// private void WaitForSpecializedContent()
// {
////#if DEBUG_LOADING_PIVOT_ITEM
// //Debug.WriteLine(" ... but the data isn't ready yet.");
////#endif
// if (!_contentPresenterUnloaded)
// {
// if (_advancedWaitingElement.IsLoadComplete)
// {
// DelayedDispatcherTimer.BeginInvoke(AdditionalLoadTime, FinallyShowContent);
// }
// else
// {
// DelayedDispatcherTimer.BeginInvoke(SmartLoadingDelayingTime, WaitForSpecializedContent);
// }
// }
// }
private void TryTransitionToContent()
{
if (_contentPresenterUnloaded)
{
return;
}
//#if DEBUG_LOADING_PIVOT_ITEM
//Debug.WriteLine("LPI: DataContext of {0} is set to {1}", Header.ToString(), DataContext.ToString());
//#endif
// Visuals first to grab any control.
var descendantsOnce = _contentPresenter.GetVisualDescendants().ToList();
_pauseAndResumeChild = descendantsOnce.OfType <ISupportPauseResume>().FirstOrDefault();
//_advancedWaitingElement = descendantsOnce.OfType<ISendLoadComplete>().FirstOrDefault();
_dataStatusElement = descendantsOnce.OfType <ISendLoadStatus>().FirstOrDefault();
// If the bindings never get applied due to visibility converters.
//var uie = _advancedWaitingElement as UIElement;
var uie = _dataStatusElement as UIElement;
if (uie != null && uie.Visibility == Visibility.Collapsed)
{
_dataStatusElement = null;
//_advancedWaitingElement = null;
}
if (_dataStatusElement /*_advancedWaitingElement */ == null)
{
// Pause and resume is not support for these two.
var fe =
descendantsOnce.OfType <ItemsControl>().Where(it => it.ItemsSource is ISendLoadStatus).
FirstOrDefault();
if (fe != null)
{
_dataStatusElement = (ISendLoadStatus)fe.ItemsSource;
//_advancedWaitingElement = (ISendLoadComplete) fe.ItemsSource;
}
if (_dataStatusElement /*_advancedWaitingElement */ == null)
{
var de =
descendantsOnce.OfType <FrameworkElement>().Where(ff => ff.DataContext is ISendLoadStatus)
.FirstOrDefault();
if (de != null)
{
_dataStatusElement = de.DataContext as ISendLoadStatus;
// _advancedWaitingElement = de.DataContext as ISendLoadComplete;
}
}
}
if (_dataStatusElement /*_advancedWaitingElement */ != null)
{
#if DEBUG_LOADING_PIVOT_ITEM
Debug.WriteLine("LPI: Custom item base {0} supports load notifications. Excellent.", _dataStatusElement.GetType().ToString());
#endif
// if (_advancedWaitingElement.IsLoadComplete)
if (_dataStatusElement.LoadStatus == LoadStatus.Loaded || _dataStatusElement.LoadStatus == LoadStatus.Failed)
{
OnceSpecializedContentIsReady();
}
else
{
_dataStatusElement.LoadStatusChanged += OnAdvancedWaitingElementLoadComplete;
//_advancedWaitingElement.LoadComplete += OnAdvancedWaitingElementLoadComplete;
//return;
}
// don't let it appear by accident...
return;
}
Debug.Assert(!_contentPresenterUnloaded);
DelayedDispatcherTimer.BeginInvoke(AdditionalLoadTime, FinallyShowContent);
}