ImageGear .NET v25.2 - Updated
ImageGear.Presentation Assembly / ImageGear.Display Namespace / ImGearPresentationPageDisplay Class / HandleUpdate Method
IImGearScrollableView page view control to draw image in.




In This Topic
    HandleUpdate Method (ImGearPresentationPageDisplay)
    In This Topic
    Handles update event. This handler is called synchronously by page view control, when its Update() method is called.
    Syntax
    'Declaration
     
    Public Sub HandleUpdate( _
       ByVal pageView As IImGearScrollableView _
    ) 
    'Usage
     
    Dim instance As ImGearPresentationPageDisplay
    Dim pageView As IImGearScrollableView
     
    instance.HandleUpdate(pageView)
    public void HandleUpdate( 
       IImGearScrollableView pageView
    )
    public: void HandleUpdate( 
       IImGearScrollableView* pageView
    ) 
    public:
    void HandleUpdate( 
       IImGearScrollableView^ pageView
    ) 

    Parameters

    pageView
    IImGearScrollableView page view control to draw image in.
    Remarks
    The Update() method of page view control can make updates to the page display asynchronously. It means, that some parameters of the page display may be incorrect immediately after calling the Update() method of page view. As a result some methods, such as GetZoomInfo may return incorrect results.

    This method synchronizes the internal data structures. Any custom page viewer, which implements IImGearScrollableView interface, should call this handler from Update() method to allow the page display to update some internal parameters synchronously.

    See Also