Use QElapsedTimer for data engines

forward port of http://commits.kde.org/kdelibs/ac5d3d2f916c0a461121d4d033642227bd743edb

CCBUG: 336551
REVIEW: 118869

src/plasma/datacontainer.cpp

@@ -53,7 +53,7 @@ void DataContainer::setData(const QString &key, const QVariant &value)
     }
 
     d->dirty = true;
-    d->updateTs.start();
+    d->updateTimer.start();
 
     //check if storage is enabled and if storage is needed.
     //If it is not set to be stored,then this is the first
@@ -95,7 +95,7 @@ void DataContainer::removeAllData()
 
     d->data.clear();
     d->dirty = true;
-    d->updateTs.start();
+    d->updateTimer.start();
 }
 
 bool DataContainer::visualizationIsConnected(QObject *visualization) const
@@ -354,9 +354,7 @@ void DataContainer::forceImmediateUpdate()
 
 uint DataContainer::timeSinceLastUpdate() const
 {
-    //FIXME: we still assume it's been <24h
+    return d->updateTimer.elapsed();
-    //and ignore possible daylight savings changes
-    return d->updateTs.elapsed();
 }
 
 void DataContainer::setNeedsUpdate(bool update)

src/plasma/dataengine.cpp

@@ -352,12 +352,12 @@ void DataEngine::timerEvent(QTimerEvent *event)
         }
 
         // minPollingInterval
-        if (d->updateTimestamp.elapsed() < d->minPollingInterval) {
+        if (d->updateTimer.elapsed() < d->minPollingInterval) {
             //qDebug() << "hey now.. slow down!";
             return;
         }
 
-        d->updateTimestamp.restart();
+        d->updateTimer.start();
         updateAllSources();
     } else if (event->timerId() == d->checkSourcesTimerId) {
         killTimer(d->checkSourcesTimerId);
@@ -421,7 +421,7 @@ DataEnginePrivate::DataEnginePrivate(DataEngine *e, const KPluginInfo &info, con
       script(0),
       package(0)
 {
-    updateTimestamp.start();
+    updateTimer.start();
 
     if (dataEngineDescription.isValid()) {
         e->setObjectName(dataEngineDescription.name());

src/plasma/private/datacontainer_p.h

@@ -24,7 +24,7 @@
 #include "storage_p.h"
 
 #include <QtCore/QTimerEvent>
-#include <QtCore/QTime>
+#include <QtCore/QElapsedTimer>
 #include <QtCore/QBasicTimer>
 
 #include <QAbstractItemModel>
@@ -85,7 +85,7 @@ public:
     DataEngine::Data data;
     QMap<QObject *, SignalRelay *> relayObjects;
     QMap<uint, SignalRelay *> relays;
-    QTime updateTs;
+    QElapsedTimer updateTimer;
     Storage *storage;
     QBasicTimer storageTimer;
     QBasicTimer checkUsageTimer;

src/plasma/private/dataengine_p.h

@@ -20,12 +20,10 @@
 #ifndef DATAENGINE_P_H
 #define DATAENGINE_P_H
 
-#include <QTime>
+#include <QElapsedTimer>
 
 #include <kplugininfo.h>
 
-class QTime;
-
 namespace Plasma
 {
 
@@ -97,7 +95,7 @@ public:
     int checkSourcesTimerId;
     int updateTimerId;
     int minPollingInterval;
-    QTime updateTimestamp;
+    QElapsedTimer updateTimer;
     DataEngine::SourceDict sources;
     bool valid;
     DataEngineScript *script;