DomainUpDown.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 » DomainUpDown.cs
//
// System.Windows.Forms.DomainUpDown
//
// Author:
//   stubbed out by Richard Baumann (biochem333@nyc.rr.com)
//   Dennis Hayes (dennish@Raytek.com)
//   implemented by Aleksey Ryabchuk (ryabchuk@yahoo.com)
// (C) Ximian, Inc., 2002
//

//
// 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.ComponentModel;
using System.Globalization;

namespace System.Windows.Forms{

  // <summary>
  //  Represents a Windows up-down control that displays string values.
  // </summary>
  public class DomainUpDown : UpDownBase {

    
    DomainUpDownItemCollection items;
    int selectedIndex;
    bool sorted;
    bool wrap;

    [MonoTODO]
    public DomainUpDown() : base()
    {
      selectedIndex = -1;
      sorted = false;
      wrap = false;
      TextChanged += new EventHandler ( this.BuddyTextChanged );
    }

    
    public override void DownButton()
    {
      int newIndex = SelectedIndex + 1;
      if (  newIndex < Items.Count )
        SelectedIndex = newIndex;
      else if ( Wrap && Items.Count > 0)
        SelectedIndex = 0;
        
    }

    public override string ToString()
    {
      return GetType( ).FullName.ToString( ) + ", Items.Count: " + Items.Count.ToString ( ) + 
        ", SelectedIndex: " + SelectedIndex;
    }

    public override void UpButton()
    {
      int newIndex = SelectedIndex - 1;
      if ( newIndex > -1 && newIndex < Items.Count )
        SelectedIndex = newIndex;
      else if ( Wrap && Items.Count > 0 )
        SelectedIndex = Items.Count - 1;
    }

    [MonoTODO]
    protected override AccessibleObject CreateAccessibilityInstance()
    {
      //FIXME:
      return base.CreateAccessibilityInstance();
    }

    protected void OnSelectedItemChanged(object source, EventArgs e)
    {
      if (SelectedItemChanged != null) 
        SelectedItemChanged(this, e);
    }

    [MonoTODO]
    protected override void OnChanged(object source, EventArgs e) {
      base.OnChanged(source, e);
    }

    [MonoTODO]
    protected override void OnTextBoxKeyDown(object source, KeyEventArgs e)
    {
      if ( ReadOnly ) {
        char symbol = System.Convert.ToChar( (int)e.KeyCode );
        
        if ( Char.IsLetterOrDigit ( symbol ) ) {
          string lower = Char.ToLower ( symbol ).ToString ( );
          string upper = Char.ToUpper ( symbol ).ToString ( );

          foreach ( object item in Items ) {
            string sitem = item.ToString ( );
            if ( sitem.StartsWith ( upper ) || sitem.StartsWith ( lower ) ) {
              SelectedItem = item;
              break;
            }
          }
          e.Handled = true;
        }
      }
      base.OnTextBoxKeyDown ( source, e );
    }

    protected override void UpdateEditText ( )
    {
      if ( SelectedIndex != -1 )
        Text = Items [ SelectedIndex ].ToString ( );
      else
        Text = String.Empty;
    }

    public event EventHandler SelectedItemChanged;

    public DomainUpDown.DomainUpDownItemCollection Items {
      get {
        if ( items == null )
          items = new DomainUpDownItemCollection ( this );
        return items; 
      }
    }

    [MonoTODO]
    public int SelectedIndex {
      get { return selectedIndex; }
      set {
        if ( value < -1 || value >= Items.Count )
          throw new ArgumentException ( ); // FIXME: message

        if ( selectedIndex != value ) {
          selectedIndex = value;
          UpdateEditText ( );
        }
      }
    }

    [MonoTODO]
    public object SelectedItem {
      get { 
        if ( SelectedIndex == -1 )
          return null;
        return Items[ SelectedIndex ];
      }
      set {
        SelectedIndex = Items.IndexOf ( value );
      }
    }

    [MonoTODO]
    public bool Sorted {
      get { return sorted; }
      set { 
        if ( sorted != value ) {
          object selectedItem = SelectedItem;
          Items.Sort ( );
          SelectedItem = selectedItem;
        }
      }
    }

    public bool Wrap { 
      get { return wrap; }
      set { wrap = value; }
    }

    private void itemAdded ( object item )
    {
    }

    private void itemInserted ( int index, object item )
    {
    }

    private void itemRemoved ( object item )
    {
    }

    private void itemRemoved ( int index )
    {
    }

    private void itemChanged ( int index )
    {
      if ( index == SelectedIndex )
        UpdateEditText ( );
    }

    private void BuddyTextChanged ( object sender, EventArgs e )
    {
      OnSelectedItemChanged ( this, EventArgs.Empty );
    }

    //System.Windows.Forms.DomainUpDown.DomainUpDownItemCollection
    //
    //Author:
    //stubbed out by Richard Baumann (biochem333@nyc.rr.com)
    //
    //(C) Ximian, Inc., 2002
    //
    //<summary>
    //Encapsulates a collection of objects for use by the DomainUpDown class.
    //</summary>
    public class DomainUpDownItemCollection : ArrayList {

      DomainUpDown owner;

      internal DomainUpDownItemCollection( DomainUpDown owner )
      {
        this.owner = owner;
      }

      public override int Add( object value )
      {
        int index =  base.Add ( value );
        owner.itemAdded ( value );
        return index;
      }

      public override void Insert( int index, object value )
      {
        base.Insert ( index, value );
        owner.itemInserted ( index, value );
      }

      public override void Remove( object obj )
      {
        base.Remove ( obj );
        owner.itemRemoved ( obj );
      }

      public override void RemoveAt( int index )
      {
        base.RemoveAt ( index );
        owner.itemRemoved ( index );
      }

      public override object this[ int index ]
      {
        get {
          return base[index];
        }
        set {
          base[index] = value;
          owner.itemChanged ( index );
        }
      }
    }
  }
}
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