//// This code is part of Document Solutions for PDF .NET 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;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos.Basics{    // This demo illustrates the results of using the GcGraphics.DrawSlantedText() method    // with different combinations of arguments.    // The DrawSlantedText() method draws text slanted within a specified rectangle    // similar to how rotated text is drawn in MS Excel cells with borders.    // See also the DrawRotatedText demo.    public class DrawSlantedText    {        public int CreatePDF(Stream stream)        {            var doc = new GcPdfDocument();            var page = doc.Pages.Add();            var g = page.Graphics;            // Set up some values to manage layout:            var gap = g.Resolution;            var w = page.Size.Width / 3;            var h = w;
            // Various text alignments with SlantedTextAlignment.BelowRotatedInside:            Draw(g, q0(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Leading);            Draw(g, q1(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Trailing);            Draw(g, q2(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Center);            Draw(g, q3(), angle: -70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Distributed);            // Various text alignments with SlantedTextAlignment.BelowRotatedOutside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Leading);            Draw(g, q1(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Trailing);            Draw(g, q2(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Center);            Draw(g, q3(), angle: -70, false, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Distributed);            // Various text alignments with SlantedTextAlignment.AboveRotatedInside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Leading);            Draw(g, q1(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Trailing);            Draw(g, q2(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Center);            Draw(g, q3(), angle: -70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Distributed);            // Various text alignments with SlantedTextAlignment.AboveRotatedOutside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Leading);            Draw(g, q1(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Trailing);            Draw(g, q2(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Center);            Draw(g, q3(), angle: -70, false, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Distributed);            // Various text alignments with SlantedTextAlignment.CenterInsideOutside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Leading);            Draw(g, q1(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Trailing);            Draw(g, q2(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Center);            Draw(g, q3(), angle: -70, false, SlantedTextAlignment.CenterInsideOutside, TextAlignment.Distributed);            // Various text alignments with SlantedTextAlignment.CenterOutsideInside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Leading);            Draw(g, q1(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Trailing);            Draw(g, q2(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Center);            Draw(g, q3(), angle: -70, false, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Distributed);            // Examples with positive rotation angle using SlantedTextAlignment.BelowRotatedInside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Leading);            Draw(g, q1(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Trailing);            Draw(g, q2(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Center);            Draw(g, q3(), angle: 70, false, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Distributed);            // Examples with positive rotation angle using SlantedTextAlignment.AboveRotatedInside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Leading);            Draw(g, q1(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Trailing);            Draw(g, q2(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Center);            Draw(g, q3(), angle: 70, false, SlantedTextAlignment.AboveRotatedInside, TextAlignment.Distributed);
            // Below are examples of vertically stacked text.
            // Vertically stacked text rotated to a negative angle using SlantedTextAlignment.BelowRotatedInside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Leading);            Draw(g, q1(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Trailing);            Draw(g, q2(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Center);            Draw(g, q3(), angle: -20, true, SlantedTextAlignment.BelowRotatedInside, TextAlignment.Distributed);            // Vertically stacked text rotated to a negative angle using SlantedTextAlignment.BelowRotatedOutside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Leading);            Draw(g, q1(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Trailing);            Draw(g, q2(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Center);            Draw(g, q3(), angle: -20, true, SlantedTextAlignment.BelowRotatedOutside, TextAlignment.Distributed);            // Vertically stacked text rotated to a positive angle using SlantedTextAlignment.AboveRotatedOutside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Leading);            Draw(g, q1(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Trailing);            Draw(g, q2(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Center);            Draw(g, q3(), angle: 20, true, SlantedTextAlignment.AboveRotatedOutside, TextAlignment.Distributed);            // Vertically stacked text rotated to a positive angle using SlantedTextAlignment.CenterOutsideInside:            page = doc.Pages.Add();            g = page.Graphics;            Draw(g, q0(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Leading);            Draw(g, q1(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Trailing);            Draw(g, q2(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Center);            Draw(g, q3(), angle: 20, true, SlantedTextAlignment.CenterOutsideInside, TextAlignment.Distributed);
            // Done:            doc.Save(stream);            return doc.Pages.Count;
            RectangleF q0()            {                return new RectangleF(gap, gap, w, h);            }            RectangleF q1()            {                return new RectangleF(gap + w + gap, gap, w, h);            }            RectangleF q2()            {                return new RectangleF(gap, gap + h + gap, w, h);            }            RectangleF q3()            {                return new RectangleF(gap + w + gap, gap + h + gap, w, h);            }        }
        static void Draw(GcGraphics g, RectangleF rect, int angle, bool verticalStacking,            SlantedTextAlignment slantedAlign, TextAlignment textAlign)        {            // Draw a legend stating the current DrawRotatedText arguments' values:            var tlLegend = g.CreateTextLayout();            tlLegend.DefaultFormat.FontName = "Calibri";            tlLegend.DefaultFormat.FontSize = 9;            tlLegend.AppendLine($"Rotation angle: {angle}°");            tlLegend.AppendLine($"Text alignment: {textAlign}");            tlLegend.AppendLine($"Slanted text alignment: {slantedAlign}");            tlLegend.AppendLine($"Is vertical stacking: {verticalStacking}");            g.DrawTextLayout(tlLegend, rect.Location);
            // The target rectangle for the DrawRotatedText call:            var d = tlLegend.ContentHeight + g.Resolution;            rect.Y += d;            rect.Height -= d;            rect.Width -= d / 2;            var x = rect.X;            var y = rect.Y;            var w = rect.Width;            var h = rect.Height;
            // Draw the target rectangle:            g.DrawRectangle(rect, new GCDRAW::Pen(Color.PaleGreen, 3));
            if (!verticalStacking)            {                float dx = (float)(h / Math.Tan(Math.PI * angle / -180.0));                switch (slantedAlign)                {                    case SlantedTextAlignment.BelowRotatedInside:                    case SlantedTextAlignment.AboveRotatedOutside:                    case SlantedTextAlignment.CenterInsideOutside:                        g.DrawPolygon(new[] {                            new PointF(x + dx, y), new PointF(x + dx + w, y),                            new PointF(x + w, y + h), new PointF(x, y + h)},                            new GCDRAW::Pen(Color.Red, 1));                        break;                    case SlantedTextAlignment.BelowRotatedOutside:                    case SlantedTextAlignment.AboveRotatedInside:                    case SlantedTextAlignment.CenterOutsideInside:                        g.DrawPolygon(new[] {                            new PointF(x, y), new PointF(x + w, y),                            new PointF(x - dx + w, y + h), new PointF(x - dx, y + h)},                            new GCDRAW::Pen(Color.Red, 1));                        break;                }            }            else            {                float dy = (float)(w * Math.Tan(Math.PI * angle / 180.0));                switch (slantedAlign)                {                    case SlantedTextAlignment.BelowRotatedInside:                    case SlantedTextAlignment.AboveRotatedOutside:                    case SlantedTextAlignment.CenterInsideOutside:                        if (angle >= 0)                            g.DrawPolygon(new[] {                                new PointF(x, y), new PointF(x + w, y + dy), new PointF(x + w, y + dy + h), new PointF(x, y + h)},                                new GCDRAW::Pen(Color.Red, 1));                        else                            g.DrawPolygon(new[] {                                new PointF(x, y - dy), new PointF(x + w, y), new PointF(x + w, y + h), new PointF(x, y - dy + h)},                                new GCDRAW::Pen(Color.Red, 1));                        break;                    case SlantedTextAlignment.BelowRotatedOutside:                    case SlantedTextAlignment.AboveRotatedInside:                    case SlantedTextAlignment.CenterOutsideInside:                        if (angle >= 0)                            g.DrawPolygon(new[] {                                new PointF(x, y - dy), new PointF(x + w, y), new PointF(x + w, y + h), new PointF(x, y - dy + h)},                                new GCDRAW::Pen(Color.Red, 1));                        else                            g.DrawPolygon(new[] {                                new PointF(x, y), new PointF(x + w, y + dy), new PointF(x + w, y + dy + h), new PointF(x, y + h)},                                new GCDRAW::Pen(Color.Red, 1));                        break;                }            }            // Draw slanted text:            var tl = g.CreateTextLayout();            tl.DefaultFormat.FontName = "Calibri";            tl.DefaultFormat.FontSize = 12;            tl.TextAlignment = textAlign;            tl.Append("The quick brown fox jumps over the lazy dog. ");            tl.Append("The quick brown fox jumps over the lazy dog.");            g.DrawSlantedText(tl, angle, verticalStacking, rect, slantedAlign);        }            }}