Create screenshot and save to Windows clipboard

'NXJournaling.com
'August 11, 2015
 
'Export a screenshot from NX with a white background
'place the image data on the Windows clipboard so you can immediately
'"paste" the image to a new location (email, powerpoint, etc).
'This version will crop the image and provide a user supplied amount of "whitespace" on each side of the image.
 
Option Strict Off
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports NXOpen
Imports NXOpen.UF
 
Module Module2
 
    Dim theSession As Session = Session.GetSession()
    Dim theUfSession As UFSession = UFSession.GetUFSession()
 
    Sub Main()
 
        If IsNothing(theSession.Parts.BaseWork) Then
            'active part required
            Return
        End If
 
        Dim lw As ListingWindow = theSession.ListingWindow
        lw.Open()
 
        Dim tempScreenshot As String
        Dim tempLocation As String = IO.Path.GetTempPath
 
        tempScreenshot = IO.Path.Combine(tempLocation, "NXscreenshot.png")
 
        Try
            ExportScreenshot(tempScreenshot)
        Catch ex As Exception
            lw.WriteLine("Error: " & ex.Message)
            Return
        End Try
 
        'crop the screenshot (filename, amount of whitespace on each side of image [integer value, number of pixels])
        CropScreenshot(tempScreenshot, 5)
 
        'copy image to clipboard
        Dim theImage As Bitmap = CType(Image.FromFile(tempScreenshot), Bitmap)
        Clipboard.SetImage(theImage)
 
 
        lw.Close()
 
    End Sub
 
    Sub ExportScreenshot(ByVal filename As String)
 
        'save user preference for visibility of WCS, triad, view name, and view border
        Dim wcsVisible As Boolean = theSession.Parts.BaseDisplay.WCS.Visibility
        Dim triadVisible As Integer = theSession.Preferences.ScreenVisualization.TriadVisibility
        Dim displayModelViewNames As Boolean = theSession.Parts.BaseDisplay.Preferences.NamesBorderVisualization.ShowModelViewNames
        Dim displayModelViewBorders As Boolean = theSession.Parts.BaseDisplay.Preferences.NamesBorderVisualization.ShowModelViewBorders
 
        'turn off the WCS, triad, view name, and view border
        theSession.Parts.BaseDisplay.WCS.Visibility = False
        theSession.Preferences.ScreenVisualization.TriadVisibility = 0
        theSession.Parts.BaseDisplay.Preferences.NamesBorderVisualization.ShowModelViewBorders = False
        theSession.Parts.BaseDisplay.Preferences.NamesBorderVisualization.ShowModelViewNames = False
 
        Try
            theUfSession.Disp.CreateImage(filename, UFDisp.ImageFormat.Png, UFDisp.BackgroundColor.White)
        Catch ex As Exception
            MsgBox(ex.Message & ControlChars.NewLine & _
                   "'" & filename & "' could not be created")
            Throw New Exception("Screenshot could not be created")
        Finally
            'reset visibility of WCS, triad, view name, and view border to user's preference
            theSession.Parts.BaseDisplay.WCS.Visibility = wcsVisible
            theSession.Preferences.ScreenVisualization.TriadVisibility = triadVisible
            theSession.Parts.BaseDisplay.Preferences.NamesBorderVisualization.ShowModelViewBorders = displayModelViewBorders
            theSession.Parts.BaseDisplay.Preferences.NamesBorderVisualization.ShowModelViewNames = displayModelViewNames
        End Try
 
    End Sub
 
    Sub CropScreenshot(ByVal theImageFile As String, ByVal borderWidth As Integer)
 
        'borderWidth = whitespace to leave around the border of the image
 
        Dim original As New Bitmap(theImageFile)
 
        Dim JPGminX As Integer = original.Width
        Dim JPGminY As Integer = original.Height
        Dim JPGmaxX As Integer = 0
        Dim JPGmaxY As Integer = 0
 
        Dim bckgrndColor As Color = Color.White
 
        For y As Integer = 0 To original.Height - 1
            For x As Integer = 0 To original.Width - 1
                If original.GetPixel(x, y).ToArgb <> bckgrndColor.ToArgb Then
                    If x < JPGminX Then
                        JPGminX = x
                    ElseIf x > JPGmaxX Then
                        JPGmaxX = x
                    End If
                    If y < JPGminY Then
                        JPGminY = y
                    ElseIf y > JPGmaxY Then
                        JPGmaxY = y
                    End If
                End If
            Next
        Next
        Dim rect As New Rectangle(JPGminX, JPGminY, JPGmaxX - JPGminX, JPGmaxY - JPGminY)
 
        Dim cropped As Bitmap = original.Clone(rect, original.PixelFormat)
 
        'create new image sized to add border around cropped image
        Dim border As New Bitmap(cropped.Width + (2 * borderWidth), cropped.Height + (2 * borderWidth), cropped.PixelFormat)
 
        'create a new graphics object
        Dim g As Graphics = Graphics.FromImage(border)
 
        'fill the graphics object with white color (for background)
        Using myBrush As Brush = New SolidBrush(Color.White)
            g.FillRectangle(myBrush, 0, 0, border.Width, border.Height)
        End Using
 
        'calculate position to place cropped image onto background image
        Dim xImage As Integer = border.Width - cropped.Width - borderWidth
        Dim yImage As Integer = border.Height - cropped.Height - borderWidth
 
        'draw cropped image onto white background
        g.CompositingMode = Drawing2D.CompositingMode.SourceOver
        g.DrawImage(cropped, New Drawing.Point(xImage, yImage))
 
        'dispose of unneeded graphics objects
        original.Dispose()
        cropped.Dispose()
        g.Dispose()
 
        'save our finished graphics file
        border.Save(theImageFile, Imaging.ImageFormat.Png)
 
    End Sub
 
    Public Function GetUnloadOption(ByVal dummy As String) As Integer
 
        'Unloads the image immediately after execution within NX
        GetUnloadOption = NXOpen.Session.LibraryUnloadOption.Immediately
 
    End Function
 
End Module