Simplifies dynamically overriding QStyle elements. More...

Inheritance diagram for QProxyStyle:

Public Methods
	QProxyStyle (const QString &key)

	QProxyStyle (QStyle *style=nullptr)

	~QProxyStyle ()

QStyle *	baseStyle () const

void	drawComplexControl (ComplexControl control, const QStyleOptionComplex option, QPainter painter, const QWidget *widget=nullptr) const override

void	drawControl (ControlElement element, const QStyleOption option, QPainter painter, const QWidget *widget=nullptr) const override

void	drawItemPixmap (QPainter *painter, const QRect &rect, int alignment, const QPixmap &pixmap) const override

void	drawItemText (QPainter *painter, const QRect &rect, int flags, const QPalette &pal, bool enabled, const QString &text, QPalette::ColorRole textRole=QPalette::NoRole) const override

void	drawPrimitive (PrimitiveElement element, const QStyleOption option, QPainter painter, const QWidget *widget=nullptr) const override

QPixmap	generatedIconPixmap (QIcon::Mode iconMode, const QPixmap &pixmap, const QStyleOption *option) const override

SubControl	hitTestComplexControl (ComplexControl control, const QStyleOptionComplex option, const QPoint &pos, const QWidget widget=nullptr) const override

QRect	itemPixmapRect (const QRect &r, int flags, const QPixmap &pixmap) const override

QRect	itemTextRect (const QFontMetrics &fm, const QRect &r, int flags, bool enabled, const QString &text) const override

int	layoutSpacing (QSizePolicy::ControlType control1, QSizePolicy::ControlType control2, Qt::Orientation orientation, const QStyleOption option=nullptr, const QWidget widget=nullptr) const override

int	pixelMetric (PixelMetric metric, const QStyleOption option=nullptr, const QWidget widget=nullptr) const override

void	polish (QApplication *app) override

void	polish (QPalette &pal) override

void	polish (QWidget *widget) override

void	setBaseStyle (QStyle *style)

QSize	sizeFromContents (ContentsType type, const QStyleOption option, const QSize &size, const QWidget widget) const override

QIcon	standardIcon (StandardPixmap standardIcon, const QStyleOption option=nullptr, const QWidget widget=nullptr) const override

QPalette	standardPalette () const override

QPixmap	standardPixmap (StandardPixmap standardPixmap, const QStyleOption option, const QWidget widget=nullptr) const override

int	styleHint (StyleHint hint, const QStyleOption option=nullptr, const QWidget widget=nullptr, QStyleHintReturn *styleHintReturn=nullptr) const override

QRect	subControlRect (ComplexControl control, const QStyleOptionComplex option, SubControl sc, const QWidget widget) const override

QRect	subElementRect (SubElement element, const QStyleOption option, const QWidget widget) const override

void	unpolish (QApplication *app) override

void	unpolish (QWidget *widget) override

Public Methods inherited from QCommonStyle
	QCommonStyle ()

	~QCommonStyle ()

Public Methods inherited from QStyle
	QStyle ()

virtual	~QStyle ()

int	combinedLayoutSpacing (QSizePolicy::ControlTypes controls1, QSizePolicy::ControlTypes controls2, Qt::Orientation orientation, QStyleOption option=nullptr, QWidget widget=nullptr) const

const QStyle *	proxy () const

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Protected Methods
bool	event (QEvent *event) override

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Additional Inherited Members
Public Typedefs inherited from QStyle
using	State = QFlags< StateFlag >

using	SubControls = QFlags< SubControl >

Public Types inherited from QStyle
enum	ComplexControl

enum	ContentsType

enum	ControlElement

enum	PixelMetric

enum	PrimitiveElement

enum	RequestSoftwareInputPanel

enum	StandardPixmap

enum	StateFlag

enum	StyleHint

enum	SubControl

enum	SubElement

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Slots inherited from QObject
void	deleteLater ()

Static Public Methods inherited from QStyle
static QRect	alignedRect (Qt::LayoutDirection direction, Qt::Alignment alignment, const QSize &size, const QRect &rect)

static int	sliderPositionFromValue (int min, int max, int logicalValue, int span, bool upsideDown=false)

static int	sliderValueFromPosition (int min, int max, int position, int span, bool upsideDown=false)

static Qt::Alignment	visualAlignment (Qt::LayoutDirection direction, Qt::Alignment alignment)

static QPoint	visualPos (Qt::LayoutDirection direction, const QRect &boundingRect, const QPoint &logicalPosition)

static QRect	visualRect (Qt::LayoutDirection direction, const QRect &boundingRect, const QRect &logicalRect)

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Properties inherited from QObject
	objectName

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

Detailed Description

The QProxyStyle class is used to simplify dynamically overriding QStyle elements. This class wraps a QStyle (usually the default system style) for the purpose of dynamically overriding painting or other specific style behavior.

The following example shows how to override the shortcut underline behavior on any platform.

class MyProxyStyle : public QProxyStyle
{
  public:
    int styleHint(StyleHint hint, const QStyleOption *option = nullptr,
          const QWidget *widget = nullptr, QStyleHintReturn *styleHintReturn = nullptr) const
    {
        if (hint == QStyle::SH_UnderlineShortcut) {
           return 0;
        }
 
        return QProxyStyle::styleHint(hint, option, widget, styleHintReturn);
    }
};
 
int main(int argc, char **argv)
{
    Q_INIT_RESOURCE(textedit);
 
    QApplication a(argc, argv);
    a.setStyle(new MyProxyStyle);
 
    TextEdit mw;
    mw.resize(700, 800);
    mw.show();
}

See also: QStyle

Constructor & Destructor Documentation

QProxyStyle::QProxyStyle ( QStyle * style = nullptr )

Constructs a new QProxyStyle object for using the given style. If style is a nullptr the current application style is used. Ownership of style is transferred to QProxyStyle.

QProxyStyle::QProxyStyle ( const QString & key )

Constructs a new QProxyStyle object using the style for the given key.

See also: QStyleFactory::create()

QProxyStyle::~QProxyStyle ( )

Destroys the QProxyStyle object.

Method Documentation

QStyle * QProxyStyle::baseStyle ( ) const

Returns the proxy base style object. If no base style is set on the proxy style, QProxyStyle will create an instance of the application style instead.

See also: setBaseStyle(), QStyle

void QProxyStyle::drawComplexControl	(	ComplexControl	control,
		const QStyleOptionComplex *	option,
		QPainter *	painter,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Reimplemented from QCommonStyle::drawComplexControl()

void QProxyStyle::drawControl	(	ControlElement	element,
		const QStyleOption *	option,
		QPainter *	painter,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Reimplemented from QCommonStyle::drawControl()

void QProxyStyle::drawItemPixmap	(	QPainter *	painter,
		const QRect &	rect,
		int	alignment,
		const QPixmap &	pixmap
	)		const

overridevirtual

Reimplemented from QStyle::drawItemPixmap()

void QProxyStyle::drawItemText	(	QPainter *	painter,
		const QRect &	rect,
		int	flags,
		const QPalette &	pal,
		bool	enabled,
		const QString &	text,
		QPalette::ColorRole	textRole = `QPalette::NoRole`
	)		const

overridevirtual

Reimplemented from QStyle::drawItemText()

void QProxyStyle::drawPrimitive	(	PrimitiveElement	element,
		const QStyleOption *	option,
		QPainter *	painter,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Reimplemented from QCommonStyle::drawPrimitive()

bool QProxyStyle::event ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QObject::event()

QPixmap QProxyStyle::generatedIconPixmap	(	QIcon::Mode	iconMode,
		const QPixmap &	pixmap,
		const QStyleOption *	option
	)		const

overridevirtual

Reimplemented from QCommonStyle::generatedIconPixmap()

SubControl QProxyStyle::hitTestComplexControl	(	ComplexControl	control,
		const QStyleOptionComplex *	option,
		const QPoint &	pos,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Reimplemented from QCommonStyle::hitTestComplexControl()

QRect QProxyStyle::itemPixmapRect	(	const QRect &	r,
		int	flags,
		const QPixmap &	pixmap
	)		const

overridevirtual

Reimplemented from QStyle::itemPixmapRect()

QRect QProxyStyle::itemTextRect	(	const QFontMetrics &	fm,
		const QRect &	r,
		int	flags,
		bool	enabled,
		const QString &	text
	)		const

overridevirtual

Reimplemented from QStyle::itemTextRect()

int QProxyStyle::layoutSpacing	(	QSizePolicy::ControlType	control1,
		QSizePolicy::ControlType	control2,
		Qt::Orientation	orientation,
		const QStyleOption *	option = `nullptr`,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

This slot is called by layoutSpacing() to determine the spacing that should be used between control1 and control2 in a layout. The orientation specifies whether the controls are laid out side by side or stacked vertically. The option parameter can be used to pass extra information about the parent widget. The widget parameter is optional and can also be used if option is 0.

The default implementation returns -1.

See also: combinedLayoutSpacing()

Reimplemented from QCommonStyle::layoutSpacing()

int QProxyStyle::pixelMetric	(	PixelMetric	metric,
		const QStyleOption *	option = `nullptr`,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Reimplemented from QCommonStyle::pixelMetric()

void QProxyStyle::polish ( QApplication * app )

overridevirtual

Reimplemented from QCommonStyle::polish()

void QProxyStyle::polish ( QPalette & pal )

overridevirtual

Reimplemented from QCommonStyle::polish()

void QProxyStyle::polish ( QWidget * widget )

overridevirtual

Reimplemented from QCommonStyle::polish()

void QProxyStyle::setBaseStyle ( QStyle * style )

Sets the base style which should be proxied. Ownership of style is transferred to QProxyStyle. If style is zero, a desktop-dependent style will be assigned automatically.

See also: baseStyle()

QSize QProxyStyle::sizeFromContents	(	ContentsType	type,
		const QStyleOption *	option,
		const QSize &	size,
		const QWidget *	widget
	)		const

overridevirtual

Reimplemented from QCommonStyle::sizeFromContents()

QIcon QProxyStyle::standardIcon	(	StandardPixmap	standardIcon,
		const QStyleOption *	option = `nullptr`,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Returns an icon for the given standardIcon.

Reimplement this method to provide your own icons in a QStyle subclass. The option argument can be used to pass extra information required to find the appropriate icon. The widget argument is optional and can also be used to help find the icon.

Reimplemented from QCommonStyle::standardIcon()

QPalette QProxyStyle::standardPalette ( ) const

overridevirtual

Reimplemented from QStyle::standardPalette()

QPixmap QProxyStyle::standardPixmap	(	StandardPixmap	standardPixmap,
		const QStyleOption *	option,
		const QWidget *	widget = `nullptr`
	)		const

overridevirtual

Reimplemented from QCommonStyle::standardPixmap()

int QProxyStyle::styleHint	(	StyleHint	hint,
		const QStyleOption *	option = `nullptr`,
		const QWidget *	widget = `nullptr`,
		QStyleHintReturn *	styleHintReturn = `nullptr`
	)		const