Interface GLArea.CreateContextCallback

All Superinterfaces:
FunctionPointer
Enclosing class:
GLArea
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 GLArea.CreateContextCallback extends FunctionPointer

Functional interface declaration of the CreateContextCallback callback.

See Also:

  • Method Details

    • run

      GLContext run()

      Emitted when the widget is being realized.

      This allows you to override how the GL context is created. This is useful when you want to reuse an existing GL context, or if you want to try creating different kinds of GL options.

      If context creation fails then the signal handler can use GLArea.setError(GError) to register a more detailed error of how the construction failed.

    • upcall

      default MemorySegment upcall(MemorySegment sourceGLArea)
      The upcall method is called from native code. The parameters are marshaled and run() is executed.

    • toCallback

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