private void OnceSpecializedContentIsReady()
{
Debug.WriteLine("OnceSpecializedContentIsReady!");
if (_dataStatusElement != null && _dataStatusElement.LoadStatus == LoadStatus.Failed)
{
Debug.WriteLine("FAILED that is...");
LoadingText = "FAILED!!!!!!";
bool mayHaveHadDataAlready = false;
ISendLoadComplete islc = _dataStatusElement as ISendLoadComplete;
if (islc != null)
{
if (islc.IsLoadComplete)
{
mayHaveHadDataAlready = true;
// There "was" data and now there's been an error...
}
}
if (!mayHaveHadDataAlready)
{
RestoreLoadingGrid();
}
// NOTE: Never will call FinallyShowContent.
return;
}
DelayedDispatcherTimer.BeginInvoke(AdditionalLoadTime, FinallyShowContent);
}
// 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();
// If the bindings never get applied due to visibility converters.
var uie = _advancedWaitingElement as UIElement;
if (uie != null && uie.Visibility == Visibility.Collapsed)
{
_advancedWaitingElement = null;
}
if (_advancedWaitingElement == null)
{
// Pause and resume is not support for these two.
var fe =
descendantsOnce.OfType <ItemsControl>().Where(it => it.ItemsSource is ISendLoadComplete).
FirstOrDefault();
if (fe != null)
{
_advancedWaitingElement = (ISendLoadComplete)fe.ItemsSource;
}
if (_advancedWaitingElement == null)
{
var de =
descendantsOnce.OfType <FrameworkElement>().Where(ff => ff.DataContext is ISendLoadComplete)
.FirstOrDefault();
if (de != null)
{
_advancedWaitingElement = de.DataContext as ISendLoadComplete;
}
}
}
if (_advancedWaitingElement != null)
{
#if DEBUG_LOADING_PIVOT_ITEM
Debug.WriteLine("LPI: Custom item base {0} supports load notifications. Excellent.", _advancedWaitingElement.GetType().ToString());
#endif
if (_advancedWaitingElement.IsLoadComplete)
{
OnceSpecializedContentIsReady();
}
else
{
_advancedWaitingElement.LoadComplete += OnAdvancedWaitingElementLoadComplete;
}
return;
}
Debug.Assert(!_contentPresenterUnloaded);
DelayedDispatcherTimer.BeginInvoke(AdditionalLoadTime, FinallyShowContent);
}
// 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();
// If the bindings never get applied due to visibility converters.
var uie = _advancedWaitingElement as UIElement;
if (uie != null && uie.Visibility == Visibility.Collapsed)
{
_advancedWaitingElement = null;
}
if (_advancedWaitingElement == null)
{
// Pause and resume is not support for these two.
var fe =
descendantsOnce.OfType<ItemsControl>().Where(it => it.ItemsSource is ISendLoadComplete).
FirstOrDefault();
if (fe != null)
{
_advancedWaitingElement = (ISendLoadComplete)fe.ItemsSource;
}
if (_advancedWaitingElement == null)
{
var de =
descendantsOnce.OfType<FrameworkElement>().Where(ff => ff.DataContext is ISendLoadComplete)
.FirstOrDefault();
if (de != null)
{
_advancedWaitingElement = de.DataContext as ISendLoadComplete;
}
}
}
if (_advancedWaitingElement != null)
{
#if DEBUG_LOADING_PIVOT_ITEM
Debug.WriteLine("LPI: Custom item base {0} supports load notifications. Excellent.", _advancedWaitingElement.GetType().ToString());
#endif
if (_advancedWaitingElement.IsLoadComplete)
OnceSpecializedContentIsReady();
else
_advancedWaitingElement.LoadComplete += OnAdvancedWaitingElementLoadComplete;
return;
}
Debug.Assert(!_contentPresenterUnloaded);
DelayedDispatcherTimer.BeginInvoke(AdditionalLoadTime, FinallyShowContent);
}