Bluetooth heartrate-server: Handle errors

Make it a console application and terminate on errors, printing a
message.

This prevents it from silently hanging, locking up the libraries, on
Windows.

Change-Id: Ie7d022a2b193cf2c320cb918d35ce2ad52b2ac48
Reviewed-by: Juha Vuolle <juha.vuolle@insta.fi>
(cherry picked from commit 58acbdf11e5e493c2d2d1c70c0b90d4dda34aa07)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

3 files changed, 18 insertions, 3 deletions

diff --git a/examples/bluetooth/heartrate-server/CMakeLists.txt b/examples/bluetooth/heartrate-server/CMakeLists.txt
index 4f0c68de..e2038421 100644
--- a/examples/bluetooth/heartrate-server/CMakeLists.txt
+++ b/examples/bluetooth/heartrate-server/CMakeLists.txt
@@ -20,7 +20,6 @@ qt_add_executable(heartrate-server
 )
 
 set_target_properties(heartrate-server PROPERTIES
-    WIN32_EXECUTABLE TRUE
     MACOSX_BUNDLE TRUE
 )
 
diff --git a/examples/bluetooth/heartrate-server/heartrate-server.pro b/examples/bluetooth/heartrate-server/heartrate-server.pro
index 8ec3f703..56415a07 100644
--- a/examples/bluetooth/heartrate-server/heartrate-server.pro
+++ b/examples/bluetooth/heartrate-server/heartrate-server.pro
@@ -3,7 +3,7 @@ TARGET = heartrate-server
 
 QT = core bluetooth
 android: QT += gui
-CONFIG += c++11
+CONFIG += c++11 console
 
 SOURCES += main.cpp
 
diff --git a/examples/bluetooth/heartrate-server/main.cpp b/examples/bluetooth/heartrate-server/main.cpp
index 286125e5..2596f589 100644
--- a/examples/bluetooth/heartrate-server/main.cpp
+++ b/examples/bluetooth/heartrate-server/main.cpp
@@ -100,10 +100,25 @@ int main(int argc, char *argv[])
     //! [Service Data]
 
     //! [Start Advertising]
+    bool errorOccurred = false;
     const QScopedPointer<QLowEnergyController> leController(QLowEnergyController::createPeripheral());
+    auto errorHandler = [&leController,&errorOccurred](QLowEnergyController::Error errorCode)
+    {
+            qWarning().noquote().nospace() << errorCode << " occurred: "
+                << leController->errorString();
+            if (errorCode != QLowEnergyController::RemoteHostClosedError) {
+                qWarning("Heartrate-server quitting due to the error.");
+                errorOccurred = true;
+                QCoreApplication::quit();
+            }
+    };
+    QObject::connect(leController.data(), &QLowEnergyController::errorOccurred, errorHandler);
+
     QScopedPointer<QLowEnergyService> service(leController->addService(serviceData));
     leController->startAdvertising(QLowEnergyAdvertisingParameters(), advertisingData,
                                    advertisingData);
+    if (errorOccurred)
+        return -1;
     //! [Start Advertising]
 
     //! [Provide Heartbeat]
@@ -140,5 +155,6 @@ int main(int argc, char *argv[])
     };
     QObject::connect(leController.data(), &QLowEnergyController::disconnected, reconnect);
 
-    return app.exec();
+    const int retval = QCoreApplication::exec();
+    return errorOccurred ? -1 : retval;
 }