Two findings on the pass-1 fix:
- The reserved strips were clamped only to the viewport, so a title wider than a
narrow panel took the rest of it and the axes collapsed: draw_traces() returned
on a zero-width rect (no trace drawn, nothing reported) and a zero-height one
flattened every trace onto a single row. The chrome is now capped at half the
viewport -- the label strip is served first, the title strip takes what is left
of that allowance -- an over-long title is clipped to its strip by a walk that
both measures and stages it, and draw_traces() tests the height as well as the
width.
- Every titled y axis was staged at the same centred position inside one strip, so
a Left/Right pair of titles overprinted. Each titled axis now owns a text line:
the x strip grows one line per titled x axis (x_title_height), and the y runs
stack down the axes-tall strip, which needs no extra width for it.
Tests: `narrow_panel_with_a_long_y_title_still_draws` and
`short_panel_with_an_x_title_still_draws` pin the floor (the axes keeps half the
panel and the trace still covers the columns, with the title clipped into its
strip), `titled_axis_pairs_get_their_own_rows` pins one text row per titled axis
in both directions, and `layout_stacks_one_title_line_per_titled_axis` pins the
strip sizing. All fail against the pass-1 sources.
Martino Ferrari
1f5aa11de2