'''' This code is part of Document Solutions for PDF .NET demos.'' Copyright (c) MESCIUS inc. All rights reserved.''Imports System.IOImports System.DrawingImports GrapeCity.Documents.PdfImports GrapeCity.Documents.TextImports GrapeCity.Documents.Drawing
'' This sample demonstrates how to draw round rectangles'' using dedicated DrawRoundRect/FillRoundRect methods.'' It also shows how the same result may be achieved with'' graphics paths.Public Class RoundRectangle    Function CreatePDF(ByVal stream As Stream) As Integer        Dim doc = New GcPdfDocument()        Dim page = doc.NewPage()        Dim g = page.Graphics
        Dim rc = Util.AddNote(            "GcPdfGraphics has dedicated methods to easily draw and fill rectangles with rounded corners. " +            "This sample also shows how the same result may be achieved using graphics paths. " +            "While they are not really needed for drawing round rectangles, graphics paths allow " +            "to draw and fill arbitrary figures with complex geometries.",            page)
        '' Rounded rectangle's radii:        Dim rx = 36, ry = 24
        '' Using dedicated methods to draw And fill round rectangles:        Dim rEasy = New RectangleF(rc.Left, rc.Bottom + 36, 144, 72)        g.FillRoundRect(rEasy, rx, ry, Color.PaleGreen)        g.DrawRoundRect(rEasy, rx, ry, Color.Blue, 4)        '' Add a label:        Dim tf = New TextFormat() With {.Font = StandardFonts.Times, .FontSize = 14}        g.DrawString("The easy way.", tf, rEasy, TextAlignment.Center, ParagraphAlignment.Center, False)
        '' Using graphics path to achieve the same result:        Dim rHard = rEasy        rHard.Offset(0, rEasy.Height + 36)        Dim path = MakeRoundRect(g, rHard, rx, ry)        g.FillPath(path, Color.PaleVioletRed)        g.DrawPath(path, Color.Purple, 4)        '' Add a label:        g.DrawString("The hard way.", tf, rHard, TextAlignment.Center, ParagraphAlignment.Center, False)
        '' Done        doc.Save(stream)        Return doc.Pages.Count    End Function
    '' This method shows how to create a graphics path that may be used    '' to fill Or draw arbitrary shapes on a GcGraphics.    Private Function MakeRoundRect(ByVal g As GcGraphics, ByVal rc As RectangleF, ByVal rx As Single, ByVal ry As Single) As IPath        Dim path = g.CreatePath()        Dim sz = New SizeF(rx, ry)        '' start from horizontal top left        path.BeginFigure(New PointF(rc.Left + rx, rc.Top))        path.AddLine(New PointF(rc.Right - rx, rc.Top))        path.AddArc(New ArcSegment() With {.Point = New PointF(rc.Right, rc.Top + ry), .SweepDirection = SweepDirection.Clockwise, .Size = sz})        path.AddLine(New PointF(rc.Right, rc.Bottom - ry))        path.AddArc(New ArcSegment() With {.Point = New PointF(rc.Right - rx, rc.Bottom), .SweepDirection = SweepDirection.Clockwise, .Size = sz})        path.AddLine(New PointF(rc.Left + rx, rc.Bottom))        path.AddArc(New ArcSegment() With {.Point = New PointF(rc.Left, rc.Bottom - ry), .SweepDirection = SweepDirection.Clockwise, .Size = sz})        path.AddLine(New PointF(rc.Left, rc.Top + ry))        path.AddArc(New ArcSegment() With {.Point = New PointF(rc.Left + rx, rc.Top), .SweepDirection = SweepDirection.Clockwise, .Size = sz})        path.EndFigure(FigureEnd.Closed)        Return path    End FunctionEnd Class