FloaterOpacity Property

Summary

Opacity used when rendering the floaters in this ImageViewer.

Syntax

C++/CLI

public virtual double FloaterOpacity { get; set; }

public:  
   virtual property double FloaterOpacity 
   { 
      double get() 
      void set(double value) 
   }

Property Value

The opacity used when rendering the floaters in this ImageViewer. Must be a value between 0 (transparent or invisible) and 1.0 (fully opaque). Default value is 1.0.

Remarks

Setting this value will automatically update ImageViewerItem.FloaterOpacity of all the items in this viewer to the same value. To change an item value individually, use the item property directly.

For more information, refer to Image Viewer Items and Image Viewer Appearance.

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 ImageViewerFloaterExample() 
{ 
   // 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")); 
 
   ImageViewerItem item = null; 
   RasterImage image = null; 
 
   if (_imageViewer.Items.Count > 0) 
   { 
      item = _imageViewer.Items[0]; 
      image = item.Image; 
   } 
 
   if (image == null) 
   { 
      item.ImageRegionToFloater(); 
      if (item == null) 
         item = _imageViewer.Items.AddFromImage(RasterImage.Create(400, 400, 24, 96, RasterColor.White), 1); 
      else 
         item.Image = RasterImage.Create(400, 400, 24, 96, RasterColor.White); 
   } 
 
   var xForm = RasterRegionXForm.Default; 
   image.AddRectangleToRegion(xForm, new LeadRect(10, 10, 400, 200), RasterRegionCombineMode.Set); 
 
   xForm = RasterRegionXForm.Default; 
   xForm.ViewPerspective = image.ViewPerspective; 
   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; 
      xForm.ViewPerspective = RasterViewPerspective.TopLeft; 
      xForm.XOffset = -rc.Left; 
      xForm.YOffset = -rc.Top; 
      _imageViewer.FloaterOpacity = 1.0; 
   } 
 
   item.CombineFloater(null, true); 
   _imageViewer.CombineFloater(false); 
   image.MakeRegionEmpty(); 
   floater.MakeRegionEmpty(); 
 
   item.Floater = floater; 
   var transform = item.FloaterTransform; 
   transform.RotateAt(45, floater.ImageWidth / 2, floater.ImageHeight / 2); 
 
   item.FloaterTransform = 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

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