Transformation matrix of the whole item.
public LeadMatrix GetItemTransform(
ImageViewerItem item
)
public:
LeadMatrix^ GetItemTransform(
ImageViewerItem^ item
)
item
The reference item, this value cannot be null.
The transformation matrix of the whole item.
GetItemTransform returns the transformation used to render an item in relation to the top-left corner of the viewer control.
For more information refer to Image Viewer Appearance, Image Viewer Transformation, and Image Viewer Bounds and Transform.
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 ImageViewerItemTransformExample()
{
// 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"));
int dy = 1;
LeadPoint position = LeadPoint.Create(0, 0);
double total = _imageViewer.GetItemViewBounds(_imageViewer.ActiveItem, ImageViewerItemPart.Item, false).Height;
double factor;
LeadPointD[] points = new LeadPointD[2];
points[0] = LeadPointD.Create(position.X, position.Y);
points[1] = LeadPointD.Create(position.X * .5, position.Y * .5);
LeadRect rect = new LeadRect(position.X, position.Y, _imageViewer.Height, _imageViewer.Width);
if (total > 0)
factor = 1.0 - (dy * 2.0) / total;
else
factor = 1.0;
// Get the origin in image coordinate
var origin = _imageViewer.ConvertPoint(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, position).ToLeadPointD();
// Convert it to whatever the current transform is
origin = _imageViewer.ActiveItem.Transform.Transform(origin);
Debug.WriteLine(origin.X.ToString() + " " + origin.Y.ToString());
_imageViewer.ConvertPoints(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, points);
_imageViewer.ConvertRect(_imageViewer.ActiveItem, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, rect);
_imageViewer.GetItemContentTransform(_imageViewer.ActiveItem);
_imageViewer.GetItemImageTransform(_imageViewer.ActiveItem);
_imageViewer.GetItemTransform(_imageViewer.ActiveItem);
Debug.WriteLine(_imageViewer.ImageTransform);
var transform = LeadMatrix.Identity;
transform.ScaleAt(1 / factor, 1 / factor, origin.X, origin.Y);
_imageViewer.ActiveItem.Transform = LeadMatrix.Multiply(_imageViewer.ActiveItem.Transform, transform);
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}
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