Use new connect api

dataengines/dict/dictengine.cpp

@@ -116,7 +116,7 @@ void DictEngine::getDefinition()
         ret += m_tcpSocket->readAll();
     }
 
-    connect(m_tcpSocket, SIGNAL(disconnected()), this, SLOT(socketClosed()));
+    connect(m_tcpSocket, &QTcpSocket::disconnected, this, &DictEngine::socketClosed);
     m_tcpSocket->disconnectFromHost();
     //       setData(m_currentWord, m_dictName, ret);
     //       qWarning()<<ret;
@@ -222,12 +222,12 @@ bool DictEngine::sourceRequestEvent(const QString &query)
         setData(m_currentWord, m_dictName, QString());
         m_tcpSocket = new QTcpSocket(this);
         m_tcpSocket->abort();
-        connect(m_tcpSocket, SIGNAL(disconnected()), this, SLOT(socketClosed()));
+        connect(m_tcpSocket, &QTcpSocket::disconnected, this, &DictEngine::socketClosed);
 
         if (m_currentWord == "list-dictionaries") {
-            connect(m_tcpSocket, SIGNAL(readyRead()), this, SLOT(getDicts()));
+            connect(m_tcpSocket, &QTcpSocket::readyRead, this, &DictEngine::getDicts);
         } else {
-            connect(m_tcpSocket, SIGNAL(readyRead()), this, SLOT(getDefinition()));
+            connect(m_tcpSocket, &QTcpSocket::readyRead, this, &DictEngine::getDefinition);
         }
 
         m_tcpSocket->connectToHost(m_serverName, 2628);

dataengines/filebrowser/filebrowserengine.cpp

@@ -36,12 +36,9 @@ FileBrowserEngine::FileBrowserEngine(QObject* parent, const QVariantList& args)
     Q_UNUSED(args)
 
     m_dirWatch = new KDirWatch(this);
-    connect(m_dirWatch, SIGNAL(created(
-        const QString &)), this, SLOT(dirCreated(QString)));
-    connect(m_dirWatch, SIGNAL(deleted(
-        const QString &)), this, SLOT(dirDeleted(QString)));
-    connect(m_dirWatch, SIGNAL(dirty(
-        const QString &)), this, SLOT(dirDirty(QString)));
+    connect(m_dirWatch, &KDirWatch::created, this, &FileBrowserEngine::dirCreated);
+    connect(m_dirWatch, &KDirWatch::deleted, this, &FileBrowserEngine::dirDeleted);
+    connect(m_dirWatch, &KDirWatch::dirty, this, &FileBrowserEngine::dirDirty);
 }
 
 FileBrowserEngine::~FileBrowserEngine()

dataengines/keystate/keystate.cpp

@@ -71,13 +71,12 @@ void KeyStatesEngine::init()
         setData(it2.value(), data);
     }
 
-    connect(&m_keyInfo, SIGNAL(keyPressed(Qt::Key,bool)), this, SLOT(keyPressed(Qt::Key,bool)));
-    connect(&m_keyInfo, SIGNAL(keyLatched(Qt::Key,bool)), this, SLOT(keyLatched(Qt::Key,bool)));
-    connect(&m_keyInfo, SIGNAL(keyLocked(Qt::Key,bool)), this, SLOT(keyLocked(Qt::Key,bool)));
-    connect(&m_keyInfo, SIGNAL(buttonPressed(Qt::MouseButton,bool)),
-            this, SLOT(mouseButtonPressed(Qt::MouseButton,bool)));
-    connect(&m_keyInfo, SIGNAL(keyAdded(Qt::Key)), this, SLOT(keyAdded(Qt::Key)));
-    connect(&m_keyInfo, SIGNAL(keyRemoved(Qt::Key)), this, SLOT(keyRemoved(Qt::Key)));
+    connect(&m_keyInfo, &KModifierKeyInfo::keyPressed, this, &KeyStatesEngine::keyPressed);
+    connect(&m_keyInfo, &KModifierKeyInfo::keyLatched, this, &KeyStatesEngine::keyLatched);
+    connect(&m_keyInfo, &KModifierKeyInfo::keyLocked, this, &KeyStatesEngine::keyLocked);
+    connect(&m_keyInfo, &KModifierKeyInfo::buttonPressed, this, &KeyStatesEngine::mouseButtonPressed);
+    connect(&m_keyInfo, &KModifierKeyInfo::keyAdded, this, &KeyStatesEngine::keyAdded);
+    connect(&m_keyInfo, &KModifierKeyInfo::keyRemoved, this, &KeyStatesEngine::keyRemoved);
 }
 
 Plasma::Service *KeyStatesEngine::serviceForSource(const QString &source)