''' <summary>
''' A window that allows to load PDF document into image viewer and
''' highlight focused XObject in PDF document.
''' </summary>
Public Partial Class WindowWithWpfPdfContentXObjectTool
    Inherits System.Windows.Window
    '...

    Private _imageViewer As Vintasoft.Imaging.Wpf.UI.WpfImageViewer
    Private _contentXObjectTool As Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectTool



    Public Sub New()
        '...

        ' create an instance of the WpfPdfContentXObjectTool
        _contentXObjectTool = New Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectTool()

        ' set a pen and brush for image selection
        _contentXObjectTool.SelectionImagesBrush = New System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(32, 0, 0, 255))
        _contentXObjectTool.SelectionImagesPen = New System.Windows.Media.Pen(System.Windows.Media.Brushes.Red, 1)
        ' set a pen and brush for form selection
        _contentXObjectTool.SelectionFormsBrush = New System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(32, 0, 255, 0))
        _contentXObjectTool.SelectionFormsPen = New System.Windows.Media.Pen(System.Windows.Media.Brushes.Blue, 1)

        ' subscribe to content XObject tool events
        AddHandler _contentXObjectTool.ContentXObjectMouseEnter, New System.EventHandler(Of Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs)(AddressOf ContentXObjectTool_ContentXObjectMouseEnter)
        AddHandler _contentXObjectTool.ContentXObjectMouseLeave, New System.EventHandler(Of Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs)(AddressOf ContentXObjectTool_ContentXObjectMouseLeave)

        ' set the content XObject tool as current tool
        _imageViewer.VisualTool = _contentXObjectTool
    End Sub



    ''' <summary>
    ''' Occurs when the mouse pointer enters the XObject on PDF page.
    ''' </summary>
    Private Sub ContentXObjectTool_ContentXObjectMouseEnter(sender As Object, e As Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs)
        ' add the focused XObject to the list of focused XObjects
        _contentXObjectTool.SelectedXObjects.Add(e.ContentXObject)
    End Sub

    ''' <summary>
    ''' Occurs when the mouse pointer leaves the XObject on PDF page.
    ''' </summary>
    Private Sub ContentXObjectTool_ContentXObjectMouseLeave(sender As Object, e As Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs)
        ' remove focused XObject from the list of focused XObjects
        _contentXObjectTool.SelectedXObjects.Remove(e.ContentXObject)
    End Sub

End Class

/// <summary>
/// A window that allows to load PDF document into image viewer and
/// highlight focused XObject in PDF document.
/// </summary>
public partial class WindowWithWpfPdfContentXObjectTool : System.Windows.Window
{
    //...

    Vintasoft.Imaging.Wpf.UI.WpfImageViewer _imageViewer;
    Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectTool _contentXObjectTool;
    
    
    
    public WindowWithWpfPdfContentXObjectTool()
    {
        //...

        // create an instance of the WpfPdfContentXObjectTool
        _contentXObjectTool = new Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectTool();

        // set a pen and brush for image selection
        _contentXObjectTool.SelectionImagesBrush = 
            new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(32, 0, 0, 255));
        _contentXObjectTool.SelectionImagesPen = new System.Windows.Media.Pen(System.Windows.Media.Brushes.Red, 1);
        // set a pen and brush for form selection
        _contentXObjectTool.SelectionFormsBrush = 
            new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(32, 0, 255, 0));
        _contentXObjectTool.SelectionFormsPen = new System.Windows.Media.Pen(System.Windows.Media.Brushes.Blue, 1);

        // subscribe to content XObject tool events
        _contentXObjectTool.ContentXObjectMouseEnter +=
            new System.EventHandler<Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs>(ContentXObjectTool_ContentXObjectMouseEnter);
        _contentXObjectTool.ContentXObjectMouseLeave +=
            new System.EventHandler<Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs>(ContentXObjectTool_ContentXObjectMouseLeave);

        // set the content XObject tool as current tool
        _imageViewer.VisualTool = _contentXObjectTool;
    }



    /// <summary>
    /// Occurs when the mouse pointer enters the XObject on PDF page.
    /// </summary>
    private void ContentXObjectTool_ContentXObjectMouseEnter(
        object sender,
        Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs e)
    {
        // add the focused XObject to the list of focused XObjects
        _contentXObjectTool.SelectedXObjects.Add(e.ContentXObject);
    }

    /// <summary>
    /// Occurs when the mouse pointer leaves the XObject on PDF page.
    /// </summary>
    private void ContentXObjectTool_ContentXObjectMouseLeave(
        object sender,
        Vintasoft.Imaging.Pdf.Wpf.UI.WpfPdfContentXObjectEventArgs e)
    {
        // remove focused XObject from the list of focused XObjects
        _contentXObjectTool.SelectedXObjects.Remove(e.ContentXObject);
    }

}