Nov 3, 2014

How do you do transition effects using the Frame control in WPF?

xaml:
...
<Frame Name = "frame" Navigating="frame_Navigating">
...
code:
...
private bool                        _allowDirectNavigation = false;
private NavigatingCancelEventArgs   _navArgs = null;
private Duration                    _duration = new Duration(TimeSpan.FromSeconds(1));
private double                      _oldHeight = 0;

private void frame_Navigating(object sender, NavigatingCancelEventArgs e)
{
    if (Content!=null && !_allowDirectNavigation)
    {
        e.Cancel = true;

        _navArgs = e;
        _oldHeight = frame.ActualHeight;

        DoubleAnimation animation0 = new DoubleAnimation();
        animation0.From = frame.ActualHeight;
        animation0.To = 0;
        animation0.Duration = _duration;
        animation0.Completed += SlideCompleted;
        frame.BeginAnimation(HeightProperty, animation0);
    }
    _allowDirectNavigation = false;
}

private void SlideCompleted(object sender, EventArgs e)
{
    _allowDirectNavigation = true;
    switch (_navArgs.NavigationMode)
    {
        case NavigationMode.New:
            if (_navArgs.Uri == null)
                frame.Navigate(_navArgs.Content);
            else
                frame.Navigate(_navArgs.Uri);
            break;
        case NavigationMode.Back:
            frame.GoBack();
            break;
        case NavigationMode.Forward:
            frame.GoForward();
            break;
        case NavigationMode.Refresh:
            frame.Refresh();
            break;
    }

    Dispatcher.BeginInvoke(DispatcherPriority.Loaded,
        (ThreadStart)delegate()
        {
            DoubleAnimation animation0 = new DoubleAnimation();
            animation0.From = 0;
            animation0.To = _oldHeight;
            animation0.Duration = _duration;
            frame.BeginAnimation(HeightProperty, animation0);
        });
}
...
hope this helps, regards

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