/// <summary>
/// Creates new HID data reader.
/// </summary>
/// <param name="window">Window instance, which will reveice the WM_INPUT messages</param>
public HidDataReader(Window window)
{
if (window == null)
{
throw new ArgumentNullException("window");
}
this.window = window;
this.window.Closed += this.OnWindowClosed;
var handle = new WindowInteropHelper(this.window).Handle;
var source = HwndSource.FromHwnd(handle);
source.AddHook(this.WndProc);
var devices = RawInputHelper.GetDevices();
int i = 0;
RAWINPUTDEVICE[] rids = new RAWINPUTDEVICE[devices.Count];
// Setting handle to each rid device to receive the WM_INPUT message
foreach (var device in devices)
{
rids[i].usUsagePage = device.UsagePage;
rids[i].usUsage = device.UsageCollection;
rids[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;
rids[i].hwndTarget = handle;
i++;
}
this.handler = new HidHandler(rids);
this.handler.OnHidEvent += this.OnHidEvent;
}
public void Dispose()
{
if (this.handler != null)
{
this.handler.OnHidEvent -= this.OnHidEvent;
this.handler.Dispose();
this.handler = null;
if (this.window != null)
{
var windowHandle = new WindowInteropHelper(this.window).Handle;
var source = HwndSource.FromHwnd(windowHandle);
source.RemoveHook(this.WndProc);
}
}
}