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SizeMode Property (ImageViewer)

Summary

Gets or sets a value that determine how the control displays the image and the automatic adjustments of the display. This is a dependency property.

Syntax

C++

public Leadtools.Windows.Controls.SizeMode SizeMode {get; set;}

Public Property SizeMode As Leadtools.Windows.Controls.SizeMode

public: 
property Leadtools.Windows.Controls.SizeMode SizeMode { 
   Leadtools.Windows.Controls.SizeMode get(); 
   void set (    Leadtools.Windows.Controls.SizeMode ); 
}

Property Value

A SizeMode enumeration member value that determines how the control displays the image and the automatic adjustments of the display. Default value is SizeMode.Normal.

Remarks

The control will use the base class FrameworkElement.MeasureOverride to determine how to fit the image in the viewing area.

When using the SizeMode.Normal size mode with; The image size is determined by the image physical pixel width and height and the values of the UseDpi and ScaleFactor properties. The AspectRatioCorrection will also play a role in determining the image size of its value is other than 1. The viewing area size is determined from the current pixel size of the control client area.

When the using the SizeMode.Fit, SizeMode.FitAlways, SizeMode.FitWidth and SizeMode.Stretch size modes; the value of ScaleFactor will always be reset back to 1 and will not be used. Instead, use the read only CurrentXScaleFactor and CurrentYScaleFactor properties to get the actual scale factors used. Note that AspectRatioCorrection will still be used.

Example

Silverlight C#

Silverlight VB

Imports Leadtools.Windows.Controls 
 
Private Class MyWindow1 : Inherits Window 
    Private theViewer As ImageViewer 
    Public Sub New() 
        ' Create the  viewer 
        theViewer = New ImageViewer() 
        ' 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.ImageHorizontalAlignment = HorizontalAlignment.Left 
        theViewer.ImageVerticalAlignment = VerticalAlignment.Top 
        theViewer.UseDpi = True 
        theViewer.ScreenDpiX = 96 
        theViewer.ScreenDpiY = 96 
 
        panel.Children.Add(theViewer) 
 
        ' load an image into the viewer 
        theViewer.Source = New BitmapImage(New Uri(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg"))) 
 
        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; 
 
class MyWindow1 : Window 
{ 
   ImageViewer theViewer; 
   public MyWindow1() 
   { 
      // Create the  viewer 
      theViewer = new ImageViewer(); 
      // Create Dock Panel 
 
      DockPanel panel = new DockPanel(); 
      Content = panel; 
 
      DockPanel.SetDock(theViewer, Dock.Bottom); 
 
      theViewer.HorizontalAlignment= HorizontalAlignment.Center; 
      theViewer.VerticalAlignment= VerticalAlignment.Bottom; 
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left; 
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top; 
      theViewer.UseDpi = true; 
      theViewer.ScreenDpiX = 96; 
      theViewer.ScreenDpiY = 96; 
 
      panel.Children.Add(theViewer); 
 
      // load an image into the viewer 
      theViewer.Source = new BitmapImage(new Uri(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg"))); 
 
      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; 
 
class MyWindow1 : ChildWindow 
{ 
   ImageViewer theViewer; 
   public MyWindow1() 
   { 
      // Create the  viewer 
      theViewer = new ImageViewer(); 
      // Create Dock Panel 
 
      StackPanel panel = new StackPanel(); 
      Content = panel; 
 
      theViewer.HorizontalAlignment= HorizontalAlignment.Center; 
      theViewer.VerticalAlignment= VerticalAlignment.Bottom; 
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left; 
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top; 
      theViewer.UseDpi = true; 
      theViewer.ScreenDpiX = 96; 
      theViewer.ScreenDpiY = 96; 
 
      panel.Children.Add(theViewer); 
 
      // load an image into the viewer 
      theViewer.Source = new BitmapImage(new Uri(LeadtoolsExamples.Common.ImagesPath.Path + "cannon.jpg")); 
 
      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 
 
Private Class MyWindow1 : Inherits ChildWindow 
   Private theViewer As ImageViewer 
   Public Sub New() 
      ' Create the  viewer 
      theViewer = New ImageViewer() 
      ' Create Dock Panel 
 
      Dim panel As StackPanel = New StackPanel() 
      Content = panel 
 
      theViewer.HorizontalAlignment = HorizontalAlignment.Center 
      theViewer.VerticalAlignment = VerticalAlignment.Bottom 
      theViewer.ImageHorizontalAlignment = HorizontalAlignment.Left 
      theViewer.ImageVerticalAlignment = VerticalAlignment.Top 
      theViewer.UseDpi = True 
      theViewer.ScreenDpiX = 96 
      theViewer.ScreenDpiY = 96 
 
      panel.Children.Add(theViewer) 
 
      ' load an image into the viewer 
      theViewer.Source = New BitmapImage(New Uri(LeadtoolsExamples.Common.ImagesPath.Path & "cannon.jpg")) 
 
      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.ImageViewer" 
    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:ImageViewer 
                Name="theViewer" 
                Source="file:///c:\users\Public\Documents\LEADTOOLS Images\cannon.jpg" 
                DockPanel.Dock= "Bottom" 
                HorizontalAlignment="Center" VerticalAlignment="Bottom" 
                UseDpi="false" 
                MouseDoubleClick="theViewer_MouseDoubleClick"/> 
  </DockPanel> 
  <Window.Title> 
    "Size mode =Normal, double click to change" 
  </Window.Title> 
</Window>