• Home
• Plasma
• DataEngine

C# Class Plasma.DataEngine

ファイルを表示 Open project: 0xd34df00d/Qross

Private Properties

Property	Type	Description
ForceImmediateUpdateOfAllVisualizations	void
Init	void
RemoveSource	void
ScheduleSourcesUpdated	void
ServiceForSource	Service
SourceRequestEvent	bool
TimerEvent	void
UpdateAllSources	void
UpdateSourceEvent	bool
sources	List

Public Methods

Method	Description
ConnectAllSources ( QObject visualization ) : void
ConnectAllSources ( QObject visualization, uint pollingInterval ) : void
ConnectAllSources ( QObject visualization, uint pollingInterval, Plasma intervalAlignment ) : void	Connects all currently existing sources to an object for data updates. The object must have a slot with the following signature: SLOT("dataUpdated(string,Plasma.DataEngine.Data)") The data is a QHash of QVariants keyed by string names, allowing one data source to provide sets of related data. This method may be called multiple times for the same visualization without side-effects. This can be useful to change the pollingInterval. Note that this method does not automatically connect sources that may appear later on. Connecting and responding to the sourceAdded sigal is still required to achieve that. name="visualization" the object to connect the data source to name="pollingInterval" the frequency, in milliseconds, with which to check for updates; a value of 0 (the default) means to update only when there is new data spontaneously generated (e.g. by the engine); any other value results in periodic updates from this source. This value is per-visualization and can be handy for items that require constant updates such as scrolling graphs or clocks. If the data has not changed, no update will be sent. name="intervalAlignment" the number of ms to align the interval to
ConnectSource ( string source, QObject visualization ) : void
ConnectSource ( string source, QObject visualization, uint pollingInterval ) : void
ConnectSource ( string source, QObject visualization, uint pollingInterval, Plasma intervalAlignment ) : void	Connects a source to an object for data updates. The object must have a slot with the following signature: dataUpdated(stringsourceName, const Plasma.DataEngine.Data &data) The data is a QHash of QVariants keyed by string names, allowing one data source to provide sets of related data. name="source" the name of the data source name="visualization" the object to connect the data source to name="pollingInterval" the frequency, in milliseconds, with which to check for updates; a value of 0 (the default) means to update only when there is new data spontaneously generated (e.g. by the engine); any other value results in periodic updates from this source. This value is per-visualization and can be handy for items that require constant updates such as scrolling graphs or clocks. If the data has not changed, no update will be sent. name="intervalAlignment" the number of ms to align the interval to
ContainerForSource ( string source ) : DataContainer	Retrevies a pointer to the DataContainer for a given source. This method should not be used if possible. An exception is for script engines that can not provide a QMetaObject as required by connectSource for the initial call to dataUpdated. Using this method, such engines can provide their own connectSource API. name="source" the name of the source.
DataEngine ( ) : System
DataEngine ( QObject parent ) : System
DataEngine ( QObject parent, Kimono.KService service ) : System	Constructor. name="parent" The parent object. name="service" pointer to the service that describes the engine
DataEngine ( QObject parent, List args ) : System
DisconnectSource ( string source, QObject visualization ) : void	Disconnects a source to an object that was receiving data updates. name="source" the name of the data source name="visualization" the object to connect the data source to
Dispose ( ) : void
IsEmpty ( ) : bool	Returns true if the data engine is empty, which is to say that it has no data sources currently.
MaxSourceCount ( ) : uint	Returns the maximum number of sources this DataEngine will have at any given time.
Name ( ) : string	Returns the engine name for the DataEngine
Package ( ) : Package	Accessor for the associated Package object if any.
PluginName ( ) : string	Returns the plugin name for the applet
Query ( string source ) : QVariant>.Dictionary	Gets the Data associated with a data source. The data is a QHash of QVariants keyed by string names, allowing one data source to provide sets of related data. name="source" the data source to retrieve the data for

Protected Methods

Method	Description
AddSource ( Plasma source ) : void	Adds an already constructed data source. The DataEngine takes ownership of the DataContainer object. The objectName of the source is used for the source name. name="source" the DataContainer to add to the DataEngine
ContainerDict ( ) : Plasma.DataContainer>.Dictionary
CreateProxy ( ) : void
DataEngine ( Type dummy ) : System
MinimumPollingInterval ( ) : int
RemoveAllData ( string source ) : void	Removes all the data associated with a data source. name="source" the name of the data source
RemoveAllSources ( ) : void	Removes all data sources
RemoveData ( string source, string key ) : void	Removes a data entry from a source name="source" the name of the data source name="key" the data entry to remove
SetData ( string source, QVariant>.Dictionary data ) : void	Adds a set of data to a data source. If the source doesn't exist then it is created. name="source" the name of the data source name="data" the data to add to the source
SetData ( string source, Qyoto.QVariant value ) : void	Sets a value for a data source. If the source doesn't exist then it is created. name="source" the name of the data source name="value" the data to associated with the source
SetData ( string source, string key, Qyoto.QVariant value ) : void	Sets a value for a data source. If the source doesn't exist then it is created. name="source" the name of the data source name="key" the key to use for the data name="value" the data to associated with the source
SetMaxSourceCount ( uint limit ) : void	Sets an upper limit on the number of data sources to keep in this engine. If the limit is exceeded, then the oldest data source, as defined by last update, is dropped. name="limit" the maximum number of sources to keep active
SetMinimumPollingInterval ( int minimumMs ) : void	Sets the minimum amount of time, in milliseconds, that must pass between successive updates of data. This can help prevent too many updates happening due to multiple update requests coming in, which can be useful for expensive (time- or resource-wise) update mechanisms. name="minimumMs" the minimum time lapse, in milliseconds, between updates. A value less than 0 means to never perform automatic updates, a value of 0 means update immediately on every update request, a value >0 will result in a minimum time lapse being enforced.
SetName ( string name ) : void	Sets the engine name for the DataEngine
SetPollingInterval ( uint frequency ) : void	Sets up an internal update tick for all data sources. On every update, updateSourceEvent will be called for each applicable source. name="frequency" the time, in milliseconds, between updates. A value of 0 will stop internally triggered updates.

Private Methods

Method	Description
ForceImmediateUpdateOfAllVisualizations ( ) : void
Init ( ) : void
RemoveSource ( string source ) : void
ScheduleSourcesUpdated ( ) : void
ServiceForSource ( string source ) : Service
SourceRequestEvent ( string source ) : bool
TimerEvent ( Qyoto.QTimerEvent arg1 ) : void
UpdateAllSources ( ) : void
UpdateSourceEvent ( string source ) : bool
sources ( ) : List

Method Details