tessera_svg 0.2.0

SVG export for the tessera pivot-table engine: draws a cube as a scalable image with merged group headers, themed with CubeExportTheme. Pure Dart.

tessera_svg

SVG export for the tessera pivot-table engine.

SvgCubeExporter draws a CubeLayout (the expanded rows and columns exactly as shown) as one scalable image: merged group headers in the "rotated L" shape, one column per aggregate under each column entry, subtotals on the group's own row, fills and fonts from the engine's CubeExportTheme (brand, gradient and hue-level themes alike). Labels and numbers come from TesseraStrings, so the export is localized like the widgets. Columns are sized to their content by the engine's GridMetrics; pure Dart cannot measure text, so widths are estimated from the font and every text is clipped to its cell — pass measureText (a TextPainter in a Flutter app) for exact widths.

Pure Dart, no Flutter — servers, CLIs and apps alike. Embeds in web pages and documents, prints crisply at any size.

import 'package:tessera_svg/tessera_svg.dart';

final svg = SvgCubeExporter(
  strings: TesseraStrings.forLanguage('hu')!,
  theme: CubeExportTheme.brand(primary: 0xFF00695C),
).export(cube.layout, title: 'Sales by region');

export returns the SVG as a String.

User guide: github.com/nagylzs/tessera/docs — data sources, schema, cubes, aggregates, filters, the expression language, widgets, theming, export, localization, saving, large data.

Example

example/main.dart reads example/sales.csv, builds a region/country × year/quarter cube with every region expanded and writes it as sales_pivot.svg:

dart run example/main.dart [input.csv] [output.svg]

License

MIT — see LICENSE. Author: László Zsolt Nagy.