Member Function Documentation

QBackingStore::QBackingStore(QWindow *window)

Constructs an empty surface for the given top-level window.

QBackingStore::~QBackingStore()

Destroys this surface.

void QBackingStore::beginPaint(const QRegion &region)

This function is called before painting onto the surface begins, with the region in which the painting will occur.

See also endPaint() and paintDevice().

void QBackingStore::endPaint()

This function is called after painting onto the surface has ended.

See also beginPaint() and paintDevice().

void QBackingStore::flush(const QRegion &region, QWindow *win = Q_NULLPTR, const QPoint &offset = QPoint())

Flushes the given region from the specified window win onto the screen.

Note that the offset parameter is currently unused.

QPlatformBackingStore *QBackingStore::handle() const

Returns a pointer to the QPlatformBackingStore implementation

bool QBackingStore::hasStaticContents() const

Returns a boolean indicating if this window has static contents or not.

QPaintDevice *QBackingStore::paintDevice()

Implement this function to return the appropriate paint device.

void QBackingStore::resize(const QSize &size)

Sets the size of the windowsurface to be size.

See also size().

bool QBackingStore::scroll(const QRegion &area, int dx, int dy)

Scrolls the given area dx pixels to the right and dy downward; both dx and dy may be negative.

Returns true if the area was scrolled successfully; false otherwise.

void QBackingStore::setStaticContents(const QRegion &region)

Set region as the static contents of this window.

See also staticContents().

QSize QBackingStore::size() const

Returns the current size of the windowsurface.

QRegion QBackingStore::staticContents() const

Returns a pointer to the QRegion that has the static contents of this window.

See also setStaticContents().

QWindow *QBackingStore::window() const

Returns a pointer to the top-level window associated with this surface.