The event's bounding rectangle in grid space — for a single-column event
this is its drawn rect; for a spanning event it is the bounding box of all
its segmentRects. Used for the accessibility node's rect and as the drag
anchor (single-column events only).
Which sub-column this event occupies within its day-column, and how many
sub-columns the day-column is split into. They default to a single
full-width column; Manager overwrites them with the day's overlap layout
(#20) and then calls relayout.
The entry this event draws. Reassigned (never mutated) when a drag/resize
or nudge commits, since PlannerEntry/PlannerTime are immutable (#27):
the new instance is what flows on to PlannerConfig.onEntryMove.
This event's current on-screen rectangle — its grid rect (including any
live drag offset) mapped through the controller's scroll/zoom. Used by
paint to draw it and by the accessibility layer to place the event's
semantics node (#21).
The rectangles actually drawn and hit-tested, in grid space. A
single-column event has exactly one (== canvasRect); a spanning event
(#47) has one per covered column — a single continuous box in
SpanOverlap.fullWidth, or one narrowed sub-column box per column in
SpanOverlap.split.
A screen-reader description of this event — its title, day-column label,
time span and duration — so the otherwise-opaque CustomPaint canvas
exposes each event to assistive technology (#21). English-only for now,
matching the (also unlocalized) context-menu strings.
Clears any recorded span placement, so the next relayout draws the span
at full column width (SpanOverlap.fullWidth). Manager calls this before
re-laying out overlaps.
Whether point (grid space) falls inside any of this event's drawn
rectangles — the hit-test primitive Manager.getEventAtPos uses. For a
single-column event this is just canvasRect; for a spanning event it is
any covered column's segment, so the event is reachable from any column it
crosses.
The drag a press at gridPos (grid space) would begin: within 8px of the
top edge resizes from the top, within 8px of the bottom resizes from the
bottom, anywhere else moves the body. Shared by startDrag and the
hover-cursor hit test (Manager.dragTypeAt) so the cursor shown over an
event matches the drag a press there would actually start.
Recomputes the geometry and text wrapping after columnIndex/columnCount
(or, for a spanning event, its _spanColumns placement) change. Manager
calls this once a day's overlap layout is known, so the event occupies its
narrowed sub-column instead of the full day-column.
Records the sub-column (index of count) this spanning event was given
in column's overlap cluster (SpanOverlap.split). Manager calls this
per covered column while packing; relayout then rebuilds the geometry.
