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FloaterTransform Property (ImageViewerItem)

Summary

Transformation matrix used by the floater image of this item.

Syntax

C++

public LeadMatrix FloaterTransform { get; set; }

Public Property FloaterTransform() As LeadMatrix 
   Get 
   Set

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

Property Value

The transformation matrix used by the floater image of this item. Default value is Identity.

Remarks

Use this transform to translate, scale or rotate the floater image. ImageViewerFloaterInteractiveMode will update this value when the user clicks and drags on the floater image.

Changing the value of this property will fire the ItemChanged event with ImageViewerItemChangedReason.FloaterTransform.

Example

using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using LeadtoolsExamples.Common; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
var item = _imageViewer.Items[0]; 
if (item == null) 
   return; 
 
if (item.Floater == null) 
{ 
   var xForm = RasterRegionXForm.Default; 
   using (var image = item.Image.Clone()) 
   { 
      var width = image.ImageWidth / 2; 
      var height = image.ImageHeight / 2; 
      image.AddRectangleToRegion(xForm, new LeadRect(width, height, width, height), RasterRegionCombineMode.Set); 
 
      xForm = RasterRegionXForm.Default; 
      xForm.ViewPerspective = RasterViewPerspective.TopLeft; 
      var rc = image.GetRegionBounds(xForm); 
      var command = new CopyRectangleCommand(rc, RasterMemoryFlags.Conventional); 
      command.Run(image); 
      var floater = command.DestinationImage; 
 
      rc = image.RectangleFromImage(RasterViewPerspective.TopLeft, rc); 
 
      if (floater != null) 
      { 
         xForm.ViewPerspective = RasterViewPerspective.TopLeft; 
         var regionData = RasterRegionConverter.GetGdiPlusRegionData(image, xForm); 
         xForm.ViewPerspective = RasterViewPerspective.TopLeft; 
         xForm.XOffset -= rc.Left; 
         xForm.YOffset -= rc.Top; 
      } 
 
      floater.MakeRegionEmpty(); 
 
      var transform = item.FloaterTransform; 
      transform.Translate(-floater.ImageWidth, -floater.ImageHeight); 
      item.FloaterTransform = transform; 
 
      item.Floater = floater; 
   } 
} 
else 
{ 
   var floater = item.Floater; 
 
   var transform = item.FloaterTransform; 
   transform.Translate(-1, -1); 
   item.FloaterTransform = transform; 
}

Imports Leadtools 
Imports Leadtools.Controls 
Imports Leadtools.Codecs 
Imports Leadtools.Drawing 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Color 
Imports LeadtoolsControlsExamples.LeadtoolsExamples.Common 
 
Dim item As ImageViewerItem = _imageViewer.Items(0) 
If item Is Nothing Then 
   Return 
End If 
 
If item.Floater Is Nothing Then 
   Dim xForm As RasterRegionXForm = RasterRegionXForm.Default 
   Using image As RasterImage = item.Image.Clone() 
      Dim width As Integer = image.ImageWidth \ 2 
      Dim height As Integer = image.ImageHeight \ 2 
      image.AddRectangleToRegion(xForm, New LeadRect(width, height, width, height), RasterRegionCombineMode.Set) 
 
      xForm = RasterRegionXForm.Default 
      xForm.ViewPerspective = RasterViewPerspective.TopLeft 
      Dim rc As LeadRect = image.GetRegionBounds(xForm) 
      Dim command As New CopyRectangleCommand(rc, RasterMemoryFlags.Conventional) 
      command.Run(image) 
      Dim floater As RasterImage = command.DestinationImage 
 
      rc = image.RectangleFromImage(RasterViewPerspective.TopLeft, rc) 
 
      If Not floater Is Nothing Then 
         xForm.ViewPerspective = RasterViewPerspective.TopLeft 
         Dim regionData As System.Drawing.Drawing2D.RegionData = RasterRegionConverter.GetGdiPlusRegionData(image, xForm) 
         xForm.ViewPerspective = RasterViewPerspective.TopLeft 
         xForm.XOffset -= rc.Left 
         xForm.YOffset -= rc.Top 
      End If 
 
      floater.MakeRegionEmpty() 
 
      Dim transform As LeadMatrix = item.FloaterTransform 
      transform.Translate(-floater.ImageWidth, -floater.ImageHeight) 
      item.FloaterTransform = transform 
 
      item.Floater = floater 
   End Using 
Else 
   Dim floater As RasterImage = item.Floater 
 
   Dim transform As LeadMatrix = item.FloaterTransform 
   transform.Translate(-1, -1) 
   item.FloaterTransform = transform 
End If