private void ClosePickerPage()
{
// Unhook from events
if (null != _frame)
{
_frame.Navigated -= OnFrameNavigated;
_frame.NavigationStopped -= OnFrameNavigationStoppedOrFailed;
_frame.NavigationFailed -= OnFrameNavigationStoppedOrFailed;
// Restore host page transitions for the completed "popup" navigation
var frameContentWhenOpenedAsUiElement = _frameContentWhenOpened as UIElement;
if (null != frameContentWhenOpenedAsUiElement)
{
TransitionService.SetNavigationInTransition(frameContentWhenOpenedAsUiElement, _savedNavigationInTransition);
_savedNavigationInTransition = null;
TransitionService.SetNavigationOutTransition(frameContentWhenOpenedAsUiElement, _savedNavigationOutTransition);
_savedNavigationOutTransition = null;
}
_frame = null;
_frameContentWhenOpened = null;
}
// Commit the value if available
if (null != _valuePickerPage)
{
if (_valuePickerPage.Value.HasValue)
{
Value = _valuePickerPage.Value.Value;
}
_valuePickerPage = null;
}
}
private void OnFrameNavigated(object sender, NavigationEventArgs e)
{
if (e.Content == _frameContentWhenOpened)
{
// Navigation to original page; close the picker page
ClosePickerPage();
}
else if (null == _valuePickerPage)
{
// Navigation to a new page; capture it and push the value in
_valuePickerPage = e.Content as IValuePickerPage <T>;
if (null != _valuePickerPage)
{
NavigateToNewPage(e.Content);
}
}
}
