Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / DataObjectCopyingEventArgs.cs / 1 / DataObjectCopyingEventArgs.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: DataObject.Copying event arguments // //--------------------------------------------------------------------------- using System; namespace System.Windows { ////// Arguments for the DataObject.Copying event. /// /// The DataObject.Copying event is raised when an editor /// has converted a content of selection into all appropriate /// clipboard data formats, collected them all in DataObject /// and is ready to put the objet onto the Clipboard. /// An application can inspect DataObject, change, remove or /// add some data formats into it and decide whether to proceed /// with the copying or cancel it. /// public sealed class DataObjectCopyingEventArgs : DataObjectEventArgs { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors ////// Creates an arguments for a DataObject.Copying event. /// This object created by editors executing a Copy and Drag. /// /// /// DataObject filled in with all appropriate data formats /// and ready for putting into the Clipboard /// or to used in dragging gesture. /// /// /// A flag indicating if this operation is part of drag/drop. /// Copying event is fired on drag start. /// public DataObjectCopyingEventArgs(IDataObject dataObject, bool isDragDrop) // : base(System.Windows.DataObject.CopyingEvent, isDragDrop) { if (dataObject == null) { throw new ArgumentNullException("dataObject"); } _dataObject = dataObject; } #endregion Constructors //------------------------------------------------------ // // Public Properties // //----------------------------------------------------- #region Public Properties ////// DataObject filled in with all appropriate data formats /// and ready for putting into the Clipboard. /// public IDataObject DataObject { get { return _dataObject; } } #endregion Public Properties #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) { DataObjectCopyingEventHandler handler = (DataObjectCopyingEventHandler)genericHandler; handler(genericTarget, this); } #endregion Protected Methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields private IDataObject _dataObject; #endregion Private Fields } ////// The delegate to use for handlers that receive the DataObject.Copying event. /// ////// A handler for DataObject.Copying event. /// The handler is expected to inspect the content of a data object /// passed via event arguments (DataObjectCopyingEventArgs.DataObject) /// and add additional (custom) data format to it. /// It's also possible for the handler to change /// the contents of other data formats already put on DataObject /// or even remove some of those formats. /// All this happens before DataObject is put on /// the Clipboard (in copy operation) or before DragDrop /// process starts. /// The handler can cancel the whole copying event /// by calling DataObjectCopyingEventArgs.CancelCommand method. /// For the case of Copy a command will be cancelled, /// for the case of DragDrop a dragdrop process will be /// terminated in the beginning. /// public delegate void DataObjectCopyingEventHandler(object sender, DataObjectCopyingEventArgs e); } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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