demo D130
Header context menu
Right-click a heading. The menu, not the rendering
header:contextmenu
The configuration
import * as ng from '@angular/core';
import { Component } from '@angular/core';
import { bootstrapApplication } from '@angular/platform-browser';
import { createGrid } from '@toclocoinc/lattice-grid';
import '@toclocoinc/lattice-grid/css';
import createLatticeGrid from '@toclocoinc/lattice-grid/modules/angular';
const { LatticeGridComponent } = createLatticeGrid({ ng, createGrid });
// The header menu opens on right-click. Team is marked lockVisible, so it
// stays out of the hide action the menu offers.
const 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' },
];
const rows = [/* service records */];
@Component({
selector: 'app-root',
standalone: true,
imports: [LatticeGridComponent],
template: '<lattice-grid [config]="grid" style="display:block;height:540px"></lattice-grid>',
})
export class AppComponent {
grid = {
rowKey: 'id',
selection: 'multiple',
toolPanel: { side: 'left', panels: ['columns', 'filters', 'views', 'quick'],
actions: ['undo', 'redo', 'export', 'restore', 'maximise'], exportName: 'lattice-demo' },
columns: columns,
rows: rows,
};
}
bootstrapApplication(AppComponent);
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.