private void HandleFrameNavigated(object sender, NavigationEventArgs e)
{
if (e.Content == _frameContentWhenOpened)
{
// Navigation to original page; close the picker page
ListPickerMode = ListPickerMode.Normal;
}
else if (null == _listPickerPage && _hasPickerPageOpen)
{
_hasPickerPageOpen = false;
_listPickerPage = e.Content as ListPickerPage;
if (null != _listPickerPage)
{
// Set up the list picker page with the necesarry fields.
if (null != FullModeHeader)
{
_listPickerPage.HeaderText = (string)FullModeHeader;
}
else
{
_listPickerPage.HeaderText = (string) Header;
}
_listPickerPage.FullModeItemTemplate = FullModeItemTemplate;
_listPickerPage.Items.Clear();
if (null != Items)
{
foreach (var element in Items)
{
_listPickerPage.Items.Add(element);
}
}
_listPickerPage.SelectionMode = SelectionMode;
if (SelectionMode == SelectionMode.Single)
{
_listPickerPage.SelectedItem = SelectedItem;
}
else
{
_listPickerPage.SelectedItems.Clear();
if (null != SelectedItems)
{
foreach (var element in SelectedItems)
{
_listPickerPage.SelectedItems.Add(element);
}
}
}
}
}
}
private void ClosePickerPage()
{
// Unhook from events
if (null != _frame)
{
_frame.Navigated -= new NavigatedEventHandler(HandleFrameNavigated);
_frame.NavigationStopped -= new NavigationStoppedEventHandler(HandleFrameNavigationStoppedOrFailed);
_frame.NavigationFailed -= new NavigationFailedEventHandler(HandleFrameNavigationStoppedOrFailed);
// Restore host page transitions for the completed "popup" navigation
UIElement 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 != _listPickerPage)
{
if (SelectionMode == SelectionMode.Single && null != _listPickerPage.SelectedItem)
{
SelectedItem = _listPickerPage.SelectedItem;
}
else if ((SelectionMode == SelectionMode.Multiple || SelectionMode == SelectionMode.Extended) && null != _listPickerPage.SelectedItems)
{
SelectedItems = _listPickerPage.SelectedItems;
}
_listPickerPage = null;
}
}
