/// <summary>
/// Does actual navigation - adds journal entry if necessary, etc.
/// </summary>
/// <param name="e">Details of the navigation event.</param>
private void DoNavigation(ViewManagerNavigatedEventArgs e)
{
DateTime newTimeOfNavigation = DateTime.UtcNow;
TimeSpan timeSinceLastNavigation = newTimeOfNavigation - _lastNavigation;
if (_contentStateToSave != null && this.IsNewNavigation(e.NavigationMode))
{
NavigationService navigationService = NavigationService.GetNavigationService(this);
if (navigationService != null)
{
CustomContentState contentStateToSave = _contentStateToSave;
_contentStateToSave = null;
if (timeSinceLastNavigation > TimeSpan.FromSeconds(3) || !e.NewNavigator.ShouldReplaceNavigatorInJournal(e.OldNavigator))
{
navigationService.AddBackEntry(contentStateToSave);
}
}
}
if (e.ContentStateToSave != null)
{
_contentStateToSave = e.ContentStateToSave;
}
Content = e.Content;
_lastNavigation = newTimeOfNavigation;
}
private void cmdRemove_Click(object sender, RoutedEventArgs e)
{
if (lstTarget.SelectedIndex != -1)
{
// Determine the best name to use in the navigation history.
NavigationService nav = NavigationService.GetNavigationService(this);
string itemText = lstTarget.SelectedItem.ToString();
string journalName = "Removed " + itemText;
// Update the journal (using the method shown below.)
nav.AddBackEntry(GetJournalEntry(journalName));
// Perform the change.
lstSource.Items.Add(itemText);
lstTarget.Items.Remove(itemText);
}
}