The QGraphicsDropShadowEffect class provides a drop shadow effect. More...

#include <qgraphicseffect.h>

Inheritance diagram for QGraphicsDropShadowEffect:

Collaboration diagram for QGraphicsDropShadowEffect:

Public Slots
void	setOffset (const QPointF &ofs)

void	setOffset (qreal dx, qreal dy)

void	setOffset (qreal d)

void	setXOffset (qreal dx)

void	setYOffset (qreal dy)

void	setBlurRadius (qreal blurRadius)

void	setColor (const QColor &color)

Public Slots inherited from QGraphicsEffect
void	setEnabled (bool enable)

void	update ()

Public Slots inherited from QObject
void	deleteLater ()

Signals
void	offsetChanged (const QPointF &offset)

void	blurRadiusChanged (qreal blurRadius)

void	colorChanged (const QColor &color)

Signals inherited from QGraphicsEffect
void	enabledChanged (bool enabled)

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

void	objectNameChanged (const QString &objectName, QPrivateSignal)

Public Member Functions
	QGraphicsDropShadowEffect (QObject *parent=nullptr)

	~QGraphicsDropShadowEffect ()

QRectF	boundingRectFor (const QRectF &rect) const override

QPointF	offset () const

qreal	xOffset () const

qreal	yOffset () const

qreal	blurRadius () const

QColor	color () const

Public Member Functions inherited from QGraphicsEffect
	QGraphicsEffect (QObject *parent=nullptr)

virtual	~QGraphicsEffect ()

QRectF	boundingRect () const

bool	isEnabled () const

QGraphicsEffectSource *	source () const

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)

virtual	~QObject ()

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

QString	objectName () const

void	setObjectName (const QString &name)

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const

bool	isWindowType () const

bool	signalsBlocked () const noexcept

bool	blockSignals (bool b) noexcept

QThread *	thread () const

void	moveToThread (QThread *thread)

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

void	killTimer (int id)

template<typename T >
T	findChild (const QString &aName=QString(), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

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

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

const QObjectList &	children () const

void	setParent (QObject *parent)

void	installEventFilter (QObject *filterObj)

void	removeEventFilter (QObject *obj)

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=nullptr, const QObject receiver=nullptr, const char *member=nullptr) const

bool	disconnect (const QObject receiver, const char member=nullptr) const

void	dumpObjectTree () const

void	dumpObjectInfo () const

bool	setProperty (const char *name, const QVariant &value)

QVariant	property (const char *name) const

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const

bool	inherits (const char *classname) const

Protected Member Functions
void	draw (QPainter *painter) override

Protected Member Functions inherited from QGraphicsEffect
	QGraphicsEffect (QGraphicsEffectPrivate &d, QObject *parent=nullptr)

virtual void	sourceChanged (ChangeFlags flags)

void	updateBoundingRect ()

bool	sourceIsPixmap () const

QRectF	sourceBoundingRect (Qt::CoordinateSystem system=Qt::LogicalCoordinates) const

void	drawSource (QPainter *painter)

QPixmap	sourcePixmap (Qt::CoordinateSystem system=Qt::LogicalCoordinates, QPoint *offset=nullptr, PixmapPadMode mode=PadToEffectiveBoundingRect) const

Protected Member Functions inherited from QObject
QObject *	sender () const

int	senderSignalIndex () const

int	receivers (const char *signal) const

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	timerEvent (QTimerEvent *event)

virtual void	childEvent (QChildEvent *event)

virtual void	customEvent (QEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

	QObject (QObjectPrivate &dd, QObject *parent=nullptr)

Properties
QPointF	offset
	the shadow offset in pixels. More...

qreal	xOffset
	the horizontal shadow offset in pixels. More...

qreal	yOffset
	the vertical shadow offset in pixels. More...

qreal	blurRadius
	the blur radius in pixels of the drop shadow. More...

QColor	color
	the color of the drop shadow. More...

Properties inherited from QGraphicsEffect
bool	enabled
	whether the effect is enabled or not. More...

Properties inherited from QObject
QString	objectName
	the name of this object More...

Additional Inherited Members
Public Types inherited from QGraphicsEffect
enum	ChangeFlag { SourceAttached = 0x1 , SourceDetached = 0x2 , SourceBoundingRectChanged = 0x4 , SourceInvalidated = 0x8 }

enum	PixmapPadMode { NoPad , PadToTransparentBorder , PadToEffectiveBoundingRect }

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)

static QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

static QMetaObject::Connection ::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 slot)

static QMetaObject::Connection ::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject context, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static std::enable_if< QtPrivate::FunctionPointer< Func2 >::ArgumentCount==-1 &&!std::is_convertible_v< Func2, const char * >, QMetaObject::Connection >::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 slot)

template<typename Func1 , typename Func2 >
static std::enable_if< QtPrivate::FunctionPointer< Func2 >::ArgumentCount==-1 &&!std::is_convertible_v< Func2, const char * >, QMetaObject::Connection >::type	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject context, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static bool	disconnect (const QMetaObject::Connection &)

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Related Functions inherited from QObject
template< class T > T	qobject_cast (const QObject *object)

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

	QObjectList

Detailed Description

The QGraphicsDropShadowEffect class provides a drop shadow effect.

Since: 4.6 \inmodule QtWidgets

A drop shadow effect renders the source with a drop shadow. The color of the drop shadow can be modified using the setColor() function. The drop shadow offset can be modified using the setOffset() function and the blur radius of the drop shadow can be changed with the setBlurRadius() function.

By default, the drop shadow is a semi-transparent dark gray (QColor(63, 63, 63, 180)) shadow, blurred with a radius of 1 at an offset of 8 pixels towards the lower right. The drop shadow offset is specified in device coordinates.

See also: QGraphicsBlurEffect, QGraphicsColorizeEffect, QGraphicsOpacityEffect

Definition at line 196 of file qgraphicseffect.h.

Constructor & Destructor Documentation

◆ QGraphicsDropShadowEffect()

QGraphicsDropShadowEffect::QGraphicsDropShadowEffect ( QObject * parent = nullptr )

Constructs a new QGraphicsDropShadowEffect instance. The parent parameter is passed to QGraphicsEffect's constructor.

Definition at line 903 of file qgraphicseffect.cpp.

◆ ~QGraphicsDropShadowEffect()

QGraphicsDropShadowEffect::~QGraphicsDropShadowEffect ( )

Destroys the effect.

Definition at line 911 of file qgraphicseffect.cpp.

Member Function Documentation

◆ blurRadius()

qreal QGraphicsDropShadowEffect::blurRadius ( ) const

Definition at line 981 of file qgraphicseffect.cpp.

◆ blurRadiusChanged

void QGraphicsDropShadowEffect::blurRadiusChanged ( qreal blurRadius )

signal

This signal is emitted whenever the effect's blur radius changes. The blurRadius parameter holds the effect's new blur radius.

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◆ boundingRectFor()

QRectF QGraphicsDropShadowEffect::boundingRectFor ( const QRectF & rect ) const

overridevirtual

\reimp

Reimplemented from QGraphicsEffect.

Definition at line 1041 of file qgraphicseffect.cpp.

◆ color()

QColor QGraphicsDropShadowEffect::color ( ) const

Definition at line 1014 of file qgraphicseffect.cpp.

◆ colorChanged

void QGraphicsDropShadowEffect::colorChanged ( const QColor & color )

signal

This signal is emitted whenever the effect's color changes. The color parameter holds the effect's new color.

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◆ draw()

void QGraphicsDropShadowEffect::draw ( QPainter * painter )

overrideprotectedvirtual

\reimp

Implements QGraphicsEffect.

Definition at line 1050 of file qgraphicseffect.cpp.

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◆ offset()

QPointF QGraphicsDropShadowEffect::offset ( ) const

Definition at line 926 of file qgraphicseffect.cpp.

◆ offsetChanged

void QGraphicsDropShadowEffect::offsetChanged ( const QPointF & offset )

signal

This signal is emitted whenever the effect's shadow offset changes. The offset parameter holds the effect's new shadow offset.

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◆ setBlurRadius

void QGraphicsDropShadowEffect::setBlurRadius ( qreal blurRadius )

slot

Definition at line 987 of file qgraphicseffect.cpp.

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◆ setColor

void QGraphicsDropShadowEffect::setColor ( const QColor & color )

slot

Definition at line 1020 of file qgraphicseffect.cpp.

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◆ setOffset [1/3]

void QGraphicsDropShadowEffect::setOffset ( const QPointF & ofs )

slot

Definition at line 932 of file qgraphicseffect.cpp.

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◆ setOffset [2/3]

void QGraphicsDropShadowEffect::setOffset ( qreal d )

inlineslot

Definition at line 226 of file qgraphicseffect.h.

◆ setOffset [3/3]

void QGraphicsDropShadowEffect::setOffset	(	qreal	dx,
		qreal	dy
	)

inlineslot

Definition at line 223 of file qgraphicseffect.h.

◆ setXOffset

void QGraphicsDropShadowEffect::setXOffset ( qreal dx )

inlineslot

Definition at line 229 of file qgraphicseffect.h.

◆ setYOffset

void QGraphicsDropShadowEffect::setYOffset ( qreal dy )

inlineslot

Definition at line 232 of file qgraphicseffect.h.

◆ xOffset()

qreal QGraphicsDropShadowEffect::xOffset ( ) const

inline

Definition at line 211 of file qgraphicseffect.h.

◆ yOffset()

qreal QGraphicsDropShadowEffect::yOffset ( ) const

inline

Definition at line 214 of file qgraphicseffect.h.

Property Documentation

◆ blurRadius

QGraphicsDropShadowEffect::blurRadius

readwrite

the blur radius in pixels of the drop shadow.

Using a smaller radius results in a sharper shadow, whereas using a bigger radius results in a more blurred shadow.

By default, the blur radius is 1 pixel.

See also: color(), offset()

Definition at line 186 of file qgraphicseffect.h.

◆ color

QGraphicsDropShadowEffect::color

readwrite

the color of the drop shadow.

By default, the drop color is a semi-transparent dark gray (QColor(63, 63, 63, 180)).

See also: offset(), blurRadius()

Definition at line 186 of file qgraphicseffect.h.

◆ offset

QGraphicsDropShadowEffect::offset

readwrite

the shadow offset in pixels.

By default, the offset is 8 pixels towards the lower right.

The offset is given in device coordinates, which means it is unaffected by scale.

See also: xOffset(), yOffset(), blurRadius(), color()

Definition at line 186 of file qgraphicseffect.h.

◆ xOffset

QGraphicsDropShadowEffect::xOffset

readwrite

the horizontal shadow offset in pixels.

By default, the horizontal shadow offset is 8 pixels.

See also: yOffset(), offset()

Definition at line 186 of file qgraphicseffect.h.

◆ yOffset

QGraphicsDropShadowEffect::yOffset

readwrite

the vertical shadow offset in pixels.

By default, the vertical shadow offset is 8 pixels.

See also: xOffset(), offset()

Definition at line 186 of file qgraphicseffect.h.

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

src/widgets/effects/qgraphicseffect.h
src/widgets/effects/qgraphicseffect.cpp

Public Slots

Signals

Public Member Functions

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QGraphicsDropShadowEffect()

◆ ~QGraphicsDropShadowEffect()

Member Function Documentation

◆ blurRadius()

◆ blurRadiusChanged

◆ boundingRectFor()

◆ color()

◆ colorChanged

◆ draw()

◆ offset()

◆ offsetChanged

◆ setBlurRadius

◆ setColor

◆ setOffset [1/3]

◆ setOffset [2/3]

◆ setOffset [3/3]

◆ setXOffset

◆ setYOffset

◆ xOffset()

◆ yOffset()

Property Documentation

◆ blurRadius

◆ color

◆ offset

◆ xOffset

◆ yOffset