QStyleOptionMenuItem Class Reference

The QStyleOptionMenuItem class is used to describe the parameter necessary for drawing a menu item. Далее...

 #include <QStyleOptionMenuItem>

Унаследован от: QStyleOption.

Список всех членов, включая унаследованные

Открытые типы

enum	CheckType { NotCheckable, Exclusive, NonExclusive }
enum	MenuItemType { Normal, DefaultItem, Separator, SubMenu, ..., EmptyArea }
enum	StyleOptionType { Type }
enum	StyleOptionVersion { Version }

Открытые функции

	QStyleOptionMenuItem ()
	QStyleOptionMenuItem ( const QStyleOptionMenuItem & other )

2 открытых функции, унаследованных от QStyleOption

Public Variables

CheckType	checkType
bool	checked
QFont	font
QIcon	icon
int	maxIconWidth
bool	menuHasCheckableItems
MenuItemType	menuItemType
QRect	menuRect
int	tabWidth
QString	text

7 открытых функций, унаследованных от QStyleOption

Подробное описание

The QStyleOptionMenuItem class is used to describe the parameter necessary for drawing a menu item.

QStyleOptionMenuItem contains all the information that QStyle functions need to draw the menu items from QMenu. It is also used for drawing other menu-related widgets.

For performance reasons, the access to the member variables is direct (i.e., using the . or -> operator). This low-level feel makes the structures straightforward to use and emphasizes that these are simply parameters used by the style functions.

For an example demonstrating how style options can be used, see the Styles example.

See also QStyleOption.

Описание типов-членов

enum QStyleOptionMenuItem::CheckType

This enum is used to indicate whether or not a check mark should be drawn for the item, or even if it should be drawn at all.

Константа	Значение	Описание
`QStyleOptionMenuItem::NotCheckable`	`0`	The item is not checkable.
`QStyleOptionMenuItem::Exclusive`	`1`	The item is an exclusive check item (like a radio button).
`QStyleOptionMenuItem::NonExclusive`	`2`	The item is a non-exclusive check item (like a check box).

enum QStyleOptionMenuItem::MenuItemType

This enum indicates the type of menu item that the structure describes.

Константа	Значение	Описание
`QStyleOptionMenuItem::Normal`	`0`	A normal menu item.
`QStyleOptionMenuItem::DefaultItem`	`1`	A menu item that is the default action as specified with QMenu::defaultAction().
`QStyleOptionMenuItem::Separator`	`2`	A menu separator.
`QStyleOptionMenuItem::SubMenu`	`3`	Indicates the menu item points to a sub-menu.
`QStyleOptionMenuItem::Scroller`	`4`	A popup menu scroller (currently only used on Mac OS X).
`QStyleOptionMenuItem::TearOff`	`5`	A tear-off handle for the menu.
`QStyleOptionMenuItem::Margin`	`6`	The margin of the menu.
`QStyleOptionMenuItem::EmptyArea`	`7`	The empty area of the menu.

See also menuItemType.

enum QStyleOptionMenuItem::StyleOptionType

This enum is used to hold information about the type of the style option, and is defined for each QStyleOption subclass.

Константа	Значение	Описание
`QStyleOptionMenuItem::Type`	`SO_MenuItem`	The type of style option provided (SO_MenuItem for this class).

The type is used internally by QStyleOption, its subclasses, and qstyleoption_cast() to determine the type of style option. In general you do not need to worry about this unless you want to create your own QStyleOption subclass and your own styles.

Смотрите также StyleOptionVersion.

enum QStyleOptionMenuItem::StyleOptionVersion

This enum is used to hold information about the version of the style option, and is defined for each QStyleOption subclass.

Константа	Значение	Описание
`QStyleOptionMenuItem::Version`	`1`	1

The version is used by QStyleOption subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast(), you normally do not need to check it.

Смотрите также StyleOptionType.

Описание функций-членов

QStyleOptionMenuItem::QStyleOptionMenuItem ()

Constructs a QStyleOptionMenuItem, initializing the members variables to their default values.

QStyleOptionMenuItem::QStyleOptionMenuItem ( const QStyleOptionMenuItem & other )

Constructs a copy of the other style option.

Описание типов

CheckType QStyleOptionMenuItem::checkType

This variable holds the type of checkmark of the menu item.

The default value is NotCheckable.

See also CheckType.

bool QStyleOptionMenuItem::checked

This variable holds whether the menu item is checked or not.

Значение по умолчанию равно false.

QFont QStyleOptionMenuItem::font

This variable holds the font used for the menu item text.

This is the font that should be used for drawing the menu text minus the shortcut. The shortcut is usually drawn using the painter's font. By default, the application's default font is used.

QIcon QStyleOptionMenuItem::icon

This variable holds the icon for the menu item.

The default value is an empty icon, i.e. an icon with neither a pixmap nor a filename.

int QStyleOptionMenuItem::maxIconWidth

This variable holds the maximum icon width for the icon in the menu item.

This can be used for drawing the icon into the correct place or properly aligning items. The variable must be set regardless of whether or not the menu item has an icon. Значение по умолчанию равно 0.

bool QStyleOptionMenuItem::menuHasCheckableItems

This variable holds whether the menu as a whole has checkable items or not.

Значение по умолчанию равно true.

If this option is set to false, then the menu has no checkable items. This makes it possible for GUI styles to save some horizontal space that would normally be used for the check column.

MenuItemType QStyleOptionMenuItem::menuItemType

This variable holds the type of menu item.

The default value is Normal.

See also MenuItemType.

QRect QStyleOptionMenuItem::menuRect

This variable holds the rectangle for the entire menu.

The default value is a null rectangle, i.e. a rectangle with both the width and the height set to 0.

int QStyleOptionMenuItem::tabWidth

This variable holds the tab width for the menu item.

The tab width is the distance between the text of the menu item and the shortcut. Значение по умолчанию равно 0.

QString QStyleOptionMenuItem::text

This variable holds the text for the menu item.

Note that the text format is something like this "Menu text\tShortcut".

If the menu item doesn't have a shortcut, it will just contain the menu item's text. The default value is an empty string.

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