File: System\Windows\Input\InputDevice.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.Threading;
 
using System;
 
namespace System.Windows.Input
{
    /// <summary>
    ///     Provides the base class for all input devices.
    /// </summary>
    public abstract class InputDevice : DispatcherObject
    {
        /// <summary>
        ///     Constructs an instance of the InputDevice class.
        /// </summary>
        protected InputDevice()
        {
            // Only we can create these.
            // But perhaps HID devices can create these too? 
        }
 
        /// <summary>
        ///     Returns the element that input from this device is sent to.
        /// </summary>
        public abstract IInputElement Target{get;}
 
        /// <summary>
        ///     Returns the PresentationSource that is reporting input for this device.
        /// </summary>
        public abstract PresentationSource ActiveSource { get; }
    }
}