Show a popup menu that contains the items at position. If initialValue
is specified then the first item with a matching value will be highlighted
and the value of position implies where the left, center point of the
highlighted item should appear. If initialValue is not specified then
position specifies the menu's origin.
The context argument is used to look up a Navigator to show the menu and
a Theme to use for the menu.
The elevation argument specifies the z-coordinate at which to place the
menu. The following elevations have defined shadows: 1, 2, 3, 4, 6, 8, 9,
12, 16, 24. The elevation defaults to 8, the appropriate elevation for popup
menus.
Source
Future<dynamic/*=T*/> showMenu/*<T>*/({
BuildContext context,
RelativeRect position,
List<PopupMenuEntry<dynamic/*=T*/>> items,
dynamic/*=T*/ initialValue,
int elevation: 8
}) {
assert(context != null);
assert(items != null && items.isNotEmpty);
return Navigator.push(context, new _PopupMenuRoute<dynamic/*=T*/>(
position: position,
items: items,
initialValue: initialValue,
elevation: elevation,
theme: Theme.of(context, shadowThemeOnly: true),
));
}