带键盘的Patagames PDFium滚动

Question

我有点需要帮助。我正在尝试使用键盘在Patagames PDFium .net控件中滚动PDF。不幸的是，我不能让它正确地滚动，我正在寻找一些示例代码(VB或C#)来滚动'line wize (假设每个按键10个像素)‘和'page wize’。有人能帮我吗？经常提提亚。Ole

Answer 1

不要紧。找到答案了。

   Private Sub PdfViewer1_KeyDown(sender As Object, e As KeyEventArgs) Handles PdfViewer1.KeyDown

      Dim pageStep As Integer = PdfViewer1.AutoScrollMinSize.Height / PdfViewer1.Document.Pages.Count
      Dim lineStep As Integer = pageStep / 30
      Dim asp As Point = PdfViewer1.AutoScrollPosition


      Select Case e.KeyCode
         Case Keys.Up
            PdfViewer1.AutoScrollPosition = New Point(asp.X, -asp.Y - lineStep)
         Case Keys.Down
            PdfViewer1.AutoScrollPosition = New Point(asp.X, -asp.Y + lineStep)
         Case Keys.PageUp
            PdfViewer1.AutoScrollPosition = New Point(asp.X, -asp.Y - pageStep)
         Case Keys.PageDown
            PdfViewer1.AutoScrollPosition = New Point(asp.X, -asp.Y + pageStep)
      End Select

   End Sub