QueryContinueDragEventArgs.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / QueryContinueDragEventArgs.cs / 1 / QueryContinueDragEventArgs.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// File: QueryContinueDragEventArgs.cs
//
// Copyright (C) Microsoft Corporation.  All rights reserved. 
//
// Description: QueryContinueDragEventArgs for drag-and-drop operation. 
// 
// History:
//  08/19/2004 : [....]    Created 
//
//---------------------------------------------------------------------------

using System; 
using System.Diagnostics;
 
using SR=MS.Internal.PresentationCore.SR; 
using SRID=MS.Internal.PresentationCore.SRID;
 
namespace System.Windows
{
    /// 
    /// The QueryContinueDragEventArgs class represents a type of RoutedEventArgs that 
    /// are relevant to QueryContinueDrag event.
    ///  
    public sealed class QueryContinueDragEventArgs : RoutedEventArgs 
    {
        //----------------------------------------------------- 
        //
        //  Constructors
        //
        //----------------------------------------------------- 

        #region Constructors 
 
        /// 
        /// Initializes a new instance of the QueryContinueDragEventArgs class. 
        /// 
        /// 
        /// Escape key was pressed.
        ///  
        /// 
        /// Input states. 
        ///  
        internal QueryContinueDragEventArgs(bool escapePressed, DragDropKeyStates dragDropKeyStates)
        { 
            if (!DragDrop.IsValidDragDropKeyStates(dragDropKeyStates))
            {
                Debug.Assert(false, "Invalid dragDropKeyStates");
            } 

            this._escapePressed = escapePressed; 
            this._dragDropKeyStates = dragDropKeyStates; 
        }
 
        #endregion Constructors

        //------------------------------------------------------
        // 
        //  Public Methods
        // 
        //----------------------------------------------------- 

        #region Public Methods 

        /// 
        /// Escape key was pressed.
        ///  
        public bool EscapePressed
        { 
            get { return _escapePressed; } 
        }
 
        /// 
        /// The DragDropKeyStates that indicates the current states for
        /// physical keyboard keys and mouse buttons.
        ///  
        public DragDropKeyStates KeyStates
        { 
            get {return _dragDropKeyStates;} 
        }
 
        /// 
        /// The action of drag operation
        /// 
        public DragAction Action 
        {
            get 
            { 
                return _action;
            } 

            set
            {
                if (!DragDrop.IsValidDragAction(value)) 
                {
                    throw new ArgumentException(SR.Get(SRID.DragDrop_DragActionInvalid, "value")); 
                } 

                _action = value; 
            }
        }

        #endregion Public Methods 

        #region Protected Methods 
 
        //------------------------------------------------------
        // 
        //  Protected Methods
        //
        //------------------------------------------------------
 
        /// 
        /// The mechanism used to call the type-specific handler on the target. 
        ///  
        /// 
        /// The generic handler to call in a type-specific way. 
        /// 
        /// 
        /// The target to call the handler on.
        ///  
        protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget)
        { 
            QueryContinueDragEventHandler handler = (QueryContinueDragEventHandler)genericHandler; 
            handler(genericTarget, this);
        } 

        #endregion Protected Methods

        //----------------------------------------------------- 
        //
        //  Private Fields 
        // 
        //------------------------------------------------------
 
        #region Private Fields

        private bool _escapePressed;
        private DragDropKeyStates _dragDropKeyStates; 
        private DragAction _action;
 
        #endregion Private Fields 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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