private void PreProcessInput(object sender, PreProcessInputEventArgs e)
{
InputReportEventArgs input = e.StagingItem.Input as InputReportEventArgs;
if (input != null)
{
if (input.Report.Type == InputType.Command)
{
RawAppCommandInputReport rawAppCommandInputReport = input.Report as RawAppCommandInputReport;
if (rawAppCommandInputReport != null)
{
// Claim the input for the Command.
input.Device = this;
// Set the proper source
input.Source = GetSourceFromDevice(rawAppCommandInputReport.Device);
}
}
}
}
private void PostProcessInput(object sender, ProcessInputEventArgs e)
{
if (e.StagingItem.Input.RoutedEvent == InputManager.InputReportEvent)
{
if (!e.StagingItem.Input.Handled)
{
InputReportEventArgs inputReportEventArgs = e.StagingItem.Input as InputReportEventArgs;
if (inputReportEventArgs != null)
{
RawAppCommandInputReport rawAppCommandInputReport = inputReportEventArgs.Report as RawAppCommandInputReport;
if (rawAppCommandInputReport != null)
{
IInputElement commandTarget = e.StagingItem.Input.OriginalSource as IInputElement;
if (commandTarget != null)
{
RoutedCommand command = GetRoutedCommand(rawAppCommandInputReport.AppCommand);
if (command != null)
{
// Send the app command to the tree to be handled by UIElements and ContentElements
// that will forward the event to CommandManager.
CommandDeviceEventArgs args = new CommandDeviceEventArgs(this, rawAppCommandInputReport.Timestamp, command);
args.RoutedEvent = CommandDeviceEvent;
args.Source = commandTarget;
e.PushInput(args, e.StagingItem);
}
}
}
}
}
}
else if (e.StagingItem.Input.RoutedEvent == Keyboard.KeyUpEvent ||
e.StagingItem.Input.RoutedEvent == Mouse.MouseUpEvent ||
e.StagingItem.Input.RoutedEvent == Keyboard.GotKeyboardFocusEvent ||
e.StagingItem.Input.RoutedEvent == Keyboard.LostKeyboardFocusEvent)
{
CommandManager.InvalidateRequerySuggested();
}
}
internal IntPtr FilterMessage( IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, ref bool handled )
{
// It is possible to be re-entered during disposal. Just return.
if(null == _source || null == _source.Value)
{
return IntPtr.Zero;
}
if (msg == WindowMessage.WM_APPCOMMAND)
{
// WM_APPCOMMAND message notifies a window that the user generated an application command event,
// for example, by clicking an application command button using the mouse or typing an application command
// key on the keyboard.
RawAppCommandInputReport report = new RawAppCommandInputReport(
_source.Value,
InputMode.Foreground,
SafeNativeMethods.GetMessageTime(),
GetAppCommand(lParam),
GetDevice(lParam),
InputType.Command);
handled = _site.Value.ReportInput(report);
}
return handled ? new IntPtr(1) : IntPtr.Zero ;
}