wxMenu(3) Erlang Module Definition wxMenu(3)
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. Nor-
mal 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 nor-
mally all menus used are deleted automatically.
Event handling
Event handlers for the commands generated by the menu items can be con-
nected 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. There-
fore, make sure you delete or re-use the popup menu before
destroying the parent window. Re-use in this context means pop-
ping 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 asso-
ciated 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
wxWidgets team. wx 2.1.1 wxMenu(3)