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NAME
wxMenu - Functions for wxMenu class
DESCRIPTION
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
DATA TYPES
wxMenu() = wx:wx_object()
EXPORTS
new() -> wxMenu()
Constructs a wxMenu object.
new(Options :: [Option]) -> wxMenu()
Types:
Option = {style, integer()}
Constructs a wxMenu object.
new(Title, Options :: [Option]) -> wxMenu()
Types:
Title = unicode:chardata()
Option = {style, integer()}
Constructs a wxMenu object with a title.
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.
append(This, MenuItem) -> wxMenuItem:wxMenuItem()
Types:
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
append(This, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
append(This, Id, Item, SubMenu) -> wxMenuItem:wxMenuItem()
append(This, Id, Item, SubMenu :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
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
append(This, Id, Item, SubMenu, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
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
appendCheckItem(This, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
appendCheckItem(This, Id, Item, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
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
appendRadioItem(This, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
appendRadioItem(This, Id, Item, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
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
appendSeparator(This) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Adds a separator to the end of the menu.
See: append/5, insertSeparator/2
break(This) -> ok
Types:
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.
check(This, Id, Check) -> ok
Types:
This = wxMenu()
Id = integer()
Check = boolean()
Checks or unchecks the menu item.
See: isChecked/2
delete(This, Id) -> boolean()
delete(This, Item) -> boolean()
Types:
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
'Destroy'(This, Id) -> boolean()
'Destroy'(This, Item) -> boolean()
Types:
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
enable(This, Id, Enable) -> ok
Types:
This = wxMenu()
Id = integer()
Enable = boolean()
Enables or disables (greys out) a menu item.
See: isEnabled/2
findItem(This, Id) -> wxMenuItem:wxMenuItem()
findItem(This, ItemString) -> integer()
Types:
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.
findItemByPosition(This, Position) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Position = integer()
Returns the wxMenuItem given a position in the menu.
getHelpString(This, Id) -> unicode:charlist()
Types:
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
getLabel(This, Id) -> unicode:charlist()
Types:
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
getMenuItemCount(This) -> integer()
Types:
This = wxMenu()
Returns the number of items in the menu.
getMenuItems(This) -> [wxMenuItem:wxMenuItem()]
Types:
This = wxMenu()
getTitle(This) -> unicode:charlist()
Types:
This = wxMenu()
Returns the title of the menu.
See: setTitle/2
insert(This, Pos, Id) -> wxMenuItem:wxMenuItem()
insert(This, Pos, MenuItem) -> wxMenuItem:wxMenuItem()
Types:
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.
See: append/5, prepend/5
insert(This, Pos, Id, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = 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.
See: append/5, prepend/5
insert(This, Pos, Id, Text, Submenu) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = Id = integer()
Text = unicode:chardata()
Submenu = wxMenu()
insert(This, Pos, Id, Text, Submenu, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = 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
insertCheckItem(This, Pos, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = Id = integer()
Item = unicode:chardata()
insertCheckItem(This, Pos, Id, Item, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = Id = integer()
Item = unicode:chardata()
Option = {help, unicode:chardata()}
Inserts a checkable item at the given position.
See: insert/6, appendCheckItem/4
insertRadioItem(This, Pos, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = Id = integer()
Item = unicode:chardata()
insertRadioItem(This, Pos, Id, Item, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = Id = integer()
Item = unicode:chardata()
Option = {help, unicode:chardata()}
Inserts a radio item at the given position.
See: insert/6, appendRadioItem/4
insertSeparator(This, Pos) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Pos = integer()
Inserts a separator at the given position.
See: insert/6, appendSeparator/1
isChecked(This, Id) -> boolean()
Types:
This = wxMenu()
Id = integer()
Determines whether a menu item is checked.
Return: true if the menu item is checked, false otherwise.
See: check/3
isEnabled(This, Id) -> boolean()
Types:
This = wxMenu()
Id = integer()
Determines whether a menu item is enabled.
Return: true if the menu item is enabled, false otherwise.
See: enable/3
prepend(This, Id) -> wxMenuItem:wxMenuItem()
prepend(This, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Item = wxMenuItem:wxMenuItem()
Inserts the given item at position 0, i.e. before all the other existing items.
See: append/5, insert/6
prepend(This, Id, Options :: [Option]) -> wxMenuItem:wxMenuItem()
Types:
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.
See: append/5, insert/6
prepend(This, Id, Text, Submenu) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Text = unicode:chardata()
Submenu = wxMenu()
prepend(This, Id, Text, Submenu, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
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
prependCheckItem(This, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
prependCheckItem(This, Id, Item, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
Option = {help, unicode:chardata()}
Inserts a checkable item at position 0.
See: prepend/5, appendCheckItem/4
prependRadioItem(This, Id, Item) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
prependRadioItem(This, Id, Item, Options :: [Option]) ->
wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Id = integer()
Item = unicode:chardata()
Option = {help, unicode:chardata()}
Inserts a radio item at position 0.
See: prepend/5, appendRadioItem/4
prependSeparator(This) -> wxMenuItem:wxMenuItem()
Types:
This = wxMenu()
Inserts a separator at position 0.
See: prepend/5, appendSeparator/1
remove(This, Id) -> wxMenuItem:wxMenuItem()
remove(This, Item) -> wxMenuItem:wxMenuItem()
Types:
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.
setHelpString(This, Id, HelpString) -> ok
Types:
This = wxMenu()
Id = integer()
HelpString = unicode:chardata()
Sets an item's help string.
See: getHelpString/2
setLabel(This, Id, Label) -> ok
Types:
This = wxMenu()
Id = integer()
Label = unicode:chardata()
Sets the label of a menu item.
See: append/5, getLabel/2
setTitle(This, Title) -> ok
Types:
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