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QValueSpace NamespaceThe QValueSpace namespace contains miscellaneous identifiers used throughtout the Publish and Subscribe API. More... #include <QValueSpace>Types
Macros
Detailed DescriptionThe QValueSpace namespace contains miscellaneous identifiers used throughtout the Publish and Subscribe API. Type Documentation
flags QValueSpace::LayerOptions |
| Constant | Value | Description |
|---|---|---|
| QValueSpace::UnspecifiedLayer | 0x0000 | Used as a filter to specify that any layer should be used. |
| QValueSpace::PermanentLayer | 0x0001 | Indicates that the layer uses a permanent backing store. When used as a filter only layers that use a permanent backing store will be used. Values stored in a layer with this option will persist with in the layer after the QValueSpacePublisher that published them is destroyed. This option and the TransientLayer option are mutually exclusive. |
| QValueSpace::TransientLayer | 0x0002 | Indicates that the layer does not use a permanent backing store. When used as a filter only layers that do not use permanent backing stores will be used. Values stored in a layer with this option will be removed when the QValueSpacePublisher that published them is destroyed. This option and the PermanentLayer option are mutually exclusive. |
| QValueSpace::WritableLayer | 0x0004 | Indicates that the layer can update its contents. When used as a filter only layers that are writable will be used. Applications can use QValueSpacePublisher to publish values to layers that have this option. This option and the ReadOnlyLayer option are mutually exclusive. |
| QValueSpace::ReadOnlyLayer | 0x0008 | Indicates that the layer cannot update its contents. When used as a filter only layers that are read-only will be used. Applications can not publish values to layers with this option. This option and the WritableLayer option are mutually exclusive. |
The LayerOptions type is a typedef for QFlags<LayerOption>. It stores an OR combination of LayerOption values.
Macro Documentation
QVALUESPACE_GCONF_LAYER
The UUID of the GConf layer as a QUuid. The actual UUID value is {0e2e5da0-0044-11df-941c-0002a5d5c51b}.
This value can be passed to the constructor of QValueSpacePublisher or QValueSpaceSubscriber to force the constructed object to only access the GConf layer.
You can test if the GConf layer is available by checking if the list returned by QValueSpace::availableLayers() contains this value. The GConf layer is only available on Linux platforms.
QVALUESPACE_JSONDB_LAYER
The UUID of the JsonDb layer as a QUuid. The actual UUID value is {a167384c-6acf-2738-c8d5-a088ac6ec2d6}.
This value can be passed to the constructor of QValueSpacePublisher or QValueSpaceSubscriber to force the constructed object to only access the JsonDb layer.
You can test if the JsonDb layer is available by checking if the list returned by QValueSpace::availableLayers() contains this value. The JsonDb layer is only available on Linux platforms.
QVALUESPACE_NONVOLATILEREGISTRY_LAYER
The UUID of the Non-Volatile Registry layer as a QUuid. The actual UUID value is {8e29561c-a0f0-4e89-ba56-080664abc017}.
This value can be passed to the constructor of QValueSpacePublisher or QValueSpaceSubscriber to force the constructed object to only access the Non-Volatile Registry layer.
You can test if the Non-Volatile Registry layer is available by checking if the list returned by QValueSpace::availableLayers() contains this value. The Non-Volatile Registry layer is only available on Windows platforms.
QVALUESPACE_VOLATILEREGISTRY_LAYER
The UUID of the Volatile Registry layer as a QUuid. The actual UUID value is {8ceb5811-4968-470f-8fc2-264767e0bbd9}.
This value can be passed to the constructor of QValueSpacePublisher or QValueSpaceSubscriber to force the constructed object to only access the Volatile Registry layer.
You can test if the Volatile Registry layer is available by checking if the list returned by QValueSpace::availableLayers() contains this value. The Volatile Registry layer is only available on Windows platforms.