Viewer.OnViewChanged event (Visio Viewer)

Article
09/13/2021

Occurs when the view of the current page is changed in Microsoft Visio Viewer.

Syntax

expression.OnViewChanged (PageXAtViewCenter, PageYAtViewCenter, ZoomFactor)

expression An expression that returns a Viewer object.

Parameters

Name	Required/Optional	Data type	Description
PageXAtViewCenter	Required	Double	The x-coordinate, in drawing units, of the center of the page.
PageYAtViewCenter	Required	Double	The y-coordinate, in drawing units, of the center of the page.
ZoomFactor	Required	Double	The factor by which the zoom (the page size) is multiplied.

Return value

Nothing

Remarks

The page view consists of the center point of the page, expressed in x-y page coordinates, with the origin of the coordinate system at the lower-left corner of the page, and the zoom factor, expressed as a numerical percentage, ranging from 1% to 400%.

You can get the current page view in Visio Viewer by using the GetPageView method, and you can set the page view programmatically by using the SetPageView method.

Example

The following code shows how to use the OnViewChanged event to display the new page-view data in the Immediate window.

Private Sub vsoViewer_OnViewChanged(ByVal PageXAtViewCenter As Double, ByVal PageYAtViewCenter As Double, ByVal ZoomFactor As Double)

    Dim dblXPoint As Double

    Dim dblYPoint As Double

    Dim dblZoomFactor As Double

    vsoViewer.GetPageView dblXPoint, dblYPoint, dblZoomFactor

    Debug.Print "New x-coordinate is:"; dblXPoint

    Debug.Print "New y-coordinate is:"; dblYPoint

    Debug.Print "New zoom factor is:"; dblZoomFactor

End Sub

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