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ConvertPoints(ImageViewerItem,ImageViewerCoordinateType,ImageViewerCoordinateType,LeadPoint[]) Method

Summary

Converts an array of LeadPoint from one coordinates to the other.

Syntax
C#
C++
vb[VB Syntax] 
Public Overridable Sub ConvertPoints( 
   ByVal _item_ As ImageViewerItem, 
   ByVal _fromType_ As ImageViewerCoordinateType, 
   ByVal _toType_ As ImageViewerCoordinateType, 
   ByVal _points_() As LeadPoint 
) 

Parameters

item

The reference item. This value can be null.

fromType

Original coordinates of points.

toType

Desired target coordinates.

points

Array of points to convert.

Remarks

For information on the various conversion types, refer to ConvertPoints.

For more information refer to Image Viewer Layouts, Image Viewer Appearance, Image Viewer Items, Image Viewer Transformation, and Image Viewer Bounds and Transform.

Example
C#
using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
 
public void ImageViewerItemTransform_Example(int dy, LeadPoint position) 
{ 
   double total = _imageViewer.GetItemViewBounds(_imageViewer.ActiveItem, ImageViewerItemPart.Item, false).Height; 
   double factor; 
 
   if (total > 0) 
      factor = 1.0 - (dy * 2.0) / total; 
   else 
      factor = 1.0; 
 
   // Get the origin in image coordinate 
   var origin = _imageViewer.ConvertPoint(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, position).ToLeadPointD(); 
   // Convert it to whatever the current transform is 
   origin = _imageViewer.ActiveItem.Transform.Transform(origin); 
 
   var transform = LeadMatrix.Identity; 
   transform.ScaleAt(1 / factor, 1 / factor, origin.X, origin.Y); 
   _imageViewer.ActiveItem.Transform = LeadMatrix.Multiply(_imageViewer.ActiveItem.Transform, transform); 
} 
Requirements

Target Platforms

Help Version 22.0.2022.4.4
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Leadtools.Controls Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.