Doc: Modernize backend example and adapt C++ integration docs

We want people to use the static type registration.

Change-Id: I98e51af9df1a2f73df10f82458a7b7f5c5e5aad1
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

3 files changed, 19 insertions, 4 deletions

diff --git a/src/qml/doc/snippets/code/backend/backend.h b/src/qml/doc/snippets/code/backend/backend.h
index fa7ce9eb86..6c64236bc7 100644
--- a/src/qml/doc/snippets/code/backend/backend.h
+++ b/src/qml/doc/snippets/code/backend/backend.h
@@ -53,11 +53,13 @@
 
 #include <QObject>
 #include <QString>
+#include <qqml.h>
 
 class BackEnd : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(QString userName READ userName WRITE setUserName NOTIFY userNameChanged)
+    QML_ELEMENT
 
 public:
     explicit BackEnd(QObject *parent = nullptr);
diff --git a/src/qml/doc/snippets/code/backend/backend.pro b/src/qml/doc/snippets/code/backend/backend.pro
new file mode 100644
index 0000000000..8bd2422718
--- /dev/null
+++ b/src/qml/doc/snippets/code/backend/backend.pro
@@ -0,0 +1,17 @@
+QT += qml
+
+#![registration]
+CONFIG += qmltypes
+QML_IMPORT_NAME = io.qt.examples.backend
+QML_IMPORT_MAJOR_VERSION = 1
+#![registration]
+
+HEADERS += \
+    backend.h
+
+SOURCES += \
+    backend.cpp \
+    main.cpp
+
+RESOURCES += \
+    main.qml
diff --git a/src/qml/doc/snippets/code/backend/main.cpp b/src/qml/doc/snippets/code/backend/main.cpp
index 91a012dfda..52fcb38621 100644
--- a/src/qml/doc/snippets/code/backend/main.cpp
+++ b/src/qml/doc/snippets/code/backend/main.cpp
@@ -51,14 +51,10 @@
 #include <QGuiApplication>
 #include <QQmlApplicationEngine>
 
-#include "backend.h"
-
 int main(int argc, char *argv[])
 {
     QGuiApplication app(argc, argv);
 
-    qmlRegisterType<BackEnd>("io.qt.examples.backend", 1, 0, "BackEnd");
-
     QQmlApplicationEngine engine;
     engine.load(QUrl(QStringLiteral("qrc:/main.qml")));