Soprano  2.8.0
Public Slots | Public Member Functions | Protected Member Functions
Soprano::Util::SignalCacheModel Class Reference

Caches multiple signals into one to avoid slowdown when adding or removing many statements. More...

#include <Soprano/Util/SignalCacheModel>

+ Inheritance diagram for Soprano::Util::SignalCacheModel:

List of all members.

Public Slots

void setCacheTime (int msec)

Public Member Functions

 SignalCacheModel (Model *parent=0)
virtual ~SignalCacheModel ()
int cacheTime () const

Protected Member Functions

virtual void parentStatementsAdded ()
virtual void parentStatementsRemoved ()
void timerEvent (QTimerEvent *event)

Detailed Description

Caches multiple signals into one to avoid slowdown when adding or removing many statements.

When adding or removing many statements with separate calls to Model::addStatement or Model::removeStatement Model emits signals Model::statementsAdded and Model::statementsRemoved over and over for each call. This can slow down an application that monitors the state of the model.

The SignalCacheModel caches multiple emitted signals into one, trying to ensure that only one signal is delivered in a certain time. The downside of this is that signals are not delivered immiadetely but through the event loop. This, however, should seldomly be a problem.

Author:
Sebastian Trueg trueg.nosp@m.@kde.nosp@m..org
Since:
2.1

Definition at line 52 of file signalcachemodel.h.


Constructor & Destructor Documentation

Create a new SignalCacheModel.

Parameters:
parentThe parent Model to forward the actual calls to.

Destructor.


Member Function Documentation

The cache time.

See also:
setCacheTime

Signals are only delivered once every msec milliseconds.

Default value is 50

virtual void Soprano::Util::SignalCacheModel::parentStatementsAdded ( ) [protected, virtual]

Reimplemented to do the actual signal caching.

Reimplemented from Soprano::FilterModel.

virtual void Soprano::Util::SignalCacheModel::parentStatementsRemoved ( ) [protected, virtual]

Reimplemented to do the actual signal caching.

Reimplemented from Soprano::FilterModel.

Reimplemented from QObject.


The documentation for this class was generated from the following file: