ConvertPoint(ImageViewerItem,ImageViewerCoordinateType,ImageViewerCoordinateType,LeadPointD) Method

Summary

Converts a LeadPointD from one coordinates to the other.

Syntax

C++/CLI

public virtual LeadPointD ConvertPoint( 
   ImageViewerItem item, 
   ImageViewerCoordinateType fromType, 
   ImageViewerCoordinateType toType, 
   LeadPointD point 
)

public:  
   virtual LeadPointD^ ConvertPoint( 
      ImageViewerItem^ item, 
      ImageViewerCoordinateType^ fromType, 
      ImageViewerCoordinateType^ toType, 
      LeadPointD^ point 
   )

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

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 ImageViewerItemTransformExample() 
{ 
   // Get the Form's ImageViewer control 
   _imageViewer = _form.ImageViewer; 
 
   // Load an image 
   using (var codecs = new RasterCodecs()) 
      _imageViewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")); 
 
   int dy = 1; 
   LeadPoint position = LeadPoint.Create(0, 0); 
 
   double total = _imageViewer.GetItemViewBounds(_imageViewer.ActiveItem, ImageViewerItemPart.Item, false).Height; 
   double factor; 
 
   LeadPointD[] points = new LeadPointD[2]; 
   points[0] = LeadPointD.Create(position.X, position.Y); 
   points[1] = LeadPointD.Create(position.X * .5, position.Y * .5); 
 
   LeadRect rect = new LeadRect(position.X, position.Y, _imageViewer.Height, _imageViewer.Width); 
 
   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); 
   Debug.WriteLine(origin.X.ToString() + " " + origin.Y.ToString()); 
 
   _imageViewer.ConvertPoints(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, points); 
   _imageViewer.ConvertRect(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, rect); 
   _imageViewer.GetItemContentTransform(_imageViewer.ActiveItem); 
   _imageViewer.GetItemImageTransform(_imageViewer.ActiveItem); 
   _imageViewer.GetItemTransform(_imageViewer.ActiveItem); 
   Debug.WriteLine(_imageViewer.ImageTransform); 
 
   var transform = LeadMatrix.Identity; 
   transform.ScaleAt(1 / factor, 1 / factor, origin.X, origin.Y); 
   _imageViewer.ActiveItem.Transform = LeadMatrix.Multiply(_imageViewer.ActiveItem.Transform, transform); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

ImageViewer Class

ImageViewer Members

Leadtools.Controls Namespace

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Help Version 23.0.2024.2.29