QPointingDeviceUniqueId Class▲
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Header: QPointingDeviceUniqueId
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CMake:
find_package(Qt6 REQUIRED COMPONENTS Gui)
target_link_libraries(mytarget PRIVATE Qt6::Gui)
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qmake: QT += gui
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Inherited By:
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Instantiated By: qml-qtquick-pointingdeviceuniqueid.xml
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Group: QPointingDeviceUniqueId is part of events
Detailed Description▲
QPointingDeviceUniqueIds can be compared for equality, and can be used as keys in a QHash. You get access to the numerical ID via numericId(), if the device supports such IDs. For future extensions, though, you should not use that function, but compare objects of this type using the equality operator.
This class is a thin wrapper around an integer ID. You pass it into and out of functions by value.
See Also▲
See also QEventPoint
Property Documentation▲
[read-only] numericId : const qint64▲
This property holds the numeric unique ID of the token represented by a touchpoint
If the device provides a numeric ID, isValid() returns true, and this property provides the numeric ID; otherwise it is -1.
You should not use the value of this property in portable code, but instead rely on equality to identify pointers.
Access functions:
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numericId() const
See Also▲
See also isValid()
Member Function Documentation▲
QPointingDeviceUniqueId::QPointingDeviceUniqueId()▲
Constructs an invalid unique pointer ID.
[static] QPointingDeviceUniqueId QPointingDeviceUniqueId::fromNumericId(qint64 id)▲
Constructs a unique pointer ID from numeric ID id.
bool QPointingDeviceUniqueId::isValid() const▲
Returns whether this unique pointer ID is valid, that is, it represents an actual pointer.
Related Non-Members▲
size_t qHash(QPointingDeviceUniqueId key, size_t seed = 0)▲
Returns the hash value for key, using seed to seed the calculation.
bool operator!=(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)▲
Returns whether the two unique pointer IDs lhs and rhs identify different pointers (true) or not (false).
bool operator==(QPointingDeviceUniqueId lhs, QPointingDeviceUniqueId rhs)▲
Returns whether the two unique pointer IDs lhs and rhs identify the same pointer (true) or not (false).