/source/library/Interlace.DevExpress/Binding/Views/CheckedListBoxItemBinderView.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 

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// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 

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// DAMAGE.



using System;

using System.Collections.Generic;

using System.Text;

using System.Windows.Forms;

using DevExpress.XtraEditors;

using DevExpress.XtraEditors.Controls;



#endregion



namespace Interlace.Binding.Views

{

    public class BaseCheckedListBoxControlBinderView : BinderViewBase

    {

        BaseCheckedListBoxControl _boundControl;

        int _itemIndex;



        bool _ignoreChangedEvent;



        public BaseCheckedListBoxControlBinderView(BaseCheckedListBoxControl boundControl, int itemIndex)

        {

            _boundControl = boundControl;

            _itemIndex = itemIndex;



            _boundControl.ItemCheck += new DevExpress.XtraEditors.Controls.ItemCheckEventHandler(_boundControl_ItemCheck);

        }



        void _boundControl_ItemCheck(object sender, DevExpress.XtraEditors.Controls.ItemCheckEventArgs e)

        {

            if (_ignoreChangedEvent) return;



            ChangeModel(_boundControl.Items[_itemIndex].CheckState == CheckState.Checked);

        }



        public override int OrderingIndex

        {

            get { return _boundControl.TabIndex; }

        }



        private void SetEditValueAndIgnoreEvents(CheckState value)

        {

            try

            {

                _ignoreChangedEvent = true;



                _boundControl.Items[_itemIndex].CheckState = value;

            }

            finally

            {

                _ignoreChangedEvent = false;

            }

        }



        protected override void OnModelChanged(object value)

        {

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

            {

                SetEditValueAndIgnoreEvents(CheckState.Indeterminate);

                _boundControl.Items[_itemIndex].Enabled = false;

            }

            else

            {

                SetEditValueAndIgnoreEvents((bool)value ? CheckState.Checked : CheckState.Unchecked);

                _boundControl.Items[_itemIndex].Enabled = true;

            }

        }



        protected override void HighlightError()

        {

        }

    }

}