QQnxWindowGrabber Class Reference

#include <qqnxwindowgrabber_p.h>

Inheritance diagram for QQnxWindowGrabber:

Collaboration diagram for QQnxWindowGrabber:

Classes
struct	BufferView

Signals
void	updateScene (const QSize &size)
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.

Public Member Functions
	QQnxWindowGrabber (QObject *parent=0)
	~QQnxWindowGrabber ()
void	setFrameRate (int frameRate)
void	setWindowId (const QByteArray &windowId)
void	setRhi (QRhi *rhi)
void	start ()
void	stop ()
void	pause ()
void	resume ()
void	forceUpdate ()
bool	nativeEventFilter (const QByteArray &eventType, void *message, qintptr *result) override
	This method is called for every native event.
bool	handleScreenEvent (screen_event_t event)
QByteArray	windowGroupId () const
bool	isEglImageSupported () const
int	getNextTextureId ()
BufferView	getNextBuffer ()
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.
Public Member Functions inherited from QAbstractNativeEventFilter
	QAbstractNativeEventFilter ()
	Creates a native event filter.
virtual	~QAbstractNativeEventFilter ()
	Destroys the native event filter.
virtual bool	nativeEventFilter (const QByteArray &eventType, void *message, qintptr *result)=0
	This method is called for every native event.

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe
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 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)

Detailed Description

Definition at line 37 of file qqnxwindowgrabber_p.h.

Constructor & Destructor Documentation

QQnxWindowGrabber()

QQnxWindowGrabber::QQnxWindowGrabber ( QObject *  parent = 0 )

explicit

Definition at line 52 of file qqnxwindowgrabber.cpp.

References QObject::connect(), QCoreApplication::eventDispatcher(), QAbstractEventDispatcher::installNativeEventFilter(), QPlatformNativeInterface::nativeResourceForIntegration(), QGuiApplication::platformNativeInterface(), qgetenv(), s_eglCreateImageKHR, s_eglDestroyImageKHR, QTimer::setInterval(), QTimer::timeout(), and toInt().

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~QQnxWindowGrabber()

QQnxWindowGrabber::~QQnxWindowGrabber

(

)

Definition at line 93 of file qqnxwindowgrabber.cpp.

References QCoreApplication::eventDispatcher(), and QAbstractEventDispatcher::removeNativeEventFilter().

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Member Function Documentation

forceUpdate()

void QQnxWindowGrabber::forceUpdate

(

)

Definition at line 161 of file qqnxwindowgrabber.cpp.

getNextBuffer()

QQnxWindowGrabber::BufferView QQnxWindowGrabber::getNextBuffer

(

)

Definition at line 301 of file qqnxwindowgrabber.cpp.

Referenced by QnxRasterBuffer::map().

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getNextTextureId()

int QQnxWindowGrabber::getNextTextureId

(

)

Definition at line 293 of file qqnxwindowgrabber.cpp.

Referenced by QnxTextureBuffer::textureHandle().

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handleScreenEvent()

bool QQnxWindowGrabber::handleScreenEvent

(

screen_event_t

event

)

Definition at line 169 of file qqnxwindowgrabber.cpp.

References qWarning, start(), and window().

Referenced by nativeEventFilter().

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isEglImageSupported()

bool QQnxWindowGrabber::isEglImageSupported

(

)

const

Definition at line 226 of file qqnxwindowgrabber.cpp.

nativeEventFilter()

bool QQnxWindowGrabber::nativeEventFilter ( const QByteArray &  eventType, void *  message, qintptr *  result  )

overridevirtual

This method is called for every native event.

Note

The filter function here receives native messages, for example, MSG or XCB event structs.

It is called by the QPA platform plugin. On Windows, it is called by the event dispatcher.

The type of event eventType is specific to the platform plugin chosen at run-time, and can be used to cast message to the right type.

On X11, eventType is set to "xcb_generic_event_t", and the message can be casted to a xcb_generic_event_t pointer.

On Windows, eventType is set to "windows_generic_MSG" for messages sent to toplevel windows, and "windows_dispatcher_MSG" for system-wide messages such as messages from a registered hot key. In both cases, the message can be casted to a MSG pointer. The result pointer is only used on Windows, and corresponds to the LRESULT pointer.

On macOS, eventType is set to "mac_generic_NSEvent", and the message can be casted to an NSEvent pointer.

In your reimplementation of this function, if you want to filter the message out, i.e. stop it being handled further, return true; otherwise return false.

{Linux example}

class MyXcbEventFilter : public QAbstractNativeEventFilter
{
public:
    bool nativeEventFilter(const QByteArray &eventType, void *message, qintptr *) override
    {
        if (eventType == "xcb_generic_event_t") {
            xcb_generic_event_t* ev = static_cast<xcb_generic_event_t *>(message);
            // ...
        }
        return false;
    }
};

{Windows example}

class MyMSGEventFilter : public QAbstractNativeEventFilter
{
public:
    bool nativeEventFilter(const QByteArray &eventType, void *message, qintptr *) override
    {
        if (eventType == "windows_generic_MSG") {
            MSG *msg = static_cast<MSG *>(message);
            // ...
        } else if (eventType == "windows_dispatcher_MSG") {
            MSG *msg = static_cast<MSG *>(message);
            // ...
        }
        return false;
    }
};

{macOS example}

mycocoaeventfilter.h:

#include <QAbstractNativeEventFilter>
 
class MyCocoaEventFilter : public QAbstractNativeEventFilter
{
public:
    bool nativeEventFilter(const QByteArray &eventType, void *message, qintptr *) override;
};

mycocoaeventfilter.mm:

#include "mycocoaeventfilter.h"
 
#import <AppKit/AppKit.h>
 
bool MyCocoaEventFilter::nativeEventFilter(const QByteArray &eventType, void *message, qintptr *)
{
    if (eventType == "mac_generic_NSEvent") {
        NSEvent *event = static_cast<NSEvent *>(message);
        if ([event type] == NSKeyDown) {
            // Handle key event
            qDebug() << QString::fromNSString([event characters]);
        }
    }
    return false;
}

myapp.pro:

HEADERS += mycocoaeventfilter.h
OBJECTIVE_SOURCES += mycocoaeventfilter.mm
LIBS += -framework AppKit

Implements QAbstractNativeEventFilter.

Definition at line 205 of file qqnxwindowgrabber.cpp.

References handleScreenEvent().

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pause()

void QQnxWindowGrabber::pause

(

)

Definition at line 148 of file qqnxwindowgrabber.cpp.

References QTimer::stop().

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resume()

void QQnxWindowGrabber::resume

(

)

Definition at line 153 of file qqnxwindowgrabber.cpp.

References QTimer::start().

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setFrameRate()

void QQnxWindowGrabber::setFrameRate

(

int

frameRate

)

Definition at line 99 of file qqnxwindowgrabber.cpp.

References frameRate, and QTimer::setInterval().

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setRhi()

void QQnxWindowGrabber::setRhi

(

QRhi *

rhi

)

Definition at line 109 of file qqnxwindowgrabber.cpp.

setWindowId()

void QQnxWindowGrabber::setWindowId

(

const QByteArray &

windowId

)

Definition at line 104 of file qqnxwindowgrabber.cpp.

start()

void QQnxWindowGrabber::start

(

)

Definition at line 116 of file qqnxwindowgrabber.cpp.

References QTimer::start().

Referenced by handleScreenEvent().

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stop()

void QQnxWindowGrabber::stop

(

)

Definition at line 136 of file qqnxwindowgrabber.cpp.

References QTimer::stop().

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updateScene

void QQnxWindowGrabber::updateScene ( const QSize &  size )

signal

Referenced by QQnxMediaPlayer::QQnxMediaPlayer().

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windowGroupId()

QByteArray QQnxWindowGrabber::windowGroupId

(

)

const

Definition at line 215 of file qqnxwindowgrabber.cpp.

---

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

• qtmultimedia/src/plugins/multimedia/qnx/common/qqnxwindowgrabber_p.h
• qtmultimedia/src/plugins/multimedia/qnx/common/qqnxwindowgrabber.cpp