WPF 通过RawInput获取系统全局触摸事件

在做大屏或者平板的业务，或多或少会有监听触摸事件的需求。在WPF 上，监听自身应用的触摸事件是很简单的，可以监听 Windows的 Stylus、Touch、甚至是 Mouse的事件来实现业务逻辑处理。但是如果要监听窗口外的触摸事件，可以使用RawInput.Sharp

 

1、注册触摸屏和笔的设备：

  RawInputDevice.RegisterDevice(HidUsageAndPage.TouchScreen,
                RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);
            RawInputDevice.RegisterDevice(HidUsageAndPage.Pen,
                RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);

 

2、钩子函数获取 带Hid类型的设备

 case RawInputHidData hid:
                        Debug.WriteLine($"Hid {hid.Hid}");
                        text = @$"DevicePath: {hid.Device.DevicePath}
VID:{hid.Device.VendorId:X2} PID:{hid.Device.ProductId:X2}
RawData:{hid.Hid}";

                        Console.WriteLine(text);
                        if (hid is RawInputDigitizerData rawInputDigitizerData)
                        {
                            foreach (var rawInputDigitizerContact in rawInputDigitizerData.Contacts)
                            {
                                text += rawInputDigitizerContact.ToString() + "\r\n";
                            }
                        }
                        Console.WriteLine(text);
                        break;

 

3、完整代码如下：

using Linearstar.Windows.RawInput;
using System.Diagnostics;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace RawInputTest
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Loaded += MainWindow_Loaded;

            
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            var windowInteropHelper = new WindowInteropHelper(this);
            var hwnd = windowInteropHelper.Handle;

            // Get the devices that can be handled with Raw Input.
            var devices = RawInputDevice.GetDevices();

            RawInputDevice.RegisterDevice(HidUsageAndPage.TouchScreen,
                RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);
            RawInputDevice.RegisterDevice(HidUsageAndPage.Pen,
                RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);

            HwndSource source = HwndSource.FromHwnd(hwnd);
            source.AddHook(Hook);
        }


        private string text;

        private IntPtr Hook(IntPtr hwnd, int msg, IntPtr wparam, IntPtr lparam, ref bool handled)
        {
            const int WM_INPUT = 0x00FF;

            // You can read inputs by processing the WM_INPUT message.
            if (msg == WM_INPUT)
            {
                // Create an RawInputData from the handle stored in lParam.
                var data = RawInputData.FromHandle(lparam);

                // You can identify the source device using Header.DeviceHandle or just Device.
                var sourceDeviceHandle = data.Header.DeviceHandle;
                var sourceDevice = data.Device;

                // The data will be an instance of either RawInputMouseData, RawInputKeyboardData, or RawInputHidData.
                // They contain the raw input data in their properties.
                switch (data)
                {
                    case RawInputMouseData mouse:
                        Debug.WriteLine($"Mouse {mouse.Mouse}");
                        break;
                    case RawInputKeyboardData keyboard:
                        Debug.WriteLine(keyboard.Keyboard);
                        break;
                    case RawInputHidData hid:
                        Debug.WriteLine($"Hid {hid.Hid}");



                        text = @$"DevicePath: {hid.Device.DevicePath}
VID:{hid.Device.VendorId:X2} PID:{hid.Device.ProductId:X2}
RawData:{hid.Hid}";

                        Console.WriteLine(text);

                        if (hid is RawInputDigitizerData rawInputDigitizerData)
                        {
                            foreach (var rawInputDigitizerContact in rawInputDigitizerData.Contacts)
                            {
                                text += rawInputDigitizerContact.ToString() + "\r\n";
                            }
                        }
                        Console.WriteLine(text);
                        break;
                }
            }

            return IntPtr.Zero;
        }
    }
}

 

Demo 链接：wutyDemo/RawInputTest at main · wutangyuan/wutyDemo 

参考资料：熙哥的WPF 通过 RawInput 获取触摸消息 - lindexi - 博客园

 

 

2025-10-13 09:05:48【出处】：https://www.cnblogs.com/wuty/p/19056006

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