View Source wxMenu (wx v2.4.2)
Functions for wxMenu class
A menu is a popup (or pull down) list of items, one of which may be selected before the menu goes away (clicking elsewhere dismisses the menu). Menus may be used to construct either menu bars or popup menus.
A menu item has an integer ID associated with it which can be used to identify
the selection, or to change the menu item in some way. A menu item with a
special identifier wxID_SEPARATOR
is a separator item and doesn't have an
associated command but just makes a separator line appear in the menu.
Note: Please note that wxID_ABOUT
and wxID_EXIT
are predefined by wxWidgets
and have a special meaning since entries using these IDs will be taken out of
the normal menus under macOS and will be inserted into the system menu
(following the appropriate macOS interface guideline).
Menu items may be either normal
items, check
items or radio
items. Normal
items don't have any special properties while the check items have a boolean
flag associated to them and they show a checkmark in the menu when the flag is
set. wxWidgets automatically toggles the flag value when the item is clicked and
its value may be retrieved using either isChecked/2
method of wxMenu
or
wxMenuBar
itself or by using wxEvent::IsChecked when you get the menu
notification for the item in question.
The radio items are similar to the check items except that all the other items in the same radio group are unchecked when a radio item is checked. The radio group is formed by a contiguous range of radio items, i.e. it starts at the first item of this kind and ends with the first item of a different kind (or the end of the menu). Notice that because the radio groups are defined in terms of the item positions inserting or removing the items in the menu containing the radio items risks to not work correctly.
Allocation strategy
All menus must be created on the heap
because all menus attached to a menubar
or to another menu will be deleted by their parent when it is deleted. The only
exception to this rule are the popup menus (i.e. menus used with
wxWindow:popupMenu/4
) as wxWidgets does not destroy them to allow reusing the
same menu more than once. But the exception applies only to the menus themselves
and not to any submenus of popup menus which are still destroyed by wxWidgets as
usual and so must be heap-allocated.
As the frame menubar is deleted by the frame itself, it means that normally all menus used are deleted automatically.
Event handling
Event handlers for the commands generated by the menu items can be connected
directly to the menu object itself using wxEvtHandler::Bind()
(not implemented
in wx). If this menu is a submenu of another one, the events from its items can
also be processed in the parent menu and so on, recursively.
If the menu is part of a menu bar, then events can also be handled in
wxMenuBar
object.
Finally, menu events can also be handled in the associated window, which is
either the wxFrame
associated with the menu bar this menu belongs to or the
window for which wxWindow:popupMenu/4
was called for the popup menus.
See overview_events_bind for how to bind event handlers to the various objects.
See: wxMenuBar
, wxWindow:popupMenu/4
,
Overview events,
wxFileHistory
(not implemented in wx)
This class is derived (and can use functions) from: wxEvtHandler
wxWidgets docs: wxMenu
Summary
Functions
Adds a menu item object.
Adds a menu item.
Adds a submenu.
Adds a checkable item to the end of the menu.
Adds a radio item to the end of the menu.
Adds a separator to the end of the menu.
Inserts a break in a menu, causing the next appended item to appear in a new column.
Checks or unchecks the menu item.
Deletes the menu item from the menu.
Deletes the menu item from the menu.
Destructor, destroying the menu.
Enables or disables (greys out) a menu item.
Finds the menu id for a menu item string.
Returns the wxMenuItem
given a position in the menu.
Returns the help string associated with a menu item.
Returns a menu item label.
Returns the number of items in the menu.
Returns the title of the menu.
Inserts the given item
before the position pos
.
Inserts the given item
before the position pos
.
Inserts the given submenu
before the position pos
.
Inserts a checkable item at the given position.
Inserts a radio item at the given position.
Inserts a separator at the given position.
Determines whether a menu item is checked.
Determines whether a menu item is enabled.
Constructs a wxMenu
object.
Constructs a wxMenu
object with a title.
Inserts the given item
at position 0, i.e. before all the other existing
items.
Inserts the given item
at position 0, i.e. before all the other existing
items.
Inserts the given submenu
at position 0.
Inserts a checkable item at position 0.
Inserts a radio item at position 0.
Inserts a separator at position 0.
Removes the menu item from the menu but doesn't delete the associated C++ object.
Sets an item's help string.
Sets the label of a menu item.
Sets the title of the menu.
Types
-type wxMenu() :: wx:wx_object().
Functions
-spec append(This, MenuItem) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), MenuItem :: wxMenuItem:wxMenuItem().
Adds a menu item object.
This is the most generic variant of append/5
method because it may be used for
both items (including separators) and submenus and because you can also specify
various extra properties of a menu item this way, such as bitmaps and fonts.
Remark: See the remarks for the other append/5
overloads.
See: appendSeparator/1
, appendCheckItem/4
, appendRadioItem/4
,
AppendSubMenu()
(not implemented in wx), insert/6
, setLabel/3
,
getHelpString/2
, setHelpString/3
, wxMenuItem
-spec append(This, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata().
-spec append(This, Id, Item, SubMenu) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), SubMenu :: wxMenu(); (This, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()} | {kind, wx:wx_enum()}.
Adds a menu item.
Example:
or even better for stock menu items (see wxMenuItem:new/1
):
Remark: This command can be used after the menu has been shown, as well as on initial creation of a menu or menubar.
See: appendSeparator/1
, appendCheckItem/4
, appendRadioItem/4
,
AppendSubMenu()
(not implemented in wx), insert/6
, setLabel/3
,
getHelpString/2
, setHelpString/3
, wxMenuItem
-spec append(This, Id, Item, SubMenu, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), SubMenu :: wxMenu(), Option :: {help, unicode:chardata()}.
Adds a submenu.
Deprecated: This function is deprecated, use AppendSubMenu()
(not implemented
in wx) instead.
See: appendSeparator/1
, appendCheckItem/4
, appendRadioItem/4
,
AppendSubMenu()
(not implemented in wx), insert/6
, setLabel/3
,
getHelpString/2
, setHelpString/3
, wxMenuItem
-spec appendCheckItem(This, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata().
-spec appendCheckItem(This, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()}.
Adds a checkable item to the end of the menu.
See: append/5
, insertCheckItem/5
-spec appendRadioItem(This, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata().
-spec appendRadioItem(This, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()}.
Adds a radio item to the end of the menu.
All consequent radio items form a group and when an item in the group is checked, all the others are automatically unchecked.
Note: Radio items are not supported under wxMotif.
See: append/5
, insertRadioItem/5
-spec appendSeparator(This) -> wxMenuItem:wxMenuItem() when This :: wxMenu().
Adds a separator to the end of the menu.
See: append/5
, insertSeparator/2
-spec break(This) -> ok when This :: wxMenu().
Inserts a break in a menu, causing the next appended item to appear in a new column.
This function only actually inserts a break in wxMSW and does nothing under the other platforms.
Checks or unchecks the menu item.
See: isChecked/2
-spec 'Destroy'(This, Id) -> boolean() when This :: wxMenu(), Id :: integer(); (This, Item) -> boolean() when This :: wxMenu(), Item :: wxMenuItem:wxMenuItem().
Deletes the menu item from the menu.
If the item is a submenu, it will be deleted. Use remove/2
if you want to keep
the submenu (for example, to reuse it later).
See: findItem/2
, delete/2
, remove/2
-spec delete(This, Id) -> boolean() when This :: wxMenu(), Id :: integer(); (This, Item) -> boolean() when This :: wxMenu(), Item :: wxMenuItem:wxMenuItem().
Deletes the menu item from the menu.
If the item is a submenu, it will not
be deleted. Use 'Destroy'/2
if you
want to delete a submenu.
See: findItem/2
, 'Destroy'/2
, remove/2
-spec destroy(This :: wxMenu()) -> ok.
Destructor, destroying the menu.
Note: Under Motif, a popup menu must have a valid parent (the window it was last
popped up on) when being destroyed. Therefore, make sure you delete or re-use
the popup menu before
destroying the parent window. Re-use in this context
means popping up the menu on a different window from last time, which causes an
implicit destruction and recreation of internal data structures.
Enables or disables (greys out) a menu item.
See: isEnabled/2
-spec findItem(This, Id) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(); (This, ItemString) -> integer() when This :: wxMenu(), ItemString :: unicode:chardata().
Finds the menu id for a menu item string.
Return: Menu item identifier, or wxNOT_FOUND if none is found.
Remark: Any special menu codes are stripped out of source and target strings before matching.
-spec findItemByPosition(This, Position) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Position :: integer().
Returns the wxMenuItem
given a position in the menu.
-spec getHelpString(This, Id) -> unicode:charlist() when This :: wxMenu(), Id :: integer().
Returns the help string associated with a menu item.
Return: The help string, or the empty string if there is no help string or the item was not found.
See: setHelpString/3
, append/5
-spec getLabel(This, Id) -> unicode:charlist() when This :: wxMenu(), Id :: integer().
Returns a menu item label.
Return: The item label, or the empty string if the item was not found.
See: GetLabelText()
(not implemented in wx), setLabel/3
Returns the number of items in the menu.
-spec getMenuItems(This) -> [wxMenuItem:wxMenuItem()] when This :: wxMenu().
-spec getTitle(This) -> unicode:charlist() when This :: wxMenu().
Returns the title of the menu.
See: setTitle/2
-spec insert(This, Pos, Id) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(); (This, Pos, MenuItem) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), MenuItem :: wxMenuItem:wxMenuItem().
Inserts the given item
before the position pos
.
Inserting the item at position getMenuItemCount/1
is the same as appending it.
-spec insert(This, Pos, Id, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Option :: {text, unicode:chardata()} | {help, unicode:chardata()} | {kind, wx:wx_enum()}.
Inserts the given item
before the position pos
.
Inserting the item at position getMenuItemCount/1
is the same as appending it.
-spec insert(This, Pos, Id, Text, Submenu) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Text :: unicode:chardata(), Submenu :: wxMenu().
-spec insert(This, Pos, Id, Text, Submenu, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Text :: unicode:chardata(), Submenu :: wxMenu(), Option :: {help, unicode:chardata()}.
Inserts the given submenu
before the position pos
.
text
is the text shown in the menu for it and help
is the help string shown
in the status bar when the submenu item is selected.
See: AppendSubMenu()
(not implemented in wx), prepend/5
-spec insertCheckItem(This, Pos, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Item :: unicode:chardata().
-spec insertCheckItem(This, Pos, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()}.
Inserts a checkable item at the given position.
See: insert/6
, appendCheckItem/4
-spec insertRadioItem(This, Pos, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Item :: unicode:chardata().
-spec insertRadioItem(This, Pos, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()}.
Inserts a radio item at the given position.
See: insert/6
, appendRadioItem/4
-spec insertSeparator(This, Pos) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Pos :: integer().
Inserts a separator at the given position.
See: insert/6
, appendSeparator/1
Determines whether a menu item is checked.
Return: true if the menu item is checked, false otherwise.
See: check/3
Determines whether a menu item is enabled.
Return: true if the menu item is enabled, false otherwise.
See: enable/3
-spec new() -> wxMenu().
Constructs a wxMenu
object.
Constructs a wxMenu
object.
-spec new(Title, [Option]) -> wxMenu() when Title :: unicode:chardata(), Option :: {style, integer()}.
Constructs a wxMenu
object with a title.
-spec prepend(This, Id) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(); (This, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Item :: wxMenuItem:wxMenuItem().
Inserts the given item
at position 0, i.e. before all the other existing
items.
-spec prepend(This, Id, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Option :: {text, unicode:chardata()} | {help, unicode:chardata()} | {kind, wx:wx_enum()}.
Inserts the given item
at position 0, i.e. before all the other existing
items.
-spec prepend(This, Id, Text, Submenu) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Text :: unicode:chardata(), Submenu :: wxMenu().
-spec prepend(This, Id, Text, Submenu, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Text :: unicode:chardata(), Submenu :: wxMenu(), Option :: {help, unicode:chardata()}.
Inserts the given submenu
at position 0.
See: AppendSubMenu()
(not implemented in wx), insert/6
-spec prependCheckItem(This, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata().
-spec prependCheckItem(This, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()}.
Inserts a checkable item at position 0.
See: prepend/5
, appendCheckItem/4
-spec prependRadioItem(This, Id, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata().
-spec prependRadioItem(This, Id, Item, [Option]) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(), Item :: unicode:chardata(), Option :: {help, unicode:chardata()}.
Inserts a radio item at position 0.
See: prepend/5
, appendRadioItem/4
-spec prependSeparator(This) -> wxMenuItem:wxMenuItem() when This :: wxMenu().
Inserts a separator at position 0.
See: prepend/5
, appendSeparator/1
-spec remove(This, Id) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Id :: integer(); (This, Item) -> wxMenuItem:wxMenuItem() when This :: wxMenu(), Item :: wxMenuItem:wxMenuItem().
Removes the menu item from the menu but doesn't delete the associated C++ object.
This allows you to reuse the same item later by adding it back to the menu (especially useful with submenus).
Return: A pointer to the item which was detached from the menu.
-spec setHelpString(This, Id, HelpString) -> ok when This :: wxMenu(), Id :: integer(), HelpString :: unicode:chardata().
Sets an item's help string.
See: getHelpString/2
-spec setLabel(This, Id, Label) -> ok when This :: wxMenu(), Id :: integer(), Label :: unicode:chardata().
Sets the label of a menu item.
See: append/5
, getLabel/2
-spec setTitle(This, Title) -> ok when This :: wxMenu(), Title :: unicode:chardata().
Sets the title of the menu.
Remark: Notice that you can only call this method directly for the popup menus,
to change the title of a menu that is part of a menu bar you need to use
wxMenuBar:setLabelTop/3
.
See: getTitle/1