Converts an array of LeadPoint from one coordinates to the other.
public virtual void ConvertPoints(
ImageViewerItem item,
ImageViewerCoordinateType fromType,
ImageViewerCoordinateType toType,
LeadPoint[] points
)
public:
virtual void ConvertPoints(
ImageViewerItem^ item,
ImageViewerCoordinateType^ fromType,
ImageViewerCoordinateType^ toType,
array<LeadPoint^>^ points
)
item
The reference item. This value can be null.
fromType
Original coordinates of points.
toType
Desired target coordinates.
points
Array of points to convert.
For information on the various conversion types, refer to ConvertPoints.
For more information refer to Image Viewer Layouts, Image Viewer Appearance, Image Viewer Items, 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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