PreviewScroll Event

In This Topic

This event is raised when the user scrolls through the GdViewer control area using the mouse move or when they scroll using the vertical or the horizontal scrollbars directly.

The event makes use of tunel routing strategy. Please check the corresponded GdViewer.ScrollEventArgs for more details.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Event PreviewScroll As GdViewer.PreviewScrollHandler

public event GdViewer.PreviewScrollHandler PreviewScroll

public event PreviewScroll: GdViewer.PreviewScrollHandler;

In JScript, you can handle the events defined by another class, but you cannot define your own.

public: __event GdViewer.PreviewScrollHandler* PreviewScroll

public:
event GdViewer.PreviewScrollHandler^ PreviewScroll

Event Data

The event handler receives an argument of type GdViewer.ScrollEventArgs containing data related to this event. The following GdViewer.ScrollEventArgs properties provide information specific to this event.

Property	Description
Handled	(Inherited from System.Windows.RoutedEventArgs)
OriginalSource	(Inherited from System.Windows.RoutedEventArgs)
RoutedEvent	(Inherited from System.Windows.RoutedEventArgs)
Source	(Inherited from System.Windows.RoutedEventArgs)

Example

Please follow the example for the Scroll event to motivate yourself on how to utilize this event in your GdViewer control.

Reference

GdViewer Class
GdViewer Members
GdViewer.PreviewScrollHandler Delegate
GdViewer.ScrollEventArgs Class
SetHorizontalScrollBarPosition Method
SetVerticalScrollBarPosition Method