Alert dialog

ui.AlertDialog asks about something important over the window while a *bool is true, as AppKit's alerts: a title, a message, and buttons, the last of which is the default, in the accent color, with the focus, which Enter clicks. Escape clicks a button labeled Cancel, if any; a click outside the alert does nothing. It returns the index of the button clicked, in the frame it is, which closes the alert, and -1 otherwise.

if ui.Button(c, "Delete").Clicked() {
	app.asking = true
}
switch ui.AlertDialog(c, &app.asking, "Delete “Notes”?", "You can't undo this.", "Cancel", "Delete") {
case 1:
	app.delete()
}

For a dialog of your own content, use a dialog; for a choice the user can undo, act at once and offer it in a toast.

Accessibility

Assistive technology sees an alert dialog named by its title and described by its message, with the focus on its default button.