#include <qlinuxinput.h>

Inheritance diagram for QLinuxInputMouseHandler:

Public Functions
	QLinuxInputMouseHandler (const QString &key, const QString &specification)

	~QLinuxInputMouseHandler ()

Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...

const QObjectList &	children () const
	Returns a list of child objects. More...

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

bool	disconnect (const char signal=0, const QObject receiver=0, const char *member=0)

bool	disconnect (const QObject receiver, const char member=0)

void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...

void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...

QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...

virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...

virtual bool	eventFilter (QObject , QEvent )
	Filters events if this object has been installed as an event filter for the watched object. More...

template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...

template<typename T >
QList< T >	findChildren (const QString &aName=QString()) 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. More...

template<typename T >
QList< T >	findChildren (const QRegExp &re) const

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. More...

void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...

bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...

void	killTimer (int id)
	Kills the timer with timer identifier, id. More...

virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...

void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...

QString	objectName () const

QObject *	parent () const
	Returns a pointer to the parent object. More...

QVariant	property (const char *name) const
	Returns the value of the object's name property. More...

Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...

void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...

void	setObjectName (const QString &name)

void	setParent (QObject *)
	Makes the object a child of parent. More...

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...

void	setUserData (uint id, QObjectUserData *data)

bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...

int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...

QThread *	thread () const
	Returns the thread in which the object lives. More...

QObjectUserData *	userData (uint id) const

virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Private Slots
void	readMouseData ()

Private Functions
void	sendMouseEvent (int x, int y, Qt::MouseButtons buttons)

Properties
QLinuxInputMouseHandlerData *	d

Qt::MouseButtons	m_buttons

bool	m_compression

int	m_fd

int	m_jitterLimitSquared

QSocketNotifier *	m_notify

int	m_prevx

int	m_prevy

bool	m_smooth

int	m_smoothx

int	m_smoothy

int	m_x

int	m_xoffset

int	m_y

int	m_yoffset

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...

Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...

Static Public Functions inherited from QObject
static bool	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...

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

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	Disconnects signal in object sender from method in object receiver. More...

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

static uint	registerUserData ()

static QString	tr (const char sourceText, const char comment=0, int n=-1)

static QString	trUtf8 (const char sourceText, const char comment=0, int n=-1)

Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...

Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...

virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...

virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...

virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...

	QObject (QObjectPrivate &dd, QObject *parent=0)

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...

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 0. More...

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...

Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject

Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

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

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()

T *	qobject_cast (QObject *object)

	QObjectList

void *	qt_find_obj_child (QObject parent, const char type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 57 of file qlinuxinput.h.

Constructors and Destructors

◆ QLinuxInputMouseHandler()

QLinuxInputMouseHandler::QLinuxInputMouseHandler	(	const QString &	key,
		const QString &	specification
	)

Definition at line 132 of file qlinuxinput.cpp.

     : m_notify(0), m_x(0), m_y(0), m_prevx(0), m_prevy(0), m_xoffset(0), m_yoffset(0), m_buttons(0), d(0)
 {
     qDebug() << "QLinuxInputMouseHandler" << key << specification;
 
 
     setObjectName(QLatin1String("LinuxInputSubsystem Mouse Handler"));
 
     QString dev = QLatin1String("/dev/input/event0");
     m_compression = true;
     m_smooth = false;
     int jitterLimit = 0;
     
     QStringList args = specification.split(QLatin1Char(':'));
     foreach (const QString &arg, args) {
         if (arg == "nocompress")
             m_compression = false;
         else if (arg.startsWith("dejitter="))
             jitterLimit = arg.mid(9).toInt();
         else if (arg.startsWith("xoffset="))
             m_xoffset = arg.mid(8).toInt();
         else if (arg.startsWith("yoffset="))
             m_yoffset = arg.mid(8).toInt();
         else if (arg.startsWith(QLatin1String("/dev/")))
             dev = arg;
     }
     m_jitterLimitSquared = jitterLimit*jitterLimit; 
     
     m_fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);
     if (m_fd >= 0) {
         m_notify = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
         connect(m_notify, SIGNAL(activated(int)), this, SLOT(readMouseData()));
     } else {
         qWarning("Cannot open mouse input device '%s': %s", qPrintable(dev), strerror(errno));
         return;
     }
 #ifdef QT_QPA_EXPERIMENTAL_TOUCHEVENT
     d = new QLinuxInputMouseHandlerData;
 #endif    
 }

◆ ~QLinuxInputMouseHandler()

QLinuxInputMouseHandler::~QLinuxInputMouseHandler ( )

Definition at line 175 of file qlinuxinput.cpp.

 {
     if (m_fd >= 0)
         QT_CLOSE(m_fd);
 #ifdef QT_QPA_EXPERIMENTAL_TOUCHEVENT
     delete d;
 #endif
 }

Functions

◆ readMouseData

void QLinuxInputMouseHandler::readMouseData ( )

privateslot

Definition at line 192 of file qlinuxinput.cpp.

Referenced by QLinuxInputMouseHandler().

 {
     struct ::input_event buffer[32];
     int n = 0;
     bool posChanged = false;
     bool pendingMouseEvent = false;
     int eventCompressCount = 0;
     forever {
         n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
 
         if (n == 0) {
             qWarning("Got EOF from the input device.");
             return;
         } else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {
             qWarning("Could not read from input device: %s", strerror(errno));
             return;
         } else if (n % sizeof(buffer[0]) == 0) {
             break;
         }
     }
 
     n /= sizeof(buffer[0]);
 
     for (int i = 0; i < n; ++i) {
         struct ::input_event *data = &buffer[i];
         //qDebug() << ">>" << hex << data->type << data->code << dec << data->value;
         bool unknown = false;
         if (data->type == EV_ABS) {
             if (data->code == ABS_X && m_x != data->value) {
                 m_x = data->value;
                 posChanged = true;
             } else if (data->code == ABS_Y && m_y != data->value) {
                 m_y = data->value;
                 posChanged = true;
             } else if (data->code == ABS_PRESSURE) {
                 //ignore for now...
             } else if (data->code == ABS_TOOL_WIDTH) {
                 //ignore for now...
             } else if (data->code == ABS_HAT0X) {
                 //ignore for now...
             } else if (data->code == ABS_HAT0Y) {
                 //ignore for now...
 #ifdef QT_QPA_EXPERIMENTAL_TOUCHEVENT
             } else if (data->code == ABS_MT_POSITION_X) {
                 d->currentX = data->value;
                 d->seenMT = true;
             } else if (data->code == ABS_MT_POSITION_Y) {
                 d->currentY = data->value;
                 d->seenMT = true;
             } else if (data->code == ABS_MT_TOUCH_MAJOR) {
                 if (data->value == 0)
                     d->setCurrentState(Qt::TouchPointReleased);
                 //otherwise, ignore for now...
             } else if (data->code == ABS_MT_TOUCH_MINOR) {
                 //ignore for now...
 #endif
             } else {
                 unknown = true;
             }
         } else if (data->type == EV_REL) {
             if (data->code == REL_X) {
                 m_x += data->value;
                 posChanged = true;
             } else if (data->code == REL_Y) {
                 m_y += data->value;
                 posChanged = true;
             } else if (data->code == ABS_WHEEL) { // vertical scroll
                 // data->value: 1 == up, -1 == down
                 int delta = 120 * data->value;
                 QWindowSystemInterface::handleWheelEvent(0, QPoint(m_x, m_y),
                                                       QPoint(m_x, m_y),
                                                       delta, Qt::Vertical);
             } else if (data->code == ABS_THROTTLE) { // horizontal scroll
                 // data->value: 1 == right, -1 == left
                 int delta = 120 * -data->value;
                 QWindowSystemInterface::handleWheelEvent(0, QPoint(m_x, m_y),
                                                       QPoint(m_x, m_y),
                                                       delta, Qt::Horizontal);
             } else {
                 unknown = true;
             }
         } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
             m_buttons = data->value ? Qt::LeftButton : Qt::NoButton;
 
             posChanged = true;
             pendingMouseEvent = false;
         } else if (data->type == EV_KEY && data->code >= BTN_LEFT && data->code <= BTN_MIDDLE) {
             Qt::MouseButton button = Qt::NoButton;
             switch (data->code) {
             case BTN_LEFT: button = Qt::LeftButton; break;
             case BTN_MIDDLE: button = Qt::MidButton; break;
             case BTN_RIGHT: button = Qt::RightButton; break;
             }
             if (data->value)
                 m_buttons |= button;
             else
                 m_buttons &= ~button;
             sendMouseEvent(m_x, m_y, m_buttons);
             pendingMouseEvent = false;
         } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
             if (posChanged) {
                 posChanged = false;
                 if (m_compression) {
                     pendingMouseEvent = true;
                     eventCompressCount++;
                 } else {
                     sendMouseEvent(m_x, m_y, m_buttons);
                 }
             }
 #ifdef QT_QPA_EXPERIMENTAL_TOUCHEVENT
             if (d->state == QEvent::TouchBegin && !d->seenMT) {
                 //no multipoint-touch events to send
             } else {
                 if (!d->seenMT)
                     d->state = QEvent::TouchEnd;
 
                 for (int i = d->currentPoint(); i < d->touchPoints.size(); ++i) {
                     d->touchPoints[i].pressure = 0;
                     d->touchPoints[i].state = Qt::TouchPointReleased;
                 }
                 //qDebug() << "handleTouchEvent" << d->state << d->touchPoints.size() << d->touchPoints[0].state;
                 QWindowSystemInterface::handleTouchEvent(0, d->state, QTouchEvent::TouchScreen, d->touchPoints);
                 if (d->seenMT) {
                     d->state = QEvent::TouchUpdate;
                 } else {
                     d->state = QEvent::TouchBegin;
                     d->touchPoints.clear();
                 }
                 d->setCurrentPoint(0);
                 d->seenMT = false;
             }
         } else if (data->type == EV_SYN && data->code == SYN_MT_REPORT) {
             //store data for this touch point
 
             if (!d->seenMT) {
                 d->setCurrentState(Qt::TouchPointReleased);
             } else if (d->currentState() == Qt::TouchPointReleased) {
                 d->updateCurrentPos();
                 d->setCurrentState(Qt::TouchPointPressed);
             } else if (d->currentMoved()) {
                 d->updateCurrentPos();
                 d->setCurrentState(Qt::TouchPointMoved);
             } else  {
                 d->setCurrentState(Qt::TouchPointStationary);
             }
             //qDebug() << "end of point" << d->currentPoint() << d->currentX << d->currentY << d->currentState();
 
             //advance to next tp:
             d->advanceCurrentPoint();
 #endif
         } else if (data->type == EV_MSC && data->code == MSC_SCAN) {
             // kernel encountered an unmapped key - just ignore it
             continue;
         } else {
             unknown = true;
         }
 #ifdef QLINUXINPUT_EXTRA_DEBUG
         if (unknown) {
             qWarning("unknown mouse event type=%x, code=%x, value=%x", data->type, data->code, data->value);
         }
 #endif        
     }
     if (m_compression && pendingMouseEvent) {
         int distanceSquared = (m_x - m_prevx)*(m_x - m_prevx) + (m_y - m_prevy)*(m_y - m_prevy);
         if (distanceSquared > m_jitterLimitSquared)
             sendMouseEvent(m_x, m_y, m_buttons);
     }
 }

◆ sendMouseEvent()

void QLinuxInputMouseHandler::sendMouseEvent	(	int	x,
		int	y,
		Qt::MouseButtons	buttons
	)

private

Definition at line 184 of file qlinuxinput.cpp.

Referenced by readMouseData().

 {
     QPoint pos(x+m_xoffset, y+m_yoffset);
     QWindowSystemInterface::handleMouseEvent(0, pos, pos, m_buttons);
     m_prevx = x;
     m_prevy = y;
 }

Properties

◆ d

QLinuxInputMouseHandlerData* QLinuxInputMouseHandler::d

private

Definition at line 79 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler(), readMouseData(), and ~QLinuxInputMouseHandler().

◆ m_buttons

Qt::MouseButtons QLinuxInputMouseHandler::m_buttons

private

Definition at line 75 of file qlinuxinput.h.

Referenced by readMouseData(), and sendMouseEvent().

◆ m_compression

bool QLinuxInputMouseHandler::m_compression

private

Definition at line 76 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler(), and readMouseData().

◆ m_fd

int QLinuxInputMouseHandler::m_fd

private

Definition at line 70 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler(), readMouseData(), and ~QLinuxInputMouseHandler().

◆ m_jitterLimitSquared

int QLinuxInputMouseHandler::m_jitterLimitSquared

private

Definition at line 78 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler(), and readMouseData().

◆ m_notify

QSocketNotifier* QLinuxInputMouseHandler::m_notify

private

Definition at line 69 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler().

◆ m_prevx

int QLinuxInputMouseHandler::m_prevx

private

Definition at line 72 of file qlinuxinput.h.

Referenced by readMouseData(), and sendMouseEvent().

◆ m_prevy

int QLinuxInputMouseHandler::m_prevy

private

Definition at line 72 of file qlinuxinput.h.

Referenced by readMouseData(), and sendMouseEvent().

◆ m_smooth

bool QLinuxInputMouseHandler::m_smooth

private

Definition at line 77 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler().

◆ m_smoothx

int QLinuxInputMouseHandler::m_smoothx

private

Definition at line 74 of file qlinuxinput.h.

◆ m_smoothy

int QLinuxInputMouseHandler::m_smoothy

private

Definition at line 74 of file qlinuxinput.h.

◆ m_x

int QLinuxInputMouseHandler::m_x

private

Definition at line 71 of file qlinuxinput.h.

Referenced by readMouseData().

◆ m_xoffset

int QLinuxInputMouseHandler::m_xoffset

private

Definition at line 73 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler(), and sendMouseEvent().

◆ m_y

int QLinuxInputMouseHandler::m_y

private

Definition at line 71 of file qlinuxinput.h.

Referenced by readMouseData().

◆ m_yoffset

int QLinuxInputMouseHandler::m_yoffset

private

Definition at line 73 of file qlinuxinput.h.

Referenced by QLinuxInputMouseHandler(), and sendMouseEvent().

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

/src/plugins/generic/linuxinput/qlinuxinput.h
/src/plugins/generic/linuxinput/qlinuxinput.cpp

Public Functions

Private Slots

Private Functions

Properties

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QLinuxInputMouseHandler()

◆ ~QLinuxInputMouseHandler()

Functions

◆ readMouseData

◆ sendMouseEvent()

Properties

◆ d

◆ m_buttons

◆ m_compression

◆ m_fd

◆ m_jitterLimitSquared

◆ m_notify

◆ m_prevx

◆ m_prevy

◆ m_smooth

◆ m_smoothx

◆ m_smoothy

◆ m_x

◆ m_xoffset

◆ m_y

◆ m_yoffset