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RasterMagnifyGlass Class

Summary

Represents a Leadtools MagnifyGlass control for "zooming in" a portion of an image.

Syntax

C++/CLI

C++

public class RasterMagnifyGlass

public ref class RasterMagnifyGlass

public: 
   ref class RasterMagnifyGlass

Remarks

The RasterMagnifyGlass is used to "zoom in" a portion of an image displayed in RasterImageViewer control. When a user clicks inside the RasterImageViewer control associated with the RasterMagnifyGlass control, the portion of the image around the mouse cursor will be zoomed in. When a user clicks inside the RasterImageViewer control and moves the mouse, while holding down the button, the zoomed in portion will change according to the mouse pointer position on the bitmap.

Example

This example changes various properties of the magnifying glass.

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
 
private void magnifyGlass_CrosshairChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("Crosshair Changed to " + magnifyGlass.Crosshair.ToString()); 
} 
 
private void magnifyGlass_CrosshairColorChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("CrosshairColor Changed to " + magnifyGlass.CrosshairColor.ToString()); 
} 
 
private void magnifyGlass_CrosshairWidthChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("CrosshairWidth Changed to " + magnifyGlass.CrosshairWidth.ToString()); 
} 
 
private void magnifyGlass_Border3DStyleChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("Border3DStyle Changed to " + magnifyGlass.Border3DStyle.ToString()); 
} 
 
private void magnifyGlass_BorderColorChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("BorderColor Changed to " + magnifyGlass.BorderColor.ToString()); 
} 
 
private void magnifyGlass_BorderWidthChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("BorderWidth Changed to " + magnifyGlass.BorderWidth.ToString()); 
} 
 
private void magnifyGlass_ShapeChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("Shape Changed to " + magnifyGlass.Shape.ToString()); 
} 
 
private void magnifyGlass_SizeChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("Size Changed to " + magnifyGlass.Size.ToString()); 
} 
 
private void magnifyGlass_ScaleFactorChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("Scale Factor Changed to " + magnifyGlass.ScaleFactor.ToString()); 
} 
 
private void magnifyGlass_RoundRectangleEllipseSizeChanged(object sender, EventArgs e) 
{ 
   RasterMagnifyGlass magnifyGlass = sender as RasterMagnifyGlass; 
   Console.WriteLine("RoundRectangleEllipseSize Changed to " + magnifyGlass.RoundRectangleEllipseSize.ToString()); 
} 
 
public void RasterMagnifyGlass_Border3DStyle(RasterImageViewer viewer) 
{ 
   viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass; 
   viewer.MagnifyGlass.CrosshairChanged += new EventHandler(magnifyGlass_CrosshairChanged); 
   viewer.MagnifyGlass.CrosshairColorChanged += new EventHandler(magnifyGlass_CrosshairColorChanged); 
   viewer.MagnifyGlass.CrosshairWidthChanged += new EventHandler(magnifyGlass_CrosshairWidthChanged); 
   viewer.MagnifyGlass.Border3DStyleChanged += new EventHandler(magnifyGlass_Border3DStyleChanged); 
   viewer.MagnifyGlass.BorderColorChanged += new EventHandler(magnifyGlass_BorderColorChanged); 
   viewer.MagnifyGlass.BorderWidthChanged += new EventHandler(magnifyGlass_BorderWidthChanged); 
   viewer.MagnifyGlass.ShapeChanged += new EventHandler(magnifyGlass_ShapeChanged); 
   viewer.MagnifyGlass.SizeChanged += new EventHandler(magnifyGlass_SizeChanged); 
   viewer.MagnifyGlass.ScaleFactorChanged += new EventHandler(magnifyGlass_ScaleFactorChanged); 
   viewer.MagnifyGlass.RoundRectangleEllipseSizeChanged += new EventHandler(magnifyGlass_RoundRectangleEllipseSizeChanged); 
 
   if (viewer.MagnifyGlass.Shape != RasterMagnifyGlassShape.Border3D) 
   { 
      // Set the crosshair style 
      viewer.MagnifyGlass.Shape = RasterMagnifyGlassShape.Border3D; 
      viewer.MagnifyGlass.Border3DStyle = Border3DStyle.Sunken; 
 
      // Now change to a different shape 
      viewer.MagnifyGlass.Shape = RasterMagnifyGlassShape.RoundRectangle; 
      viewer.MagnifyGlass.RoundRectangleEllipseSize = new Size(15, 15); 
      viewer.MagnifyGlass.BorderColor = Color.DarkBlue; 
      viewer.MagnifyGlass.BorderWidth = 10; 
      viewer.MagnifyGlass.Crosshair = RasterMagnifyGlassCrosshair.Fine; 
      viewer.MagnifyGlass.CrosshairColor = Color.Red; 
      viewer.MagnifyGlass.CrosshairWidth = 5; 
      viewer.MagnifyGlass.Size = new Size(200, 100); 
      viewer.MagnifyGlass.ScaleFactor = 1.5f; 
   } 
 
   viewer.MagnifyGlass.CrosshairChanged -= new EventHandler(magnifyGlass_CrosshairChanged); 
   viewer.MagnifyGlass.CrosshairColorChanged -= new EventHandler(magnifyGlass_CrosshairColorChanged); 
   viewer.MagnifyGlass.CrosshairWidthChanged -= new EventHandler(magnifyGlass_CrosshairWidthChanged); 
   viewer.MagnifyGlass.Border3DStyleChanged -= new EventHandler(magnifyGlass_Border3DStyleChanged); 
   viewer.MagnifyGlass.BorderColorChanged -= new EventHandler(magnifyGlass_BorderColorChanged); 
   viewer.MagnifyGlass.BorderWidthChanged -= new EventHandler(magnifyGlass_BorderWidthChanged); 
   viewer.MagnifyGlass.ShapeChanged -= new EventHandler(magnifyGlass_ShapeChanged); 
   viewer.MagnifyGlass.SizeChanged -= new EventHandler(magnifyGlass_SizeChanged); 
   viewer.MagnifyGlass.ScaleFactorChanged -= new EventHandler(magnifyGlass_ScaleFactorChanged); 
   viewer.MagnifyGlass.RoundRectangleEllipseSizeChanged -= new EventHandler(magnifyGlass_RoundRectangleEllipseSizeChanged); 
 
}

Requirements

Target Platforms