toolkit: add LineChart polyline plot#9
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The full-size sibling of the inline Sparkline: plots one series as a polyline over a left+bottom axis frame, values spread evenly across the width and scaled between Min/Max (auto-derived when equal). A lone point renders as a dot; an empty series draws just the axes. Adds a shared Bresenham drawLine helper (over putPixel — the primitive both back-ends share for arbitrary slopes). 100% coverage. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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The full-size sibling of the inline
Sparkline: plots one[]float64series as a polyline over a left+bottom axis frame. Values spread evenly across the plot width and scale vertically betweenMinandMax(auto-derived from the data when equal). A lone point renders as a dot; an empty series draws just the axes. Display-only.Adds a shared Bresenham
drawLineraster helper (overputPixel— the primitive both back-ends share for arbitrary slopes; on aCellPaintereach pixel promotes to a filled cell), so the same chart renders as anti-aliased pixels (WUI/GUI) or promoted cells (TUI).Renders through
painter.Painter. 100% coverage;go vetclean; builds on all 6 arches + js/wasm.🤖 Generated with Claude Code