VerticalText.vb
''
'' This code is part of GrapeCity Documents for PDF samples.
'' Copyright (c) GrapeCity, Inc. All rights reserved.
''
Imports System.IO
Imports System.Drawing
Imports GrapeCity.Documents.Pdf
Imports GrapeCity.Documents.Text
Imports GrapeCity.Documents.Drawing

'' Demonstrates rendering of vertical text in LTR and RTL modes.
'' Also shows how to have text flow around rectangular objects.
'' See also JapaneseColumns.
Public Class VerticalText
    Function CreatePDF(ByVal stream As Stream) As Integer
        Dim doc = New GcPdfDocument()
        Dim page = doc.NewPage()
        '' Use Landscape orientation:
        page.Landscape = True
        Dim g = page.Graphics
        '' Some sample texts in Japanese, English and Arabic:
        Dim text1 = "学校教育の「国語」で教えられる。"
        Dim text2 = " flow direction. "
        Dim text3 = "النص العربي 12 + 34 = 46 مع الأرقام "
        '' Init font cache and get the required fonts:
        Dim fc = New FontCollection()
        fc.RegisterDirectory(Path.Combine("Resources", "Fonts"))
        Dim fYuMin = fc.FindFamilyName("Yu Mincho")
        Dim fTimes = fc.FindFamilyName("Times New Roman")
        Dim fArial = fc.FindFamilyName("Arial")
        '' Create text formats:
        Dim tf1 = New TextFormat() With {.Font = fYuMin}
        Dim tf2 = New TextFormat() With {.Font = fTimes}
        Dim tf3 = New TextFormat() With {.Font = fArial}
        '' Create TextLayout and set some options on it:
        Dim tl = g.CreateTextLayout()
        tl.FirstLineIndent = 36
        tl.TextAlignment = TextAlignment.Justified
        '' This setting justifies the last line too:
        tl.LastLineIsEndOfParagraph = False
        '' Set all margins to 1":
        tl.MarginAll = tl.Resolution
        tl.MaxWidth = page.Size.Width
        tl.MaxHeight = page.Size.Height
        '' RTL layout:
        tl.RightToLeft = False
        '' Build a list of objects for the text to flow around:
        tl.ObjectRects = New List(Of ObjectRect) From {
                New ObjectRect(540, 100, 120, 160),
                New ObjectRect(100, 290, 170, 100),
                New ObjectRect(500, 350, 170, 100)
            }
        '' Fill corresponding rectangels on page so that we can see them:
        For Each objRect In tl.ObjectRects
            g.FillRectangle(objRect.ToRectangleF(), Color.PaleVioletRed)
        Next

        '' Add text to layout:
        For i = 1 To 3
            tl.Append(text1, tf1)
            tl.Append("Horizontal Top To Bottom" + text2, tf2)
            tl.AppendLine(text3, tf3)
        Next

        '' Perform and draw first layout:
        tl.PerformLayout(True)
        g.DrawTextLayout(tl, PointF.Empty)
        g.FillRectangle(tl.ContentRectangle, Color.FromArgb(20, Color.Red))

        '' Create 2nd layout - vertical rotated counter-clockwise:
        Dim t = tl.ContentHeight
        tl.Clear()
        tl.RotateSidewaysCounterclockwise = True
        tl.FlowDirection = FlowDirection.VerticalLeftToRight
        tl.MarginTop += t
        '' Add text to layout:
        For i = 1 To 3
            tl.Append(text1, tf1)
            tl.Append("Vertical Left To Right" + text2, tf2)
            tl.AppendLine(text3, tf3)
        Next
        '' Perform and draw second layout:
        tl.PerformLayout(True)
        g.DrawTextLayout(tl, PointF.Empty)
        g.FillRectangle(tl.ContentRectangle, Color.FromArgb(20, Color.Green))

        '' Create 3rd layout - vertical:
        tl.Clear()
        tl.FlowDirection = FlowDirection.VerticalRightToLeft
        tl.RotateSidewaysCounterclockwise = False
        '' Add text to layout:
        For i = 1 To 3
            tl.Append(text1, tf1)
            tl.Append("Vertical Right To Left" + text2, tf2)
            tl.AppendLine(text3, tf3)
        Next
        '' Perform and draw third layout:
        tl.PerformLayout(True)
        g.DrawTextLayout(tl, PointF.Empty)
        g.FillRectangle(tl.ContentRectangle, Color.FromArgb(20, Color.Blue))
        ''
        '' Done:
        doc.Save(stream)
        Return doc.Pages.Count
    End Function
End Class