QFbScreen Class Reference

#include <fb_base.h>

Inheritance diagram for QFbScreen:

Public Functions
virtual void	addWindow (QFbWindow *surface)
virtual int	depth () const
	Reimplement in subclass to return current depth of the screen. More...
virtual QImage::Format	format () const
	Reimplement in subclass to return the image format which corresponds to the screen format. More...
virtual QRect	geometry () const
	Reimplement in subclass to return the pixel geometry of the screen. More...
QImage *	image () const
virtual void	lower (QPlatformWindow *surface)
QPaintDevice *	paintDevice () const
virtual QSize	physicalSize () const
	Reimplement this function in subclass to return the physical size of the screen. More...
	QFbScreen ()
virtual void	raise (QPlatformWindow *surface)
virtual void	removeWindow (QFbWindow *surface)
virtual void	setDepth (int depth)
virtual void	setDirty (const QRect &rect)
virtual void	setFormat (QImage::Format format)
virtual void	setGeometry (QRect rect)
virtual void	setPhysicalSize (QSize size)
virtual QWidget *	topLevelAt (const QPoint &p) const
	Return the given top level widget for a given position. More...
	~QFbScreen ()
Public Functions inherited from QPlatformScreen
virtual QRect	availableGeometry () const
	Reimplement in subclass to return the pixel geometry of the available space This normally is the desktop screen minus the task manager, global menubar etc. More...
virtual	~QPlatformScreen ()
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...

Protected Slots
virtual QRegion	doRedraw ()

Protected Variables
QPlatformSoftwareCursor *	cursor
int	mDepth
QImage::Format	mFormat
QRect	mGeometry
QSize	mPhysicalSize
QImage *	mScreenImage
QTimer	redrawTimer
QRegion	repaintRegion
QList< QFbWindow * >	windowStack
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Private Functions
void	generateRects ()
void	invalidateRectCache ()

Properties
QList< QPair< QRect, int > >	cachedRects
QPainter *	compositePainter
bool	isUpToDate

Friends
class	QFbWindow
class	QFbWindowSurface

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 QPlatformScreen
static QPlatformScreen *	platformScreenForWidget (const QWidget *widget)
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...
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 155 of file fb_base.h.

Constructors and Destructors

QFbScreen()

QFbScreen::QFbScreen

(

)

Definition at line 144 of file fb_base.cpp.

                     : cursor(0), mGeometry(), mDepth(16), mFormat(QImage::Format_RGB16), mScreenImage(0), compositePainter(0), isUpToDate(false)
{
    mScreenImage = new QImage(mGeometry.size(), mFormat);
    redrawTimer.setSingleShot(true);
    redrawTimer.setInterval(0);
    QObject::connect(&redrawTimer, SIGNAL(timeout()), this, SLOT(doRedraw()));
}

~QFbScreen()

QFbScreen::~QFbScreen

(

)

Definition at line 181 of file fb_base.cpp.

{
    delete compositePainter;
    delete mScreenImage;
}

Functions

addWindow()

void QFbScreen::addWindow ( QFbWindow *  surface )

virtual

Definition at line 305 of file fb_base.cpp.

Referenced by QLinuxFbIntegration::createPlatformWindow(), QVNCIntegration::createPlatformWindow(), and QVNCIntegration::moveToScreen().

{
    windowStack.prepend(surface);
    surface->mScreens.append(this);
    invalidateRectCache();
    setDirty(surface->geometry());
}

depth()

virtual int QFbScreen::depth ( ) const

inlinevirtual

Reimplement in subclass to return current depth of the screen.

Implements QPlatformScreen.

Definition at line 163 of file fb_base.h.

Referenced by QVNCServer::convertPixels(), QVNCScreen::initDevice(), QVNCServer::pixelConversionNeeded(), QVNCDirtyMap::QVNCDirtyMap(), QVNCScreenPrivate::QVNCScreenPrivate(), QRfbSingleColorHextile< SRC >::read(), QVNCServer::readClient(), setDepth(), and QVNCServer::setEncodings().

{ return mDepth; }

doRedraw

QRegion QFbScreen::doRedraw ( )

protectedvirtualslot

Reimplemented in QVNCScreen.

Definition at line 229 of file fb_base.cpp.

Referenced by QLinuxFbScreen::doRedraw(), QVNCScreen::doRedraw(), and QFbScreen().

{
    QPoint screenOffset = mGeometry.topLeft();

    QRegion touchedRegion;
    if (cursor && cursor->isDirty() && cursor->isOnScreen()) {
        QRect lastCursor = cursor->dirtyRect();
        repaintRegion += lastCursor;
    }
    if (repaintRegion.isEmpty() && (!cursor || !cursor->isDirty())) {
        return touchedRegion;
    }

    QVector<QRect> rects = repaintRegion.rects();

    if (!isUpToDate)
        generateRects();

    if (!compositePainter)
        compositePainter = new QPainter(mScreenImage);
    for (int rectIndex = 0; rectIndex < repaintRegion.numRects(); rectIndex++) {
        QRegion rectRegion = rects[rectIndex];

        for(int i = 0; i < cachedRects.length(); i++) {
            QRect screenSubRect = cachedRects[i].first;
            int layer = cachedRects[i].second;
            QRegion intersect = rectRegion.intersected(screenSubRect);

            if (intersect.isEmpty())
                continue;

            rectRegion -= intersect;

            // we only expect one rectangle, but defensive coding...
            foreach (QRect rect, intersect.rects()) {
                bool firstLayer = true;
                if (layer == -1) {
                    compositePainter->fillRect(rect, Qt::black);
                    firstLayer = false;
                    layer = windowStack.size() - 1;
                }

                for (int layerIndex = layer; layerIndex != -1; layerIndex--) {
                    if (!windowStack[layerIndex]->visible())
                        continue;
                    if (windowStack[layerIndex]->widget()->isMinimized())
                        continue;
                    QRect windowRect = windowStack[layerIndex]->geometry().translated(-screenOffset);
                    QRect windowIntersect = rect.translated(-windowRect.left(),
                                                            -windowRect.top());
                    compositePainter->drawImage(rect, windowStack[layerIndex]->surface->image(),
                                                windowIntersect);
                    if (firstLayer) {
                        firstLayer = false;
                    }
                }
            }
        }
    }

    QRect cursorRect;
    if (cursor && (cursor->isDirty() || repaintRegion.intersects(cursor->lastPainted()))) {
        cursorRect = cursor->drawCursor(*compositePainter);
        touchedRegion += cursorRect;
    }
    touchedRegion += repaintRegion;
    repaintRegion = QRegion();



//    qDebug() << "QFbScreen::doRedraw"  << windowStack.size() << mScreenImage->size() << touchedRegion;


    return touchedRegion;
}

format()

virtual QImage::Format QFbScreen::format ( ) const

inlinevirtual

Reimplement in subclass to return the image format which corresponds to the screen format.

Implements QPlatformScreen.

Definition at line 164 of file fb_base.h.

Referenced by QFbWindowSurface::QFbWindowSurface(), QFbWindowSurface::resize(), QLinuxFbScreen::setFormat(), and setFormat().

{ return mFormat; }

generateRects()

void QFbScreen::generateRects ( )

private

Definition at line 197 of file fb_base.cpp.

Referenced by doRedraw().

{
    cachedRects.clear();
    QPoint screenOffset = mGeometry.topLeft();
    QRegion remainingScreen(mGeometry.translated(-screenOffset)); // global to local translation

    for (int i = 0; i < windowStack.length(); i++) {
        if (remainingScreen.isEmpty())
            break;
        if (!windowStack[i]->visible())
            continue;
        if (windowStack[i]->widget()->isMinimized())
            continue;

        if (!windowStack[i]->widget()->testAttribute(Qt::WA_TranslucentBackground)) {
            QRect localGeometry = windowStack.at(i)->geometry().translated(-screenOffset); // global to local translation
            remainingScreen -= localGeometry;
            QRegion windowRegion(localGeometry);
            windowRegion -= remainingScreen;
            foreach(QRect rect, windowRegion.rects()) {
                cachedRects += QPair<QRect, int>(rect, i);
            }
        }
    }
    foreach (QRect rect, remainingScreen.rects())
        cachedRects += QPair<QRect, int>(rect, -1);
    isUpToDate = true;
    return;
}

geometry()

virtual QRect QFbScreen::geometry ( ) const

inlinevirtual

Reimplement in subclass to return the pixel geometry of the screen.

Implements QPlatformScreen.

Definition at line 162 of file fb_base.h.

Referenced by buttonChange(), QVNCDirtyMap::QVNCDirtyMap(), QVNCScreen::QVNCScreen(), and topLevelAt().

{ return mGeometry; }

image()

QImage* QFbScreen::image ( ) const

inline

Definition at line 180 of file fb_base.h.

Referenced by QVNCScreen::base(), QVNCIntegration::grabWindow(), and QVNCScreen::linestep().

{ return mScreenImage; }

invalidateRectCache()

void QFbScreen::invalidateRectCache ( )

inlineprivate

Definition at line 204 of file fb_base.h.

Referenced by addWindow(), lower(), raise(), removeWindow(), and setGeometry().

{ isUpToDate = false; }

lower()

void QFbScreen::lower ( QPlatformWindow *  surface )

virtual

Definition at line 352 of file fb_base.cpp.

{
    QFbWindow *s = static_cast<QFbWindow *>(surface);
    int index = windowStack.indexOf(s);
    if (index == -1 || index == (windowStack.size() - 1))
        return;
    windowStack.move(index, windowStack.size() - 1);
    invalidateRectCache();
    setDirty(s->geometry());
}

paintDevice()

QPaintDevice* QFbScreen::paintDevice ( ) const

inline

Definition at line 181 of file fb_base.h.

{ return mScreenImage; }

physicalSize()

virtual QSize QFbScreen::physicalSize ( ) const

inlinevirtual

Reimplement this function in subclass to return the physical size of the screen.

This function is used by QFont to convert point sizes to pixel sizes.

The default implementation takes the pixel size of the screen, considers a resolution of 100 dots per inch, and returns the calculated physical size. A device with a screen that has different resolutions will need to be supported by a suitable reimplementation of this function.

Reimplemented from QPlatformScreen.

Definition at line 165 of file fb_base.h.

{ return mPhysicalSize; }

raise()

void QFbScreen::raise ( QPlatformWindow *  surface )

virtual

Definition at line 331 of file fb_base.cpp.

{
    QFbWindow *s = static_cast<QFbWindow *>(surface);
    int index = windowStack.indexOf(s);
    if (index <= 0)
        return;
    windowStack.move(index, 0);
    invalidateRectCache();
    setDirty(s->geometry());
}

removeWindow()

void QFbScreen::removeWindow ( QFbWindow *  surface )

virtual

Definition at line 313 of file fb_base.cpp.

Referenced by QVNCIntegration::moveToScreen().

{
    windowStack.removeOne(surface);
    surface->mScreens.removeOne(this);
    invalidateRectCache();
    setDirty(surface->geometry());
}

setDepth()

void QFbScreen::setDepth ( int  depth )

virtual

Definition at line 162 of file fb_base.cpp.

Referenced by QVNCScreen::QVNCScreen().

{
    mDepth = depth;
}

setDirty()

void QFbScreen::setDirty ( const QRect &  rect )

virtual

Reimplemented from QPlatformScreen.

Reimplemented in QLinuxFbScreen, and QVNCScreen.

Definition at line 187 of file fb_base.cpp.

Referenced by addWindow(), lower(), raise(), and removeWindow().

{
    QRect intersection = rect.intersected(mGeometry);
    QPoint screenOffset = mGeometry.topLeft();
    repaintRegion += intersection.translated(-screenOffset);    // global to local translation
    if (!redrawTimer.isActive()) {
        redrawTimer.start();
    }
}

setFormat()

void QFbScreen::setFormat ( QImage::Format  format )

virtual

Reimplemented in QLinuxFbScreen.

Definition at line 172 of file fb_base.cpp.

Referenced by QVNCScreen::QVNCScreen().

{
    mFormat = format;
    delete mScreenImage;
    mScreenImage = new QImage(mGeometry.size(), mFormat);
    delete compositePainter;
    compositePainter = 0;
}

setGeometry()

void QFbScreen::setGeometry ( QRect  rect )

virtual

Reimplemented in QLinuxFbScreen.

Definition at line 152 of file fb_base.cpp.

Referenced by QVNCScreen::QVNCScreen().

{
    delete mScreenImage;
    mGeometry = rect;
    mScreenImage = new QImage(mGeometry.size(), mFormat);
    delete compositePainter;
    compositePainter = 0;
    invalidateRectCache();
}

setPhysicalSize()

void QFbScreen::setPhysicalSize ( QSize  size )

virtual

Definition at line 167 of file fb_base.cpp.

Referenced by QLinuxFbIntegration::QLinuxFbIntegration(), and QVNCScreen::QVNCScreen().

{
    mPhysicalSize = size;
}

topLevelAt()

QWidget * QFbScreen::topLevelAt ( const QPoint &  pos ) const

virtual

Return the given top level widget for a given position.

Default implementation retrieves a list of all top level widgets and finds the first widget which contains point pos

Reimplemented from QPlatformScreen.

Definition at line 363 of file fb_base.cpp.

{
    for(int i = 0; i < windowStack.size(); i++) {
        if (windowStack[i]->geometry().contains(p, false) &&
            windowStack[i]->visible() &&
            !windowStack[i]->widget()->isMinimized()) {
            return windowStack[i]->widget();
        }
    }
    return 0;
}

Friends and Related Functions

QFbWindow

friend class QFbWindow

friend

Definition at line 206 of file fb_base.h.

QFbWindowSurface

friend class QFbWindowSurface

friend

Definition at line 205 of file fb_base.h.

Properties

cachedRects

QList<QPair<QRect, int> > QFbScreen::cachedRects

private

Definition at line 202 of file fb_base.h.

Referenced by doRedraw(), and generateRects().

compositePainter

QPainter* QFbScreen::compositePainter

private

Definition at line 200 of file fb_base.h.

Referenced by doRedraw(), setFormat(), setGeometry(), and ~QFbScreen().

cursor

QPlatformSoftwareCursor* QFbScreen::cursor

protected

Definition at line 186 of file fb_base.h.

Referenced by doRedraw(), QLinuxFbScreen::QLinuxFbScreen(), and QVNCScreen::QVNCScreen().

isUpToDate

bool QFbScreen::isUpToDate

private

Definition at line 207 of file fb_base.h.

Referenced by doRedraw(), and generateRects().

mDepth

int QFbScreen::mDepth

protected

Definition at line 194 of file fb_base.h.

Referenced by QLinuxFbScreen::QLinuxFbScreen(), and setDepth().

mFormat

QImage::Format QFbScreen::mFormat

protected

Definition at line 195 of file fb_base.h.

Referenced by QFbScreen(), QLinuxFbScreen::QLinuxFbScreen(), QLinuxFbScreen::setFormat(), setFormat(), QLinuxFbScreen::setGeometry(), and setGeometry().

mGeometry

QRect QFbScreen::mGeometry

protected

Definition at line 193 of file fb_base.h.

Referenced by doRedraw(), generateRects(), QFbScreen(), QLinuxFbScreen::QLinuxFbScreen(), setDirty(), QLinuxFbScreen::setFormat(), setFormat(), QLinuxFbScreen::setGeometry(), and setGeometry().

mPhysicalSize

QSize QFbScreen::mPhysicalSize

protected

Definition at line 196 of file fb_base.h.

Referenced by setPhysicalSize().

mScreenImage

QImage* QFbScreen::mScreenImage

protected

Definition at line 197 of file fb_base.h.

Referenced by QLinuxFbScreen::doRedraw(), doRedraw(), QFbScreen(), QLinuxFbScreen::QLinuxFbScreen(), QLinuxFbScreen::setFormat(), setFormat(), QLinuxFbScreen::setGeometry(), setGeometry(), and ~QFbScreen().

redrawTimer

QTimer QFbScreen::redrawTimer

protected

Definition at line 187 of file fb_base.h.

Referenced by QFbScreen(), and setDirty().

repaintRegion

QRegion QFbScreen::repaintRegion

protected

Definition at line 185 of file fb_base.h.

Referenced by doRedraw(), and setDirty().

windowStack

QList<QFbWindow *> QFbScreen::windowStack

protected

Definition at line 184 of file fb_base.h.

Referenced by addWindow(), doRedraw(), generateRects(), lower(), QVNCIntegration::moveToScreen(), raise(), removeWindow(), and topLevelAt().

---

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

• /src/plugins/platforms/fb_base/fb_base.h
• /src/plugins/platforms/fb_base/fb_base.cpp