FloaterTransform Property (ImageViewerItem)

C#
Visual Basic
Objective-C
Java

public LeadMatrix FloaterTransform {get; set;}

'Declaration

Public Property FloaterTransform As LeadMatrix

Property Value

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

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.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Controls
Imports Leadtools.Codecs
Imports Leadtools.Drawing
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color

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

using Leadtools;
using Leadtools.Controls;
using Leadtools.Codecs;
using Leadtools.Drawing;
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;
}

Target Platforms

Reference

ImageViewerItem Class
ImageViewerItem Members