AntTweakBar.Color4Variable.SetCallback C# (CSharp) Метод

        private void SetCallback(IntPtr pointer, IntPtr clientData)
        {
            float[] data = new float[4]; /* R, G, B, A */
            Marshal.Copy(pointer, data, 0, data.Length);

            if (IsValid(data[0], data[1], data[2], data[3]))
            {
                bool changed = (data[0] != r)
                            || (data[1] != g)
                            || (data[2] != b)
                            || (data[3] != a);

                r = data[0];
                g = data[1];
                b = data[2];
                a = data[3];

                if (changed) {
                    OnChanged(EventArgs.Empty);
                }
            }
        }