A menu bar consists of a list of pull-down menu items. You add menu items with insertItem(). For example, asuming that \fCmenubar\fR is a pointer to a TQMenuBar and \fCfilemenu\fR is a pointer to a TQPopupMenu, the following statement inserts the menu into the menu bar:
The ampersand in the menu item's text sets Alt+F as a shortcut for this menu. (You can use "&&" to get a real ampersand in the menu bar.)
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Items are either enabled or disabled. You toggle their state with setItemEnabled().
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There is no need to lay out a menu bar. It automatically sets its own geometry to the top of the parent widget and changes it appropriately whenever the parent is resized.
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Example of creating a menu bar with menu items (from menu/menu.cpp):
In most main window style applications you would use the menuBar() provided in TQMainWindow, adding TQPopupMenus to the menu bar and adding TQActions to the popup menus.
Menu items can have text and pixmaps (or iconsets), see the various insertItem() overloads, as well as separators, see insertSeparator(). You can also add custom menu items that are derived from QCustomMenuItem.
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Menu items may be removed with removeItem() and enabled or disabled with setItemEnabled().
TQMenuBar on Qt/Mac is a wrapper for using the system-wide menubar. If you have multiple menubars in one dialog the outermost menubar (normally inside a widget with widget flag WType_TopLevel) will be used for the system-wide menubar.
Note that arbitrary TQt widgets \fIcannot\fR be inserted into a TQMenuBar on the Mac because TQt uses Mac's native menus which don't support this functionality. This limitation does not apply to stand-alone TQPopupMenus.
Qt/Mac also provides a menubar merging feature to make TQMenuBar conform more closely to accepted Mac OS X menubar layout. The merging functionality is based on string matching the title of a TQPopupMenu entry. These strings are translated (using TQObject::tr()) in the "TQMenuBar" context. If an entry is moved its slots will still fire as if it was in the original place. The table below outlines the strings looked for and where the entry is placed if matched:
l - l. String matches Placement Notes about.* Application Menu | About If this entry is not found no About item will appear in the Application Menu config, options, setup, settings or preferences Application Menu | Preferences If this entry is not found the Settings item will be disabled quit or exit Application Menu | Quit If this entry is not found a default Quit item will be created to call
Normally you will connect each menu item to a single slot using TQMenuData::insertItem(), but sometimes you will want to connect several items to a single slot (most often if the user selects from an array). This signal is useful in such cases.
Returns the height that the menu would resize itself to if its parent (and hence itself) resized to the given \fImax_width\fR. This can be useful for simple layout tasks in which the height of the menu bar is needed after items have been inserted. See showimg/showimg.cpp for an example of the usage.
Normally, you will connect each menu item to a single slot using TQMenuData::insertItem(), but sometimes you will want to connect several items to a single slot (most often if the user selects from an array). This signal is useful in such cases.
The family of insertItem() functions inserts menu items into a popup menu or a menu bar.
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A menu item is usually either a text string or a pixmap, both with an optional icon or keyboard accelerator. For special cases it is also possible to insert custom items (see QCustomMenuItem) or even widgets into popup menus.
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Some insertItem() members take a popup menu as an additional argument. Use this to insert submenus into existing menus or pulldown menus into a menu bar.
This default version inserts a menu item with the text \fItext\fR, the accelerator key \fIaccel\fR, an id and an optional index and connects it to the slot \fImember\fR in the object \fIreceiver\fR.
The \fIid\fR specifies the identification number associated with the menu item. Note that only positive values are valid, as a negative value will make TQt select a unique id for the item.
Note that keyboard accelerators in TQt are not application-global, instead they are bound to a certain top-level window. For example, accelerators in TQPopupMenu items only work for menus that are associated with a certain window. This is true for popup menus that live in a menu bar since their accelerators will then be installed in the menu bar itself. This also applies to stand-alone popup menus that have a top-level widget in their parentWidget() chain. The menu will then install its accelerator object on that top-level widget. For all other cases use an independent QAccel object.
\fBWarning:\fR Be careful when passing a literal 0 to insertItem() because some C++ compilers choose the wrong overloaded function. Cast the 0 to what you mean, e.g. \fC(TQObject*)0\fR.
\fBWarning:\fR On Mac OS X, items that connect to a slot that are inserted into a menubar will not function as we use the native menubar that knows nothing about signals or slots. Instead insert the items into a popup menu and insert the popup menu into the menubar. This may be fixed in a future TQt version.
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with icon \fIicon\fR, text \fItext\fR, accelerator \fIaccel\fR, optional id \fIid\fR, and optional \fIindex\fR position. The menu item is connected it to the \fIreceiver\fR's \fImember\fR slot. The icon will be displayed to the left of the text in the item.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with pixmap \fIpixmap\fR, accelerator \fIaccel\fR, optional id \fIid\fR, and optional \fIindex\fR position. The menu item is connected it to the \fIreceiver\fR's \fImember\fR slot. The icon will be displayed to the left of the text in the item.
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To look best when being highlighted as a menu item, the pixmap should provide a mask (see QPixmap::mask()).
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with icon \fIicon\fR, pixmap \fIpixmap\fR, accelerator \fIaccel\fR, optional id \fIid\fR, and optional \fIindex\fR position. The icon will be displayed to the left of the pixmap in the item. The item is connected to the \fImember\fR slot in the \fIreceiver\fR object.
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To look best when being highlighted as a menu item, the pixmap should provide a mask (see QPixmap::mask()).
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with icon \fIicon\fR, text \fItext\fR, optional id \fIid\fR, and optional \fIindex\fR position. The icon will be displayed to the left of the text in the item.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with text \fItext\fR, submenu \fIpopup\fR, optional id \fIid\fR, and optional \fIindex\fR position.
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The \fIpopup\fR must be deleted by the programmer or by its parent widget. It is not deleted when this menu item is removed or when the menu is deleted.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with icon \fIicon\fR, text \fItext\fR, submenu \fIpopup\fR, optional id \fIid\fR, and optional \fIindex\fR position. The icon will be displayed to the left of the text in the item.
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The \fIpopup\fR must be deleted by the programmer or by its parent widget. It is not deleted when this menu item is removed or when the menu is deleted.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with icon \fIicon\fR, pixmap \fIpixmap\fR, optional id \fIid\fR, and optional \fIindex\fR position. The icon will be displayed to the left of the pixmap in the item.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with pixmap \fIpixmap\fR, submenu \fIpopup\fR, optional id \fIid\fR, and optional \fIindex\fR position.
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The \fIpopup\fR must be deleted by the programmer or by its parent widget. It is not deleted when this menu item is removed or when the menu is deleted.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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Inserts a menu item with icon \fIicon\fR, pixmap \fIpixmap\fR submenu \fIpopup\fR, optional id \fIid\fR, and optional \fIindex\fR position. The icon will be displayed to the left of the pixmap in the item.
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The \fIpopup\fR must be deleted by the programmer or by its parent widget. It is not deleted when this menu item is removed or when the menu is deleted.
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Returns the allocated menu identifier number (\fIid\fR if \fIid\fR >= 0).
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See also removeItem(), changeItem(), setAccel(), and connectItem().
If a widget is not focus-enabled (see TQWidget::isFocusEnabled()), the menu treats it as a separator; this means that the item is not selectable and will never get focus. In this way you can, for example, simply insert a QLabel if you need a popup menu with a title.
If the widget is focus-enabled it will get focus when the user traverses the popup menu with the arrow keys. If the widget does not accept \fCArrowUp\fR and \fCArrowDown\fR in its key event handler, the focus will move back to the menu when the respective arrow key is hit one more time. This works with a QLineEdit, for example. If the widget accepts the arrow key itself, it must also provide the possibility to put the focus back on the menu again by calling TQWidget::focusNextPrevChild(). Futhermore, if the embedded widget closes the menu when the user made a selection, this can be done safely by calling:
Inserts a separator at position \fIindex\fR, and returns the menu identifier number allocated to it. The separator becomes the last menu item if \fIindex\fR is negative.
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In a popup menu a separator is rendered as a horizontal line. In a Motif menu bar a separator is spacing, so the rest of the items (normally just "Help") are drawn right-justified. In a Windows menu bar separators are ignored (to comply with the Windows style guidelines).
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Examples:
.)l addressbook/mainwindow.cpp, menu/menu.cpp, progress/progress.cpp, qwerty/qwerty.cpp, scrollview/scrollview.cpp, showimg/showimg.cpp, and sound/sound.cpp.
The default popup orientation. By default, menus pop "down" the screen. By setting the property to TRUE, the menu will pop "up". You might call this for menus that are \fIbelow\fR the document to which they refer.
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If the menu would not fit on the screen, the other direction is used automatically.
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Set this property's value with setDefaultUp() and get this property's value with isDefaultUp().
.SH "Separator separator"
This property holds in which cases a menubar sparator is drawn.
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\fBThis property is obsolete.\fR It is provided to keep old source working. We strongly advise against using it in new code.
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Set this property's value with setSeparator() and get this property's value with separator().
