File: System\Windows\Input\IInputProvider.cs
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Project: src\src\Microsoft.DotNet.Wpf\src\PresentationCore\PresentationCore.csproj (PresentationCore)
// 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.
 
using System.Windows.Media;
 
using System;
 
namespace System.Windows.Input 
{
    /// <summary>
    ///     An interface implemented by all input providers.
    /// </summary>
    internal interface IInputProvider
    {
        /// <summary>
        ///     Indicates if the provider is responsible for providing
        ///     input for the specified visual.
        /// </summary>
        bool ProvidesInputForRootVisual(Visual v);
 
        /// <summary>
        ///     Notifies the input provider that it is no longer 
        ///     the active input provider.  If the input provider
        ///     needs to report more input, it will need to reactivate.
        /// </summary>
        void NotifyDeactivate();
    }
}