FormProgressCallback Delegate

C#
Visual Basic
Objective-C
Java
C++

public delegate bool FormProgressCallback( 
   int currentPage,
   int totalPages,
   int percentage
)

'Declaration
 
Public Delegate Function FormProgressCallback( _
   ByVal currentPage As Integer, _
   ByVal totalPages As Integer, _
   ByVal percentage As Integer _
) As Boolean

'Usage
 
Dim instance As New FormProgressCallback(AddressOf HandlerMethod)

public delegate bool FormProgressCallback( 
   int currentPage,
   int totalPages,
   int percentage
)

Parameters

currentPage: The 1-based index of the current page.
totalPages: The total number of pages.
percentage: A value between 0 and 100 that represents the percent completion of the process.

Return Value

true to continue the process, false to cancel the process.

This example compares a Master Form attribute with a Form attributes.

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

Copy Code

Imports Leadtools.Forms
Imports Leadtools.Forms.Recognition

Public Function ProgressCallbackExample(ByVal recognitionEngine As FormRecognitionEngine, ByVal master As FormRecognitionAttributes, _
                                        ByVal form As FormRecognitionAttributes) As FormRecognitionResult
   Return recognitionEngine.CompareForm(master, form, AddressOf MyFormProgressCallback, AddressOf MyPageProgressCallback)
End Function
Private Sub MyPageProgressCallback(ByVal data As PageProgressCallbackData)
   If data.Percentage = 0 Then
      Console.WriteLine("--------------------------")
   End If

   Console.WriteLine("Page progress:{0}%", data.Percentage.ToString("000"))
End Sub

Private Function MyFormProgressCallback(ByVal currentPage As Integer, ByVal totalPages As Integer, ByVal percentage As Integer) As Boolean
   If percentage = 0 Then
      Console.WriteLine("--------------------------")
   End If

   Console.WriteLine("Page:{0}/{1} {2}%", currentPage.ToString("00"), totalPages.ToString("00"), percentage.ToString("000"))

   Return False
End Function

using Leadtools.Forms;
using Leadtools.Forms.Recognition;
using Leadtools.Forms.Ocr;
using Leadtools.Forms.Processing;
using Leadtools.Forms.Recognition.Barcode;
using Leadtools.Forms.Recognition.Ocr;

// Text writer to save the log to 
public FormRecognitionResult ProgressCallbackExample(FormRecognitionEngine recognitionEngine,
                                                     FormRecognitionAttributes master,
                                                     FormRecognitionAttributes form)
{
   return recognitionEngine.CompareForm(master, form, MyFormProgressCallback, MyPageProgressCallback);
}
private void MyPageProgressCallback(PageProgressCallbackData data)
{
   if (data.Percentage == 0)
      Console.WriteLine("--------------------------");

   Console.WriteLine("Page progress:{0}%", data.Percentage.ToString("000"));
}

private bool MyFormProgressCallback(int currentPage, int totalPages, int percentage)
{
   if (percentage == 0)
      Console.WriteLine("--------------------------");

   Console.WriteLine("Page:{0}/{1} {2}%",
      currentPage.ToString("00"),
      totalPages.ToString("00"),
      percentage.ToString("000"));

   return false;
}

Target Platforms

Reference

FormProgressCallback Members
Leadtools.Forms Namespace