ImageViewerItem Class

Summary

Represents an ImageViewer item containing its own image data, size and optional additional transformation.

Syntax

C++/CLI

public class ImageViewerItem

public ref class ImageViewerItem

Remarks

ImageViewer supports one or more items with each containing its own image data, size and optional additional transformation.

ImageViewerItem supports raster image or SVG data.

For more information, refer to Image Viewer Items.

Example

using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
 
public ImageViewerForm _form = new ImageViewerForm(); 
public ImageViewer _imageViewer; 
 
public void ImageViewerItemsExample() 
{ 
   // Get the Form's ImageViewer control 
   _imageViewer = _form.ImageViewer; 
   // Clear all the images already the viewer 
   _imageViewer.Items.Clear(); 
   _imageViewer.BeginUpdate(); 
   // Use vertical view layout 
   _imageViewer.ViewLayout = new ImageViewerVerticalViewLayout(); 
   _imageViewer.ImageBorderThickness = 1; 
 
   // Add 4 items to the viewer 
   using (var codecs = new RasterCodecs()) 
   { 
      for (var page = 1; page <= 4; page++) 
      { 
         var item = new ImageViewerItem(); 
         var fileName = Path.Combine(LEAD_VARS.ImagesDir, string.Format("ocr{0}.tif", page)); 
         item.Image = codecs.Load(fileName, 100, 100, 24, RasterSizeFlags.Resample, CodecsLoadByteOrder.BgrOrGray, page, page); 
         // Set the tag of each item to be the page number 
         item.Tag = page; 
         _imageViewer.Items.Add(item); 
      } 
   } 
 
   // Show the count 
   Debug.WriteLine("Item Count: " + _imageViewer.Items.Count); 
 
   // Remove the item at index 1 (page 2) 
   _imageViewer.Items.RemoveAt(1); 
   Debug.WriteLine("Item Count: " + _imageViewer.Items.Count); 
 
   // Loop through each item and show the tag, since page 2 is removed, it must say 1, 3, 4 
   foreach (var item in _imageViewer.Items) 
   { 
      var pageNumber = (int)item.Tag; 
      Debug.WriteLine(pageNumber.ToString()); 
   } 
   _imageViewer.EndUpdate(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

ImageViewerItem Members

Leadtools.Controls Namespace

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Help Version 23.0.2024.2.29

Leadtools.Controls Assembly

Introduction

Getting Started

Namespaces

Leadtools.Controls Namespace

Assemblies