plasma-framework/scripting/dataenginescript.h

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/*
* Copyright 2007 by Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PLASMA_DATAENGINESCRIPT_H
#define PLASMA_DATAENGINESCRIPT_H
#include <kgenericfactory.h>
#include <kplugininfo.h>
#include <plasma/plasma_export.h>
#include <plasma/dataengine.h>
#include <plasma/scripting/scriptengine.h>
namespace Plasma
{
class DataEngineScriptPrivate;
class Service;
/**
* @class DataEngineScript plasma/scripting/dataenginescript.h <Plasma/Scripting/DataEngineScript>
*
* @short Provides a restricted interface for scripting a DataEngine
*/
class PLASMA_EXPORT DataEngineScript : public ScriptEngine
{
Q_OBJECT
public:
/**
* Default constructor for a DataEngineScript.
* Subclasses should not attempt to access the Plasma::DataEngine
* associated with this DataEngineScript in the constructor. All
* such set up that requires the DataEngine itself should be done
* in the init() method.
*/
explicit DataEngineScript(QObject *parent = 0);
~DataEngineScript();
/**
* Sets the Plasma::DataEngine associated with this DataEngineScript
*/
void setDataEngine(DataEngine *dataEngine);
/**
* Returns the Plasma::DataEngine associated with this script component
*/
DataEngine *dataEngine() const;
/**
* @return a list of all the data sources available via this DataEngine
* Whether these sources are currently available (which is what
* the default implementation provides) or not is up to the
* DataEngine to decide. By default, this returns dataEngine()->sources()
*/
virtual QStringList sources() const;
/**
* Called when the script should create a source that does not currently
* exist.
*
* @param name the name of the source that should be created
* @return true if a DataContainer was set up, false otherwise
*/
virtual bool sourceRequestEvent(const QString &name);
/**
* Called when the script should refresh the data contained in a given
* source.
*
* @param source the name of the source that should be updated
* @return true if the data was changed, or false if there was no
* change or if the change will occur later
**/
virtual bool updateSourceEvent(const QString &source);
/**
* @param source the source to targe the Service at
* @return a Service that has the source as a destination. The service
* is parented to the DataEngine, but may be deleted by the
* caller when finished with it
*/
virtual Service *serviceForSource(const QString &source);
protected:
/**
* @return absolute path to the main script file for this plasmoid
*/
QString mainScript() const;
/**
* @return the Package associated with this plasmoid which can
* be used to request resources, such as images and
* interface files.
*/
const Package *package() const;
/**
* @return the KPluginInfo associated with this plasmoid
*/
KPluginInfo description() const;
void setData(const QString &source, const QString &key,
const QVariant &value);
void setData(const QString &source, const QVariant &value);
/**
* Adds a set of values to a source
* @param source the name of the source to set the data on
* @values a key/value collection to add to the source
* @since 4.5
*/
void setData(const QString &source, const DataEngine::Data &values);
void removeAllData(const QString &source);
void removeData(const QString &source, const QString &key);
void setMaxSourceCount(uint limit);
void setMinimumPollingInterval(int minimumMs);
int minimumPollingInterval() const;
void setPollingInterval(uint frequency);
void removeAllSources();
void addSource(DataContainer *source);
DataEngine::SourceDict containerDict() const;
void setName(const QString &name);
void setIcon(const QString &icon);
void scheduleSourcesUpdated();
void removeSource(const QString &source);
void updateAllSources();
void forceImmediateUpdateOfAllVisualizations();
private:
DataEngineScriptPrivate *const d;
};
#define K_EXPORT_PLASMA_DATAENGINESCRIPTENGINE(libname, classname) \
K_PLUGIN_FACTORY(factory, registerPlugin<classname>();) \
K_EXPORT_PLUGIN(factory("plasma_dataenginescriptengine_" #libname))
} //Plasma namespace
#endif