// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
#region Using declarations
 
using System.Windows.Input;
 
#if RIBBON_IN_FRAMEWORK
namespace System.Windows.Controls.Ribbon
#else
namespace Microsoft.Windows.Controls.Ribbon
#endif
{
    #endregion
 
    /// <summary>
    ///   Implements Ribbon's special ToolTip service.
    /// </summary>
    internal class RibbonToolTipService
    {
        #region Constructors
 
        internal RibbonToolTipService()
        {
            InputManager.Current.PostProcessInput += new ProcessInputEventHandler(OnPostProcessInput);
        }
 
        #endregion Constructors
 
        #region Internal Methods
 
        private void OnPostProcessInput(object sender, ProcessInputEventArgs e)
        {
            if (e.StagingItem.Input.RoutedEvent == Keyboard.KeyDownEvent)
            {
                KeyEventArgs keyArgs = (KeyEventArgs)e.StagingItem.Input;
                ProcessKeyDown(sender, keyArgs);
            }
        }
 
        private void ProcessKeyDown(object sender, KeyEventArgs e)
        {
            // Dismiss ToolTips on KeyDown
 
            if (CurrentToolTip != null)
            {
                CurrentToolTip.IsOpen = false;
            }
        }
 
        #endregion Internal Methods
 
        #region Properties
 
        internal static RibbonToolTipService Current
        {
            get 
            { 
                if (_current == null)
                {
                    _current = new RibbonToolTipService();
                }
 
                return _current; 
            }
        }
 
        internal RibbonToolTip CurrentToolTip
        {
            get { return _currentToolTip; }
            set { _currentToolTip = value; }
        }
 
        #endregion Properties
 
        #region Data
 
        private RibbonToolTip _currentToolTip;
 
        [ThreadStatic]
        private static RibbonToolTipService _current;
 
        #endregion Data
    }
}