private StatusDialog(Window owner, string title, BackgroundRequest request, HResult hr, string message, string errorPreamble, Action postAction)
{
instance = this;
this.WindowStartupLocation = WindowStartupLocation.CenterOwner;
this.Owner = owner;
this.Title = title;
this.ErrorStatus = new ErrorStatus();
this.ErrorStatus.Preamble = message;
this.ErrorStatus.SetStatus(ErrorSeverity.Info, null, null);
this.request = request;
this.reportProgress = request as IReportProgress;
this.DataContext = this;
this.originalMessage = message;
this.currentMessage = new MessageNode
{
Preamble = errorPreamble ?? StringResources.UnknownErrorOccurred,
PostAction = postAction
};
InitializeComponent();
if (request != null)
{
request.Dispatched += OnRequestDispatched;
if (reportProgress != null)
{
reportProgress.Progress += OnProgressReport;
}
if (request.IsDispatchComplete)
{
// We were asked to wait on a request that has already been dispatched. Simulate notification
// of the dispatch. Can't call it directly because Close() right now is bad news.
this.Dispatcher.BeginInvoke((Action)(() => { this.OnRequestDispatched(request, EventArgs.Empty); }), DispatcherPriority.Background);
}
}
else
{
SwitchToError(hr, false);
}
this.CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy, OnCopyExecuted));
}
private StatusDialog(Window owner, string title, BackgroundRequest request, HResult hr, string message, string errorPreamble, Action postAction)
{
instance = this;
this.WindowStartupLocation = WindowStartupLocation.CenterOwner;
this.Owner = owner;
this.Title = title;
this.ErrorStatus = new ErrorStatus();
this.ErrorStatus.Preamble = message;
this.ErrorStatus.SetStatus(ErrorSeverity.Info, null, null);
this.request = request;
this.reportProgress = request as IReportProgress;
this.DataContext = this;
this.originalMessage = message;
this.currentMessage = new MessageNode
{
Preamble = errorPreamble ?? StringResources.UnknownErrorOccurred,
PostAction = postAction
};
InitializeComponent();
if (request != null)
{
request.Dispatched += OnRequestDispatched;
if (reportProgress != null)
{
reportProgress.Progress += OnProgressReport;
}
if (request.IsDispatchComplete)
{
// We were asked to wait on a request that has already been dispatched. Simulate notification
// of the dispatch. Can't call it directly because Close() right now is bad news.
this.Dispatcher.BeginInvoke((Action)(() => { this.OnRequestDispatched(request, EventArgs.Empty); }), DispatcherPriority.Background);
}
}
else
{
SwitchToError(hr, false);
}
this.CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy, OnCopyExecuted));
}
void OnRequestDispatched(object sender, EventArgs e)
{
HResult hr = request.Result;
request.Dispatched -= OnRequestDispatched;
request = null;
if (hr.Failed && hr != HResult.E_REQUEST_CANCELED && hr != HResult.E_REQUIRES_PROFILING_MODE)
{
SwitchToError(hr, false);
}
else
{
this.ignoreClose = false;
this.Close();
}
}
public static void DisplayWait(Window owner, string title, BackgroundRequest request, string message, string errorPreamble)
{
// Don't call this if there's already one in flight!
Debug.Assert(instance == null);
if (instance == null)
{
new StatusDialog(owner, title, request, HResult.S_OK, message, errorPreamble, null).ShowDialog();
}
}
void OnRequestDispatched(object sender, EventArgs e)
{
HResult hr = request.Result;
request.Dispatched -= OnRequestDispatched;
request = null;
if (hr.Failed && hr != HResult.E_REQUEST_CANCELED && hr != HResult.E_REQUIRES_PROFILING_MODE)
{
SwitchToError(hr, false);
}
else
{
this.ignoreClose = false;
this.Close();
}
}
internal void OnRequestDispatched(BackgroundRequest request)
{
if (observableRequestList != null)
observableRequestList.Remove(request);
}
public void Enqueue(BackgroundRequest request)
{
HResult hr = ((IBackgroundRequest)request).OnEnqueued(this);
// If OnEnqueued returns failure, it means that the request will already have
// dispatched its return value. No need to put it in the queue.
if (hr.Succeeded)
{
if (observableRequestList != null)
{
if (!this.Dispatcher.CheckAccess())
{
this.Dispatcher.BeginInvoke((Action)(() => observableRequestList.Add(request)));
}
else
{
observableRequestList.Add(request);
}
}
lock (lockObject)
{
this.requests.Enqueue(request);
this.workReadyEvent.Set();
}
}
}
