private void Window_Loaded(object sender, RoutedEventArgs e)
{
if (this.dispatcher == null)
{
this.dispatcher = this.Dispatcher;
this.dispatcherHooks = this.dispatcher.Hooks;
}
WindowInteropHelper wndHelper = new WindowInteropHelper(this);
IntPtr wpfHwnd = wndHelper.Handle;
_keyboardDriver = new RawKeyboard(wpfHwnd);
_keyboardDriver.EnumerateDevices();
_devNotifyHandle = RegisterForDeviceNotifications(wpfHwnd);
System.Windows.Interop.ComponentDispatcher.ThreadFilterMessage +=
new System.Windows.Interop.ThreadMessageEventHandler(ComponentDispatcher_ThreadFilterMessage);
System.Windows.Interop.ComponentDispatcher.ThreadPreprocessMessage +=
new System.Windows.Interop.ThreadMessageEventHandler(ComponentDispatcher_ThreadPreprocessMessage);
this.KeyPressed += new RawKeyboard.DeviceEventHandler(OnKeyPressed);
}
public DispatcherWorkerThreadDetails(Thread thread)
{
this.Thread = thread;
Dispatcher dispatcher;
// Get the Dispatcher instance for the thread
do
{
dispatcher = Dispatcher.FromThread(thread);
// The dispatcher might not have been spun up yet so, if not, sleep and try again until it is
if (dispatcher == null)
{
Thread.Sleep(100);
}
} while (dispatcher == null);
// Hook the events that tell us when the Dispatcher is actually doing something
DispatcherHooks dispatcherHooks = dispatcher.Hooks;
dispatcherHooks.DispatcherInactive += (s, a) => this.HasWork = false;
dispatcherHooks.OperationPosted += (s, a) => this.HasWork = true;
}
