Building Complex, Excel-Style Data Tables with PDF & Excel Exports in Flutter 📊

If you have ever been tasked with building an enterprise dashboard, an inventory tracker, or a financial report in Flutter, you already know the struggle. Flutter’s built-in DataTable and Table widgets are fantastic for simple lists. But the moment your client asks for nested sub-headers, sticky "freeze-pane" columns, inline editing, and PDF/Excel exports, you are usually looking at weeks of custom UI architecture. I got frustrated dealing with this exact problem, so I built a robust solution: nrb (Nexora Report Builder). What is nrb? nrb is a customizable, highly responsive Flutter table widget builder designed specifically for complex data visualization and structured data-entry UIs. Here is a breakdown of what it handles out of the box: 📌 Complex Nested Headers: Build top-level main headers with multiple sub-headers underneath, plus sticky left-side columns that stay locked while scrolling horizontally. 📱 Fully Responsive & Resizable: Columns auto-measure their content (wrap_content