SlintPlot 0.4.0

Added

• SegmentedRingChart: a heatmap bent into concentric rings. values is a
  matrix ([[float]]), one row per ring, the first outermost, and one
  segment per column, going round from start-angle, either way. The matrix
  sets the size: as many rings as rows and as many segments as the longest
  row, so data of any shape fits without settings; shorter rows and missing
  values (NaN) are left as a faint track. Cells are colored on a scale, as in
  HeatmapChart (color, diverging, fixed-range), with a color scale
  legend, or by category: with classes set, each value is a category index,
  and the categories make a legend that hides them. x-labels go round the
  outside, thinned where they don't fit, and y-labels name the rings in the
  tooltip. center-text and center-label are written in the middle, and
  hovering a cell shows it there instead. A dot can mark the start, and
  glow adds a soft light in the middle. The cells sweep in when the chart
  appears; the arrow keys go round and between the rings, and
  cell-clicked(row, column) reports clicks.

• TileGridChart: a matrix as rows of rounded squares, one per value, like
  an activity grid. It takes its data as SegmentedRingChart does: values
  is a matrix ([[float]]), one row of tiles per row, and the matrix sets the
  size, the tiles staying square, as large as fit, and centered. Cells are
  colored on a scale or by category (classes), with the same properties; missing
  values are empty tiles, a faint track. y-labels go at the left and
  x-labels below, thinned where they don't fit; tile-gap and
  tile-radius shape the tiles. The tiles sweep in from the left; hovering
  outlines a tile with a tooltip, the arrow keys move from tile to tile, and
  cell-clicked(row, column) reports clicks.

Example apps

• Gallery: builds without Slint's binding loop warnings. The window
  shrinks to phone width, so a browser window made narrower switches to the
  phone layout instead of cutting off the page; the layout switches at 900px
  instead of 720px, where the sample list and header no longer fit beside the
  chart.
  Samples of the two new charts under Heatmaps, each one sidebar entry with
  two tabs, by category and on a scale, of four charts of different sizes and
  uses. They follow the theme, with their own colors only where the colors
  carry meaning, such as green, amber and red for a service's status; on the
  segmented ring category page and both tile grid pages, a second dropdown
  under the theme picker switches between the theme's colors and these. The heatmap sample shows
  the visits in each cell, in two-hour blocks so that the numbers fit.
• Stress test: segmented ring and tile grid charts, on a scale and by
  category, from 100 to 1,000,000 cells.
• Fuzz test: the two new charts, for 25 chart types.