CSharp

Development Platform:
C#

RadItemOwnerCollection.cs：Code Content
							using System;
using System.Collections.Generic;
using System.Drawing.Design;
using System.Text;
using System.Collections;
namespace Telerik.WinControls
{
    /// <summary>
	///     <para>
    ///       A collection that stores <see cref='Telerik.WinControls.RadItem'/> objects.
	///    </para>
	/// </summary>
	/// <seealso cref='RadItemCollection'/>
    public class RadItemOwnerCollection : RadItemCollection
	{
        private RadElement owner;
		/// <summary>
		///     <para>
		///       Initializes a new instance of <see cref='RadItemCollection'/>.
		///    </para>
		/// </summary>
		public RadItemOwnerCollection(RadElement owner)
		{
			this.owner = owner;
		}
        /// <summary>Initializes a new instance of the RadItemCollection class.</summary>
        public RadItemOwnerCollection()
        {
        }
		/// <summary>
		///     <para>
		///       Initializes a new instance of <see cref='Telerik.WinControls.RadItemCollection'/> based on another <see cref='Telerik.WinControls.RadItemCollection'/>.
		///    </para>
		/// </summary>
		/// <param name='value'>
		///       A <see cref='Telerik.WinControls.RadItemCollection'/> from which the contents are copied
		/// </param>
		public RadItemOwnerCollection(RadItemOwnerCollection value) : base(value)
		{	
		}
		/// <summary>
		///     <para>
        ///       Initializes a new instance of <see cref='Telerik.WinControls.RadItemCollection'/> containing any array of <see cref='Telerik.WinControls.RadItem'/> objects.
		///    </para>
		/// </summary>
		/// <param name='value'>
        ///       A array of <see cref='Telerik.WinControls.RadItem'/> objects with which to intialize the collection
		/// </param>
		public RadItemOwnerCollection(RadItem[] value) : base(value)
		{
		}
		/// <summary>
        /// Gets or sets the owner of the collection.
        /// </summary>
        public RadElement Owner
        {
            get
            { 
                return owner;
            }
            set
            {
				if (this.owner == value)
				{
					return;
				}
				if (this.owner != null)
                {
					this.RemoveAllFromOwner();
                }
                this.owner = value;
                if (this.owner != null)
                {
                    this.SynchronizeAllWithOwner();
                }				
            }
        }
  
        private void SynchronizeAllWithOwner()
        {
            if (!this.Owner.UseNewLayoutSystem)
			    this.Owner.SuspendLayout();
            foreach (RadItem element in this)
            {
                if (!this.Owner.Children.Contains(element))
                {
                    this.Owner.Children.Add(element);
                }
            }
            if (!this.Owner.UseNewLayoutSystem)
			    this.Owner.ResumeLayout(true);
        }
        private void RemoveAllFromOwner()
        {
            if (!this.Owner.UseNewLayoutSystem)
			    this.Owner.SuspendLayout();
            foreach (RadItem element in this)
            {
				int index = this.Owner.Children.IndexOf(element);
				if (index >= 0 )
					this.Owner.Children.RemoveAt(index);
            }
            if (!this.Owner.UseNewLayoutSystem)
			    this.Owner.ResumeLayout(true);
        }
        protected override void OnSetComplete(int index, object oldValue, object newValue)
        {
            if (this.Owner != null)
            {
                int childIndex = this.owner.Children.IndexOf((RadItem)oldValue);
                if (childIndex >= 0)
                {
                    this.owner.Children[childIndex] = (RadItem)newValue;
                }
                else
                {
                    this.owner.Children.Add((RadItem)newValue);
                }
            }
            base.OnSetComplete(index, oldValue, newValue);
        }
        protected override void OnClear()
        {
            base.OnClear();
            //Clear all the corresponding items from the children collection
            if (this.Owner != null)
            {
                this.RemoveAllFromOwner();
            }            
        }
		protected override void OnInsertComplete(int index, object value)
		{
            if (this.Owner != null)
            {
				int newIndex= index;
				if (newIndex > this.Owner.Children.Count)
					newIndex = this.Owner.Children.Count;
                this.Owner.Children.Insert(newIndex, (RadItem)value);
            }
            base.OnInsertComplete(index, value);
		}
		protected override void OnRemoveComplete(int index, object value)
		{
            if (this.Owner != null)
            {
                this.Owner.Children.Remove((RadItem)value);
            }
            base.OnRemoveComplete(index, value);
		}
        protected override void OnSortComplete()
        {
            if (this.Owner != null)
                this.owner.ChangeCollection(null, ItemsChangeOperation.Sorted);
            base.OnSortComplete();
        }
	}	
}

						