protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
HwndSource source = HwndSource.FromVisual(this) as HwndSource;
if (null != source)
{
SignalViewModel viewModel = this.DataContext as SignalViewModel;
if (null != viewModel)
{
source.AddHook(viewModel.WindowProc);
}
}
}
private static Mutex CreateMutex(string name)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
// Allow Everyone to signal the mutex from medium or higher integrity levels.
MutexSecurity security = new MutexSecurity();
SignalViewModel.SetSecurity(security);
// Create the mutex without taking ownership.
bool created = false;
Mutex mtx = new Mutex(false, name, out created, security);
return mtx;
}
private static EventWaitHandle CreateEvent(string name, bool auto)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
// Allow everyone to signal the event from medium or higher integrity levels.
EventWaitHandleSecurity security = new EventWaitHandleSecurity();
SignalViewModel.SetSecurity(security);
// Create the event without signaling.
EventResetMode mode = auto ? EventResetMode.AutoReset : EventResetMode.ManualReset;
bool created = false;
EventWaitHandle evt = new EventWaitHandle(false, EventResetMode.AutoReset, name, out created, security);
return evt;
}
public SignalViewModel()
{
this.SetSucceedEventCommand = new RelayCommand(
param => this.SetSucceedEvent()
);
this.SetFailEventCommand = new RelayCommand(
param => this.SetFailEvent()
);
// Create the events and mutex to signal later.
this.succeedEvent = SignalViewModel.CreateEvent(SignalViewModel.SucceedEventName, true);
this.failEvent = SignalViewModel.CreateEvent(SignalViewModel.FailEventName, true);
this.waitMutex = SignalViewModel.CreateMutex(SignalViewModel.WaitMutexName);
this.messages = new ObservableCollection<Message>();
this.TopMost = true;
this.PreventShutdown = true;
}