#region /* ----------------------------------------------------------------------- * * * Copyright 2011-2012 GRNET S.A. All rights reserved. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * 1. Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * The views and conclusions contained in the software and * documentation are those of the authors and should not be * interpreted as representing official policies, either expressed * or implied, of GRNET S.A. * * ----------------------------------------------------------------------- */ #endregion using System; using System.Globalization; using System.Windows; using System.Windows.Data; namespace Pithos.Client.WPF.Converters { /// /// Returns Visible if the value is not null, Collapsed otherwise /// public class NullToVisibilityConverter:IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { bool invert = (parameter != null); if (value==null) return invert?Visibility.Visible:Visibility.Collapsed; return invert?Visibility.Collapsed:Visibility.Visible; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } }