\variable QStyleOptionGraphicsItem::exposedRect More...

#include <qstyleoption.h>

Inheritance diagram for QStyleHintReturn:

Collaboration diagram for QStyleHintReturn:

Public Types
enum	HintReturnType { SH_Default =0xf000 , SH_Mask , SH_Variant }
	\value SH_Default QStyleHintReturn \value SH_Mask \l QStyle::SH_RubberBand_Mask QStyle::SH_FocusFrame_Mask \value SH_Variant \l QStyle::SH_TextControl_FocusIndicatorTextCharFormat More...

enum	StyleOptionType { Type = SH_Default }
	This enum is used to hold information about the type of the style option, and is defined for each QStyleHintReturn subclass. More...

enum	StyleOptionVersion { Version = 1 }
	This enum is used to hold information about the version of the style option, and is defined for each QStyleHintReturn subclass. More...

Public Member Functions
	QStyleHintReturn (int version=QStyleOption::Version, int type=SH_Default)
	\variable QStyleHintReturn::type

	~QStyleHintReturn ()

Public Attributes
int	version

int	type

Related Symbols
(Note that these are not member symbols.)
template< typename T > T	qstyleoption_cast (const QStyleHintReturn *hint)
	Returns a T or \nullptr depending on the \l{QStyleHintReturn::type}{type} and \l{QStyleHintReturn::version}{version} of hint.

template< typename T > T	qstyleoption_cast (QStyleHintReturn *hint)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Detailed Description

\variable QStyleOptionGraphicsItem::exposedRect

the exposed rectangle, in item coordinates

Make use of this rectangle to speed up item drawing when only parts of the item are exposed. If the whole item is exposed, this rectangle will be the same as QGraphicsItem::boundingRect().

This member is only initialized for items that have the QGraphicsItem::ItemUsesExtendedStyleOption flag set.

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

\inmodule QtWidgets

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.

Definition at line 689 of file qstyleoption.h.

Member Enumeration Documentation

◆ HintReturnType

enum QStyleHintReturn::HintReturnType

\value SH_Default QStyleHintReturn \value SH_Mask \l QStyle::SH_RubberBand_Mask QStyle::SH_FocusFrame_Mask \value SH_Variant \l QStyle::SH_TextControl_FocusIndicatorTextCharFormat

Enumerator
SH_Default
SH_Mask
SH_Variant

Definition at line 691 of file qstyleoption.h.

◆ StyleOptionType

enum QStyleHintReturn::StyleOptionType

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

\value Type The type of style option provided (\l 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

Enumerator
Type

Definition at line 695 of file qstyleoption.h.

◆ StyleOptionVersion

enum QStyleHintReturn::StyleOptionVersion

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

\value Version 1

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

See also: StyleOptionType

Enumerator
Version

Definition at line 696 of file qstyleoption.h.

Constructor & Destructor Documentation

◆ QStyleHintReturn()

QStyleHintReturn::QStyleHintReturn	(	int	version = `QStyleOption::Version`,
		int	type = `SH_Default`
	)

\variable QStyleHintReturn::type

the type of the style hint container

See also: HintReturnType

\variable QStyleHintReturn::version

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 do not need to check it.

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, QStyleOption::type

Definition at line 3676 of file qstyleoption.cpp.

◆ ~QStyleHintReturn()

QStyleHintReturn::~QStyleHintReturn ( )

Definition at line 3685 of file qstyleoption.cpp.

Friends And Related Symbol Documentation

◆ qstyleoption_cast() [1/2]

template< typename T > T qstyleoption_cast< T > ( const QStyleHintReturn * hint )

Example:

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, QStyleHintReturn::version

Definition at line 728 of file qstyleoption.h.

References hint(), and SH_Default.

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◆ qstyleoption_cast() [2/2]

template< typename T > T qstyleoption_cast< T > ( QStyleHintReturn * hint )

Returns a T or \nullptr depending on the type of hint.

Definition at line 738 of file qstyleoption.h.

References hint(), and SH_Default.

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Member Data Documentation

◆ type

int QStyleHintReturn::type

Definition at line 702 of file qstyleoption.h.

◆ version

int QStyleHintReturn::version

Definition at line 701 of file qstyleoption.h.

The documentation for this class was generated from the following files:

qtbase/src/widgets/styles/qstyleoption.h
qtbase/src/widgets/styles/qstyleoption.cpp

Public Types

Public Member Functions

Public Attributes

Related Symbols