// // This code is part of Document Solutions for PDF demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using GrapeCity.Documents.Pdf; using GrapeCity.Documents.Text; using GrapeCity.Documents.Drawing; namespace DsPdfWeb.Demos { // 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 { public int CreatePDF(Stream stream) { var doc = new GcPdfDocument(); var page = doc.NewPage(); var g = page.Graphics; var rc = Common.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: float rx = 36, ry = 24; // Using dedicated methods to draw and fill round rectangles: var 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: var tf = new TextFormat() { 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: var rHard = rEasy; rHard.Offset(0, rEasy.Height + 36); var 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; } // This method shows how to create a graphics path that may be used // to fill or draw arbitrary shapes on a GcGraphics. private static IPath MakeRoundRect(GcGraphics g, RectangleF rc, float rx, float ry) { var path = g.CreatePath(); var 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() { 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() { 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() { 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() { Point = new PointF(rc.Left + rx, rc.Top), SweepDirection = SweepDirection.Clockwise, Size = sz }); path.EndFigure(FigureEnd.Closed); return path; } } }