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SizeModeChanged Event
See Also  Example
Leadtools.Windows.Controls Namespace > BitmapSourceViewer Class : SizeModeChanged Event





Occurs when the value of the SizeMode property changes.

Syntax

Visual Basic (Declaration) 
Public Event SizeModeChanged() As RoutedPropertyChangedEventHandler(Of PaintSizeMode)
Visual Basic (Usage)Copy Code
Dim instance As BitmapSourceViewer
Dim handler As RoutedPropertyChangedEventHandler(Of PaintSizeMode)
 
AddHandler instance.SizeModeChanged, handler
C# 
public event RoutedPropertyChangedEventHandler<PaintSizeMode> SizeModeChanged()
C++/CLI 
public:
event RoutedPropertyChangedEventHandler<PaintSizeMode> SizeModeChanged();
XAML Attributes Usage 

<object SizeModeChanged=EventHandler<ExceptionRoutedEventArgs>/> ...

Routed Event Information 

Identifier field

SizeModeChangedEvent

Routing strategy

Bubbling

Delegate

EventHandler<(Of <(TEventArgs>)>)

XAML Attributes Usage 

<object SizeModeChanged=EventHandler<ExceptionRoutedEventArgs>/> ...

Routed Event Information 

Identifier field

SizeModeChangedEvent

Routing strategy

Bubbling

Delegate

EventHandler<(Of <(TEventArgs>)>)

Example

This example uses the SizeModeChanged event to show how the SizeMode has changed.

Visual BasicCopy Code
Private Sub viewer_SizeModeChanged(ByVal sender As Object, ByVal e As RoutedPropertyChangedEventArgs(Of PaintSizeMode))
    Dim viewer As BitmapSourceViewer = CType(IIf(TypeOf sender Is BitmapSourceViewer, sender, Nothing), BitmapSourceViewer)
    Dim s As String = String.Format("SizeModeChanged Event: {0}", viewer.SizeMode.ToString())
    MessageBox.Show(s)
End Sub
Public Sub BitmapSourceViewer_SizeModeChanged(ByVal viewer As BitmapSourceViewer)
    AddHandler viewer.SizeModeChanged, AddressOf viewer_SizeModeChanged

    Select Case viewer.SizeMode
        Case PaintSizeMode.Fit
            viewer.SizeMode = PaintSizeMode.FitAlways

        Case PaintSizeMode.FitAlways
            viewer.SizeMode = PaintSizeMode.FitWidth

        Case PaintSizeMode.FitWidth
            viewer.SizeMode = PaintSizeMode.Normal

        Case PaintSizeMode.Normal
            viewer.SizeMode = PaintSizeMode.Stretch

        Case PaintSizeMode.Stretch
            viewer.SizeMode = PaintSizeMode.Fit
    End Select

    RemoveHandler viewer.SizeModeChanged, AddressOf viewer_SizeModeChanged
End Sub
C#Copy Code
private void viewer_SizeModeChanged(object sender, RoutedEventArgs e) 
{ 
   BitmapSourceViewer viewer = sender as BitmapSourceViewer; 
   string s = string.Format("SizeModeChanged Event: {0}", viewer.SizeMode.ToString()); 
   MessageBox.Show(s); 
} 
public void BitmapSourceViewer_SizeModeChanged(BitmapSourceViewer viewer) 
{ 
   viewer.SizeModeChanged += new RoutedPropertyChangedEventHandler<PaintSizeMode>(viewer_SizeModeChanged); 
 
   switch(viewer.SizeMode) 
   { 
      case PaintSizeMode.Fit: 
         viewer.SizeMode = PaintSizeMode.FitAlways; 
         break; 
 
      case PaintSizeMode.FitAlways: 
         viewer.SizeMode = PaintSizeMode.FitWidth; 
         break; 
 
      case PaintSizeMode.FitWidth: 
         viewer.SizeMode = PaintSizeMode.Normal; 
         break; 
 
      case PaintSizeMode.Normal: 
         viewer.SizeMode = PaintSizeMode.Stretch; 
         break; 
 
      case PaintSizeMode.Stretch: 
         viewer.SizeMode = PaintSizeMode.Fit; 
         break; 
   } 
 
   viewer.SizeModeChanged -= new RoutedPropertyChangedEventHandler<PaintSizeMode>(viewer_SizeModeChanged); 
}
XAMLCopy Code
<Window x:Class="WPFSamples.BitmapSourceViewer" Height="600" Width="800" Title="SizeModeChanged Sample" 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"> 
  <DockPanel> 
    <Leadtools_Windows_Controls:BitmapSourceViewer Name="theViewer" Source="file:///C:\Program Files\LEAD Technologies\LEADTOOLS 16\Images\slave.jpg" DockPanel.Dock="Bottom" HorizontalAlignment="Center" VerticalAlignment="Center" SizeMode="Fit" SizeModeChanged="viewer_SizeModeChanged" /> 
  </DockPanel> 
</Window>

Remarks

This event is raised if the SizeMode property is changed by either a programmatic modification or user interaction.

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, and Windows Server 2003 family

See Also