Module chart 

The chart view: its spec and panel, preparing the data off the UI thread, and exporting the chart as SVG, PNG or PDF.

Modules

chart_data

Prepare chart data from a LazyFrame: read the chart’s columns, then make points, bins or statistics. Every chart reads through read_columns: up to a row limit, spread across the table by the analysis sampler (not its first rows), returning RowsRead so the chart can say when it shows a sample.

chart_export

Chart export: the chart is drawn once as SVG, in the bundled font (IBM Plex Sans, under the SIL Open Font License, in assets/fonts), then written as SVG with its text as outlines, rasterized to PNG, or written as PDF from the same outlines (chart_pdf). The same figure comes out the same on every machine; text the bundled font lacks falls back to a system font.

chart_export_modal

Chart export dialog: where, in what format, style and size, with what legend, and the words around the chart. Its keys are the shared form keys (crate::app::form).

chart_modal

Chart view state: the chart’s spec and the panel that edits it.

chart_plot

What a chart plots. A worker prepares the data (PlotData), which the chart cache keeps; plot gives it its axes for the view, titled and numbered as the table prints the columns, and the screen and every export draw that Plot.