thumbnails for element editor, better colors

EnvelopeGenerator.Form/frmFieldEditor.vb

@@ -48,14 +48,7 @@ Partial Public Class frmFieldEditor
             Throw New ArgumentNullException("GDPictureKey")
         End If
 
-        DocumentViewer1.Init(LogConfig, GDPictureKey)
-        DocumentViewer1.LoadFile(Document.Filepath)
-
-        If DocumentViewer1.PdfViewer IsNot Nothing Then
-            GDViewer = DocumentViewer1.PdfViewer
-            Manager = GDViewer.GetAnnotationManager()
-            Manager.InitFromGdViewer(GDViewer)
-        End If
+        InitializeViewer()
 
         SetReceiver(Receivers.First())
         Dim oItems = Receivers.Select(AddressOf CreateBarItem).ToArray()
@@ -71,6 +64,22 @@ Partial Public Class frmFieldEditor
             Next
             'LoadAnnotations(SelectedReceiver.Id)
             GDViewer.DisplayFirstPage()
+
+            ThumbnailEx2.LoadFromGdViewer(GDViewer)
+            ThumbnailEx2.Refresh()
+        End If
+    End Sub
+
+    Private Sub InitializeViewer()
+        DocumentViewer1.Init(LogConfig, GDPictureKey)
+        DocumentViewer1.LoadFile(Document.Filepath)
+
+        If DocumentViewer1.PdfViewer IsNot Nothing Then
+            GDViewer = DocumentViewer1.PdfViewer
+            Manager = GDViewer.GetAnnotationManager()
+            Manager.InitFromGdViewer(GDViewer)
+        Else
+            Logger.Warn("Viewer could not be initialized!")
         End If
     End Sub