Dynamic element prototype

2021-10-19 01:40:56 +02:00
parent 68f050a154
commit d3e8386418
6 changed files with 233 additions and 6 deletions
@@ -0,0 +1,115 @@
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using QuestPDF.Elements;
+using QuestPDF.Examples.Engine;
+using QuestPDF.Fluent;
+using QuestPDF.Helpers;
+using QuestPDF.Infrastructure;
+
+namespace QuestPDF.Examples
+{
+    public class TableWithSubtotals : IDynamic
+    {
+        private ICollection<int> Values { get; }
+        private Queue<int> ValuesQueue { get; set; }
+
+        public TableWithSubtotals(ICollection<int> values)
+        {
+            Values = values;
+        }
+        
+        public void Reset()
+        {
+            ValuesQueue = new Queue<int>(Values);
+        }
+
+        public bool Compose(DynamicContext context, IContainer container)
+        {
+            var internalQueue = new Queue<int>(ValuesQueue);
+            
+            container.Box().Border(2).Background(Colors.Grey.Lighten3).Stack(stack =>
+            {
+                var summaryHeight = 40f;
+                
+                var totalHeight = summaryHeight;
+                var total = 0;
+                
+                while (internalQueue.Any())
+                {
+                    var value = internalQueue.Peek();
+
+                    var structure = context.Content(content =>
+                    {
+                        content
+                            .Padding(10)
+                            .Text(value);
+                    });
+
+                    var structureHeight = structure.Measure().Height;
+
+                    if (totalHeight + structureHeight > context.AvailableSize.Height)
+                        break;
+
+                    totalHeight += structureHeight;
+                    total += value;
+
+                    stack.Item().Border(1).Element(structure);
+                    internalQueue.Dequeue();
+                }
+                
+                stack
+                    .Item()
+                    .ShowEntire()
+                    .Border(2)
+                    .Background(Colors.Grey.Lighten1)
+                    .Padding(10)
+                    .Text($"Total: {total}", TextStyle.Default.SemiBold());
+            });
+
+            if (context.IsDrawStep)
+                ValuesQueue = internalQueue;
+            
+            return internalQueue.Any();
+        }
+    }
+    
+    public static class DynamicExamples
+    {
+        [Test]
+        public static void Dynamic()
+        {
+            RenderingTest
+                .Create()
+                .PageSize(300, 500)
+                .FileName()
+                .ShowResults()
+                .Render(container =>
+                {
+                    var values = Enumerable.Range(0, 15).ToList();
+                    
+                    container
+                        .Background(Colors.White)
+                        .Padding(25)
+                        .Decoration(decoration =>
+                        {
+                            decoration
+                                .Header()
+                                .PaddingBottom(5)
+                                .Text(text =>
+                                {
+                                    text.DefaultTextStyle(TextStyle.Default.SemiBold().Color(Colors.Blue.Darken2).Size(16));
+                                    text.Span("Page ");
+                                    text.CurrentPageNumber();
+                                    text.Span(" of ");
+                                    text.TotalPages();
+                                });
+                            
+                            decoration
+                                .Content()
+                                .Dynamic(new TableWithSubtotals(values));
+                        });
+                });
+        }
+    }
+}