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ScrollViewer Event
See Also  Example
Leadtools.WinForms Namespace > RasterImageViewer Class : ScrollViewer Event



Occurs when either the horizontal or vertical scroll bar of the RasterImageViewer changes.

Syntax

Visual Basic (Declaration) 
Public Event ScrollViewer() As EventHandler
Visual Basic (Usage)Copy Code
Dim instance As RasterImageViewer
Dim handler As EventHandler
 
AddHandler instance.ScrollViewer, handler
C# 
public event EventHandler ScrollViewer()
C++/CLI 
public:
event EventHandler^ ScrollViewer();

Example

This displays the scroll positions after each zoom

Visual BasicCopy Code
Private Sub viewer_ScrollViewer(ByVal sender As Object, ByVal e As EventArgs)
    Dim viewer As RasterImageViewer = CType(IIf(TypeOf sender Is RasterImageViewer, sender, Nothing), RasterImageViewer)
    Dim s As String = String.Format("ScrollPosition: {0}", viewer.ScrollPosition)
    Console.WriteLine(s)
End Sub
Public Sub RasterImageViewer_ScrollViewer(ByVal viewer As RasterImageViewer)
    AddHandler viewer.ScrollViewer, AddressOf viewer_ScrollViewer

    MessageBox.Show("Scroll the image and the 'ScrollViewer' event gets fired")
    ' or do something in code to cause a scroll
End Sub
C#Copy Code
private void viewer_ScrollViewer(object sender, EventArgs e) 
{ 
   RasterImageViewer viewer = sender as RasterImageViewer; 
   string s = string.Format("ScrollPosition: {0}", viewer.ScrollPosition); 
   Console.WriteLine(s); 
} 
public void RasterImageViewer_ScrollViewer(RasterImageViewer viewer) 
{ 
   viewer.ScrollViewer += new EventHandler(viewer_ScrollViewer); 
 
   MessageBox.Show("Scroll the image and the 'ScrollViewer' event gets fired"); 
   // or do something in code to cause a scroll 
}

Remarks

This event is raised if the horizontal or vertical scroll bar of the RasterImageViewer changes, either through programmatic modification or user interaction.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also