QWaylandSurface Class

The QWaylandSurface class represents a rectangular area on an output device. More...

Header: #include <QWaylandSurface>
qmake: QT += waylandcompositor
Since: Qt 5.8
Inherits: QWaylandObject

Public Types

enum Origin { OriginTopLeft, OriginBottomLeft }


  • 1 property inherited from QObject

Public Functions

QWaylandSurface(QWaylandCompositor *compositor, QWaylandClient *client, uint id, int version)
virtual ~QWaylandSurface() override
int bufferScale() const
QWaylandClient *client() const
QWaylandCompositor *compositor() const
Qt::ScreenOrientation contentOrientation() const
void destroy()
void frameStarted()
bool hasContent() const
void initialize(QWaylandCompositor *compositor, QWaylandClient *client, uint id, int version)
QWaylandInputMethodControl *inputMethodControl() const
bool inputRegionContains(const QPoint &p) const
bool isCursorSurface() const
bool isDestroyed() const
bool isInitialized() const
void markAsCursorSurface(bool cursorSurface)
QWaylandSurface::Origin origin() const
QWaylandView *primaryView() const
struct wl_resource *resource() const
QWaylandSurfaceRole *role() const
void sendFrameCallbacks()
void setPrimaryView(QWaylandView *view)
bool setRole(QWaylandSurfaceRole *role, wl_resource *errorResource, uint32_t errorCode)
QSize size() const
QList<QWaylandView *> views() const
::wl_client *waylandClient() const
  • 31 public functions inherited from QObject

Public Slots

  • 1 public slot inherited from QObject


void bufferScaleChanged()
void childAdded(QWaylandSurface *child)
void configure(bool hasBuffer)
void contentOrientationChanged()
void cursorSurfaceChanged()
void damaged(const QRegion &rect)
void dragStarted(QWaylandDrag *drag)
void hasContentChanged()
void offsetForNextFrame(const QPoint &offset)
void originChanged()
void parentChanged(QWaylandSurface *newParent, QWaylandSurface *oldParent)
void redraw()
void sizeChanged()
void subsurfacePlaceAbove(QWaylandSurface *sibling)
void subsurfacePlaceBelow(QWaylandSurface *sibling)
void subsurfacePositionChanged(const QPoint &position)
void surfaceDestroyed()

Static Public Members

QWaylandSurface *fromResource(::wl_resource *res)
const QMetaObject staticMetaObject
  • 9 static public members inherited from QObject

Additional Inherited Members

  • 9 protected functions inherited from QObject

Detailed Description

The QWaylandSurface class represents a rectangular area on an output device.

This class encapsulates a rectangular area of pixels that is displayed on an output device. It corresponds to the interface wl_surface in the Wayland protocol.

Member Type Documentation

enum QWaylandSurface::Origin

This enum type is used to specify the origin of a QWaylandSurface's buffer.

QWaylandSurface::OriginTopLeft0The origin is the top left corner of the buffer.
QWaylandSurface::OriginBottomLeft1The origin is the bottom left corner of the buffer.

Property Documentation

bufferScale : const int

This property holds the QWaylandSurface's buffer scale. The buffer scale lets a client supply higher resolution buffer data for use on high resolution outputs.

Access functions:

int bufferScale() const

Notifier signal:

void bufferScaleChanged()

client : QWaylandClient* const

This property holds the client using this QWaylandSurface.

Access functions:

QWaylandClient *client() const

contentOrientation : const Qt::ScreenOrientation

This property holds the orientation of the QWaylandSurface's contents.

Access functions:

Qt::ScreenOrientation contentOrientation() const

Notifier signal:

void contentOrientationChanged()

See also QWaylandOutput::transform.

cursorSurface : bool

This property holds whether the QWaylandSurface is a cursor surface.

Access functions:

bool isCursorSurface() const
void markAsCursorSurface(bool cursorSurface)

Notifier signal:

void cursorSurfaceChanged()

hasContent : const bool

This property holds whether the QWaylandSurface has content.

Access functions:

bool hasContent() const

Notifier signal:

void hasContentChanged()

origin : const QWaylandSurface::Origin

This property holds the origin of the QWaylandSurface's buffer, or QWaylandSurface::OriginTopLeft if the surface has no buffer.

Access functions:

QWaylandSurface::Origin origin() const

Notifier signal:

void originChanged()

size : const QSize

This property holds the QWaylandSurface's size in pixels.

Access functions:

QSize size() const

Notifier signal:

void sizeChanged()

Member Function Documentation


Constructs a an uninitialized QWaylandSurface.

QWaylandSurface::QWaylandSurface(QWaylandCompositor *compositor, QWaylandClient *client, uint id, int version)

Constructs and initializes a QWaylandSurface for the given compositor and client, and with the given id and version.

[override virtual] QWaylandSurface::~QWaylandSurface()

Destroys the QWaylandSurface.

[signal] void QWaylandSurface::childAdded(QWaylandSurface *child)

This signal is emitted when a wl_subsurface, child, has been added to the surface.

QWaylandCompositor *QWaylandSurface::compositor() const

Returns the compositor for this QWaylandSurface.

[signal] void QWaylandSurface::configure(bool hasBuffer)

[signal] void QWaylandSurface::damaged(const QRegion &rect)

void QWaylandSurface::destroy()

Destroys the QWaylandSurface.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[signal] void QWaylandSurface::dragStarted(QWaylandDrag *drag)

This signal is emitted when a drag has started from this surface.

void QWaylandSurface::frameStarted()

Prepares all frame callbacks for sending.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[static] QWaylandSurface *QWaylandSurface::fromResource(::wl_resource *res)

Returns the QWaylandSurface corresponding to the Wayland resource res.

void QWaylandSurface::initialize(QWaylandCompositor *compositor, QWaylandClient *client, uint id, int version)

Initializes the QWaylandSurface with the given compositor and client, and with the given id and version.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

QWaylandInputMethodControl *QWaylandSurface::inputMethodControl() const

bool QWaylandSurface::inputRegionContains(const QPoint &p) const

Returns true if the QWaylandSurface's input region contains the point p. Otherwise returns false.

bool QWaylandSurface::isDestroyed() const

Returns true if the QWaylandSurface has been destroyed. Otherwise returns false.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

bool QWaylandSurface::isInitialized() const

Returns true if the QWaylandSurface has been initialized.

[signal] void QWaylandSurface::offsetForNextFrame(const QPoint &offset)

[signal] void QWaylandSurface::parentChanged(QWaylandSurface *newParent, QWaylandSurface *oldParent)

QWaylandView *QWaylandSurface::primaryView() const

Returns this QWaylandSurface's primary view.

See also QWaylandView::advance() and QWaylandSurface::setPrimaryView().

[signal] void QWaylandSurface::redraw()

struct wl_resource *QWaylandSurface::resource() const

Returns the Wayland resource corresponding to this QWaylandSurface.

QWaylandSurfaceRole *QWaylandSurface::role() const

See also setRole().

void QWaylandSurface::sendFrameCallbacks()

Sends pending frame callbacks.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

void QWaylandSurface::setPrimaryView(QWaylandView *view)

Sets this QWaylandSurface's primary view to view, in case there are multiple views of this surface. The primary view is the view that governs the client's refresh rate. It takes care of discarding buffer references when QWaylandView::advance() is called. See the documentation for QWaylandView::advance() for more details.

In shell surface integrations, such as QWaylandWlShellIntegration and QWaylandXdgShellV5Integration, maximize and fullscreen requests from the client will only have an effect if the integration has the primary view of the surface.

See also primaryView() and QWaylandView::advance().

bool QWaylandSurface::setRole(QWaylandSurfaceRole *role, wl_resource *errorResource, uint32_t errorCode)

Sets a role on the surface. A role defines how a surface will be mapped on screen, without a role a surface is supposed to be hidden. Only one role at all times can be set on a surface. Although setting the same role many times is allowed, attempting to change the role of a surface will trigger a protocol error to the errorResource and send an errorCode to the client.

See also role().

[signal] void QWaylandSurface::subsurfacePlaceAbove(QWaylandSurface *sibling)

[signal] void QWaylandSurface::subsurfacePlaceBelow(QWaylandSurface *sibling)

[signal] void QWaylandSurface::subsurfacePositionChanged(const QPoint &position)

[signal] void QWaylandSurface::surfaceDestroyed()

This signal is emitted when the corresponing wl_surface is destroyed.

[slot] void QWaylandSurface::updateSelection()

Updates the surface with the compositor's retained clipboard selection. Although this is done automatically when the surface receives keyboard focus, this function is useful for updating clients which do not have keyboard focus.

QList<QWaylandView *> QWaylandSurface::views() const

Returns the views for this QWaylandSurface.

::wl_client *QWaylandSurface::waylandClient() const

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