LEADTOOLS WPF and Silverlight (Leadtools.Windows.Controls assembly)
LEAD Technologies, Inc

SizeMode Property (ImageViewer)

Example 





Leadtools.Windows.Controls Namespace > ImageViewer Class : SizeMode Property
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. .NET support Silverlight support
Syntax
public SizeMode SizeMode {get; set;}
'Declaration
 
Public Property SizeMode As SizeMode
'Usage
 
Dim instance As ImageViewer
Dim value As SizeMode
 
instance.SizeMode = value
 
value = instance.SizeMode
public SizeMode SizeMode {get; set;}
 get_SizeMode();
 set_SizeMode(value);  
public:
property SizeMode SizeMode {
   SizeMode get();
   void set (    SizeMode value);
}

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
Copy CodeCopy Code   
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
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";
}
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);
   }
}
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>
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

ImageViewer Class
ImageViewer Members

 

 

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