Qt:Документация 4.3.2/qstylehintreturn

Материал из Wiki.crossplatform.ru

Перейти к: навигация, поиск
40px Внимание: Актуальная версия перевода документации находится здесь

__NOTOC__

Image:qt-logo.png

Главная · Все классы · Основные классы · Классы по группам · Модули · Функции

Image:trolltech-logo.png

Содержание

[править] QStyleHintReturn Class Reference
[модуль QtGui ]

The QStyleHintReturn class provides style hints that return more than basic data types. Далее...

 #include <QStyleHintReturn>

Inherited by QStyleHintReturnMask and QStyleHintReturnVariant.

[править] Открытые типы

[править] Открытые функции

[править] Public Variables

[править] Связанные не-члены


[править] Подробное описание

The QStyleHintReturn class provides style hints that return more than basic data types.

QStyleHintReturn and its subclasses are used to pass information from a style back to the querying widget. This is most useful when the return value from QStyle::styleHint() does not provide enough detail; for example, when a mask is to be returned.


[править] Описание типов

[править]
enum QStyleHintReturn::HintReturnType

Константа Значение Описание
QStyleHintReturn::SH_Default 0xf000 QStyleHintReturn
QStyleHintReturn::SH_Mask  ? QStyle::SH_RubberBand_Mask QStyle::SH_FocusFrame_Mask
QStyleHintReturn::SH_Variant  ? QStyle::SH_TextControl_FocusIndicatorTextCharFormat

[править]
enum QStyleHintReturn::StyleOptionType

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


Константа Значение Описание
QStyleHintReturn::Type SH_Default The type of style option provided ( SH_Default for this class).

The type is used internally by QStyleHintReturn, 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 QStyleHintReturn subclass and your own styles.

See also StyleOptionVersion.

[править]
enum QStyleHintReturn::StyleOptionVersion

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


Константа Значение Описание
QStyleHintReturn::Version 1 1

The version is used by QStyleHintReturn subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast(), you normally don't need to check it.

See also StyleOptionType.


[править] Описание функций-членов

[править]
QStyleHintReturn::QStyleHintReturn ( int version = QStyleOption::Version, int type = SH_Default )

Constructs a QStyleHintReturn with version version and type type.

The version has no special meaning for QStyleHintReturn; it can be used by subclasses to distinguish between different version of the same hint type.

See also QStyleOption::version and QStyleOption::type.


[править] Member Variable Documentation

[править]
int QStyleHintReturn::type

This variable holds the type of the style hint container.

See also HintReturnType.

[править]
int QStyleHintReturn::version

This variable holds the version of the style hint return container.

This value can be used by subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast<T>(), you normally don't need to check it.


[править] Связанные не-члены

[править]
T qstyleoption_cast ( const QStyleHintReturn * hint )

Эта перегруженная функция предоставлена для удобства.

Returns a T or 0 depending on the type and version of hint.

Пример:

 int MyStyle::styleHint(StyleHint stylehint, const QStyleOption *opt,
                        const QWidget *widget, QStyleHintReturn* returnData) const;
 {
     if (stylehint == SH_RubberBand_Mask) {
         const QStyleHintReturnMask *maskReturn =
                 qstyleoption_cast<const QStyleHintReturnMask *>(hint);
         if (maskReturn) {
             ...
         }
     }
     ...
 }

See also QStyleHintReturn::type and QStyleHintReturn::version.

[править]
T qstyleoption_cast ( QStyleHintReturn * hint )

Эта перегруженная функция предоставлена для удобства.

Returns a T or 0 depending on the type of hint.



Copyright © 2007 Trolltech Trademarks
Qt 4.3.2