Interface Sidebar.DropEnterCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
Sidebar
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public static interface Sidebar.DropEnterCallback extends FunctionPointer

Functional interface declaration of the DropEnterCallback callback.

Since:
1.9
See Also:

  • Method Details

    • run

      Set<DragAction> run(int index)

      Emitted when the pointer enters the item at index.

      Applications can use this to set their default drop action even when Sidebar:drop-preload is set to FALSE.

      See Gtk.DropTarget::enter.

      Since:
      1.9

    • upcall

      default int upcall(MemorySegment sourceSidebar, int index)
      The upcall method is called from native code. The parameters are marshaled and run(int) is executed.

    • toCallback

      default MemorySegment toCallback(Arena arena)
      Creates a native function pointer to the upcall(MemorySegment, int) method.
      Specified by:
      toCallback in interface FunctionPointer
      Parameters:
      arena - the arena in which the function pointer is allocated
      Returns:
      the native function pointer