DragRef

public struct DragRef : DragProtocol, GWeakCapturing

The DragRef type acts as a lightweight Swift reference to an underlying GdkDrag instance. It exposes methods that can operate on this data type through DragProtocol conformance. Use DragRef only as an unowned reference to an existing GdkDrag instance.

The GdkDrag object represents the source of an ongoing DND operation.

A GdkDrag is created when a drag is started, and stays alive for duration of the DND operation. After a drag has been started with [funcGdk.Drag.begin], the caller gets informed about the status of the ongoing drag operation with signals on the GdkDrag object.

GTK provides a higher level abstraction based on top of these functions, and so they are not normally needed in GTK applications. See the “Drag and Drop” section of the GTK documentation for more information.

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

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

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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Drag Class

  • Designated initialiser from the underlying C data type

    Declaration

    Swift

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

    Declaration

    Swift

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

    Declaration

    Swift

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

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafePointer<GdkDrag>?)
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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 DragProtocol

    Declaration

    Swift

    @inlinable
init<T>(_ other: T) where T : DragProtocol
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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) -> DragRef where T : DragProtocol
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to DragProtocol.

    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 DragProtocol.

    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 DragProtocol.

    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 DragProtocol.

    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 DragProtocol.

    Declaration

    Swift

    @inlinable
init(opaquePointer: OpaquePointer)
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  • Starts a drag and creates a new drag context for it.

    This function is called by the drag source. After this call, you probably want to set up the drag icon using the surface returned by [methodGdk.Drag.get_drag_surface].

    This function returns a reference to the [classGdk.Drag] object, but GTK keeps its own reference as well, as long as the DND operation is going on.

    Note: if actions include GDK_ACTION_MOVE, you need to listen for the [signalGdk.Drag::dnd-finished] signal and delete the data at the source if [methodGdk.Drag.get_selected_action] returns GDK_ACTION_MOVE.

    Declaration

    Swift

    @inlinable
static func begin<ContentProviderT, DeviceT, SurfaceT>(surface: SurfaceT, device: DeviceT, content: ContentProviderT, actions: DragAction, dx: CDouble, dy: CDouble) -> DragRef! where ContentProviderT : ContentProviderProtocol, DeviceT : DeviceProtocol, SurfaceT : SurfaceProtocol
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