Examples: Return on QML load error.

Prevents hanging processes should an error while loading
QML occur.

Change-Id: I35f68ef170755f075fe95e2e535e363a49c598ee
Reviewed-by: Jarek Kobus <jaroslaw.kobus@theqtcompany.com>

6 files changed, 14 insertions, 0 deletions

diff --git a/examples/scxml/invoke-dynamic/invoke-dynamic.cpp b/examples/scxml/invoke-dynamic/invoke-dynamic.cpp
index 958128d..4d48e16 100644
--- a/examples/scxml/invoke-dynamic/invoke-dynamic.cpp
+++ b/examples/scxml/invoke-dynamic/invoke-dynamic.cpp
@@ -58,6 +58,8 @@ int main(int argc, char *argv[])
 
     QQmlApplicationEngine engine;
     engine.load(QUrl(QStringLiteral("qrc:/invoke-dynamic.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
 
     return app.exec();
 }
diff --git a/examples/scxml/invoke-static/invoke-static.cpp b/examples/scxml/invoke-static/invoke-static.cpp
index c6d0655..c955ebe 100644
--- a/examples/scxml/invoke-static/invoke-static.cpp
+++ b/examples/scxml/invoke-static/invoke-static.cpp
@@ -63,6 +63,9 @@ int main(int argc, char *argv[])
     QQmlApplicationEngine engine;
     engine.rootContext()->setContextProperty(QStringLiteral("directions"), &stateMachine);
     engine.load(QUrl(QStringLiteral("qrc:/invoke-static.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
+
     stateMachine.start();
 
     return app.exec();
diff --git a/examples/scxml/mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.cpp b/examples/scxml/mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.cpp
index 51f5738..dce11c7 100644
--- a/examples/scxml/mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.cpp
+++ b/examples/scxml/mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.cpp
@@ -58,6 +58,8 @@ int main(int argc, char *argv[])
 
     QQmlApplicationEngine engine;
     engine.load(QUrl(QStringLiteral("qrc:///mediaplayer-qml-dynamic.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
 
     return app.exec();
 }
diff --git a/examples/scxml/mediaplayer-qml-static/mediaplayer-qml-static.cpp b/examples/scxml/mediaplayer-qml-static/mediaplayer-qml-static.cpp
index c6d9d3a..9aa1ea3 100644
--- a/examples/scxml/mediaplayer-qml-static/mediaplayer-qml-static.cpp
+++ b/examples/scxml/mediaplayer-qml-static/mediaplayer-qml-static.cpp
@@ -65,6 +65,8 @@ int main(int argc, char *argv[])
     QQmlApplicationEngine engine;
     engine.rootContext()->setContextProperty(QStringLiteral("mediaPlayerStateMachine"), &stateMachine);
     engine.load(QUrl(QStringLiteral("qrc:///mediaplayer-qml-static.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
 
     return app.exec();
 }
diff --git a/examples/scxml/trafficlight-qml-dynamic/trafficlight-qml-dynamic.cpp b/examples/scxml/trafficlight-qml-dynamic/trafficlight-qml-dynamic.cpp
index d12db7b..b862386 100644
--- a/examples/scxml/trafficlight-qml-dynamic/trafficlight-qml-dynamic.cpp
+++ b/examples/scxml/trafficlight-qml-dynamic/trafficlight-qml-dynamic.cpp
@@ -58,6 +58,8 @@ int main(int argc, char *argv[])
 
     QQmlApplicationEngine engine;
     engine.load(QUrl(QStringLiteral("qrc:///trafficlight-qml-dynamic.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
 
     return app.exec();
 }
diff --git a/examples/scxml/trafficlight-qml-static/trafficlight-qml-static.cpp b/examples/scxml/trafficlight-qml-static/trafficlight-qml-static.cpp
index 2e671f3..f675a68 100644
--- a/examples/scxml/trafficlight-qml-static/trafficlight-qml-static.cpp
+++ b/examples/scxml/trafficlight-qml-static/trafficlight-qml-static.cpp
@@ -63,6 +63,9 @@ int main(int argc, char *argv[])
     QQmlApplicationEngine engine;
     engine.rootContext()->setContextProperty(QStringLiteral("trafficLightStateMachine"), &stateMachine);
     engine.load(QUrl(QStringLiteral("qrc:/trafficlight-qml-static.qml")));
+    if (engine.rootObjects().isEmpty())
+        return -1;
+
     stateMachine.start();
 
     return app.exec();