DataPagerFieldCollection.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » WebControls » C# / CSharp Open Source

//
// System.Web.UI.WebControls.DataPagerFieldCollection
//
// Authors:
//   Marek Habersack (mhabersack@novell.com)
//
// (C) 2007-2008 Novell, Inc
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_3_5
using System;
using System.Collections;
using System.ComponentModel;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;

namespace System.Web.UI.WebControls{
  [AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  public class DataPagerFieldCollection : StateManagedCollection
  {
    enum KnownTypeIndexes
    {
      NextPreviousPagerField = 0,
      NumericPagerField = 1,
      TemplatePagerField = 2
    }
    
    static readonly Type[] knownTypes = {
      typeof (NextPreviousPagerField),
      typeof (NumericPagerField),
      typeof (TemplatePagerField)
    };

    static readonly object FieldsChangedEvent = new object ();
    
    IList list;
    DataPager owner;
    EventHandlerList events;

    public event EventHandler FieldsChanged {
      add { AddEventHandler (FieldsChangedEvent, value); }
      remove { RemoveEventHandler (FieldsChangedEvent, value); }
    }
    
    public DataPagerFieldCollection (DataPager dataPager)
    {
      list = (IList)this;
      owner = dataPager;
    }

    public void Add (DataPagerField field)
    {
      list.Add (field);
    }

    public DataPagerFieldCollection CloneFields (DataPager pager)
    {
      throw new NotImplementedException ();
    }

    public bool Contains (DataPagerField field)
    {
      return list.Contains (field);
    }

    public void CopyTo (DataPagerField[] array, int index)
    {
    }

    protected override object CreateKnownType (int index)
    {
      if (!Enum.IsDefined (typeof (KnownTypeIndexes), index))
        throw new ArgumentOutOfRangeException ("index");

      return Activator.CreateInstance (knownTypes [index]);
    }
    
    protected override Type[] GetKnownTypes ()
    {
      return knownTypes;
    }

    public int IndexOf (DataPagerField field)
    {
      return list.IndexOf (field);
    }

    public void Insert (int index, DataPagerField field)
    {
      list.Insert (index, field);
    }

    protected override void OnClearComplete ()
    {
      base.OnClearComplete ();
      InvokeEvent (FieldsChangedEvent, EventArgs.Empty);
    }

    protected override void OnInsertComplete (int index, object value)
    {
      base.OnInsertComplete (index, value);
      DataPagerField field = value as DataPagerField;
      if (field == null)
        return;
      
      field.SetDataPager (owner);
      field.FieldChanged += new EventHandler (FieldHasChanged);
      InvokeEvent (FieldsChangedEvent, EventArgs.Empty);
    }

    protected override void OnRemoveComplete (int index, object value)
    {
      base.OnRemoveComplete (index, value);
      DataPagerField field = value as DataPagerField;
      if (field == null)
        return;

      field.SetDataPager (null);
      field.FieldChanged -= new EventHandler (FieldHasChanged);
      InvokeEvent (FieldsChangedEvent, EventArgs.Empty);
    }

    protected override void OnValidate (object o)
    {
      base.OnValidate (o);
      DataPagerField field = o as DataPagerField;
      if (field == null)
        throw new ArgumentException ("is not an instance of the DataPagerField class or of one of its derived classes.", "o");
    }

    public void Remove (DataPagerField field)
    {
      list.Remove (field);
    }

    public void RemoveAt (int index)
    {
      list.RemoveAt (index);
    }

    protected override void SetDirtyObject (object o)
    {
    }

    [BrowsableAttribute(false)]
    public DataPagerField this [int index] {
      get { return list [index] as DataPagerField; }
    }

    void FieldHasChanged (object sender, EventArgs args)
    {
      InvokeEvent (FieldsChangedEvent, EventArgs.Empty);
    }

    void AddEventHandler (object key, EventHandler handler)
    {
      if (events == null)
        events = new EventHandlerList ();
      events.AddHandler (key, handler);
    }

    void RemoveEventHandler (object key, EventHandler handler)
    {
      if (events == null)
        return;
      events.RemoveHandler (key, handler);
    }

    void InvokeEvent (object key, EventArgs args)
    {
      if (events == null)
        return;

      EventHandler eh = events [key] as EventHandler;
      if (eh == null)
        return;
      eh (this, args);
    }
  }
}
#endif