/source/library/Interlace.DevExpress/Binding/Views/VisibleView.cs

#region Using Directives and Copyright Notice



// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * 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.

//     * Neither the name of the Computer Consultancy Pty Ltd nor the

//       names of its contributors may be used to endorse or promote products

//       derived from this software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COMPUTER CONSULTANCY PTY LTD 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.



using System;

using System.Collections.Generic;

using System.Reflection;

using System.Text;

using System.Windows.Forms;



using DevExpress.XtraBars;



#endregion



namespace Interlace.Binding.Views

{

    public class VisibleView : BinderViewBase

    {

        delegate void VisibleSetDelegate(bool visible);



        VisibleSetDelegate _setDelegate;

        bool _unboundValue = false;



        public VisibleView(params Control[] boundControls)

        {

            ViewToModelDisabled = true;



            // Take a private copy:

            Control[] boundControlsCopy = new Control[boundControls.Length];

            Array.Copy(boundControls, boundControlsCopy, boundControlsCopy.Length);



            _setDelegate = delegate(bool visible)

            {

                foreach (Control control in boundControlsCopy)

                {

                    control.Visible = visible;

                }

            };

        }



        public static VisibleView FromReflection<T>(params T[] objects)

        {

            // Take a private copy:

            T[] objectsCopy = new T[objects.Length];

            Array.Copy(objects, objectsCopy, objects.Length);



            Type objectType = typeof(T);

            PropertyInfo property = objectType.GetProperty("Visible");



            return new VisibleView(delegate(bool visible)

            {

                foreach (T item in objectsCopy)

                {

                    property.SetValue(item, visible, null);

                }

            });

        }



        VisibleView(VisibleSetDelegate setDelegate)

        {

            ViewToModelDisabled = true;



            _setDelegate = setDelegate;

        }



        protected override void OnModelChanged(object value)

        {

            bool valueToSet;



            if (value == BinderNotBound.Value || value == BinderMissingProperty.Value)

            {

                valueToSet = _unboundValue;

            }

            else if (value is bool)

            {

                valueToSet = (bool)value;

            }

            else

            {

                valueToSet = value != null;

            }



            _setDelegate(valueToSet);

        }

    }

}