CheckMouseInput

        public void CheckMouseInput(GameTime gt)
        {
            if (!InputEnabled) return;

            Int32 scrollDelta = 0;
            var pressedList = new List<MouseButton>();
            MouseState ms = Mouse.GetState();

            if (ms.LeftButton   == ButtonState.Pressed) pressedList.Add(MouseButton.Left);
            if (ms.RightButton  == ButtonState.Pressed) pressedList.Add(MouseButton.Right);
            if (ms.MiddleButton == ButtonState.Pressed) pressedList.Add(MouseButton.Middle);
            if (ms.XButton1     == ButtonState.Pressed) pressedList.Add(MouseButton.XButton1);
            if (ms.XButton2     == ButtonState.Pressed) pressedList.Add(MouseButton.XButton2);

            //TODO: Make sure this works.
            if (this.lastScrollValue > ms.ScrollWheelValue)
                pressedList.Add(MouseButton.ScrollUp);
            else if (this.lastScrollValue < ms.ScrollWheelValue)
                pressedList.Add(MouseButton.ScrollDown);

            scrollDelta = this.lastScrollValue - ms.ScrollWheelValue;
            this.ScrollValue = scrollDelta;

            lock (locker)
            {
                foreach (var m in MouseLookup)
                {
                    foreach (var p in Enum.GetNames(typeof(MouseButton)))
                    {
                        if ((!pressedList.Contains((MouseButton)Enum.Parse(typeof(MouseButton), p))))
                        {
                            if ((m.State == ButtonState.Released) &&
                            (m.Context == Globals.GameContext || m.Context == GameContext.Any))
                            {
                                m.Callback(scrollDelta, gt);
                            }

                            if (m.State == ButtonState.Pressed && m.__clicked)
                                m.__clicked = false;
                        }
                    }

                    if (pressedList.Contains(m.Button) && (m.State == ButtonState.Pressed) && (m.Context == Globals.GameContext || m.Context == GameContext.Any))
                    {
                        if (m.PreventSpam && !m.__clicked)
                        {
                            m.Callback(scrollDelta, gt);
                            m.__clicked = true;
                        }
                        else if (!m.PreventSpam)
                            m.Callback(scrollDelta, gt);
                        //else nothing
                    }
                }
            }

            this.lastScrollValue = ms.ScrollWheelValue;
        }