public void Start()
{
_cancellationTokenSource = new CancellationTokenSource();
CancellationToken token = _cancellationTokenSource.Token;
Task listener = Task.Factory.StartNew(() =>
{
while (true)
{
IntPtr newFocusedWindowHandle = WindowApi.GetForegroundWindow();
string newFocusedWindowTitle = WindowApi.GetWindowTitle(newFocusedWindowHandle);
//Only trigger event & update when focused window title is different
if (newFocusedWindowTitle != null && newFocusedWindowTitle != FocusedWindowInfo?.Title)
{
int threadId = WindowApi.GetWindowProcessId(newFocusedWindowHandle, out int processId);
WindowInfo newFocusedWindowInfo = new WindowInfo()
{
Title = newFocusedWindowTitle,
Handle = newFocusedWindowHandle,
ProcessId = processId,
ThreadId = threadId
};
FocusedWindowTitleChanged?.Invoke(this, new FocusedWindowTitleChangedEventArgs()
{
OldFocusedWindow = FocusedWindowInfo,
NewFocusedWindow = newFocusedWindowInfo
});
FocusedWindowInfo = newFocusedWindowInfo;
}
Thread.Sleep(PollDelayMilliseconds);
if (token.IsCancellationRequested)
{
break;
}
}
}, token, TaskCreationOptions.LongRunning, TaskScheduler.Default);
}