通用游戲手柄協議解析Joystick

微軟出品通用游戲手柄按鍵解析

1. 引用SharpDX.DirectInput.dll（可以通過NuGet包管理安裝），該dll包含獲取接入設備的信息，接入設備的輸入等

2. 創建DirectInput，並獲取Joystick對象

Joystick pad;

private void GetJoyStick()
        {
            var directInput = new DirectInput();
            var joysticGuid = Guid.Empty;
            foreach (var deviceInstance in directInput.GetDevices(DeviceType.Gamepad, DeviceEnumerationFlags.AllDevices))
                joysticGuid = deviceInstance.InstanceGuid;

            if (joysticGuid == Guid.Empty)
                foreach (var deviceInstance in directInput.GetDevices(DeviceType.Joystick, DeviceEnumerationFlags.AllDevices))
                    joysticGuid = deviceInstance.InstanceGuid;
            if (joysticGuid == Guid.Empty)
            {
                MessageBox.Show("未連接搖桿！");
                Environment.Exit(1);
            }

            StringBuilder sb = new StringBuilder();
            pad = new Joystick(directInput, joysticGuid);
            var allEffects = pad.GetEffects();
            foreach (var effectInfo in allEffects)
                sb.Append(effectInfo.Name.ToString());

            StringBuilder sb1 = new StringBuilder();
            pad.Properties.BufferSize = 128;
            pad.Acquire();
        }

3. 實現獲取手柄位移、按鍵輸入的方法

private void GetJoyStickDatas(object sender, EventArgs e)
        {
            JoystickState state = new JoystickState();

            state = pad.GetCurrentState();

            txt1.Text = state.X.ToString();
            txt2.Text = state.Y.ToString();
            txt3.Text = state.Z.ToString();
            txt4.Text = state.AccelerationX.ToString();
            bool[] buttons = state.Buttons;
            int clickedId = 0;
            foreach(bool item in buttons)
            {
                clickedId++;
                if (item)
                    buttonClickTXT.Text = clickedId + " is clicked";
            }
        }

4. 通過定時器定時獲取Joystick對象的輸入

DispatcherTimer m_tmrHistory;

        private void myJoyStick_Loaded(object sender, RoutedEventArgs e)
        {
            m_tmrHistory = new DispatcherTimer();
            m_tmrHistory.Interval = TimeSpan.FromSeconds(0.1);
            m_tmrHistory.Tick += GetJoyStickDatas;
            m_tmrHistory.Start();
        }