ListBox.cs :  » 2.6.4-mono-.net-core » System.Windows.Forms » System » Windows » Forms » C# / CSharp Open Source

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C# / CSharp Open Source » 2.6.4 mono .net core » System.Windows.Forms 
System.Windows.Forms » System » Windows » Forms » ListBox.cs
//
// System.Windows.Forms.ListBox.cs
//
// Author:
//   stubbed out by Daniel Carrera (dcarrera@math.toronto.edu)
//   Dennis Hayes (dennish@Raytek.com)
//   Alexandre Pigolkine (pigolkine@gmx.de)
//
// (C) 2002/3 Ximian, 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.
//
using System.Collections;
using System.Drawing;
using System.Runtime.InteropServices;

namespace System.Windows.Forms{

  // <summary>
  // </summary>

  public class ListBox : ListControl {

    //
    //  --- Constructor
    //
    [MonoTODO]
    public ListBox() {
      SubClassWndProc_ = true;
      BorderStyle_ = BorderStyle.Fixed3D;
      BackColor = SystemColors.Window;
      controlStyles_ |= ControlStyles.AllPaintingInWmPaint; 
    }

    //
    //   --- Protected Fields
    //
    internal int ColumnWidth_ = 0; // The columns will have default width
    internal bool IntegralHeight_ = true;
    internal ListBox.ObjectCollection  Items_ = null;
    internal ListBox.SelectedIndexCollection SelectedIndices_ = null;
    internal ListBox.SelectedObjectCollection SelectedObjects_ = null;
    internal DrawMode DrawMode_ = DrawMode.Normal;
    internal bool UseTabStops_ = false;
    internal bool MultiColumn_ = false;
    int selectedIndex = -1;
    internal bool Sorted_ = false;
    internal int prevSelectedIndex = -1;
    internal BorderStyle  BorderStyle_;
    
    //
    //   --- Public Fields
    //
    public const int DefaultItemHeight = 13;//correct
    public const int NoMatches = -1 ;//correct
    

    //
    //  --- Public Properties
    //
    [MonoTODO]
    public override Color ForeColor {
      get {
        //FIXME:
        return base.ForeColor;
      }
      set {
        //FIXME:
        base.ForeColor = value;
      }
    }

    [MonoTODO]
    public override Color BackColor {
      get {
        //FIXME:
        return base.BackColor;
      }
      set {
        //FIXME:
        base.BackColor = value;
      }
    }
    [MonoTODO]
    public override Image BackgroundImage {
      get {
        //FIXME:
        return base.BackgroundImage;
      }
      set {
        //FIXME:
        base.BackgroundImage = value;
      }
    }

    public BorderStyle BorderStyle {
      get {
        return BorderStyle_;        
      }
      set {
        if( BorderStyle_ != value) {
          BorderStyle_ = value;
          if( IsHandleCreated) {
            
          }
        }
      }
    }

    [MonoTODO]
    public int HorizontalExtent {
      get {
        throw new NotImplementedException ();
      }
      set {
        //Fixme
      }
    }
    public bool MultiColumn {
      get {
        return MultiColumn_;
      }
      set {
        if( MultiColumn_ != value) {
          MultiColumn_ = value;
          RecreateHandle();
        }
      }
    }

    [MonoTODO]
    public override RightToLeft RightToLeft {
      get {
        //FIXME:
        return base.RightToLeft;
      }
      set {
        //FIXME:
        base.RightToLeft = value;
      }
    }
    [MonoTODO]
    public bool ScrollAlwaysVisible {
      get {
        throw new NotImplementedException ();
      }
      set {
        //FIXME:
      }
    }

    [MonoTODO]
    public bool HorizontalScrollbar {
      get {
        throw new NotImplementedException ();
      }
      set {
        // FIXME
      }
    }

    [MonoTODO]
    public int PreferredHeight {
      get {
        throw new NotImplementedException ();
      }
    }
    
    [MonoTODO]
    public override int SelectedIndex {
      get {
        if( IsHandleCreated) {
          return Win32.SendMessage(Handle, (int)ListBoxMessages.LB_GETCURSEL, 0, 0);
        }
        else {
          return selectedIndex;
        }
      }
      set {
        prevSelectedIndex = selectedIndex;
        if( selectedIndex != value) {
          //FIXME: set exception parameters
          selectedIndex = value;
          if( IsHandleCreated) {
            Win32.SendMessage(Handle, (int)ListBoxMessages.LB_SETCURSEL, selectedIndex, 0);
          }
          OnSelectedIndexChanged(new EventArgs());
        }
      }
    }
    
    [MonoTODO]
    public ListBox.SelectedIndexCollection SelectedIndices {
      get {
        if( SelectedIndices_ == null) {
          SelectedIndices_ = new ListBox.SelectedIndexCollection(this);
        }
        return SelectedIndices_;
      }
    }
    [MonoTODO]
    public object SelectedItem {
      get {
        throw new NotImplementedException ();
      }
      set {
        //FIXME:
      }
    }
    [MonoTODO]
    public ListBox.SelectedObjectCollection SelectedItems {
      get {
        if( SelectedObjects_ == null) {
          SelectedObjects_ = new ListBox.SelectedObjectCollection(this);
        }
        return SelectedObjects_;
      }
    }
    [MonoTODO]
    public virtual SelectionMode SelectionMode {
      get {
        throw new NotImplementedException ();
      }
      set {
        //FIXME:
      }
    }
    [MonoTODO]
    public bool Sorted {
      get {
        return Sorted_;
      }
      set {
        if( Sorted_ != value){
          Sorted_ = value;
          if( Sorted_) {
            Items_.SwitchToSortedStyle();
/*            
            object[] items = new object[Items.Count];
            Items.CopyTo(items, 0);
            Items.Clear();
            Items.AddRange(items);
*/
          }
        }
      }
    }
    [MonoTODO]
    public override string Text {
      get {
        return base.Text;
      }
      set {
        base.Text = value;
      }
    }
    [MonoTODO]
    public int TopIndex {
      get {
        throw new NotImplementedException ();
      }
      set {
        //FIXME:
      }
    }
    [MonoTODO]
    public bool UseTabStops {
      get {
        return UseTabStops_;
      }
      set {
        UseTabStops_ = value;
      }
    }

    [MonoTODO]
    public virtual DrawMode DrawMode {
      get {
        return DrawMode_;
      }
      set {
        DrawMode_ = value;
        // FIXME: change styles of Windows control/ recreate control
      }
    }

    public int ColumnWidth {
      get {
        return ColumnWidth_;
      }
      set {
        ColumnWidth_ = value;
      }
    }
    
    [MonoTODO]
    public virtual int ItemHeight {
      get {
        throw new NotImplementedException ();
      }
      set {
        //FIXME:
      }
    }
    public bool IntegralHeight {
      get {
        return IntegralHeight_;
      }
      set {
        IntegralHeight_ = value;
      }
    }
    
    public ListBox.ObjectCollection Items {
      get {
        if( Items_ == null) {
          Items_ = CreateItemCollection();
        }
        return Items_;
      }
    }
    
    internal virtual void OnObjectCollectionChanged() {
      SelectedIndices_ = null;
    }
    
    //
    //  --- Public Methods
    //
    [MonoTODO]
    public void BeginUpdate() {
      //FIXME:
    }
    [MonoTODO]
    public void ClearSelected() {
      //FIXME:
    }
    [MonoTODO]
    public void EndUpdate() {
      //FIXME:
    }
    [MonoTODO]
    public int FindString(string s) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public int FindString(string s, int startIndex) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public int FindStringExact(string s) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public int FindStringExact(string s, int startIndex) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public int GetItemHeight(int index) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public Rectangle GetItemRectangle(int index) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public bool GetSelected(int index) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public int IndexFromPoint(Point p) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public int IndexFromPoint(int x, int y) {
      throw new NotImplementedException ();
    }
    [MonoTODO]
    public void SetSelected(int index, bool value) {
      //FIXME:
    }
    [MonoTODO]
    public override string ToString() {
      //FIXME:
      return base.ToString();
    }

    //
    //  --- Public Events
    //
    [MonoTODO]
    public event DrawItemEventHandler DrawItem;
    [MonoTODO]
    public event MeasureItemEventHandler MeasureItem;
    public event EventHandler SelectedIndexChanged;
    //
    //  --- Protected Properties
    //
    [MonoTODO]
    protected override CreateParams CreateParams {
      get {
          CreateParams createParams = base.CreateParams;
          createParams.ClassName = "LISTBOX";
          createParams.ExStyle = (int)WindowExStyles.WS_EX_CLIENTEDGE;
          createParams.Style = (int) (
            WindowStyles.WS_CHILD | 
            WindowStyles.WS_VISIBLE |
            WindowStyles.WS_CLIPSIBLINGS);
          createParams.Style |= (int) (ListBoxStyles.LBS_NOTIFY | 
            ListBoxStyles.LBS_HASSTRINGS );
          if( !IntegralHeight_) {
            createParams.Style |= (int)ListBoxStyles.LBS_NOINTEGRALHEIGHT;
          }
          if( UseTabStops_ ) {
            createParams.Style |= (int)ListBoxStyles.LBS_USETABSTOPS;
          }
          switch( DrawMode_){
            case DrawMode.OwnerDrawFixed:
              createParams.Style |= (int)ListBoxStyles.LBS_OWNERDRAWFIXED;
              break;
            case DrawMode.OwnerDrawVariable:
              createParams.Style |= (int)ListBoxStyles.LBS_OWNERDRAWVARIABLE;
              break;
          }
          if( MultiColumn_) {
            createParams.Style |= (int)ListBoxStyles.LBS_MULTICOLUMN | (int)WindowStyles.WS_HSCROLL;
          }
          else {
            createParams.Style |= (int)WindowStyles.WS_VSCROLL;
          }
          return createParams;
      }    
    }

    [MonoTODO]
    protected override Size DefaultSize {
      get {
        return new Size(120,95);
      }
    }

    //
    //  --- Protected Methods
    //

    [MonoTODO]
    protected virtual void AddItemsCore(object [] value) {
      //Fixme
    }

    [MonoTODO]
    protected virtual ObjectCollection CreateItemCollection() {
      return new ListBox.ObjectCollection( this);
    }

    [MonoTODO]
    protected override void OnChangeUICues(UICuesEventArgs e) {
      //FIXME:
      base.OnChangeUICues(e);
    }
    [MonoTODO]
    protected override void OnDataSourceChanged(EventArgs e) {
      //FIXME:
      base.OnDataSourceChanged(e);
    }
    [MonoTODO]
    protected override void OnDisplayMemberChanged(EventArgs e) {
      //FIXME:
      base.OnDisplayMemberChanged(e);
    }

    [MonoTODO]
    protected virtual void OnDrawItem(DrawItemEventArgs e) {
      if( DrawItem != null) {
        DrawItem(this, e);
      }
    }

    [MonoTODO]
    protected override void OnFontChanged(EventArgs e) {
      //FIXME:
      base.OnFontChanged(e);
    }
    [MonoTODO]
    protected override void OnHandleCreated(EventArgs e) {
      //FIXME:
      base.OnHandleCreated(e);
      if( Items_ != null) {
        Items_.PopulateControl();
      }
      if( ColumnWidth_ != 0 && MultiColumn_) {
        Win32.SendMessage( Handle, (int)ListBoxMessages.LB_SETCOLUMNWIDTH, ColumnWidth_, 0);
      }
      
    }
    [MonoTODO]
    protected override void OnHandleDestroyed(EventArgs e) {
      //FIXME:
      base.OnHandleDestroyed(e);
    }

    [MonoTODO]
    protected virtual void OnMeasureItem(MeasureItemEventArgs e) {
      if( MeasureItem != null) {
        MeasureItem(this, e);
      }
    }

    [MonoTODO]
    protected override void OnParentChanged(EventArgs e) {
      //FIXME:
      base.OnParentChanged(e);
    }
    [MonoTODO]
    protected override void OnResize(EventArgs e) {
      //FIXME:
      base.OnResize(e);
    }
    [MonoTODO]
    protected override void OnSelectedIndexChanged(EventArgs e) {
      //FIXME:
      base.OnSelectedIndexChanged(e);
      if( SelectedIndexChanged != null) {
        SelectedIndexChanged(this, e);
      }
    }

    [MonoTODO]
    protected override void OnSelectedValueChanged(EventArgs e) {
      //FIXME:
      base.OnSelectedValueChanged(e);
    }

    protected override void RefreshItem(int index) {
      //FIXME:
    }

    public override void Refresh() { // .NET V1.1 Beta
      base.Refresh();
    }
    
    [MonoTODO]
    protected override void SetBoundsCore( int x, int y,  int width, int height,  BoundsSpecified specified) {
      //FIXME:
      base.SetBoundsCore(x, y, width, height, specified);
    }

    [MonoTODO]
    protected override void SetItemCore (int index, object value) {
      //FIXME:
    }

    protected override void SetItemsCore (IList value){
    }

    [MonoTODO]
    protected virtual void Sort() {
      //FIXME:
    }

    protected virtual void WmReflectCommand(ref Message m){
      throw new NotImplementedException ();
    }
    
    [MonoTODO]
    protected override void WndProc(ref Message m) {
      switch ((Msg) m.Msg) {
        case Msg.WM_MEASUREITEM: {
          MEASUREITEMSTRUCT mis = new MEASUREITEMSTRUCT();
          mis = (MEASUREITEMSTRUCT)Marshal.PtrToStructure(m.LParam, mis.GetType());
          MeasureItemEventArgs args = new MeasureItemEventArgs(CreateGraphics(),mis.itemID);
          args.ItemHeight = mis.itemHeight;
          args.ItemWidth = mis.itemWidth;
          OnMeasureItem( args);
          mis.itemHeight = args.ItemHeight;
          mis.itemWidth = args.ItemWidth;
          Marshal.StructureToPtr(mis, m.LParam, false);
          m.Result = (IntPtr)1;
          }
          break;
        case Msg.WM_DRAWITEM: {
          DRAWITEMSTRUCT dis = new DRAWITEMSTRUCT();
          dis = (DRAWITEMSTRUCT)Marshal.PtrToStructure(m.LParam, dis.GetType());
          Rectangle  rect = new Rectangle(dis.rcItem.left, dis.rcItem.top, dis.rcItem.right - dis.rcItem.left, dis.rcItem.bottom - dis.rcItem.top);
          DrawItemEventArgs args = new DrawItemEventArgs(Graphics.FromHdc(dis.hDC), Font,
            rect, dis.itemID, (DrawItemState)dis.itemState);
          OnDrawItem( args);
          //Marshal.StructureToPtr(dis, m.LParam, false);
          m.Result = (IntPtr)1;
          }
          break;
        case Msg.WM_COMMAND: 
          switch(m.HiWordWParam) {
            case (uint)ListBoxNotifications.LBN_SELCHANGE:
              SelectedIndex = Win32.SendMessage(Handle, (int)ListBoxMessages.LB_GETCURSEL, 0, 0);
              m.Result = IntPtr.Zero;
              CallControlWndProc(ref m);
              break;
            default:
              CallControlWndProc(ref m);
              break;
          }
          break;
        default:
          base.WndProc(ref m);
          break;
      }
    }

    //
    // <summary>
    // This is a subclass
    // </summary>

    public class SelectedObjectCollection :  IList, ICollection, IEnumerable {

      ArrayList   collection_;
      ListBox    owner_;
      //
      //  --- Constructor
      //
      [MonoTODO]
      public SelectedObjectCollection(ListBox owner) {
        owner_ = owner;
        collection_ = owner_.Items.CreateSelectedObjectsList();
      }

      //
      //  --- Public Properties
      //
      [MonoTODO]
      public int Count {
        get {
          return collection_.Count;
        }
      }
      [MonoTODO]
      public bool IsReadOnly {
        get {
          return true;
        }
      }
      [MonoTODO]
      public object this[int index] {
        get {
          return collection_[index];
        }
        set {
          //FIXME:
        }
      }

      //
      //  --- Public Methods
      //
      [MonoTODO]
      public bool Contains(object selectedObject) {
        return collection_.Contains(selectedObject);;
      }
      [MonoTODO]
      public void CopyTo(Array dest, int index) {
        collection_.CopyTo(dest, index);
      }
      [MonoTODO]
      public override bool Equals(object obj) {
        //FIXME:
        return base.Equals(obj);
      }
      [MonoTODO]
      public override int GetHashCode() {
        //FIXME add our proprities
        return base.GetHashCode();
      }
      [MonoTODO]
      public IEnumerator GetEnumerator() {
        return collection_.GetEnumerator();
      }
      [MonoTODO]
      public int IndexOf(object selectedObject) {
        return collection_.IndexOf(selectedObject);
      }
      /// <summary>
      /// IList Interface implmentation.
      /// </summary>
      bool IList.IsReadOnly{
        get{
          // We allow addition, removeal, and editing of items after creation of the list.
          return false;
        }
      }
      bool IList.IsFixedSize{
        get{
          // We allow addition and removeal of items after creation of the list.
          return false;
        }
      }

      //[MonoTODO]
#if A
      object IList.this[int index]{
        get{
          throw new NotImplementedException ();
        }
        set{
          throw new NotImplementedException ();
        }
      }
#endif
    
      [MonoTODO]
      void IList.Clear(){
        //FIXME:
      }
    
      [MonoTODO]
      int IList.Add( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      bool IList.Contains( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      int IList.IndexOf( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      void IList.Insert(int index, object value){
        //FIXME:
      }

      [MonoTODO]
      void IList.Remove( object value){
        //FIXME:
      }

      [MonoTODO]
      void IList.RemoveAt( int index){
        //FIXME:
      }
      // End of IList interface
      /// <summary>
      /// ICollection Interface implmentation.
      /// </summary>
      int ICollection.Count{
        get{
          throw new NotImplementedException ();
        }
      }
      bool ICollection.IsSynchronized{
        get{
          throw new NotImplementedException ();
        }
      }
      object ICollection.SyncRoot{
        get{
          throw new NotImplementedException ();
        }
      }
      void ICollection.CopyTo(Array array, int index){
        throw new NotImplementedException ();
      }
      // End Of ICollection
    }//End of subclass

    // <summary>
    // </summary>

    public class ObjectCollection : IList, ICollection {

      internal class ListBoxItem {
        public object theData_ = null;
        public string dataRepresentation_ = String.Empty;
        // FIXME: change those fields to flags
        //public bool wasSorted_ = false;
        //public bool wasAddedToControl_ = false;
        public bool IsAddedToControl_ = false;
        public bool Selected_ = false;
        public bool Checked_ = false;
        
        public ListBoxItem( object data, string representation) {
          theData_ = data;
          dataRepresentation_ = representation;
        }
      }
      
      internal class ListItemRepresentationComparer : IComparer {
        public ListItemRepresentationComparer() {
        }
  
        public int Compare(object x, object y) {
          ListBoxItem left = x as ListBoxItem;
          ListBoxItem right = y as ListBoxItem;
          if( left == null || right == null) {
            throw new ArgumentException();
          }
          return left.dataRepresentation_.CompareTo(right.dataRepresentation_);
        }
      }
/*
      internal class ListItemDataComparer : IComparer {
        public ListItemDataComparer() {
        }
  
        public int Compare(object x, object y) {
          ListBoxItem left = x as ListBoxItem;
          ListBoxItem right = y as ListBoxItem;
          if( left == null || right == null) {
            throw new ArgumentException();
          }
          return left.theData_.CompareTo(right.dataRepresentation_);
        }
      }
*/      
      internal ArrayList CreateSelectedIndicesList() {
        ArrayList result = new ArrayList();
        int ordinalNumber = 0;
        foreach( ListBoxItem lbi in items_) {
          if( lbi.Selected_) {
            result.Add(ordinalNumber);  
          }
          ++ordinalNumber;
        }
        return result;
      }
      
      internal ArrayList CreateSelectedObjectsList() {
        ArrayList result = new ArrayList();
        foreach( ListBoxItem lbi in items_) {
          if( lbi.Selected_) {
            result.Add(lbi.theData_);  
          }
        }
        return result;
      }
      
      internal ArrayList CreateCheckedIndexList() {
        ArrayList result = new ArrayList();
        int ordinalNumber = 0;
        foreach( ListBoxItem lbi in items_) {
          if( lbi.Checked_) {
            result.Add(ordinalNumber);  
          }
          ++ordinalNumber;
        }
        return result;
      }
      
      internal ArrayList CreateCheckedItemList() {
        ArrayList result = new ArrayList();
        foreach( ListBoxItem lbi in items_) {
          if( lbi.Checked_) {
            result.Add(lbi.theData_);  
          }
        }
        return result;
      }
      
      internal ListBoxItem getItemAt(int index) {
        return (ListBoxItem)items_[index];
      }
      
      internal void SwitchToSortedStyle() {
        if( owner_.IsHandleCreated) {
          Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_RESETCONTENT, 0, 0);
        }
        items_.Sort(new ListItemRepresentationComparer());
        if( owner_.IsHandleCreated) {
          foreach( ListBoxItem lbi in items_) {
            Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_ADDSTRING, 0, lbi.dataRepresentation_);
          }
        }
        owner_.OnObjectCollectionChanged();
      }
      
      internal void PopulateControl() {
        foreach( ListBoxItem lbi in items_) {
          Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_ADDSTRING, 0, lbi.dataRepresentation_);
          lbi.IsAddedToControl_ = true;
        }
      }
      
      internal void DumpItems() {
        int ordinalNumber = 0;
        foreach( ListBoxItem lbi in items_) {
          Console.WriteLine("ListBoxItem {0} order {1} checked {2}", lbi.dataRepresentation_,
                            ordinalNumber, lbi.Checked_);
          ++ordinalNumber;          
        }
      }
      
      internal class ListBoxItemEnumerator : IEnumerator {
        private IEnumerator containerEnum_ = null;
        
        public ListBoxItemEnumerator( IEnumerator containerEnum) {
          containerEnum_ = containerEnum;
        }
        
        public object Current {
          get {
            return ((ListBoxItem)containerEnum_.Current).theData_;
          }
        }
        
        public bool MoveNext() {
          return containerEnum_.MoveNext();
        }
        
        public void Reset() {
          containerEnum_.Reset();
        }
      }
      
      
      protected ListBox owner_ = null;
      protected ArrayList items_ = new ArrayList(); // has ListBoxItem
      
      //
      //  --- Constructor
      //
      [MonoTODO]
      public ObjectCollection(ListBox box) {
        owner_ = box;
      }
      [MonoTODO]
      public ObjectCollection(ListBox box, object[] objs) {
        owner_ = box;
        AddRange(objs);
      }

      //
      //  --- Public Properties
      //
      [MonoTODO]
      public int Count {
        get {
          return items_.Count;
        }
      }
      [MonoTODO]
      public bool IsReadOnly {
        get {
          // FIXME: Is it always not ReadOnly
          return false;
        }
      }
      [MonoTODO]
      public virtual object this[int index] {
        get {
          return ((ListBoxItem)items_[index]).theData_;
        }
        set {
          ((ListBoxItem)items_[index]).theData_ = value;
          // FIXME: assing representation and sort if needed
        }
      }

      //
      //  --- Public Methods
      //
      [MonoTODO]
      public int Add(object item) {
        string representation = owner_.getDisplayMemberOfObj(item);
        ListBoxItem  newItem = new ListBoxItem(item, representation);
        int result = items_.Add(newItem);
        if( owner_.Sorted) {
          items_.Sort(new ListItemRepresentationComparer());
          result = items_.BinarySearch(newItem);
          if( owner_.IsHandleCreated) {
            Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_INSERTSTRING, result, representation);
          }
          owner_.OnObjectCollectionChanged();
        }          
        else {
          if( owner_.IsHandleCreated) {
            Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_ADDSTRING, 0, representation);
          }
        }
        newItem.IsAddedToControl_ = true;
        return result;
      }
      
      [MonoTODO]
      public void AddRange(object[] items) {
        if( items == null) throw new ArgumentException();
        ListBoxItem[] newItems = new ListBoxItem[items.Length];
        int idx = 0;
        foreach( object obj in items ) {
          newItems[idx] = new ListBoxItem(obj, owner_.getDisplayMemberOfObj(obj));
          ++idx;
        }
        items_.AddRange(newItems);
        if( owner_.Sorted) {
          items_.Sort(new ListItemRepresentationComparer());
          if( owner_.IsHandleCreated) {
            int index = 0;
            foreach( ListBoxItem lbi in items_) {
              if(!lbi.IsAddedToControl_){
                Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_INSERTSTRING, index, lbi.dataRepresentation_);
              }
              ++index;
            }
          }
          owner_.OnObjectCollectionChanged();
        }
        else {
          if( owner_.IsHandleCreated) {
            foreach(ListBoxItem lbi in newItems) {
              Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_ADDSTRING, 0, lbi.dataRepresentation_);
              lbi.IsAddedToControl_ = true;
            }
          }
        }
        // FIXME: Add items to control
      }
      [MonoTODO]
      public void AddRange(ListBox.ObjectCollection collection) {
        //FIXME:
      }
      [MonoTODO]
      public void Clear() {
        //FIXME:
        items_.Clear();
        if( owner_.IsHandleCreated) {
          Win32.SendMessage(owner_.Handle, (int)ListBoxMessages.LB_RESETCONTENT, 0, 0);
        }
        owner_.OnObjectCollectionChanged();
      }
      [MonoTODO]
      public bool Contains(object value) {
        // FIXME: determine whether some of ListBoxItem has value as theData_
        foreach( ListBoxItem lbi in items_) {
          if( lbi.theData_ == value) {
            return true;
          }
        }
        return false;
      }
      [MonoTODO]
      public void CopyTo(object[] dest, int arrayIndex) {
        // FIXME: copy theData_ from ListBoxItem, not the ListBoxItems
        items_.CopyTo(dest, arrayIndex);
      }
      [MonoTODO]
      public override bool Equals(object obj) {
        //FIXME:
        return base.Equals(obj);
      }
      [MonoTODO]
      public override int GetHashCode() {
        //FIXME add our proprities
        return base.GetHashCode();
      }
      [MonoTODO]
      public IEnumerator GetEnumerator() {
        return new ListBoxItemEnumerator(items_.GetEnumerator());
      }
      [MonoTODO]
      public int IndexOf(object val) {
        // FIXME: find ListBoxItem object which has the val as theData_
        int result = -1;
        int index = 0;
        foreach( ListBoxItem lbi in items_) {
          if( lbi.theData_ == val) {
            result = index;
            break;
          }
          ++index;
        }
        return result;
      }
      [MonoTODO]
      public void Insert(int index, object item) {
        //FIXME:
      }
      [MonoTODO]
      public void Remove(object val) {
        // FIXME: use some sort of Comparer ?
        int pos = 0;
        foreach(ListBoxItem lbi in items_) {
          if( lbi.theData_ == val) {
            RemoveAt(pos);
            break;
          }
          ++pos;
        }
      }
      [MonoTODO]
      public void RemoveAt(int index) {
        if( index < 0 || index >= items_.Count) {
          //FIXME: set exception parameters
          throw new ArgumentOutOfRangeException();
        }
        items_.RemoveAt(index);
        if( owner_.IsHandleCreated) {
          Win32.SendMessage( owner_.Handle, (int)ListBoxMessages.LB_DELETESTRING, index, 0); 
        }
        owner_.OnObjectCollectionChanged();
      }
      /// <summary>
      /// IList Interface implmentation.
      /// </summary>
      bool IList.IsReadOnly{
        get{
          // We allow addition, removeal, and editing of items after creation of the list.
          return false;
        }
      }
      bool IList.IsFixedSize{
        get{
          // We allow addition and removeal of items after creation of the list.
          return false;
        }
      }

#if A
      //[MonoTODO]
      object IList.this[int index]{
        get{
          throw new NotImplementedException ();
        }
        set{
          throw new NotImplementedException ();
        }
      }
#endif
    
      [MonoTODO]
      void IList.Clear(){
        //FIXME:
      }
    
      [MonoTODO]
      int IList.Add( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      bool IList.Contains( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      int IList.IndexOf( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      void IList.Insert(int index, object value){
        //FIXME:
      }

      [MonoTODO]
      void IList.Remove( object value){
        //FIXME:
      }

      [MonoTODO]
      void IList.RemoveAt( int index){
        //FIXME:
      }
      // End of IList interface
      /// <summary>
      /// ICollection Interface implmentation.
      /// </summary>
      int ICollection.Count{
        get{
          throw new NotImplementedException ();
        }
      }
      bool ICollection.IsSynchronized{
        get{
          throw new NotImplementedException ();
        }
      }
      object ICollection.SyncRoot{
        get{
          throw new NotImplementedException ();
        }
      }
      void ICollection.CopyTo(Array array, int index){
        throw new NotImplementedException ();
      }
      // End Of ICollection
    }//end of SubClass

    // <summary>
    // </summary>

    public class SelectedIndexCollection :  IList, ICollection, IEnumerable {

      ArrayList   collection_;
      ListBox    owner_;
      
      //
      //  --- Constructor
      //
      [MonoTODO]
      public SelectedIndexCollection(ListBox owner) {
        owner_ = owner;
        collection_ = owner_.Items.CreateSelectedIndicesList();
      }

      //
      //  --- Public Properties
      //
      [MonoTODO]
      public int Count {
        get {
          return collection_.Count;
        }
      }
      [MonoTODO]
      public bool IsReadOnly {
        get {
          return true;
        }
      }
      [MonoTODO]
      public int this[int index] {
        get {
          return (int)collection_[index];
        }
      }

      //
      //  --- Public Methods
      //
      [MonoTODO]
      public bool Contains(int selectedIndex) {
        return collection_.Contains(selectedIndex);
      }
      [MonoTODO]
      public void CopyTo(Array dest, int index) {
        collection_.CopyTo(dest, index);
      }
      [MonoTODO]
      public override bool Equals(object obj) {
        //FIXME:
        return base.Equals(obj);
      }
      [MonoTODO]
      public override int GetHashCode() {
        //FIXME add our proprities
        return base.GetHashCode();
      }
      [MonoTODO]
      public IEnumerator GetEnumerator() {
        return collection_.GetEnumerator();
      }
      /// <summary>
      /// IList Interface implmentation.
      /// </summary>
      bool IList.IsReadOnly{
        get{
          // We allow addition, removeal, and editing of items after creation of the list.
          return false;
        }
      }
      bool IList.IsFixedSize{
        get{
          // We allow addition and removeal of items after creation of the list.
          return false;
        }
      }

      //[MonoTODO]
      object IList.this[int index]{
        get{
          throw new NotImplementedException ();
        }
        set{
          //FIXME:
        }
      }
    
      [MonoTODO]
      void IList.Clear(){
        //FIXME:
      }
    
      [MonoTODO]
      int IList.Add( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      bool IList.Contains( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      int IList.IndexOf( object value){
        throw new NotImplementedException ();
      }

      [MonoTODO]
      void IList.Insert(int index, object value){
        //FIXME:
      }

      [MonoTODO]
      void IList.Remove( object value){
        //FIXME:
      }

      [MonoTODO]
      void IList.RemoveAt( int index){
        throw new NotImplementedException ();
      }
      // End of IList interface
      /// <summary>
      /// ICollection Interface implmentation.
      /// </summary>
      int ICollection.Count{
        get{
          throw new NotImplementedException ();
        }
      }
      bool ICollection.IsSynchronized{
        get{
          throw new NotImplementedException ();
        }
      }
      object ICollection.SyncRoot{
        get{
          throw new NotImplementedException ();
        }
      }
      void ICollection.CopyTo(Array array, int index){
        throw new NotImplementedException ();
      }
      // End Of ICollection

    }//End of subclass

    

  }
}
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