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demo D130

Header context menu

Right-click a heading. The menu, not the rendering

header:contextmenu

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The configuration

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.13.0/lattice-grid.min.css">
<script src="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.13.0/lattice-grid.min.js"></script>

<div id="grid" style="height: 540px"></div>

<script>
  const grid = LatticeGrid.createGrid(document.getElementById('grid'), {
    rowKey: 'id',
    selection: 'multiple',
    toolPanel: {
      side: 'left',
      panels: ['columns', 'filters', 'views', 'quick'],
      actions: ['undo', 'redo', 'export', 'restore', 'maximise'],
      exportName: 'lattice-demo',
    },
    columns: [
      { field: 'service', title: 'Service', layout: { pin: 'start', width: 160 } },
      { field: 'team', title: 'Team', layout: { width: 130, lockVisible: true }, filter: { type: 'set' } },
      { field: 'owner', title: 'Owner', filter: { type: 'set' } },
      { field: 'headcount', title: 'Headcount', type: 'number', total: 'sum' },
      { field: 'monthlyCost', title: 'Monthly cost', type: 'number',
        format: { style: 'currency', currency: 'USD' }, total: 'sum' },
      { field: 'budget', title: 'Budget', type: 'number',
        format: { style: 'currency', currency: 'USD' }, total: 'sum' },
    ],
    rows,  // service records
  });
</script>

Right-clicking a column heading for a menu of column-level actions

A context menu attached to the header row gives a user a place to act on a column as a whole, separate from the cell context menu that acts on a single value. Sorting, pinning, hiding, and grouping are the operations that belong here: they change the shape of the table rather than the content of a record, and putting them behind a right-click keeps the header free of icon clutter. Any JavaScript data grid with a dense set of columns benefits from this split, since a toolbar button for every column operation would not fit above a wide table, while a menu scoped to the column under the pointer scales to however many columns are configured.

Lattice Grid exposes the interaction through the header:contextmenu event, fired with the column definition and the triggering event, so a host application can build its own menu contents, filter which actions appear per column, or suppress the menu on columns marked non-configurable. The default menu closes on outside click, on Escape, and after an item is chosen, returning focus to the header cell that opened it. It is reachable without a mouse: the context-menu key and Shift+F10 open it on a focused header, and the menu itself is a role="menu" with arrow-key navigation between items.

How do you open a column’s context menu without a mouse?

Focus the column header with Tab or the arrow keys, then press the keyboard context-menu key or Shift+F10. Lattice Grid opens the same menu a right-click would, positioned against the focused header cell, with arrow-key navigation between items and Escape to dismiss it.

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