QWaylandSeat Class

The QWaylandSeat class provides access to keyboard, mouse, and touch input. More...

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

This class was introduced in Qt 5.8.

Public Types

enum CapabilityFlag { Pointer, Keyboard, Touch, DefaultCapabilities }
flags CapabilityFlags

Properties

  • drag : QWaylandDrag* const
  • keymap : QWaylandKeymap* const

Public Functions

QWaylandSeat(QWaylandCompositor *compositor, QWaylandSeat::CapabilityFlags capabilityFlags = DefaultCapabilities)
virtual ~QWaylandSeat() override
QWaylandSeat::CapabilityFlags capabilities() const
QWaylandCompositor *compositor() const
QWaylandDrag *drag() const
virtual void initialize()
bool isInitialized() const
QWaylandKeyboard *keyboard() const
QWaylandSurface *keyboardFocus() const
QWaylandKeymap *keymap()
QWaylandView *mouseFocus() const
QWaylandPointer *pointer() const
void sendFullKeyEvent(QKeyEvent *event)
void sendFullTouchEvent(QWaylandSurface *surface, QTouchEvent *event)
void sendKeyEvent(int qtKey, bool pressed)
void sendKeyPressEvent(uint code)
void sendKeyReleaseEvent(uint code)
void sendMouseMoveEvent(QWaylandView *view, const QPointF &localPos, const QPointF &outputSpacePos = QPointF())
void sendMousePressEvent(Qt::MouseButton button)
void sendMouseReleaseEvent(Qt::MouseButton button)
void sendMouseWheelEvent(Qt::Orientation orientation, int delta)
void sendTouchCancelEvent(QWaylandClient *client)
void sendTouchFrameEvent(QWaylandClient *client)
uint sendTouchPointEvent(QWaylandSurface *surface, int id, const QPointF &point, Qt::TouchPointState state)
uint sendTouchPointMoved(QWaylandSurface *surface, int id, const QPointF &position)
uint sendTouchPointPressed(QWaylandSurface *surface, int id, const QPointF &position)
uint sendTouchPointReleased(QWaylandSurface *surface, int id, const QPointF &position)
bool setKeyboardFocus(QWaylandSurface *surface)
void setMouseFocus(QWaylandView *view)
QWaylandTouch *touch() const

Signals

void cursorSurfaceRequest(QWaylandSurface *surface, int hotspotX, int hotspotY)
void keyboardFocusChanged(QWaylandSurface *newFocus, QWaylandSurface *oldFocus)
void mouseFocusChanged(QWaylandView *newFocus, QWaylandView *oldFocus)

Static Public Members

QWaylandSeat *fromSeatResource(struct ::wl_resource *resource)

Detailed Description

The QWaylandSeat provides access to different types of user input and maintains a keyboard focus and a mouse pointer. It corresponds to the wl_seat interface in the Wayland protocol.

Member Type Documentation

enum QWaylandSeat::CapabilityFlag
flags QWaylandSeat::CapabilityFlags

This enum type describes the capabilities of a QWaylandSeat.

ConstantValueDescription
QWaylandSeat::Pointer0x01The QWaylandSeat supports pointer input.
QWaylandSeat::Keyboard0x02The QWaylandSeat supports keyboard input.
QWaylandSeat::Touch0x04The QWaylandSeat supports touch input.
QWaylandSeat::DefaultCapabilitiesPointer | Keyboard | TouchThe QWaylandSeat has the default capabilities.

The CapabilityFlags type is a typedef for QFlags<CapabilityFlag>. It stores an OR combination of CapabilityFlag values.

Property Documentation

drag : QWaylandDrag* const

This property holds the drag and drop operations and sends signals when they start and end. The property stores details like what image should be under the mouse cursor when the user drags it.

Access functions:

QWaylandDrag *drag() const

keymap : QWaylandKeymap* const

This property holds the keymap object.

A keymap provides a way to translate actual key scan codes into a meaningful value. For example, if you use a keymap with a Norwegian layout, the key to the right of the letter L produces an Ø.

Keymaps can also be used to customize key functions, such as to specify whether Control and CAPS lock should be swapped, and so on.

Access functions:

QWaylandKeymap *keymap()

Member Function Documentation

QWaylandSeat::QWaylandSeat(QWaylandCompositor *compositor, QWaylandSeat::CapabilityFlags capabilityFlags = DefaultCapabilities)

Constructs a QWaylandSeat for the given compositor and capabilityFlags.

[signal] void QWaylandSeat::cursorSurfaceRequest(QWaylandSurface *surface, int hotspotX, int hotspotY)

This signal is emitted when the client has requested for a specific surface to be the mouse cursor. For example, when the user hovers over a particular surface, and you want the cursor to change into a resize arrow.

Both hotspotX and hotspotY are offsets from the top-left of a pointer surface, where a click should happen. For example, if the requested cursor surface is an arrow, the parameters indicate where the arrow's tip is, on that surface.

[signal] void QWaylandSeat::keyboardFocusChanged(QWaylandSurface *newFocus, QWaylandSurface *oldFocus)

This signal is emitted when setKeyboardFocus() is called.

newFocus has the surface that received keyboard focus; or nullptr if no surface has focus. oldFocus has the surface that lost keyboard focus; or nullptr if no surface had focus.

[signal] void QWaylandSeat::mouseFocusChanged(QWaylandView *newFocus, QWaylandView *oldFocus)

This signal is emitted when the mouse focus has changed from oldFocus to newFocus.

[override virtual] QWaylandSeat::~QWaylandSeat()

Destroys the QWaylandSeat

QWaylandSeat::CapabilityFlags QWaylandSeat::capabilities() const

Returns the capability flags for this QWaylandSeat.

QWaylandCompositor *QWaylandSeat::compositor() const

Returns the compositor for this QWaylandSeat.

QWaylandDrag *QWaylandSeat::drag() const

Returns the drag object for this QWaylandSeat.

Note: Getter function for property drag.

[static] QWaylandSeat *QWaylandSeat::fromSeatResource(struct ::wl_resource *resource)

Returns the QWaylandSeat corresponding to the resource. The resource is expected to have the type wl_seat.

[virtual] void QWaylandSeat::initialize()

Initializes parts of the seat corresponding to the capabilities set in the constructor, or through setCapabilities().

Note: Normally, this function is called automatically after the seat and compositor have been created, so calling it manually is usually unnecessary.

bool QWaylandSeat::isInitialized() const

Returns true if the QWaylandSeat is initialized; false otherwise.

The value true indicates that it's now possible for clients to start using the seat.

QWaylandKeyboard *QWaylandSeat::keyboard() const

Returns the keyboard for this input device.

QWaylandSurface *QWaylandSeat::keyboardFocus() const

Returns the current focused surface for keyboard input.

See also setKeyboardFocus().

QWaylandKeymap *QWaylandSeat::keymap()

Returns the keymap object for this QWaylandSeat.

Note: Getter function for property keymap.

QWaylandView *QWaylandSeat::mouseFocus() const

Returns the view that currently has mouse focus.

See also setMouseFocus().

QWaylandPointer *QWaylandSeat::pointer() const

Returns the pointer device for this QWaylandSeat.

void QWaylandSeat::sendFullKeyEvent(QKeyEvent *event)

Sends the event to the keyboard device.

void QWaylandSeat::sendFullTouchEvent(QWaylandSurface *surface, QTouchEvent *event)

Sends the event to the specified surface on the touch device.

Warning: This API will automatically map QTouchEvent::TouchPoint::id to a sequential id before sending it to the client. It should therefore not be used in combination with the other API using explicit ids, as collisions might occur.

void QWaylandSeat::sendKeyEvent(int qtKey, bool pressed)

Sends a key press (if pressed is true) or release (if pressed is false) event of a key qtKey to the keyboard device.

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

This function was introduced in Qt 5.12.

void QWaylandSeat::sendKeyPressEvent(uint code)

Sends a key press event with the key code to the keyboard device.

void QWaylandSeat::sendKeyReleaseEvent(uint code)

Sends a key release event with the key code to the keyboard device.

void QWaylandSeat::sendMouseMoveEvent(QWaylandView *view, const QPointF &localPos, const QPointF &outputSpacePos = QPointF())

Sets the mouse focus to view and sends a mouse move event to the pointer device with the local position localPos and output space position outputSpacePos.

void QWaylandSeat::sendMousePressEvent(Qt::MouseButton button)

Sends a mouse press event for button to the QWaylandSeat's pointer device.

void QWaylandSeat::sendMouseReleaseEvent(Qt::MouseButton button)

Sends a mouse release event for button to the QWaylandSeat's pointer device.

void QWaylandSeat::sendMouseWheelEvent(Qt::Orientation orientation, int delta)

Sends a mouse wheel event to the QWaylandSeat's pointer device with the given orientation and delta.

void QWaylandSeat::sendTouchCancelEvent(QWaylandClient *client)

Sends a cancel event to the touch device of a client.

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

void QWaylandSeat::sendTouchFrameEvent(QWaylandClient *client)

Sends a frame event to the touch device of a client to indicate the end of a series of touch up, down, and motion events.

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

uint QWaylandSeat::sendTouchPointEvent(QWaylandSurface *surface, int id, const QPointF &point, Qt::TouchPointState state)

Sends a touch point event to the surface on a touch device with the given id, point and state.

Warning: This API should not be used in combination with forwarding of touch events using QWaylandQuickItem::touchEventsEnabled or sendFullTouchEvent, as it might lead to conflicting touch ids.

Returns the serial for the touch up or touch down event.

uint QWaylandSeat::sendTouchPointMoved(QWaylandSurface *surface, int id, const QPointF &position)

Sends a touch moved event for the touch point id on surface with position position.

Note: You need to send a touch frame event when you are done sending touch events.

Warning: This API should not be used in combination with forwarding of touch events using QWaylandQuickItem::touchEventsEnabled or sendFullTouchEvent, as it might lead to conflicting touch ids.

Returns the serial for the touch motion event.

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

uint QWaylandSeat::sendTouchPointPressed(QWaylandSurface *surface, int id, const QPointF &position)

Sends a touch pressed event for the touch point id on surface with position position.

Note: You need to send a touch frame event when you are done sending touch events.

Warning: This API should not be used in combination with forwarding of touch events using QWaylandQuickItem::touchEventsEnabled or sendFullTouchEvent, as it might lead to conflicting touch ids.

Returns the serial for the touch down event.

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

uint QWaylandSeat::sendTouchPointReleased(QWaylandSurface *surface, int id, const QPointF &position)

Sends a touch released event for the touch point id on surface with position position.

Note: You need to send a touch frame event when you are done sending touch events.

Warning: This API should not be used in combination with forwarding of touch events using QWaylandQuickItem::touchEventsEnabled or sendFullTouchEvent, as it might lead to conflicting touch ids.

Returns the serial for the touch up event.

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

bool QWaylandSeat::setKeyboardFocus(QWaylandSurface *surface)

Sets the current keyboard focus to surface. Returns a boolean indicating if the operation was successful.

See also keyboardFocus().

void QWaylandSeat::setMouseFocus(QWaylandView *view)

Sets the current mouse focus to view.

See also mouseFocus().

QWaylandTouch *QWaylandSeat::touch() const

Returns the touch device for this QWaylandSeat.

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