Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Controls / ScrollChangedEventArgs.cs / 1305600 / ScrollChangedEventArgs.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Windows; namespace System.Windows.Controls { ////// This delegate is used by handlers of the ScrollChangedEvent event. /// /// The current element along the event's route. /// The event arguments containing additional information about the event. ///Nothing. public delegate void ScrollChangedEventHandler(object sender, ScrollChangedEventArgs e); ////// The ScrollChangedEventsArgs describe a change in scrolling state. /// public class ScrollChangedEventArgs: RoutedEventArgs { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors ////// Constructor /// internal ScrollChangedEventArgs(Vector offset, Vector offsetChange, Size extent, Vector extentChange, Size viewport, Vector viewportChange) { _offset = offset; _offsetChange = offsetChange; _extent = extent; _extentChange = extentChange; _viewport = viewport; _viewportChange = viewportChange; } #endregion Constructors //-------------------------------------------------------------------- // // Public Properties (CLR + Avalon) // //------------------------------------------------------------------- #region Public Properties ////// Updated HorizontalPosition of the scrolled content /// public double HorizontalOffset { get { return _offset.X; } } ////// /// Updated VerticalPosition of the scrolled content /// public double VerticalOffset { get { return _offset.Y; } } ////// /// Change in horizontal offset of the scrolled content /// public double HorizontalChange { get { return _offsetChange.X; } } ////// /// Change in vertical offset of the scrolled content /// public double VerticalChange { get { return _offsetChange.Y; } } ////// /// Updated horizontal size of the viewing window of the ScrollViewer /// public double ViewportWidth { get { return _viewport.Width; } } ////// /// Updated vertical size of the viewing window of the ScrollViewer. /// public double ViewportHeight { get { return _viewport.Height; } } ////// /// Change in the horizontal size of the viewing window of the ScrollViewer /// public double ViewportWidthChange { get { return _viewportChange.X; } } ////// /// Change in the vertical size of the viewing window of the ScrollViewer. /// public double ViewportHeightChange { get { return _viewportChange.Y; } } ////// /// Updated horizontal size of the scrollable content. /// public double ExtentWidth { get { return _extent.Width; } } ////// /// Updated vertical size of the scrollable content. /// public double ExtentHeight { get { return _extent.Height; } } ////// /// Change in the horizontal size of the scrollable content. /// public double ExtentWidthChange { get { return _extentChange.X; } } ////// /// Change in the vertical size of the scrollable content. /// public double ExtentHeightChange { get { return _extentChange.Y; } } #endregion //-------------------------------------------------------------------- // // Protected Methods // //-------------------------------------------------------------------- #region Protected Methods ////// /// This method is used to perform the proper type casting in order to /// call the type-safe ScrollChangedEventHandler delegate for the ScrollChangedEvent event. /// /// The handler to invoke. /// The current object along the event's route. protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget) { ScrollChangedEventHandler handler = (ScrollChangedEventHandler)genericHandler; handler(genericTarget, this); } #endregion //------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------- #region Private Fields // Current scroll data private Vector _offset; private Vector _offsetChange; private Size _extent; private Vector _extentChange; private Size _viewport; private Vector _viewportChange; #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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