Floater Property (ImageViewerItem)

C#
Visual Basic
Objective-C
Java

public RasterImage Floater {get; set;}

'Declaration

Public Property Floater As RasterImage

Property Value

The floater image of this item. Default value is null.

The image viewer supports a floater image that can be dragged with the mouse or touch when ImageViewerFloaterInteractiveMode is used.

The floater outline can be rendered or animated using FloaterRegionRenderMode.

The position, scale and rotation of the floater can be manipulated with the FloaterTransform property.

FloaterOpacity can be used to set any opacity value for the floater from completely transparent to fully opaque and in between.

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

The viewer will subscribe to RasterImage.Changed and automatically perform the necessary updates when the floater image changes externally by other parts of the application.

Floater property of ImageViewer will update this member if this is the active item when the viewer is used in single item mode.

For more information, refer to Image Viewer Items.

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 = Nothing
Dim image As RasterImage = Nothing
If _imageViewer.Items.Count > 0 Then
   item = _imageViewer.Items(0)
   image = item.Image
End If

If image Is Nothing Then
   If item Is Nothing Then
      item = _imageViewer.Items.AddFromImage(RasterImage.Create(400, 400, 24, 96, RasterColor.White), 1)
   Else
      item.Image = RasterImage.Create(400, 400, 24, 96, RasterColor.White)
   End If
End If

Dim xForm As RasterRegionXForm = RasterRegionXForm.Default
image.AddRectangleToRegion(xForm, New LeadRect(10, 10, 400, 200), RasterRegionCombineMode.Set)

xForm = RasterRegionXForm.Default
xForm.ViewPerspective = image.ViewPerspective
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
   xForm.ViewPerspective = RasterViewPerspective.TopLeft
   xForm.XOffset = -rc.Left
   xForm.YOffset = -rc.Top
End If

image.MakeRegionEmpty()
floater.MakeRegionEmpty()

item.Floater = floater
Dim transform As LeadMatrix = item.FloaterTransform
transform.RotateAt(45, floater.ImageWidth / 2, floater.ImageHeight / 2)

item.FloaterTransform = transform

using Leadtools;
using Leadtools.Controls;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;

ImageViewerItem item = null;
RasterImage image = null;
if (_imageViewer.Items.Count > 0)
{
   item = _imageViewer.Items[0];
   image = item.Image;
}

if (image == null)
{
   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;
}

image.MakeRegionEmpty();
floater.MakeRegionEmpty();

item.Floater = floater;
var transform = item.FloaterTransform;
transform.RotateAt(45, floater.ImageWidth / 2, floater.ImageHeight / 2);

item.FloaterTransform = transform;

Target Platforms

Reference

ImageViewerItem Class
ImageViewerItem Members