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RasterMagnifyGlass Class

Summary

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

Syntax

C++

public class RasterMagnifyGlass

Public 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.

Imports Leadtools.WinForms 
Imports Leadtools 
Imports Leadtools.Codecs 
 
Private Sub magnifyGlass_CrosshairChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("Crosshair Changed to " & magnifyGlass.Crosshair.ToString()) 
End Sub 
Private Sub magnifyGlass_CrosshairColorChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("CrosshairColor Changed to " & magnifyGlass.CrosshairColor.ToString()) 
End Sub 
 
Private Sub magnifyGlass_CrosshairWidthChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("CrosshairWidth Changed to " & magnifyGlass.CrosshairWidth.ToString()) 
End Sub 
 
Private Sub magnifyGlass_Border3DStyleChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("Border3DStyle Changed to " & magnifyGlass.Border3DStyle.ToString()) 
End Sub 
 
Private Sub magnifyGlass_BorderColorChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("BorderColor Changed to " & magnifyGlass.BorderColor.ToString()) 
End Sub 
 
Private Sub magnifyGlass_BorderWidthChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("BorderWidth Changed to " & magnifyGlass.BorderWidth.ToString()) 
End Sub 
 
Private Sub magnifyGlass_ShapeChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("Shape Changed to " & magnifyGlass.Shape.ToString()) 
End Sub 
 
Private Sub magnifyGlass_SizeChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("Size Changed to " & magnifyGlass.Size.ToString()) 
End Sub 
 
Private Sub magnifyGlass_ScaleFactorChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("Scale Factor Changed to " & magnifyGlass.ScaleFactor.ToString()) 
End Sub 
 
Private Sub magnifyGlass_RoundRectangleEllipseSizeChanged(ByVal sender As Object, ByVal e As EventArgs) 
   Dim magnifyGlass As RasterMagnifyGlass = CType(IIf(TypeOf sender Is RasterMagnifyGlass, sender, Nothing), RasterMagnifyGlass) 
   Console.WriteLine("RoundRectangleEllipseSize Changed to " & magnifyGlass.RoundRectangleEllipseSize.ToString()) 
End Sub 
 
Public Sub RasterMagnifyGlass_Border3DStyle(ByVal viewer As RasterImageViewer) 
   viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass 
   AddHandler viewer.MagnifyGlass.CrosshairChanged, AddressOf magnifyGlass_CrosshairChanged 
   AddHandler viewer.MagnifyGlass.CrosshairColorChanged, AddressOf magnifyGlass_CrosshairColorChanged 
   AddHandler viewer.MagnifyGlass.CrosshairWidthChanged, AddressOf magnifyGlass_CrosshairWidthChanged 
   AddHandler viewer.MagnifyGlass.Border3DStyleChanged, AddressOf magnifyGlass_Border3DStyleChanged 
   AddHandler viewer.MagnifyGlass.BorderColorChanged, AddressOf magnifyGlass_BorderColorChanged 
   AddHandler viewer.MagnifyGlass.BorderWidthChanged, AddressOf magnifyGlass_BorderWidthChanged 
   AddHandler viewer.MagnifyGlass.ShapeChanged, AddressOf magnifyGlass_ShapeChanged 
   AddHandler viewer.MagnifyGlass.SizeChanged, AddressOf magnifyGlass_SizeChanged 
   AddHandler viewer.MagnifyGlass.ScaleFactorChanged, AddressOf magnifyGlass_ScaleFactorChanged 
   AddHandler viewer.MagnifyGlass.RoundRectangleEllipseSizeChanged, AddressOf magnifyGlass_RoundRectangleEllipseSizeChanged 
 
   If viewer.MagnifyGlass.Shape <> RasterMagnifyGlassShape.Border3D Then 
      ' 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 
   End If 
 
   RemoveHandler viewer.MagnifyGlass.CrosshairChanged, AddressOf magnifyGlass_CrosshairChanged 
   RemoveHandler viewer.MagnifyGlass.CrosshairColorChanged, AddressOf magnifyGlass_CrosshairColorChanged 
   RemoveHandler viewer.MagnifyGlass.CrosshairWidthChanged, AddressOf magnifyGlass_CrosshairWidthChanged 
   RemoveHandler viewer.MagnifyGlass.Border3DStyleChanged, AddressOf magnifyGlass_Border3DStyleChanged 
   RemoveHandler viewer.MagnifyGlass.BorderColorChanged, AddressOf magnifyGlass_BorderColorChanged 
   RemoveHandler viewer.MagnifyGlass.BorderWidthChanged, AddressOf magnifyGlass_BorderWidthChanged 
   RemoveHandler viewer.MagnifyGlass.ShapeChanged, AddressOf magnifyGlass_ShapeChanged 
   RemoveHandler viewer.MagnifyGlass.SizeChanged, AddressOf magnifyGlass_SizeChanged 
   RemoveHandler viewer.MagnifyGlass.ScaleFactorChanged, AddressOf magnifyGlass_ScaleFactorChanged 
   RemoveHandler viewer.MagnifyGlass.RoundRectangleEllipseSizeChanged, AddressOf magnifyGlass_RoundRectangleEllipseSizeChanged 
 
End Sub

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); 
 
}