Take the following steps to start a project and to add some code that will demonstrate the various interactive modes of the LEADTOOLS Silverlight Control and the Pan Viewer:
[XAML]
<UserControl x:Class="Load_And_Display.MainPage"
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"
Width="800" Height="600">
<Grid x:Name="LayoutRoot" Background="White">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5*"/>
<ColumnDefinition Width="2*"/>
</Grid.ColumnDefinitions>
<ScrollViewer VerticalScrollBarVisibility="Disabled" HorizontalScrollBarVisibility="Disabled" Grid.Column="0">
<StackPanel Orientation="Vertical" >
<Button Name="myButton" Content="Load" FontSize="30" Click="Button_Click" Height="40"></Button>
<Leadtools_Windows_Controls:RasterImageViewer x:Name="viewerControl" SizeMode="Normal" Height="550"></Leadtools_Windows_Controls:RasterImageViewer>
</StackPanel>
</ScrollViewer>
<ScrollViewer VerticalScrollBarVisibility="Disabled" HorizontalScrollBarVisibility="Disabled" Grid.Column="1">
<StackPanel Orientation="Vertical" >
<TextBlock Text="Pan Window :"/>
<Leadtools_Windows_Controls:ImagePanViewer x:Name="_imagePanViewer" Width="150" Height="150" HorizontalAlignment="Left"></Leadtools_Windows_Controls:ImagePanViewer>
<TextBlock Text="Interactive Mode :"/>
<ComboBox Name="_cmbInteractiveMode" SelectedIndex="0" Width="200" HorizontalAlignment="Left" SelectionChanged="ComboBox_SelectionChanged">
<ComboBoxItem Content="None"/>
<ComboBoxItem Content="Pan"/>
<ComboBoxItem Content="Center At"/>
<ComboBoxItem Content="Zoom To"/>
<ComboBoxItem Content="Scale"/>
<ComboBoxItem Content="Magnify Glass"/>
</ComboBox>
</StackPanel>
</ScrollViewer>
</Grid>
</UserControl>
[Visual Basic]
[Visual Basic]
Private Sub ComboBox_SelectionChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)
If _cmbInteractiveMode Is Nothing OrElse _cmbInteractiveMode.SelectedItem Is Nothing Then
Return
End If
Dim item As String = (CType(IIf(TypeOf _cmbInteractiveMode.SelectedItem Is ComboBoxItem, _cmbInteractiveMode.SelectedItem, Nothing), ComboBoxItem)).Content.ToString()
Select Case item
Case "Pan"
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.Pan
Case "Center At"
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.CenterAt
Case "Magnify Glass"
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.MagnifyGlass
Case "Scale"
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.Scale
Case "Zoom To"
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.ZoomTo
Case Else
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.None
End Select
End Sub
[C#]
[C#]
private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (_cmbInteractiveMode == null || _cmbInteractiveMode.SelectedItem == null)
return;
string item = (_cmbInteractiveMode.SelectedItem as ComboBoxItem).Content.ToString();
switch (item)
{
case "Pan":
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.Pan;
break;
case "Center At":
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.CenterAt;
break;
case "Magnify Glass":
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.MagnifyGlass;
break;
case "Scale":
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.Scale;
break;
case "Zoom To":
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.ZoomTo;
break;
default:
viewerControl.InteractiveMode = Leadtools.Windows.Controls.InteractiveMode.None;
break;
}
}
[Visual Basic]
[Visual Basic]
Private Sub Button_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
Try
Dim ofd As OpenFileDialog = New OpenFileDialog()
If ofd.ShowDialog() = True Then
Dim fileStream As FileStream = ofd.File.OpenRead()
Try
Dim codecs As RasterCodecs = New RasterCodecs()
viewerControl.Image = codecs.Load(fileStream)
_imagePanViewer.Source = viewerControl
Finally
fileStream.Dispose()
End Try
End If
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
[C#]
[C#]
private void Button_Click(object sender, RoutedEventArgs e)
{
try
{
OpenFileDialog ofd = new OpenFileDialog();
if (ofd.ShowDialog() == true)
{
using (FileStream fileStream = ofd.File.OpenRead())
{
RasterCodecs codecs = new RasterCodecs();
viewerControl.Image = codecs.Load(fileStream);
_imagePanViewer.Source = viewerControl;
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
Build, and Run the program to test it.
Click the "Load" button, and select an image.
NOTE: if you encounter and "Invalid File Format" or "Feature Not Supported" exception, please refer to the topic Invalid File Format/Feature Not Supported.