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Qt 6.x
The Qt SDK
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Qt 6.x
The Qt SDK
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The QPixmapBlurFilter class provides blur filtering for pixmaps. More...
#include <qpixmapfilter_p.h>
Inheritance diagram for QPixmapBlurFilter: Collaboration diagram for QPixmapBlurFilter:Public Member Functions | |
| QPixmapBlurFilter (QObject *parent=nullptr) | |
| Constructs a pixmap blur filter. | |
| ~QPixmapBlurFilter () | |
| Destructor of pixmap blur filter. | |
| void | setRadius (qreal radius) |
| Sets the radius of the blur filter. | |
| void | setBlurHints (QGraphicsBlurEffect::BlurHints hints) |
| Setting the blur hints to PerformanceHint causes the implementation to trade off visual quality to blur the image faster. | |
| qreal | radius () const |
| Gets the radius of the blur filter. | |
| QGraphicsBlurEffect::BlurHints | blurHints () const |
| Gets the blur hints of the blur filter. | |
| QRectF | boundingRectFor (const QRectF &rect) const override |
| void | draw (QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect=QRectF()) const override |
| Public Member Functions inherited from QPixmapFilter | |
| virtual | ~QPixmapFilter ()=0 |
| Destroys the pixmap filter. | |
| FilterType | type () const |
| Returns the type of the filter. | |
| virtual QRectF | boundingRectFor (const QRectF &rect) const |
| Returns the bounding rectangle that is affected by the pixmap filter if the filter is applied to the specified rect. | |
| virtual void | draw (QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF &srcRect=QRectF()) const =0 |
| Uses painter to draw filtered result of src at the point specified by p. | |
| Public Member Functions inherited from QObject | |
| Q_INVOKABLE | QObject (QObject *parent=nullptr) |
| Constructs an object with parent object parent. | |
| virtual | ~QObject () |
| Destroys the object, deleting all its child objects. | |
| virtual bool | event (QEvent *event) |
| This virtual function receives events to an object and should return true if the event e was recognized and processed. | |
| virtual bool | eventFilter (QObject *watched, QEvent *event) |
| Filters events if this object has been installed as an event filter for the watched object. | |
| QString | objectName () const |
| Q_WEAK_OVERLOAD void | setObjectName (const QString &name) |
| Sets the object's name to name. | |
| void | setObjectName (QAnyStringView name) |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
| QBindable< QString > | bindableObjectName () |
| bool | isWidgetType () const |
Returns true if the object is a widget; otherwise returns false. | |
| bool | isWindowType () const |
Returns true if the object is a window; otherwise returns false. | |
| bool | isQuickItemType () const |
Returns true if the object is a QQuickItem; otherwise returns false. | |
| bool | signalsBlocked () const noexcept |
Returns true if signals are blocked; otherwise returns false. | |
| bool | blockSignals (bool b) noexcept |
| If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). | |
| QThread * | thread () const |
| Returns the thread in which the object lives. | |
| void | moveToThread (QThread *thread) |
| Changes the thread affinity for this object and its children. | |
| int | startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer) |
| This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds. | |
| int | startTimer (std::chrono::milliseconds time, Qt::TimerType timerType=Qt::CoarseTimer) |
| void | killTimer (int id) |
| Kills the timer with timer identifier, id. | |
| template<typename T > | |
| T | findChild (const QString &aName=QString(), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
| Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object. | |
| template<typename T > | |
| QList< T > | findChildren (const QString &aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
| Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. | |
| template<typename T > | |
| QList< T > | findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
| const QObjectList & | children () const |
| Returns a list of child objects. | |
| void | setParent (QObject *parent) |
| Makes the object a child of parent. | |
| void | installEventFilter (QObject *filterObj) |
| Installs an event filter filterObj on this object. | |
| void | removeEventFilter (QObject *obj) |
| Removes an event filter object obj from this object. | |
| 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 |
| Dumps a tree of children to the debug output. | |
| void | dumpObjectInfo () const |
| Dumps information about signal connections, etc. | |
| bool | setProperty (const char *name, const QVariant &value) |
| Sets the value of the object's name property to value. | |
| bool | setProperty (const char *name, QVariant &&value) |
| QVariant | property (const char *name) const |
| Returns the value of the object's name property. | |
| QList< QByteArray > | dynamicPropertyNames () const |
| QBindingStorage * | bindingStorage () |
| const QBindingStorage * | bindingStorage () const |
| QObject * | parent () const |
| Returns a pointer to the parent object. | |
| bool | inherits (const char *classname) const |
Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. | |
Additional Inherited Members | |
| Public Types inherited from QPixmapFilter | |
| enum | FilterType { ConvolutionFilter , ColorizeFilter , DropShadowFilter , BlurFilter , UserFilter = 1024 } |
| Public Slots inherited from QObject | |
| void | deleteLater () |
| \threadsafe | |
| Signals inherited from QObject | |
| void | destroyed (QObject *=nullptr) |
| This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked. | |
| void | objectNameChanged (const QString &objectName, QPrivateSignal) |
| This signal is emitted after the object's name has been changed. | |
| 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) |
| \threadsafe | |
| 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::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection) |
| template<typename Func1 , typename Func2 > | |
| static QMetaObject::Connection | connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot) |
| static bool | disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member) |
| \threadsafe | |
| static bool | disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member) |
| static bool | disconnect (const QMetaObject::Connection &) |
| Disconnect a 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 Member Functions inherited from QPixmapFilter | |
| QPixmapFilter (QPixmapFilterPrivate &d, FilterType type, QObject *parent) | |
| QPixmapFilter (FilterType type, QObject *parent) | |
| Constructs a default QPixmapFilter with the given type. | |
| Protected Member Functions inherited from QObject | |
| QObject * | sender () const |
| Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr. | |
| int | senderSignalIndex () const |
| int | receivers (const char *signal) const |
| Returns the number of receivers connected to the signal. | |
| bool | isSignalConnected (const QMetaMethod &signal) const |
| virtual void | timerEvent (QTimerEvent *event) |
| This event handler can be reimplemented in a subclass to receive timer events for the object. | |
| virtual void | childEvent (QChildEvent *event) |
| This event handler can be reimplemented in a subclass to receive child events. | |
| virtual void | customEvent (QEvent *event) |
| This event handler can be reimplemented in a subclass to receive custom events. | |
| virtual void | connectNotify (const QMetaMethod &signal) |
| virtual void | disconnectNotify (const QMetaMethod &signal) |
| QObject (QObjectPrivate &dd, QObject *parent=nullptr) | |
| Protected Attributes inherited from QObject | |
| QScopedPointer< QObjectData > | d_ptr |
| Properties inherited from QObject | |
| QString | objectName |
| the name of this object | |
| Related Symbols inherited from QObject | |
| template< class T > T | qobject_cast (const QObject *object) |
| Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr. | |
| template< typename T > T | qFindChildqFindChildren (const QObject *obj, const QString &name)() |
| template< typename T > QList< T > | qFindChildrenqFindChildren (const QObject *obj, const QString &name)() |
| QObjectList | |
| \macro Q_CLASSINFO(Name, Value) | |
The QPixmapBlurFilter class provides blur filtering for pixmaps.
QPixmapBlurFilter implements a blur pixmap filter, which is applied when \l{QPixmapFilter::}{draw()} is called.
The filter lets you specialize the radius of the blur as well as hints as to whether to prefer performance or quality.
By default, the blur effect is produced by applying an exponential filter generated from the specified blurRadius(). Paint engines may override this with a custom blur that is faster on the underlying hardware.
Definition at line 84 of file qpixmapfilter_p.h.
Constructs a pixmap blur filter.
Definition at line 478 of file qpixmapfilter.cpp.
| QPixmapBlurFilter::~QPixmapBlurFilter | ( | ) |
Destructor of pixmap blur filter.
Definition at line 488 of file qpixmapfilter.cpp.
| QGraphicsBlurEffect::BlurHints QPixmapBlurFilter::blurHints | ( | ) | const |
Gets the blur hints of the blur filter.
Definition at line 540 of file qpixmapfilter.cpp.
References d.
Reimplemented from QPixmapFilter.
Definition at line 551 of file qpixmapfilter.cpp.
References d, radiusScale, and rect.
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overridevirtual |
Implements QPixmapFilter.
Definition at line 869 of file qpixmapfilter.cpp.
References QImage::copy(), d, QPainter::drawPixmap(), QRect::intersected(), QPainter::isActive(), QRectF::isNull(), painter, qt_blurImage(), qt_scaleForTransform(), QGraphicsBlurEffect::QualityHint, radiusScale, rect, QPainter::setWorldTransform(), QRectF::toAlignedRect(), QPainter::transform(), QPainter::translate(), QRectF::translated(), and QPainter::worldTransform().
Here is the call graph for this function:| qreal QPixmapBlurFilter::radius | ( | ) | const |
Gets the radius of the blur filter.
Definition at line 508 of file qpixmapfilter.cpp.
References d.
Referenced by setRadius().
Here is the caller graph for this function:| void QPixmapBlurFilter::setBlurHints | ( | QGraphicsBlurEffect::BlurHints | hints | ) |
Setting the blur hints to PerformanceHint causes the implementation to trade off visual quality to blur the image faster.
Setting the blur hints to QualityHint causes the implementation to improve visual quality at the expense of speed.
AnimationHint causes the implementation to optimize for animating the blur radius, possibly by caching blurred versions of the source pixmap.
The implementation is free to ignore this value if it only has a single blur algorithm.
Definition at line 529 of file qpixmapfilter.cpp.
References d.
Sets the radius of the blur filter.
Higher radius produces increased blurriness.
Definition at line 497 of file qpixmapfilter.cpp.
Here is the call graph for this function:
1.9.7