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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="MenuItemExtensions.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// Defines the MenuItemExtensions type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.AttachedProperties
{
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
/// <summary>
/// The menu item extensions.
/// </summary>
public class MenuItemExtensions : DependencyObject
{
#region Constants and Fields
/// <summary>
/// The group name property.
/// </summary>
public static readonly DependencyProperty GroupNameProperty = DependencyProperty.RegisterAttached(
"GroupName",
typeof(string),
typeof(MenuItemExtensions),
new PropertyMetadata(String.Empty, OnGroupNameChanged));
/// <summary>
/// The element to group names.
/// </summary>
public static Dictionary<MenuItem, String> ElementToGroupNames = new Dictionary<MenuItem, String>();
#endregion
#region Public Methods
/// <summary>
/// The get group name.
/// </summary>
/// <param name="element">
/// The element.
/// </param>
/// <returns>
/// The group name as a string.
/// </returns>
public static string GetGroupName(MenuItem element)
{
return element.GetValue(GroupNameProperty).ToString();
}
/// <summary>
/// The set group name.
/// </summary>
/// <param name="element">
/// The element.
/// </param>
/// <param name="value">
/// The value.
/// </param>
public static void SetGroupName(MenuItem element, string value)
{
element.SetValue(GroupNameProperty, value);
}
#endregion
#region Methods
/// <summary>
/// The menu item checked.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private static void MenuItemChecked(object sender, RoutedEventArgs e)
{
var menuItem = e.OriginalSource as MenuItem;
foreach (var item in ElementToGroupNames)
{
if (item.Key != menuItem && item.Value == GetGroupName(menuItem))
{
item.Key.IsChecked = false;
}
}
}
/// <summary>
/// The on group name changed.
/// </summary>
/// <param name="d">
/// The d.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private static void OnGroupNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
MenuItem menuItem = d as MenuItem;
if (menuItem != null)
{
string newGroupName = e.NewValue.ToString();
string oldGroupName = e.OldValue.ToString();
if (string.IsNullOrEmpty(newGroupName))
{
RemoveCheckboxFromGrouping(menuItem);
}
else
{
if (newGroupName != oldGroupName)
{
if (!string.IsNullOrEmpty(oldGroupName))
{
RemoveCheckboxFromGrouping(menuItem);
}
ElementToGroupNames.Add(menuItem, e.NewValue.ToString());
menuItem.Checked += MenuItemChecked;
}
}
}
}
/// <summary>
/// The remove checkbox from grouping.
/// </summary>
/// <param name="checkBox">
/// The check box.
/// </param>
private static void RemoveCheckboxFromGrouping(MenuItem checkBox)
{
ElementToGroupNames.Remove(checkBox);
checkBox.Checked -= MenuItemChecked;
}
#endregion
}
}
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