InteractivePage Event

C#
Visual Basic
Objective-C
Java
C++

public event EventHandler<RasterViewerLineEventArgs> InteractivePage

'Declaration
 
Public Event InteractivePage As EventHandler(Of RasterViewerLineEventArgs)

'Usage
 
Dim instance As RasterImageViewer
Dim handler As EventHandler(Of RasterViewerLineEventArgs)
 
AddHandler instance.InteractivePage, handler

public:
event EventHandler<RasterViewerLineEventArgs^>^ InteractivePage

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

Property	Description
Begin	Returns the beginning point for the current interactive mode line.
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets or sets a value indicating whether the interactive mode should be canceled.
End	Returns the end point for the current interactive mode line.
Status (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets the current status of the interactive mode.

Only occurs when the InteractiveMode property is set to RasterViewerInteractiveMode.Page.

This sample loads all pages of a multipage file into the viewer, and lets you drag the mouse to view the pages. Also, it displays the contents of the InteractivePage event in the console

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools.WinForms
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Drawing

Private Sub viewer_InteractivePage(ByVal sender As Object, ByVal e As RasterViewerLineEventArgs)
   Dim viewer As RasterImageViewer = CType(IIf(TypeOf sender Is RasterImageViewer, sender, Nothing), RasterImageViewer)
   If e.Status = RasterViewerInteractiveStatus.Begin Then
      viewer.Cursor = Cursors.SizeNS
   ElseIf e.Status = RasterViewerInteractiveStatus.End Then
      viewer.Cursor = Cursors.Default
   End If
   Console.WriteLine("InteractivePage: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel)
End Sub
Public Sub RasterImageViewer_InteractivePage(ByVal viewer As RasterImageViewer)
   ' Load a multipage file
   Dim codecs As RasterCodecs = New RasterCodecs()
   viewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "eye.gif"))
   codecs.Dispose()

   viewer.InteractiveMode = RasterViewerInteractiveMode.Page
   AddHandler viewer.InteractivePage, AddressOf viewer_InteractivePage

   MessageBox.Show("Drag mouse across image to view different pages")
   ' After you are done, you must remove the event handler as in below
   '
   ' viewer.InteractivePage -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePage);
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

using Leadtools.WinForms;
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Color;
using Leadtools.Drawing;

private void viewer_InteractivePage(object sender, RasterViewerLineEventArgs e)
{
   RasterImageViewer viewer = sender as RasterImageViewer;
   if (e.Status == RasterViewerInteractiveStatus.Begin)
      viewer.Cursor = Cursors.SizeNS;
   else if (e.Status == RasterViewerInteractiveStatus.End)
      viewer.Cursor = Cursors.Default;
   Console.WriteLine("InteractivePage: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel);
}
public void RasterImageViewer_InteractivePage(RasterImageViewer viewer)
{
   // Load a multipage file
   RasterCodecs codecs = new RasterCodecs();
   viewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "eye.gif"));
   codecs.Dispose();

   viewer.InteractiveMode = RasterViewerInteractiveMode.Page;
   viewer.InteractivePage += new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePage);

   MessageBox.Show("Drag mouse across image to view different pages");
   // After you are done, you must remove the event handler as in below
   //
   // viewer.InteractivePage -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePage);
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Target Platforms

Reference

RasterImageViewer Class
RasterImageViewer Members