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/*************************************************************************************
Extended WPF Toolkit
Copyright (C) 2007-2013 Xceed Software Inc.
This program is provided to you under the terms of the Microsoft Public
License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
For more features, controls, and fast professional support,
pick up the Plus Edition at http://xceed.com/wpf_toolkit
Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
***********************************************************************************/
using System.Windows.Controls;
using System.Windows;
namespace Xceed.Wpf.AvalonDock.Controls
{
public class MenuItemEx : MenuItem
{
#region Members
private bool _reentrantFlag = false;
#endregion
#region Constructors
static MenuItemEx()
{
IconProperty.OverrideMetadata( typeof( MenuItemEx ), new FrameworkPropertyMetadata( new PropertyChangedCallback( OnIconPropertyChanged ) ) );
}
public MenuItemEx()
{
}
#endregion
#region Properties
#region IconTemplate
/// <summary>
/// IconTemplate Dependency Property
/// </summary>
public static readonly DependencyProperty IconTemplateProperty = DependencyProperty.Register( "IconTemplate", typeof( DataTemplate ), typeof( MenuItemEx ),
new FrameworkPropertyMetadata( ( DataTemplate )null, new PropertyChangedCallback( OnIconTemplateChanged ) ) );
/// <summary>
/// Gets or sets the IconTemplate property. This dependency property
/// indicates the data template for the icon.
/// </summary>
public DataTemplate IconTemplate
{
get
{
return ( DataTemplate )GetValue( IconTemplateProperty );
}
set
{
SetValue( IconTemplateProperty, value );
}
}
/// <summary>
/// Handles changes to the IconTemplate property.
/// </summary>
private static void OnIconTemplateChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
{
( ( MenuItemEx )d ).OnIconTemplateChanged( e );
}
/// <summary>
/// Provides derived classes an opportunity to handle changes to the IconTemplate property.
/// </summary>
protected virtual void OnIconTemplateChanged( DependencyPropertyChangedEventArgs e )
{
UpdateIcon();
}
#endregion
#region IconTemplateSelector
/// <summary>
/// IconTemplateSelector Dependency Property
/// </summary>
public static readonly DependencyProperty IconTemplateSelectorProperty = DependencyProperty.Register( "IconTemplateSelector", typeof( DataTemplateSelector ), typeof( MenuItemEx ),
new FrameworkPropertyMetadata( ( DataTemplateSelector )null, new PropertyChangedCallback( OnIconTemplateSelectorChanged ) ) );
/// <summary>
/// Gets or sets the IconTemplateSelector property. This dependency property
/// indicates the DataTemplateSelector for the Icon.
/// </summary>
public DataTemplateSelector IconTemplateSelector
{
get
{
return ( DataTemplateSelector )GetValue( IconTemplateSelectorProperty );
}
set
{
SetValue( IconTemplateSelectorProperty, value );
}
}
/// <summary>
/// Handles changes to the IconTemplateSelector property.
/// </summary>
private static void OnIconTemplateSelectorChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
{
( ( MenuItemEx )d ).OnIconTemplateSelectorChanged( e );
}
/// <summary>
/// Provides derived classes an opportunity to handle changes to the IconTemplateSelector property.
/// </summary>
protected virtual void OnIconTemplateSelectorChanged( DependencyPropertyChangedEventArgs e )
{
UpdateIcon();
}
#endregion
#endregion
#region Private Mehods
private static void OnIconPropertyChanged( DependencyObject sender, DependencyPropertyChangedEventArgs e )
{
if( e.NewValue != null )
{
( ( MenuItemEx )sender ).UpdateIcon();
}
}
private void UpdateIcon()
{
if( _reentrantFlag )
return;
_reentrantFlag = true;
if( IconTemplateSelector != null )
{
var dataTemplateToUse = IconTemplateSelector.SelectTemplate( Icon, this );
if( dataTemplateToUse != null )
Icon = dataTemplateToUse.LoadContent();
}
else if( IconTemplate != null )
Icon = IconTemplate.LoadContent();
_reentrantFlag = false;
}
#endregion
}
}
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