FloaterTransform Property

Summary

Transformation matrix used by the floater image of this item.

Syntax

C++/CLI

public LeadMatrix FloaterTransform { 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 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; 
   } 
}

Requirements

Target Platforms

Reference

ImageViewerItem Class

ImageViewerItem Members

Leadtools.Controls Namespace

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Help Version 22.0.2023.1.24

Leadtools.Controls Assembly

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Leadtools.Controls Namespace

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