QmlProfiler: Delete debug connection on error or if params change

Now that we don't recreate the debug connection anymore when (re)trying
to connect, we have to do it explicitly when changing the connection
parameters or when a connection attempt fails and we need to cancel the
"Connecting" state.

Change-Id: Ib2b6b4fb1e39e64fe3c9f2bf90b6e43043d05a9e
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

src/plugins/qmlprofiler/qmlprofilerclientmanager.cpp

@@ -105,6 +105,7 @@ void QmlProfilerClientManager::setTcpConnection(QString host, quint64 port)
 {
     d->tcpHost = host;
     d->tcpPort = port;
+    disconnectClient();
 }
 
 void QmlProfilerClientManager::clearBufferedData()
@@ -135,6 +136,8 @@ void QmlProfilerClientManager::connectClient(quint16 port)
     connect(d->connection, SIGNAL(errorMessage(QString)), this, SLOT(logState(QString)));
     connect(d->connection, SIGNAL(opened()), this, SLOT(qmlDebugConnectionOpened()));
     connect(d->connection, SIGNAL(closed()), this, SLOT(qmlDebugConnectionClosed()));
+    connect(d->connection, &QmlDebugConnection::error,
+            this, &QmlProfilerClientManager::qmlDebugConnectionError);
     d->connectionTimer.start();
     d->tcpPort = port;
 }
@@ -276,6 +279,17 @@ void QmlProfilerClientManager::qmlDebugConnectionClosed()
     emit connectionClosed();
 }
 
+void QmlProfilerClientManager::qmlDebugConnectionError(QDebugSupport::Error error)
+{
+    logState(tr("Debug connection error %1").arg(error));
+    if (d->connection->isOpen()) {
+        disconnectClient();
+        emit connectionClosed();
+    } else {
+        disconnectClient();
+    }
+}
+
 void QmlProfilerClientManager::logState(const QString &msg)
 {
     QString state = QLatin1String("QML Profiler: ") + msg;

src/plugins/qmlprofiler/qmlprofilerclientmanager.h

@@ -33,6 +33,7 @@
 
 #include "qmlprofilerstatemanager.h"
 #include <qmldebug/qmlprofilereventlocation.h>
+#include <qmldebug/qmldebugclient.h>
 
 #include <QObject>
 #include <QStringList>
@@ -71,6 +72,7 @@ private slots:
     void tryToConnect();
     void qmlDebugConnectionOpened();
     void qmlDebugConnectionClosed();
+    void qmlDebugConnectionError(QDebugSupport::Error error);
     void logState(const QString &);
 
     void retryMessageBoxFinished(int result);