ImageViewerItemChangedReason Enumeration

Summary

Describes the reason why an item has been changed in the ImageViewer.

Syntax

C++/CLI

public enum ImageViewerItemChangedReason

public enum class ImageViewerItemChangedReason sealed

Members

0	Size	(0) The item size has changed
1	Transform	(1) The item transformation has changed
2	Enabled	(2) The item IsEnabled value has changed
3	Selected	(3) The item IsSelected value has changed
4	Hovered	(4) The item IsHovered value has changed
5	Text	(5) The item Text value has changed
6	Url	(6) The item Url value has changed
7	Drop	(7) The item was the target of a drag/drop and the image data has changed
8	Drag	(8) The item was the source of a move drag/drop operation and the image data has changed
9	Image	(9) The item Image or SvgDocument value has changed.
10	ImageChanged	(10) The item Image has changed. This is when the image itself has changed, for example, the user inverted or flipped the image data.
11	Floater	(11) The item Floater value has changed
12	FloaterTransform	(12) The item FloaterTransform value has changed
13	BackImageUrl	(13) The item BackImageUrl value has changed
14	BackImage	(14) The item BackImage value has changed
15	Visibility	(14) The item IsVisible value has changed

Remarks

For more information, refer to ImageViewer.ItemChanged.

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 ImageViewerItemChangedExample() 
{ 
   // Get the Form's ImageViewer control 
   _imageViewer = _form.ImageViewer; 
 
   // ImageViewerItemChangedEventArgs reference 
   _imageViewer.ItemChanged += (sender, e) => 
   { 
      var item = e.Item; 
      var sb = new StringBuilder(); 
      sb.AppendFormat("ItemChanged:{0} Reason:{1} Size:{2} Res:{3}", _imageViewer.Items.IndexOf(item), e.Reason, item.Size, item.Resolution); 
      if (item.Image != null) 
         sb.AppendFormat(" Image: {0} bpp {1} by {2}", item.Image.BitsPerPixel, item.Image.Width, item.Image.Height); 
      else 
         sb.AppendFormat(" Image: null"); 
      Debug.WriteLine(sb.ToString()); 
 
      if (item.Url != null) 
         Debug.WriteLine("  Url:" + item.Url.ToString()); 
   }; 
 
   // ImageViewerItemErrorEventArgs reference 
   _imageViewer.ItemError += (sender, e) => 
   { 
      e.RemoveEmptyItem = false; 
      Debug.WriteLine("Data: {0}, Error: {1}", e.Data, e.Error); 
   }; 
 
   // Load an image 
   using (var codecs = new RasterCodecs()) 
      _imageViewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

Leadtools.Controls Namespace

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Help Version 23.0.2024.2.29

Leadtools.Controls Assembly

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Leadtools.Controls Namespace

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