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Points Property

Summary

Gets a list of the location points.

Syntax
C#
C++/CLI
public IList<LeadPoint> Points { get; } 
public:  
   property System::Collections::Generic::IList<Leadtools::LeadPoint^>^ Points 
   { 
      System::Collections::Generic::IList<Leadtools::LeadPoint^>^ get() 
   } 

Property Value

The list of the location points.

Remarks

Note that if Shape is set to ImageViewerRubberBandShape.FreeHand, then Points can have any number of points including 1. When Shape is any other value, the number of points is always two (the first and second point).

Example
C#
using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
 
public static bool AddRoundRect(GraphicsPath path, LeadRect bounds, int xRadius, int yRadius) 
{ 
   if (bounds.Width < 1 || bounds.Height < 1) 
      return false; 
 
   if (xRadius < 1 || yRadius < 1) 
   { 
      // Add a rectangle 
      path.AddRectangle(new Rectangle(bounds.X, bounds.Y, bounds.Width, bounds.Height)); 
      return true; 
   } 
 
   int x = bounds.X; 
   int y = bounds.Y; 
   int width = bounds.Width; 
   int height = bounds.Height; 
 
   // adapt horizontal and vertical diameter if the rectangle is too little 
   int xDiameter = xRadius * 2; 
   int yDiameter = yRadius * 2; 
   if (width < (xDiameter)) 
      xDiameter = width; 
   if (height < (yDiameter)) 
      yDiameter = height; 
   xRadius = xDiameter / 2; 
   yRadius = yDiameter / 2; 
 
   int xw = x + width; 
   int yh = y + height; 
   int xwr = xw - xRadius; 
   int yhr = yh - yRadius; 
   int xr = x + xRadius; 
   int yr = y + yRadius; 
   int xwr2 = xw - xDiameter; 
   int yhr2 = yh - yDiameter; 
 
   path.StartFigure(); 
 
   path.AddArc(x, y, xDiameter, yDiameter, 180, 90); 
   path.AddLine(xr, y, xwr, y); 
   path.AddArc(xwr2, y, xDiameter, yDiameter, 270, 90); 
   path.AddLine(xw, yr, xw, yhr); 
   path.AddArc(xwr2, yhr2, xDiameter, yDiameter, 0, 90); 
   path.AddLine(xwr, yh, xr, yh); 
   path.AddArc(x, yhr2, xDiameter, yDiameter, 90, 90); 
   path.AddLine(x, yhr, x, yr); 
   path.CloseFigure(); 
 
   return true; 
} 
 
public void ImageViewerRubberBandInteractiveMode_Example() 
{ 
   ImageViewerRubberBandInteractiveMode rubberBandMode = new ImageViewerRubberBandInteractiveMode(); 
 
   foreach (ImageViewerRubberBandShape shape in Enum.GetValues(typeof(ImageViewerRubberBandShape))) 
      _rubberBandShapesComboBox.Items.Add(shape); 
 
   _rubberBandShapesComboBox.SelectedItem = rubberBandMode.Shape; 
 
   _rubberBandShapesComboBox.SelectedIndexChanged += (sender, e) => rubberBandMode.Shape = (ImageViewerRubberBandShape)_rubberBandShapesComboBox.SelectedItem; 
 
   rubberBandMode.RubberBandCompleted += (sender, e) => 
   { 
      if (e.IsCanceled) 
         return; 
 
      if (rubberBandMode.Item == null) 
         return; 
 
      LeadPoint[] points = new LeadPoint[e.Points.Count]; 
      for (var i = 0; i < points.Length; i++) 
         points[i] = LeadPoint.Create(e.Points[i].X, e.Points[i].Y); 
 
      LeadPoint min = LeadPoint.Empty; 
      LeadPoint max = LeadPoint.Empty; 
 
      for (int i = 0; i < points.Length; i++) 
      { 
         points[i] = _imageViewer.ConvertPoint(rubberBandMode.Item, ImageViewerCoordinateType.Control, ImageViewerCoordinateType.Image, points[i]); 
         if (i == 0) 
         { 
            min = points[i]; 
            max = points[i]; 
         } 
         else 
         { 
            min.X = Math.Min(min.X, points[i].X); 
            min.Y = Math.Min(min.Y, points[i].Y); 
            max.X = Math.Max(max.X, points[i].X); 
            max.Y = Math.Max(max.Y, points[i].Y); 
         } 
      } 
 
      LeadPoint center = LeadPoint.Create(min.X + (max.X - min.X) / 2, min.Y + (max.Y - min.Y) / 2); 
 
      ImageViewerItem rasterItem = rubberBandMode.Item; 
      RasterImage image = rasterItem.Image; 
      IntPtr hdc = RasterImagePainter.CreateLeadDC(image); 
      using (Graphics graphics = Graphics.FromHdc(hdc)) 
      { 
         using (GraphicsPath path = new GraphicsPath()) 
         { 
            switch (rubberBandMode.Shape) 
            { 
               case ImageViewerRubberBandShape.Rectangle: 
               case ImageViewerRubberBandShape.Ellipse: 
                  { 
                     LeadRect rect = LeadRect.Normalize(LeadRect.FromLTRB(points[0].X, points[0].Y, points[1].X, points[1].Y)); 
                     Rectangle rc = new Rectangle(rect.X, rect.Y, rect.Width, rect.Height); 
                     if (rubberBandMode.Shape == ImageViewerRubberBandShape.Rectangle) 
                        path.AddRectangle(rc); 
                     else 
                        path.AddEllipse(rc); 
                  } 
                  break; 
 
               case ImageViewerRubberBandShape.RoundRectangle: 
                  { 
                     LeadSize radius = rubberBandMode.RoundRectangleRadius; 
                     LeadRect rect = LeadRect.Normalize(LeadRect.FromLTRB(points[0].X, points[0].Y, points[1].X, points[1].Y)); 
                     AddRoundRect(path, rect, radius.Width, radius.Height); 
                  } 
                  break; 
 
               case ImageViewerRubberBandShape.Freehand: 
                  { 
                     bool firstPoint = true; 
                     LeadPoint lastPoint = LeadPoint.Empty; 
 
                     foreach (LeadPoint pt in points) 
                     { 
                        if (!firstPoint) 
                           path.AddLine(lastPoint.X, lastPoint.Y, pt.X, pt.Y); 
                        else 
                           firstPoint = false; 
 
                        lastPoint = pt; 
                     } 
                  } 
                  break; 
 
               default: 
                  break; 
            } 
 
            path.CloseFigure(); 
 
            if (image.Width > 1000 || image.Height > 1000) 
            { 
               using (Pen pen = new Pen(Color.Yellow, 8)) 
                  graphics.DrawPath(pen, path); 
            } 
            else 
            { 
               graphics.DrawPath(Pens.Yellow, path); 
            } 
         } 
      } 
 
      RasterImagePainter.DeleteLeadDC(hdc); 
      _imageViewer.Invalidate(); 
   }; 
 
   rubberBandMode.AutoItemMode = ImageViewerAutoItemMode.AutoSet; 
   rubberBandMode.ItemPart = ImageViewerItemPart.Image; 
   _imageViewer.InteractiveModes.BeginUpdate(); 
   _imageViewer.InteractiveModes.Add(rubberBandMode); 
   ImageViewerAutoPanInteractiveMode autopan = new ImageViewerAutoPanInteractiveMode(); 
   autopan.PanDelay = 100; 
   _imageViewer.InteractiveModes.Add(autopan); 
   _imageViewer.InteractiveModes.EndUpdate(); 
} 
Requirements

Target Platforms

Help Version 22.0.2023.1.24
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Leadtools.Controls Assembly
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.