/source/library/AdornedPasteUp/PanelPerTypeView.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.Text;

using System.Windows.Forms;



using Interlace.Binding.Views;



#endregion



namespace Interlace.AdornedPasteUp

{

    public class PanelPerTypeView : BinderViewBase

    {

        Control _currentPanel;

        Dictionary<Type, Control> _panels;

        Control _nullPanel;

        object _lastValue;



        public PanelPerTypeView()

        {

            _panels = new Dictionary<Type, Control>();

        }



        public void AddPanel(Type panelForType, Control panel)

        {

            _panels[panelForType] = panel;



            OnModelChanged(_lastValue);

        }



        public Control NullPanel

        { 	 

            get { return _nullPanel; }

            set 

            { 

                _nullPanel = value;



                OnModelChanged(_lastValue);

            }

        }



        protected override void OnModelChanged(object value)

        {

            _lastValue = value;



            Type modelType = null;



            if (value != null)

            {

                modelType = value.GetType();

            }



            Control newPanel;



            if (modelType == null || !_panels.TryGetValue(modelType, out newPanel))

            {

                newPanel = _nullPanel;

            }



            if (newPanel == _currentPanel) return;



            if (newPanel != null)

            {

                newPanel.BringToFront();

                newPanel.Show();

            }



            if (_currentPanel != null)

            {

                _currentPanel.Hide();

            }



            _currentPanel = newPanel;

        }

    }

}