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Transform Property (ImageViewerItem)

Summary

Transformation of the item.

Syntax

C++

public LeadMatrix Transform { get; set; }

Public Property Transform() As LeadMatrix 
   Get 
   Set

public:  
   property LeadMatrix^ Transform 
   { 
      LeadMatrix^ get() 
      void set(LeadMatrix^ value) 
   }

Property Value

The transformation of the item. Default value is Identity.

Remarks

Transform will be used by ViewLayout during the calculation. The rectangle from 0,0 to ImageSize is multiplied by this value apply custom translation, scale and rotation on the item.

Modifying the state values will update this matrix automatically and setting the value of Transform manually will reset the state values to their default values. For more information, for more information, refer Image Viewer Transformation.

For more information, refer Image Viewer Items.

Example

using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using LeadtoolsExamples.Common; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
public void ImageViewerTransform_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); 
}

Imports Leadtools 
Imports Leadtools.Controls 
Imports Leadtools.Codecs 
Imports Leadtools.Drawing 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Color 
Imports LeadtoolsControlsExamples.LeadtoolsExamples.Common 
 
Public Sub ImageViewerTransform_Example(ByVal dy As Integer, ByVal position As LeadPoint) 
   Dim total As Double = _imageViewer.GetItemViewBounds(_imageViewer.ActiveItem, ImageViewerItemPart.Item, False).Height 
   Dim factor As Double 
 
   If total > 0 Then 
      factor = 1.0 - (dy * 2.0) / total 
   Else 
      factor = 1.0 
   End If 
 
   ' Get the origin in image coordinate 
   Dim origin As LeadPointD = _imageViewer.ConvertPoint(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, 
                                                        ImageViewerCoordinateType.Image, position).ToLeadPointD() 
   ' Convert it to whatever the current transform is 
   origin = _imageViewer.ActiveItem.Transform.Transform(origin) 
 
   Dim transform As LeadMatrix = LeadMatrix.Identity 
   transform.ScaleAt(1 / factor, 1 / factor, origin.X, origin.Y) 
   _imageViewer.ActiveItem.Transform = LeadMatrix.Multiply(_imageViewer.ActiveItem.Transform, transform) 
End Sub

Requirements

Target Platforms

Reference

ImageViewerItem Class

ImageViewerItem Members

Leadtools.Controls Namespace