menu constant
A MethodChannel for platform menu specification and control.
The following outgoing method is defined for this channel (invoked using OptionalMethodChannel.invokeMethod):
Menu.setMenus
: sends the configuration of the platform menu, including labels, enable/disable information, and unique integer identifiers for each menu item. The configuration is sent as aMap<String, Object?>
encoding the list of top level menu items in window "0", which each have a hierarchy ofMap<String, Object?>
containing the required data, sent via a StandardMessageCodec. It is typically generated from a list of PlatformMenuItems, and ends up looking like this example:
Map<String, Object?> menu = <String, Object?>{
'0': <Map<String, Object?>>[
<String, Object?>{
'id': 1,
'label': 'First Menu Label',
'enabled': true,
'children': <Map<String, Object?>>[
<String, Object?>{
'id': 2,
'label': 'Sub Menu Label',
'enabled': true,
},
],
},
],
};
The following incoming methods are defined for this channel (registered using MethodChannel.setMethodCallHandler).
-
Menu.selectedCallback
: Called when a menu item is selected, along with the unique ID of the menu item selected. -
Menu.opened
: Called when a submenu is opened, along with the unique ID of the submenu. -
Menu.closed
: Called when a submenu is closed, along with the unique ID of the submenu.
See also:
- DefaultPlatformMenuDelegate, which uses this channel.
Implementation
static const MethodChannel menu = OptionalMethodChannel('flutter/menu');