CngxContextMenuTrigger

Opens a CngxMenu-bearing popover at pointer coordinates in response to contextmenu (right-click) or Shift+F10 (keyboard equivalent).

Two inputs:

• cngxContextMenuTrigger: the CngxMenu (or any CngxMenuHost) the popover wraps.
• popover: the CngxPopover panel containing the menu. Must be marked [exclusive]="true" (default) so that opening this menu light-dismisses any other popover.

Anchoring uses a transient zero-size DOM element positioned at the pointer coords, set on the popover's anchorElement signal - virtual getBoundingClientRect objects are not yet supported as anchors, so the transient div is the workaround.

Touch-driven opening via long-press is deliberately out of scope for the initial commit; consumers can compose CngxLongPress against the same popover anchor pattern as a follow-up.

Dismissal#

Four sources close the menu by default: Escape, pointerdown outside both the popover and the trigger host, window blur, and document pointercancel. Window scroll is opt-in via withDismissOnScroll. Touch users get backdrop dismissal through the same pointerdown listener - no ESC dependency. The dismissal source that fired most recently is readable through lastDismissSource.

Override individual sources at app root with withDismissOnOutsideClick, withDismissOnScroll, withDismissOnBlur, or swap the whole handler via CNGX_MENU_DISMISS_HANDLER_FACTORY.

https://cngxjs.github.io/cngx/examples/#/common/interactive/context-menu/right-click-target-zone