SpreadsheetCell extends DataGridCell
The cell element for a Spreadsheet. A focusable identity/styling shell
over DataGridCell: selection painting, editing, and keyboard navigation are
all driven by the Spreadsheet controller against the row/column model
(off-screen cells don't exist, which is why the Spreadsheet's cell-centric model
doesn't fit). Its main role is a distinct tag for the CSS selectors / cellSelector;
it also reflects the per-record readonly state, which is a property of the cell's
binding rather than the selection (see SpreadsheetCell#bind).
Constructor
new SpreadsheetCell()
Instance Methods
bind()
Bind this (recycled) cell to a record and reflect the per-record readonly state.
readonly is a function of (record, column), so it only changes when a pooled
cell is re-pointed at a different record — i.e. here, once per record entering the
virtual window — not on every selection change. super.bind resets the class list
to column.class, so the readonly class is (re)applied afterwards. Only
otherwise-editable columns reflect the gate; an editable: false column is already
non-editable on its own.
Detach this cell: de-register from its column, wipe all per-binding state so the pooled element is clean, and return it to the grid's cell pool. Mirrors DataGridRow#unmount.
