//// 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 System.Collections.Generic;using System.Linq;using System.Text;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;
namespace DsPdfWeb.Demos.Basics{ // This sample demonstrates how different styles of numbered lists // can be rendered in DsPdf. // See also NumberedList. public class NumberedList2 { // Encapsulate page layout constants used in the sample: private struct Layout { // All around page margins: public static float Margin => 72; // List offset relative to item number: public static float ListOffset => 24; // List level indent: public static float ListIndent => 30; };
// Define simple tree type: private class Node { public Node(string text) { Text = text; } public string Text { get; } public List<Node> Children = new List<Node>(); }
// Renders a list of nodes as a numbered list. private PointF RenderNodes(ref Page page, PointF pt, List<Node> nodes, int level) { var tlBullet = page.Graphics.CreateTextLayout(); tlBullet.DefaultFormat.Font = StandardFonts.Times; tlBullet.MarginLeft = Layout.ListIndent * level;
var tlText = page.Graphics.CreateTextLayout(); tlText.DefaultFormat.Font = StandardFonts.Times; tlText.MarginLeft = Layout.ListOffset + Layout.ListIndent * level;
for (int i = 0; i < nodes.Count; ++i) { var g = page.Graphics; // Prep item text: tlText.Clear(); tlText.Append(nodes[i].Text); tlText.PerformLayout(true); if (pt.Y + tlText.ContentHeight > page.Size.Height - Layout.Margin) { page = page.Doc.NewPage(); g = page.Graphics; pt.Y = Layout.Margin; } // Prep item number: tlBullet.Clear(); tlBullet.Append(ItemIdxToString(i, level, tlBullet)); tlBullet.PerformLayout(true); // Render item: g.DrawTextLayout(tlBullet, pt); g.DrawTextLayout(tlText, pt); // Advance insertion point: pt.Y += tlText.ContentHeight; // Render children: if (nodes[i].Children.Count > 0) pt = RenderNodes(ref page, pt, nodes[i].Children, level + 1); } return pt; }
// Convert item index to item number representation, in a // Arabic -> Latin letters -> Roman numbers loop. // Roman numbers are right-aligned, others are left-aligned. private string ItemIdxToString(int itemIdx, int level, TextLayout tl) { switch (level % 3) { case 0: tl.MarginLeft = Layout.ListIndent * level; tl.MaxWidth = null; tl.TextAlignment = TextAlignment.Leading; return $"{itemIdx + 1}."; case 1: tl.MarginLeft = Layout.ListIndent * level; tl.MaxWidth = null; tl.TextAlignment = TextAlignment.Leading; return $"{(char)('a' + itemIdx)}."; case 2: tl.MarginLeft = 0; var font = tl.DefaultFormat.Font; tl.MaxWidth = Layout.ListIndent * level + tl.DefaultFormat.FontSize; tl.TextAlignment = TextAlignment.Trailing; return $"{IntToRoman(itemIdx + 1)}."; default: throw new Exception("Unexpected."); } }
// From http://dotnet-snippets.com/snippet/roman-numerals/667 private string IntToRoman(int number) { var result = new StringBuilder(); int[] digitsValues = { 1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000 }; string[] romanDigits = { "I", "IV", "V", "IX", "X", "XL", "L", "XC", "C", "CD", "D", "CM", "M" }; while (number > 0) { for (int i = digitsValues.Count() - 1; i >= 0; i--) if (number / digitsValues[i] >= 1) { number -= digitsValues[i]; result.Append(romanDigits[i].ToLower()); break; } } return result.ToString(); }
// Main entry point: public int CreatePDF(Stream stream) { var doc = new GcPdfDocument(); var page = doc.NewPage(); RenderNodes(ref page, new PointF(Layout.Margin, Layout.Margin), _arthrapods.Children, 0); // Done: doc.Save(stream); return doc.Pages.Count; }
// Sample tree data: private Node _arthrapods = new Node("Animalia Arthrapoda") { Children = new List<Node>() { new Node("Insecta") { Children = new List<Node>() { new Node("Archaeognatha") { Children = new List<Node>() { new Node("Protozoa") }, }, new Node("Thysanura") { Children = new List<Node>() { new Node("Silverfish") }, }, new Node("Ephemeoptera") { Children = new List<Node>() { new Node("Mafly") }, }, new Node("Odonata") { Children = new List<Node>() { new Node("Dragonfly"), new Node("Azure Damzelfly"), new Node("Emerald Damzelfly"), }, }, new Node("Orthoptera") { Children = new List<Node>() { new Node("Grasshopper"), new Node("Cricket"), new Node("Cave Cricket"), }, }, new Node("Phasmatodea") { Children = new List<Node>() { new Node("Walking Stick"), new Node("Leaf Bug"), }, }, new Node("Mantodea") { Children = new List<Node>() { new Node("Praying Mantis"), }, }, new Node("Blattoeda") { Children = new List<Node>() { new Node("Cockroach"), }, }, new Node("Isoptera") { Children = new List<Node>() { new Node("Termite"), }, }, new Node("Phithiraptera") { Children = new List<Node>() { new Node("Bird Lice"), new Node("Human Lice"), new Node("Pubic Lice"), }, }, new Node("Hemiptera") { Children = new List<Node>() { new Node("Cicada"), new Node("Pond Skater"), new Node("Tree Hopper"), new Node("Stink Bug"), new Node("Thrip"), new Node("Alderfly"), }, }, new Node("Siphonatera") { Children = new List<Node>() { new Node("Flea"), }, }, // Coleoptera etc skipped }, }, new Node("Myriapoda") { Children = new List<Node>() { new Node("Chilopoda") { Children = new List<Node>() { new Node("Centipede"), }, }, new Node("Diplopoda") { Children = new List<Node>() { new Node("Millipede"), new Node("Pitbug"), }, }, }, }, new Node("Crustacea") { Children = new List<Node>() { new Node("Branchiopod") { Children = new List<Node>() { new Node("Brine Shrimp"), new Node("Water Flea"), }, }, new Node("Maxillopod") { Children = new List<Node>() { new Node("Cyclopoid"), new Node("Calgid"), new Node("Barnacles"), }, }, new Node("Malacostracan") { Children = new List<Node>() { new Node("Krill"), new Node("Prawn"), new Node("Shrimp"), new Node("Cancrid Crab"), new Node("Fidder Crab"), new Node("Spider Crab"), new Node("Lobster"), new Node("Hermit Crab"), new Node("Cray Fish"), }, }, }, }, new Node("Pycnogonida") { Children = new List<Node>() { new Node("Pycnogonida") { Children = new List<Node>() { new Node("Sea Spider"), }, }, }, }, new Node("Merostomata") { Children = new List<Node>() { new Node("Merostomata") { Children = new List<Node>() { new Node("Horseshoe Spider"), }, }, }, }, new Node("Arachnida") { Children = new List<Node>() { new Node("Scorpiones") { Children = new List<Node>() { new Node("Buthid"), new Node("Imperial Scorpion"), }, }, new Node("Pseudoscorpions") { Children = new List<Node>() { new Node("Neobisiid"), new Node("Cheliferid"), }, }, new Node("Solfigugae") { Children = new List<Node>() { new Node("Wind Scorpion"), }, }, new Node("Acari") { Children = new List<Node>() { new Node("Tick"), new Node("Mite"), }, }, new Node("Araneae") { Children = new List<Node>() { new Node("Crib Weaver"), new Node("Funnel-web Spider"), new Node("Funnel Weaver"), new Node("Water Spider"), new Node("Jumping Spider"), new Node("Wolf Spider"), new Node("Nursery-web Spider"), new Node("Crab Spider"), new Node("Black Widow"), new Node("Tiger Oriental Tarantula"), new Node("Mexican Red-legged Tarantula"), }, }, }, }, }, }; }}