Imports System.Windows.Forms
Imports System.Drawing


Class ThumbViewer
    Declare Auto Function SetParent Lib "user32.dll" (ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As Integer
    Declare Auto Function SendMessage Lib "user32.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
    Private Const WM_SYSCOMMAND As Integer = 274
    Private Const SC_MAXIMIZE As Integer = 61488

    Private myImageList As System.Windows.Forms.ImageList = New ImageList()
    Private myImageListSmall As System.Windows.Forms.ImageList = New ImageList()
    Private myImageListLarge As System.Windows.Forms.ImageList = New ImageList()
    Private count As Integer = 0
    Private DefaultSplitsize As Integer
    Dim m_data As DataTable
    Dim d As New clsDok

    Property Data As DataTable
        Get
            Return m_data
        End Get
        Set(value As DataTable)

            m_data = value
            Try
                AddImages()
                large_images()
            Catch
            End Try
        End Set
    End Property

    Dim m_previewfilename As String
    Property PreviewFilename As String
        Get
            Return m_previewfilename
        End Get
        Set(value As String)
            m_previewfilename = value
        End Set
    End Property

    Sub New()

        ' Dieser Aufruf ist für den Designer erforderlich.
        InitializeComponent()
        myImageList.ImageSize = New Size(50, 50)
        myImageListSmall.ImageSize = New Size(32, 32)
        myImageListLarge.ImageSize = New Size(80, 80)
        Me.TrackBar1.Minimum = 20
        Me.TrackBar1.Maximum = 256
        Me.TrackBar1.Value = 80
        Me.DefaultSplitsize = Me.SplitContainer1.SplitterDistance

    End Sub
    Public Function AddImage(ByVal imagefile As Object, ByVal name As String, ByVal key As Integer)
        Dim img As System.Drawing.Image
        img = GetImagefromDB(imagefile)
        myImageList.Images.Add(img)
        myImageListSmall.Images.Add(img)
        myImageListLarge.Images.Add(img)
        ListView1.LargeImageList = myImageListLarge
        Dim lvitem As New ListViewItem
        lvitem.ImageIndex = count
        lvitem.Text = name
        lvitem.Tag = key
        ListView1.Items.Add(lvitem)
        count += 1
    End Function

    Public Function AddImages()
        Me.ListView1.Items.Clear()
        For Each r As DataRow In Me.Data.Rows
            Try
                Dim ext As String
                ext = UCase(System.IO.Path.GetExtension(r("pfad")))
                Dim img As System.Drawing.Image
                Select Case ext
                    Case ".PDF"
                        img = Me.ImageList1.Images(0)
                    Case ".MSG"
                        img = Me.ImageList1.Images(3)
                    Case ".DOCX", ".DOCM", ".DOC", ".DOC"
                        img = Me.ImageList1.Images(1)
                    Case ".XLSX", "XLSM", ".XLS", "XLM"
                        img = Me.ImageList1.Images(2)
                    Case ".TIF", ".TIFF", ".JPG", ".PNG", ".BMP"
                        img = GetImagefromDB(r.Item("dokumentfile"))
                    Case Else
                        img = Me.ImageList1.Images(5)
                End Select
                myImageList.Images.Add(img)
                myImageListSmall.Images.Add(img)
                myImageListLarge.Images.Add(img)
                ListView1.LargeImageList = myImageListLarge
                Dim lvitem As New ListViewItem
                lvitem.ImageIndex = count
                lvitem.Text = r.Item("bezeichnung")
                lvitem.Tag = r.Item(0)
                lvitem.ToolTipText = ext
                ListView1.Items.Add(lvitem)
                count += 1
            Catch
            End Try
        Next
    End Function

    Public Function GetImagefromDB(ByVal imgfield As Object) As Image
        Dim IMGC As New ImageConverter
        Dim IMGPIC As Image = CType(IMGC.ConvertFrom(imgfield), Image)
        Return IMGPIC
    End Function

    Dim InitLIst As Boolean = False
    Public Function SearchItem(ByVal Key As Integer)
        Dim i As Integer = 0
        InitLIst = True
        For Each item As ListViewItem In Me.ListView1.Items
            item.Focused = False
            item.Selected = False
        Next
        InitLIst = False
        For Each item As ListViewItem In Me.ListView1.Items
            item.Focused = False
            item.Selected = False

            If item.Tag = Key Then
                item.Focused = True
                item.Selected = True
                'Me.ListView1.Items(i).Focused = True
                'Me.ListView1.Items(i).Selected = True

            End If
            i = i + 1
        Next
    End Function

    Private Sub ListView1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ListView1.SelectedIndexChanged
        If InitLIst Then Exit Sub
        Try
            Dim key As Integer
            key = ListView1.FocusedItem.Tag
            Dim previewfilename As String = ""
            If Globals.PreViewDir = "" Then
                Dim db As New clsDB
                db.Get_Tabledata("dms", "", "Select * from dms_Settings where nreintrag=6")
                Globals.PreViewDir = db.dsDaten.Tables(0).Rows(0).Item(2)
                If Not System.IO.Directory.Exists(Globals.PreViewDir) Then
                    System.IO.Directory.CreateDirectory(Globals.PreViewDir)
                End If
            End If
            Dim txt As String
            txt = ListView1.FocusedItem.ToolTipText
            Select Case txt
                Case ".PDF"
                    previewfilename = d.Get_Dokument(key, Globals.PreViewDir, True, True)
                    Me.KpImageViewer1.Visible = False
                    Me.grpdokumentvorschau.Visible = False
                    Me.grpdokumentvorschaupdf.Visible = True
                    Me.GrpDokumentvorschauMail.Visible = False
                    Me.grpdokumentvorschaupdf.Dock = DockStyle.Fill
                    Try
                        Me.WebBrowser2.Navigate(previewfilename)
                    Catch
                    End Try
                    Me.pdfViewerControl1.RenderingEngine = Syncfusion.Windows.Forms.PdfViewer.PdfRenderingEngine.Pdfium
                    Me.pdfViewerControl1.ReferencePath = Application.StartupPath + ""
                    'Me.pdfViewerControl1.Load(previewfilename)
                    Dim p As System.Diagnostics.Process
                    ''Me.ppdf.Dock = DockStyle.Fill
                    'p = Process.Start(previewfilename)
                    'p.WaitForInputIdle()
                    'SetParent(p.MainWindowHandle, ppdf.Handle)
                    'SendMessage(p.MainWindowHandle, WM_SYSCOMMAND, SC_MAXIMIZE, 0)

                Case ".MSG"
                    Me.KpImageViewer1.Visible = False
                    Me.grpdokumentvorschaupdf.Visible = False
                    Me.grpdokumentvorschau.Visible = False
                    Me.GrpDokumentvorschauMail.Visible = True
                    Me.GrpDokumentvorschauMail.Dock = DockStyle.Fill

                    previewfilename = d.Get_Dokument(key, Globals.PreViewDir, True, True)
                    Dim msgreader As New MsgReader.Reader
                    Dim files = msgreader.ExtractToFolder(previewfilename, Globals.PreViewDir)
                    Dim err = msgreader.GetErrorMessage
                    webBrowser1.Navigate(files(0))
                Case ".TIF", ".TIFF", ".JPG", ".PNG", ".BMP"
                    Me.KpImageViewer1.Visible = True
                    Me.grpdokumentvorschaupdf.Visible = False
                    Me.grpdokumentvorschau.Visible = False
                    Me.GrpDokumentvorschauMail.Visible = False

                    Me.KpImageViewer1.Dock = DockStyle.Fill
                    'Me.KpImageViewer1.DoResize()

                    For Each r As DataRow In Data.Rows
                        If r.Item(0) = key Then
                            Me.KpImageViewer1.Image = GetImagefromDB(r.Item("dokumentfile"))
                        End If
                    Next
                Case Else
                    previewfilename = d.Get_Dokument(key, Globals.PreViewDir, True, True)
                    Me.KpImageViewer1.Visible = False
                    Me.grpdokumentvorschaupdf.Visible = False
                    Me.grpdokumentvorschau.Visible = True
                    Me.GrpDokumentvorschauMail.Visible = False
                    Me.grpdokumentvorschau.Dock = DockStyle.Fill

                    Try
                        'Threading.Thread.CurrentThread.Sleep(1000)
                        Try
                            DocumentViewer1.CloseDocument()
                        Catch
                        End Try
                        Try
                            Me.DocumentViewer1.LoadDocument(previewfilename)
                        Catch
                        End Try

                    Catch es As Gnostice.Core.XDocException
                    End Try
            End Select
        Catch
        End Try

    End Sub

    Private Sub ToolStripButton1_Click(sender As Object, e As EventArgs) Handles ToolStripButton1.Click
        large_images()
        Me.TrackBar1.Visible = True
    End Sub

    Public Sub large_images()

        Dim imglst As New ImageList

        imglst.ImageSize = New Size(Me.TrackBar1.Value, Me.TrackBar1.Value)
        imglst.Images.Clear()

        For n As Int32 = 0 To myImageListLarge.Images.Count - 1
            imglst.Images.Add(myImageListLarge.Images(n))
        Next
        ListView1.LargeImageList = imglst
        ListView1.View = View.LargeIcon
    End Sub

    Private Sub ToolStripButton2_Click(sender As Object, e As EventArgs) Handles ToolStripButton2.Click
        ListView1.SmallImageList = myImageListSmall
        ListView1.View = View.SmallIcon
    End Sub

    Private Sub ToolStripButton3_Click(sender As Object, e As EventArgs) Handles ToolStripButton3.Click
        ListView1.View = View.List
    End Sub

    Private Sub TrackBar1_Scroll(sender As Object, e As EventArgs) Handles TrackBar1.Scroll
        large_images()
    End Sub

    Private Sub ToolStripButton4_Click(sender As Object, e As EventArgs) Handles ToolStripButton4.Click
        If Me.SplitContainer1.Panel2.Visible Then
            Me.SplitContainer1.Panel2.Visible = False
            Me.DefaultSplitsize = Me.SplitContainer1.Panel1.Width
            Me.SplitContainer1.SplitterDistance = Me.SplitContainer1.Width
        Else
            Me.SplitContainer1.Panel2.Visible = True
            Me.SplitContainer1.SplitterDistance = DefaultSplitsize
        End If
    End Sub

    Private Sub KpImageViewer1_Load(sender As Object, e As EventArgs)

    End Sub

#Region "Gnostic"
    Private Sub tsActSize_Click(sender As Object, e As EventArgs) Handles tsActSize.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.Zoom.ZoomMode = Gnostice.Documents.Controls.WinForms.ZoomMode.ActualSize
        End If
    End Sub

    Private Sub tsFitPage_Click(sender As Object, e As EventArgs) Handles tsFitPage.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.Zoom.ZoomMode = Gnostice.Documents.Controls.WinForms.ZoomMode.FitPage
        End If
    End Sub

    Private Sub tsFitWidth_Click(sender As Object, e As EventArgs) Handles tsFitWidth.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.Zoom.ZoomMode = Gnostice.Documents.Controls.WinForms.ZoomMode.FitWidth
        End If
    End Sub

    Private Sub tsZoomOut_Click(sender As Object, e As EventArgs) Handles tsZoomOut.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.ZoomOut()
        End If
    End Sub

    Private Sub tsZoomIn_Click(sender As Object, e As EventArgs) Handles tsZoomIn.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.ZoomIn()
        End If
    End Sub

    Private Sub btnFirstPage_Click(sender As Object, e As EventArgs) Handles btnFirstPage.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.FirstPage()
        End If
    End Sub

    Private Sub btnPrvPage_Click(sender As Object, e As EventArgs) Handles btnPrvPage.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.PreviousPage()
        End If
    End Sub

    Private Sub btnNxtPage_Click(sender As Object, e As EventArgs) Handles btnNxtPage.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.NextPage()
        End If
    End Sub

    Private Sub btnLastPage_Click(sender As Object, e As EventArgs) Handles btnLastPage.Click
        If DocumentViewer1.IsDocumentLoaded Then
            DocumentViewer1.LastPage()
        End If
    End Sub

    Private Sub ToolStripButton5_Click(sender As Object, e As EventArgs) Handles ToolStripButton5.Click
        DocumentViewer1.RotatePagesAntiClockwise90()
    End Sub

    Private Sub ToolStripButton6_Click(sender As Object, e As EventArgs) Handles ToolStripButton6.Click
        DocumentViewer1.RotatePagesClockwise90()
    End Sub

    Private Sub txtGoToPage_KeyDown(sender As System.Object, e As System.Windows.Forms.KeyEventArgs) Handles txtGoToPage.KeyDown
        Select Case e.KeyCode

            Case Keys.NumPad0, Keys.NumPad1, Keys.NumPad2, Keys.NumPad3, Keys.NumPad4, Keys.NumPad5,
             Keys.NumPad6, Keys.NumPad7, Keys.NumPad8, Keys.NumPad9, Keys.Delete, Keys.[End],
             Keys.Home, Keys.Down, Keys.Up, Keys.Left, Keys.Right, Keys.Back
                e.SuppressKeyPress = False
                Exit Select

            Case Keys.D0, Keys.D1, Keys.D2, Keys.D3, Keys.D4, Keys.D5,
             Keys.D6, Keys.D7, Keys.D8, Keys.D9
                If e.Shift Then
                    e.SuppressKeyPress = True
                Else
                    e.SuppressKeyPress = False
                End If
                Exit Select

            Case Keys.Enter
                e.SuppressKeyPress = False
                If txtGoToPage.Text.Trim() <> "" Then
                    DocumentViewer1.GoToPage(Convert.ToInt32(txtGoToPage.Text))
                End If
                Exit Select
            Case Else

                e.SuppressKeyPress = True
                Exit Select
        End Select

    End Sub
    Private Sub txtZoom_KeyDown(sender As System.Object, e As System.Windows.Forms.KeyEventArgs) Handles txtZoom.KeyDown
        Select Case e.KeyCode

            Case Keys.NumPad0, Keys.NumPad1, Keys.NumPad2, Keys.NumPad3, Keys.NumPad4, Keys.NumPad5,
             Keys.NumPad6, Keys.NumPad7, Keys.NumPad8, Keys.NumPad9, Keys.Delete, Keys.[End],
             Keys.Home, Keys.Down, Keys.Up, Keys.Left, Keys.Right, Keys.Back
                e.SuppressKeyPress = False
                Exit Select

            Case Keys.D0, Keys.D1, Keys.D2, Keys.D3, Keys.D4, Keys.D5,
             Keys.D6, Keys.D7, Keys.D8, Keys.D9
                If e.Shift Then
                    e.SuppressKeyPress = True
                Else
                    e.SuppressKeyPress = False
                End If
                Exit Select

            Case Keys.Enter
                e.SuppressKeyPress = False
                DocumentViewer1.Zoom.ZoomPercent = Double.Parse(txtZoom.Text)
                Exit Select
            Case Else

                e.SuppressKeyPress = True
                Exit Select
        End Select
    End Sub

#End Region

End Class