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//------------------------------------------------------------------------------
// <copyright file="UnsettableComboBox.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.Design.MobileControls.Util
{
using System;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
// Standard combobox with a "Not Set" item as the first item in its dropdown.
// It also automatically blanks out the "Not Set" item on losing focus.
[
System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand,
Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)
]
[Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
internal class UnsettableComboBox : ComboBox
{
private String notSetText;
private String notSetCompactText;
internal UnsettableComboBox()
{
notSetText = SR.GetString(SR.UnsettableComboBox_NotSetText);
notSetCompactText = SR.GetString(SR.UnsettableComboBox_NotSetCompactText);
}
internal String NotSetText
{
get
{
return notSetText;
}
set
{
notSetText = value;
}
}
internal String NotSetCompactText
{
get
{
return notSetCompactText;
}
set
{
notSetCompactText = value;
}
}
public override String Text
{
get
{
// handle DropDown styles in Templating Options dialog
// if (this.SelectedIndex == 0) || (this.SelectedIndex == -1))
if (this.SelectedIndex == 0)
{
return String.Empty;
}
else
{
return base.Text;
}
}
set
{
if (value == notSetCompactText)
{
base.Text = String.Empty;
}
else
{
base.Text = value;
}
}
}
internal void AddItem(Object item)
{
EnsureNotSetItem();
Items.Add(item);
}
internal void EnsureNotSetItem()
{
if (Items.Count == 0)
{
Items.Add(notSetText);
}
}
#if UNUSED_CODE
internal bool IsSet()
{
return SelectedIndex > 0;
}
#endif
protected override void OnLostFocus(EventArgs e)
{
base.OnLostFocus(e);
if (SelectedIndex == 0)
{
SelectedIndex = -1;
}
}
protected override void SetItemsCore(IList values)
{
Items.Clear();
if (!DesignMode)
{
Items.Add(notSetText);
}
// Unfortunately. the interfaces between SetItemsCore and
// AddItemsCore are mismatched as of 3106.
ArrayList items = new ArrayList();
foreach(Object item in values)
{
items.Add(item);
}
base.AddItemsCore(items.ToArray());
}
}
}
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