The stepper's depth and ViewConfig's group_by_depth/split_by_depth are
the same unit -- a count of levels to show -- but applyDepth and
applySplitDepth sent d + 1 and every readback subtracted the same 1.
Self-consistent, so the toolbar always agreed with itself, and off by
one against the grid at every position: picking partgroup showed one
level past it. server.cpp turns group_by_depth into set_depth(n - 1)
and t_traversal::set_depth adds the 1 back, so n asks for n levels.
The +1 existed to dodge depth 0, which reaches the engine as
set_depth(-1) on an unsigned t_depth, underflows, and clamps to fully
expanded. The value is floored at 1 instead, so the stepper's "Total"
slot goes on showing the first level as it always has -- the wart is
kept deliberately rather than traded for the underflow. A bare total
needs group_rollup_mode.
Separately: fitRowLabels() has been written and unused since it was
judged to read worse than the default spacing. That judgement has
changed -- row labels come back clipped after a restore -- so it is now
called after both restore paths, initViewer and applyLayout. It is not
routed through the Fit widths button on purpose: that path goes via
regular-table's auto-size, which measures the leaf header's rendered
box over viewport rows only, while fitRowLabels canvas-measures the
label text.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Paul Trowbridge
87ad5b1997