FloaterTransform Property

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; 
 
public void ImageViewerFloaterTransform_Example() 
{ 
   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 
 
Public Sub ImageViewerFloaterTransform_Example() 
 
   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 
End Sub

Requirements

Target Platforms

Reference

ImageViewerItem Class

ImageViewerItem Members

Leadtools.Controls Namespace

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Help Version 20.0.2020.4.3

Leadtools.Controls Assembly

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