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ConvertPoint(ImageViewerItem,ImageViewerCoordinateType,ImageViewerCoordinateType,LeadPointD) Method

Summary

Converts a LeadPointD from one coordinates to the other.

Syntax
C#
C++
vb[VB Syntax] 
Public Overridable Function ConvertPoint( 
   ByVal _item_ As ImageViewerItem, 
   ByVal _fromType_ As ImageViewerCoordinateType, 
   ByVal _toType_ As ImageViewerCoordinateType, 
   ByVal _point_ As LeadPointD 
) As LeadPointD 

Parameters

item

The reference item. This value can be null.

fromType

Original coordinates of point.

toType

Desired target coordinates.

point

The point to convert.

Return Value

The converted point

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.