TimeSheetForm.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.Pdf.AcroForms
Imports GrapeCity.Documents.Text
Imports GrapeCity.Documents.Common
Imports GrapeCity.Documents.Drawing

'' This sample generates a PDF AcroForm representing a time sheet.
'' The same code Is used to generated the time sheet in the TimeSheet use case sample.
Public Class TimeSheetForm
    '' Font collection to hold the fonts we need:
    Private _fc As FontCollection = New FontCollection()
    '' The text layout used to render input fields when flattening the document:
    Private _inputTl As TextLayout = New TextLayout(72)
    '' The text format used for input fields:
    Private _inputTf As TextFormat = New TextFormat()
    '' Input fields margin:
    Private _inputMargin As Single = 5
    '' Space for employee's signature:
    Private _empSignRect As RectangleF
    '' Logo (we should dispose it after saving the document):
    Private _logo As Image

    '' Main entry point of this sample:
    Function CreatePDF(ByVal stream As Stream) As Integer
        '' Set up a font collection with the fonts we need:
        _fc.RegisterDirectory(Path.Combine("Resources", "Fonts"))
        '' Set that font collection on input fields' text layout
        '' (we will also set it on all text layouts that we'll use):
        _inputTl.FontCollection = _fc
        '' Set up layout And formatting for input fields:
        _inputTl.ParagraphAlignment = ParagraphAlignment.Center
        _inputTf.FontName = "Segoe UI"
        _inputTf.FontSize = 12
        _inputTf.FontBold = True

        '' Create the time sheet input form
        '' (in a real-life scenario, we probably would only create it once,
        '' And then re-use the form PDF):
        Dim doc = MakeTimeSheetForm()
        '' Save the PDF:
        doc.Save(stream)
        '' Images used in a document can be disposed only after saving the PDF:
        _logo.Dispose()
        '' Done:
        Return doc.Pages.Count
    End Function

    '' Data field names:
    Private Structure _Names
        Shared ReadOnly Dows As String() = {
            "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
        }
        Const EmpName = "empName"
        Const EmpTitle = "empTitle"
        Const EmpNum = "empNum"
        Const EmpStatus = "empStatus"
        Const EmpDep = "empDep"
        Const EmpSuper = "empSuper"
        Shared ReadOnly DtNames = New Dictionary(Of String, String()) From {
            {"Sun", New String() {"dtSun", "tSunStart", "tSunEnd", "tSunReg", "tSunOvr", "tSunTotal"}},
            {"Mon", New String() {"dtMon", "tMonStart", "tMonEnd", "tMonReg", "tMonOvr", "tMonTotal"}},
            {"Tue", New String() {"dtTue", "tTueStart", "tTueEnd", "tTueReg", "tTueOvr", "tTueTotal"}},
            {"Wed", New String() {"dtWed", "tWedStart", "tWedEnd", "tWedReg", "tWedOvr", "tWedTotal"}},
            {"Thu", New String() {"dtThu", "tThuStart", "tThuEnd", "tThuReg", "tThuOvr", "tThuTotal"}},
            {"Fri", New String() {"dtFri", "tFriStart", "tFriEnd", "tFriReg", "tFriOvr", "tFriTotal"}},
            {"Sat", New String() {"dtSat", "tSatStart", "tSatEnd", "tSatReg", "tSatOvr", "tSatTotal"}}
        }
        Const TotalReg = "totReg"
        Const TotalOvr = "totOvr"
        Const TotalHours = "totHours"
        Const EmpSign = "empSign"
        Const EmpSignDate = "empSignDate"
        Const SupSign = "supSign"
        Const SupSignDate = "supSignDate"
    End Structure

    '' Creates the Time Sheet form:
    Private Function MakeTimeSheetForm() As GcPdfDocument

        Const marginH = 72.0F, marginV = 48.0F
        Dim doc = New GcPdfDocument()
        Dim page = doc.NewPage()
        Dim g = page.Graphics
        Dim ip = New PointF(marginH, marginV)

        Dim tl = New TextLayout(g.Resolution) With {.FontCollection = _fc}

        tl.Append("TIME SHEET", New TextFormat() With {.FontName = "Segoe UI", .FontSize = 18})
        tl.PerformLayout(True)
        g.DrawTextLayout(tl, ip)
        ip.Y += tl.ContentHeight + 15

        _logo = Image.FromFile(Path.Combine("Resources", "ImagesBis", "AcmeLogo-vertical-250px.png"))
        Dim s = New SizeF(250.0F * 0.75F, 64.0F * 0.75F)
        g.DrawImage(_logo, New RectangleF(ip, s), Nothing, ImageAlign.Default)
        ip.Y += s.Height + 5

        tl.Clear()
        tl.Append("Where Business meets Technology",
            New TextFormat() With {.FontName = "Segoe UI", .FontItalic = True, .FontSize = 10})
        tl.PerformLayout(True)
        g.DrawTextLayout(tl, ip)
        ip.Y += tl.ContentHeight + 15

        tl.Clear()
        tl.Append($"1901, Halford Avenue,{vbCrLf}Santa Clara, California – 95051-2553,{vbCrLf}United States",
            New TextFormat() With {.FontName = "Segoe UI", .FontSize = 9})
        tl.MaxWidth = page.Size.Width - marginH * 2
        tl.TextAlignment = TextAlignment.Trailing
        tl.PerformLayout(True)
        g.DrawTextLayout(tl, ip)
        ip.Y += tl.ContentHeight + 25

        Dim pen = New Pen(Color.Gray, 0.5F)

        Dim colw = (page.Size.Width - marginH * 2) / 2
        Dim fields1 = DrawTable(ip,
            New Single() {colw, colw},
            New Single() {30, 30, 30},
            g, pen)

        Dim tf = New TextFormat() With {.FontName = "Segoe UI", .FontSize = 9}
        With tl
            .ParagraphAlignment = ParagraphAlignment.Center
            .TextAlignment = TextAlignment.Leading
            .MarginLeft = 4
            .MarginRight = 4
            .MarginTop = 4
            .MarginBottom = 4
        End With
        '' t_ - caption
        '' b_ - bounds
        '' f_ - field name, null means no field
        Dim drawField As Action(Of String, RectangleF, String) =
            Sub(t_, b_, f_)
                Dim tWidth As Single
                If Not String.IsNullOrEmpty(t_) Then
                    tl.Clear()
                    tl.MaxHeight = b_.Height
                    tl.MaxWidth = b_.Width
                    tl.Append(t_, tf)
                    tl.PerformLayout(True)
                    g.DrawTextLayout(tl, b_.Location)
                    tWidth = tl.ContentRectangle.Right
                Else
                    tWidth = 0
                End If
                If Not String.IsNullOrEmpty(f_) Then
                    Dim fld = New TextField() With {.Name = f_}
                    fld.Widget.Page = page
                    fld.Widget.Rect = New RectangleF(
                    b_.X + tWidth + _inputMargin, b_.Y + _inputMargin,
                    b_.Width - tWidth - _inputMargin * 2, b_.Height - _inputMargin * 2)
                    fld.Widget.TextFormat = _inputTf
                    fld.Widget.Border.Color = Color.LightSlateGray
                    fld.Widget.Border.Width = 0.5F
                    doc.AcroForm.Fields.Add(fld)
                End If
            End Sub

        drawField("EMPLOYEE NAME: ", fields1(0, 0), _Names.EmpName)
        drawField("TITLE: ", fields1(1, 0), _Names.EmpTitle)
        drawField("EMPLOYEE NUMBER: ", fields1(0, 1), _Names.EmpNum)
        drawField("STATUS: ", fields1(1, 1), _Names.EmpStatus)
        drawField("DEPARTMENT: ", fields1(0, 2), _Names.EmpDep)
        drawField("SUPERVISOR: ", fields1(1, 2), _Names.EmpSuper)

        ip.Y = fields1(0, 2).Bottom

        Dim col0 = 100.0F
        colw = (page.Size.Width - marginH * 2 - col0) / 5
        Dim rowh = 25.0F
        Dim fields2 = DrawTable(ip,
                New Single() {col0, colw, colw, colw, colw, colw},
                New Single() {50, rowh, rowh, rowh, rowh, rowh, rowh, rowh, rowh},
                g, pen)

        tl.ParagraphAlignment = ParagraphAlignment.Far
        drawField("DATE", fields2(0, 0), Nothing)
        drawField("START TIME", fields2(1, 0), Nothing)
        drawField("END TIME", fields2(2, 0), Nothing)
        drawField("REGULAR HOURS", fields2(3, 0), Nothing)
        drawField("OVERTIME HOURS", fields2(4, 0), Nothing)
        tf.FontBold = True
        drawField("TOTAL HOURS", fields2(5, 0), Nothing)
        tf.FontBold = False
        tl.ParagraphAlignment = ParagraphAlignment.Center
        tf.ForeColor = Color.Gray
        For i = 0 To 6
            drawField(_Names.Dows(i), fields2(0, i + 1), _Names.DtNames(_Names.Dows(i))(0))
        Next

        tf.ForeColor = Color.Black
        For row = 1 To 7
            For col = 1 To 5
                drawField(Nothing, fields2(col, row), _Names.DtNames(_Names.Dows(row - 1))(col))
            Next
        Next

        tf.FontBold = True
        drawField("WEEKLY TOTALS", fields2(0, 8), Nothing)
        tf.FontBold = False

        drawField(Nothing, fields2(3, 8), _Names.TotalReg)
        drawField(Nothing, fields2(4, 8), _Names.TotalOvr)
        drawField(Nothing, fields2(5, 8), _Names.TotalHours)

        ip.Y = fields2(0, 8).Bottom

        col0 = 72 * 4
        colw = page.Size.Width - marginH * 2 - col0
        Dim fields3 = DrawTable(ip,
            New Single() {col0, colw},
            New Single() {rowh + 10, rowh, rowh},
            g, pen)

        drawField("EMPLOYEE SIGNATURE: ", fields3(0, 1), Nothing)
        Dim r = fields3(0, 1)
        _empSignRect = New RectangleF(r.X + r.Width / 2, r.Y, r.Width / 2 - _inputMargin * 2, r.Height)
        Dim sfEmp = New SignatureField()
        sfEmp.Name = _Names.EmpSign
        sfEmp.Widget.Rect = New RectangleF(r.X + r.Width / 2, r.Y + _inputMargin, r.Width / 2 - _inputMargin * 2, r.Height - _inputMargin * 2)
        sfEmp.Widget.Page = page
        sfEmp.Widget.BackColor = Color.LightSeaGreen
        doc.AcroForm.Fields.Add(sfEmp)
        drawField("DATE: ", fields3(1, 1), _Names.EmpSignDate)

        drawField("SUPERVISOR SIGNATURE: ", fields3(0, 2), Nothing)
        r = fields3(0, 2)
        Dim sfSup = New SignatureField()
        sfSup.Name = _Names.SupSign
        sfSup.Widget.Rect = New RectangleF(r.X + r.Width / 2, r.Y + _inputMargin, r.Width / 2 - _inputMargin * 2, r.Height - _inputMargin * 2)
        sfSup.Widget.Page = page
        sfSup.Widget.BackColor = Color.LightYellow
        doc.AcroForm.Fields.Add(sfSup)
        drawField("DATE: ", fields3(1, 2), _Names.SupSignDate)

        '' Done:
        Return doc
    End Function

    '' Simple table drawing method. Returns the array of table cell rectangles.
    Private Function DrawTable(ByVal loc As PointF, ByVal widths As Single(), ByVal heights As Single(), ByVal g As GcGraphics, ByVal p As Pen) As RectangleF(,)
        If widths.Length = 0 OrElse heights.Length = 0 Then
            Throw New Exception("Table must have some columns and rows.")
        End If
        Dim cells(widths.Length, heights.Length) As RectangleF
        Dim r = New RectangleF(loc, New SizeF(widths.Sum(), heights.Sum()))
        '' Draw left borders (except for 1st one):
        Dim x = loc.X
        For i = 0 To widths.Length - 1
            For j = 0 To heights.Length - 1
                cells(i, j).X = x
                cells(i, j).Width = widths(i)
            Next
            If (i > 0) Then
                g.DrawLine(x, r.Top, x, r.Bottom, p)
            End If
            x += widths(i)
        Next
        '' Draw top borders (except for 1st one):
        Dim y = loc.Y
        For j = 0 To heights.Length - 1
            For i = 0 To widths.Length - 1
                cells(i, j).Y = y
                cells(i, j).Height = heights(j)
            Next
            If (j > 0) Then
                g.DrawLine(r.Left, y, r.Right, y, p)
            End If
            y += heights(j)
        Next
        '' Draw outer border:
        g.DrawRectangle(r, p)
        '' Done:
        Return cells
    End Function
End Class