional initialiser from an optional gpointer

    Declaration

    Swift

    @inlinable
init!(gpointer g: gpointer?)
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  • Conditional initialiser from an optional, non-mutable gconstpointer

    Declaration

    Swift

    @inlinable
init!(gconstpointer g: gconstpointer?)
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  • Reference intialiser for a related type that implements LayoutProtocol

    Declaration

    Swift

    @inlinable
init<T>(_ other: T) where T : LayoutProtocol
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  • This factory is syntactic sugar for setting weak pointers wrapped in GWeak<T>

    Declaration

    Swift

    @inlinable
static func unowned<T>(_ other: T) -> LayoutRef where T : 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
init<T>(cPointer: UnsafeMutablePointer<T>)
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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
init<T>(constPointer: UnsafePointer<T>)
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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
init(mutating 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
init(raw: UnsafeMutableRawPointer)
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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
init(opaquePointer: OpaquePointer)
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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
init<AdjustmentT>(hadjustment: AdjustmentT?, vadjustment: AdjustmentT?) where AdjustmentT : AdjustmentProtocol
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