ByteScout PDF Viewer SDK – VB.NET – Selection Options and CustomPaint

ByteScout PDF Viewer SDK – VB.NET – Selection Options and CustomPaint

Form1.vb

Imports System.Collections.Generic
Imports System.Drawing
Imports System.Windows.Forms
Imports Bytescout.PDFViewer

Public Partial Class Form1
	Inherits Form
	Public Sub New()
		InitializeComponent()
	End Sub

	Protected Overrides Sub OnLoad(e As EventArgs)
		pdfViewerControl1.InputFile = "sample.pdf"

		MyBase.OnLoad(e)
	End Sub

    Private Sub tsbOpen_Click(sender As Object, e As EventArgs) Handles tsbOpen.Click
        Using openFileDialog As New OpenFileDialog()
            openFileDialog.Title = "Open PDF Document"
            openFileDialog.Filter = "PDF Files (*.pdf)|*.pdf|All Files|*.*"

            If openFileDialog.ShowDialog() = DialogResult.OK Then
                Me.Text = openFileDialog.FileName

                Cursor = Cursors.WaitCursor

                Try
                    pdfViewerControl1.InputFile = openFileDialog.FileName
                Catch exception As Exception
                    MessageBox.Show(exception.Message)
                Finally
                    Cursor = Cursors.[Default]
                End Try
            End If
        End Using
    End Sub

    Private Sub cbMultiSelectMode_CheckedChanged(sender As Object, e As EventArgs) Handles cbMultiSelectMode.CheckedChanged
        pdfViewerControl1.MultiSelectMode = cbMultiSelectMode.Checked
    End Sub

    Private Sub cbAllowResizeSelection_CheckedChanged(sender As Object, e As EventArgs) Handles cbAllowResizeSelection.CheckedChanged
        pdfViewerControl1.AllowResizeSelectionRectangles = cbAllowResizeSelection.Checked
    End Sub

    Private Sub cbLockSelection_CheckedChanged(sender As Object, e As EventArgs) Handles cbLockSelection.CheckedChanged
        pdfViewerControl1.LockSelection = cbLockSelection.Checked
    End Sub

	Private _labels As List(Of [String]) = New List(Of String)()

    Private Sub pdfViewerControl1_SelectionChanged(ByVal sender As Object, ByVal selectionChange As SelectionChange, ByVal selectionIndex As Integer) Handles pdfViewerControl1.SelectionChanged
        If pdfViewerControl1.Selection.Length > _labels.Count Then
            For i As Integer = _labels.Count To pdfViewerControl1.Selection.Length - 1
                _labels.Add(New Random().[Next]().ToString())
            Next
        End If
    End Sub

    Private Sub pdfViewerControl1_CustomPaint(sender As Object, e As PaintEventArgs) Handles pdfViewerControl1.CustomPaint
        ' Paint labels
        For i As Integer = 0 To pdfViewerControl1.Selection.Length - 1
            Dim r As Rectangle = Rectangle.Round(pdfViewerControl1.Selection(i))
            r = pdfViewerControl1.TranslateRectangleToViewport(r)

            Dim textSize As Size = TextRenderer.MeasureText(_labels(i), Font)
            Dim textRectangle As New Rectangle(r.Left, r.Top - textSize.Height - 6, textSize.Width + 2, textSize.Height + 2)

            e.Graphics.FillRectangle(Brushes.DarkBlue, textRectangle)
            TextRenderer.DrawText(e.Graphics, _labels(i), Font, textRectangle, Color.White, TextFormatFlags.HorizontalCenter Or TextFormatFlags.VerticalCenter)
        Next
    End Sub
End Class

Program.vb

Imports System.Collections.Generic
Imports System.Windows.Forms

NotInheritable Class Program
	Private Sub New()
	End Sub
	''' <summary>
	''' The main entry point for the application.
	''' </summary>
	<STAThread> _
	Private Shared Sub Main()
		Application.EnableVisualStyles()
		Application.SetCompatibleTextRenderingDefault(False)
		Application.Run(New Form1())
	End Sub
End Class

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