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RasterImageViewer Class

Summary

Represents a scrollable control that displays a LEADTOOLS Leadtools.RasterImage in WPF/Silverlight with interactive UI operations.

Syntax

C++

public class RasterImageViewer : Leadtools.Windows.Controls.ImageViewer, System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

Public Class RasterImageViewer  
   Inherits Leadtools.Windows.Controls.ImageViewer 
   Implements System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

public ref class RasterImageViewer : public Leadtools.Windows.Controls.ImageViewer, System.ComponentModel.ISupportInitialize, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

Remarks

The RasterImageViewer class derives from ImageViewer and adds functionality to display a LEADTOOLS Leadtools.RasterImage object in WPF/Silverlight applications. To display a System.Windows.Media.ImageSource or one of its derived classes, use the ImageViewer control.

In addition to all the features supported by the ImageViewer class, RasterImageViewer adds the following:

Viewing a LEADTOOLS Leadtools.RasterImage object in WPF/Silverlight applications using the Image property.
In WPF/Silverlight, an image that is displayed must be an System.Windows.Media.ImageSource or one of its derived classes, the RasterImageViewer control keeps the ImageViewer.Source property synchronized with RasterImageViewer.Image, any changes that occur to the LEADTOOLS Leadtools.RasterImage is reflected in the Source property and a standard System.Windows.FrameworkPropertyMetadata.AffectsMeasure or System.Windows.FrameworkPropertyMetadata.AffectsRender is performed. Also, this control will subscribe to the RasterImage.Changed to monitor any changes that may occur to the image (through image processing for example) and reflect these changes to the Source property.
If the Source property is changed, the RasterImageViewer must be informed so it can reflect the changes into the Image object. The UpdateImageFromSource can be used to perform this task.

Example

Silverlight C#

Silverlight VB

Imports Leadtools.Windows.Controls 
Imports Leadtools.ImageProcessing 
Imports Leadtools.Codecs 
Imports Leadtools 
 
Private Class MyWindow1 : Inherits Window 
   Private theViewer As RasterImageViewer 
   Public Sub New() 
      ' Create the viewer 
      theViewer = New RasterImageViewer() 
 
      ' Create Dock Panel 
 
      Dim panel As DockPanel = New DockPanel() 
      Content = panel 
 
      DockPanel.SetDock(theViewer, Dock.Bottom) 
 
      theViewer.HorizontalAlignment = HorizontalAlignment.Center 
      theViewer.VerticalAlignment = VerticalAlignment.Bottom 
      theViewer.UseDpi = True 
 
      panel.Children.Add(theViewer) 
 
      ' Load an image into the viewer 
 
      Using codecs As RasterCodecs = New RasterCodecs() 
         theViewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"), 1, CodecsLoadByteOrder.Bgr, 1, 1) 
      End Using 
 
      Dim flip As FlipCommand = New FlipCommand() 
      flip.Run(theViewer.Image) 
 
      Title = String.Format("Size mode = {0}, double click to change", theViewer.SizeMode) 
 
      AddHandler theViewer.MouseDoubleClick, AddressOf theViewer_MouseDoubleClick 
   End Sub 
 
   Private Sub theViewer_MouseDoubleClick(ByVal sender As Object, ByVal e As MouseButtonEventArgs) 
      Select Case theViewer.SizeMode 
         Case SizeMode.Normal 
            theViewer.SizeMode = SizeMode.Stretch 
 
         Case SizeMode.Stretch 
            theViewer.SizeMode = SizeMode.Fit 
 
         Case SizeMode.Fit 
            theViewer.SizeMode = SizeMode.FitAlways 
 
         Case SizeMode.FitAlways 
            theViewer.SizeMode = SizeMode.FitWidth 
 
         Case SizeMode.FitWidth 
            theViewer.SizeMode = SizeMode.Normal 
      End Select 
 
      Title = String.Format("Size mode = {0}, double click to change", theViewer.SizeMode) 
 
   End Sub 
End Class 
 
Public NotInheritable Class LEAD_VARS 
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

using Leadtools.Help; 
using Leadtools.Windows.Controls; 
using Leadtools.ImageProcessing; 
using Leadtools.Codecs; 
 
class MyWindow1 : Window 
{ 
   RasterImageViewer theViewer; 
   public MyWindow1() 
   { 
      // Create the viewer 
      theViewer = new RasterImageViewer(); 
 
      // Create Dock Panel 
 
      DockPanel panel = new DockPanel(); 
      Content = panel; 
 
      DockPanel.SetDock(theViewer, Dock.Bottom); 
 
      theViewer.HorizontalAlignment = HorizontalAlignment.Center; 
      theViewer.VerticalAlignment = VerticalAlignment.Bottom; 
      theViewer.UseDpi = true; 
 
      panel.Children.Add(theViewer); 
 
      // Load an image into the viewer 
 
      using (RasterCodecs codecs = new RasterCodecs()) 
      { 
         theViewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"), 1, Leadtools.Codecs.CodecsLoadByteOrder.Bgr, 1, 1); 
      } 
 
      FlipCommand flip = new FlipCommand(); 
      flip.Run(theViewer.Image); 
 
      Title = string.Format("Size mode = {0}, double click to change", theViewer.SizeMode); 
 
      theViewer.MouseDoubleClick += new MouseButtonEventHandler(theViewer_MouseDoubleClick); 
   } 
 
   void theViewer_MouseDoubleClick(object sender, MouseButtonEventArgs e) 
   { 
      switch (theViewer.SizeMode) 
      { 
         case SizeMode.Normal: 
            theViewer.SizeMode = SizeMode.Stretch; 
            break; 
 
         case SizeMode.Stretch: 
            theViewer.SizeMode = SizeMode.Fit; 
            break; 
 
         case SizeMode.Fit: 
            theViewer.SizeMode = SizeMode.FitAlways; 
            break; 
 
         case SizeMode.FitAlways: 
            theViewer.SizeMode = SizeMode.FitWidth; 
            break; 
 
         case SizeMode.FitWidth: 
            theViewer.SizeMode = SizeMode.Normal; 
            break; 
      } 
 
      Title = string.Format("Size mode = {0}, double click to change", theViewer.SizeMode); 
 
   } 
} 
 
static class LEAD_VARS 
{ 
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

using Leadtools.Help; 
using Leadtools.Windows.Controls; 
using Leadtools.ImageProcessing; 
using Leadtools.Codecs; 
 
class MyWindow1 : ChildWindow 
{ 
   RasterImageViewer theViewer; 
   public MyWindow1() 
   { 
      // Create the viewer 
      theViewer = new RasterImageViewer(); 
 
      // Create Dock Panel 
 
      StackPanel panel = new StackPanel(); 
      Content = panel; 
 
      theViewer.HorizontalAlignment = HorizontalAlignment.Center; 
      theViewer.VerticalAlignment = VerticalAlignment.Bottom; 
      theViewer.UseDpi = true; 
 
      panel.Children.Add(theViewer); 
 
      // Load an image into the viewer 
 
      RasterCodecs codecs = new RasterCodecs(); 
      theViewer.Image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp", 1, Leadtools.Codecs.CodecsLoadByteOrder.Bgr, 1, 1); 
 
      FlipCommand flip = new FlipCommand(); 
      flip.Run(theViewer.Image); 
 
      Title = string.Format("Size mode = {0}, double click to change", theViewer.SizeMode); 
 
      theViewer.MouseLeftButtonDown += new MouseButtonEventHandler(theViewer_MouseLeftButtonDown); 
   } 
 
   void theViewer_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) 
   { 
      switch (theViewer.SizeMode) 
      { 
         case SizeMode.Normal: 
            theViewer.SizeMode = SizeMode.Stretch; 
            break; 
 
         case SizeMode.Stretch: 
            theViewer.SizeMode = SizeMode.Fit; 
            break; 
 
         case SizeMode.Fit: 
            theViewer.SizeMode = SizeMode.FitAlways; 
            break; 
 
         case SizeMode.FitAlways: 
            theViewer.SizeMode = SizeMode.FitWidth; 
            break; 
 
         case SizeMode.FitWidth: 
            theViewer.SizeMode = SizeMode.Normal; 
            break; 
      } 
 
      Title = string.Format("Size mode = {0}, double click to change", theViewer.SizeMode); 
   } 
}

Imports Leadtools 
Imports Leadtools.Windows.Controls 
Imports Leadtools.ImageProcessing 
Imports Leadtools.Codecs 
 
Private Class MyWindow1 : Inherits ChildWindow 
   Private theViewer As RasterImageViewer 
   Public Sub New() 
      ' Create the viewer 
      theViewer = New RasterImageViewer() 
 
      ' Create Dock Panel 
 
      Dim panel As StackPanel = New StackPanel() 
      Content = panel 
 
      theViewer.HorizontalAlignment = HorizontalAlignment.Center 
      theViewer.VerticalAlignment = VerticalAlignment.Bottom 
      theViewer.UseDpi = True 
 
      panel.Children.Add(theViewer) 
 
      ' Load an image into the viewer 
 
      Dim codecs As RasterCodecs = New RasterCodecs() 
      theViewer.Image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path & "Image1.cmp", 1, CodecsLoadByteOrder.Bgr, 1, 1) 
 
      Dim flip As FlipCommand = New FlipCommand() 
      flip.Run(theViewer.Image) 
 
      Title = String.Format("Size mode = {0}, double click to change", theViewer.SizeMode) 
 
      AddHandler theViewer.MouseLeftButtonDown, AddressOf theViewer_MouseLeftButtonDown 
   End Sub 
 
   Private Sub theViewer_MouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs) 
      Select Case theViewer.SizeMode 
         Case SizeMode.Normal 
            theViewer.SizeMode = SizeMode.Stretch 
 
         Case SizeMode.Stretch 
            theViewer.SizeMode = SizeMode.Fit 
 
         Case SizeMode.Fit 
            theViewer.SizeMode = SizeMode.FitAlways 
 
         Case SizeMode.FitAlways 
            theViewer.SizeMode = SizeMode.FitWidth 
 
         Case SizeMode.FitWidth 
            theViewer.SizeMode = SizeMode.Normal 
      End Select 
 
      Title = String.Format("Size mode = {0}, double click to change", theViewer.SizeMode) 
   End Sub 
End Class

<Window x:Class="WPFSamples.RasterImageViewer" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:Leadtools_Windows_Controls="clr-namespace:Leadtools.Windows.Controls;assembly=Leadtools.Windows.Controls" 
    Height="600" Width="800"> 
  <DockPanel> 
    <Leadtools_Windows_Controls:RasterImageViewer 
                Name="theViewer" 
                Image="file:///c:\users\Public\Documents\LEADTOOLS Images\Image1.cmp" 
                DockPanel.Dock= "Bottom" 
                HorizontalAlignment="Center" VerticalAlignment="Bottom" 
                UseDpi="false" 
                    /> 
  </DockPanel> 
  <Window.Title> 
    "RasterImageViewer" 
  </Window.Title> 
</Window>