Add QMLPlugin class for registring as a qml plugin

src/QZXing.pri

@@ -282,13 +282,24 @@ qzxing_qml {
     greaterThan(QT_VERSION, 4.7): lessThan(QT_VERSION, 5.0): QT += declarative
     greaterThan(QT_MAJOR_VERSION, 4): QT += quick
 
+    CONFIG+= plugin
+
     DEFINES += QZXING_QML
 
     HEADERS +=  \
-        $$PWD/QZXingImageProvider.h
+        $$PWD/QZXingImageProvider.h \
+        $$PWD/QZXingPlugin.h
 
     SOURCES +=  \
-        $$PWD/QZXingImageProvider.cpp
+        $$PWD/QZXingImageProvider.cpp \
+        $$PWD/QZXingPlugin.cpp
+
+    plugin.files =+ \
+        qmldir
+
+    importPath = $$[QT_INSTALL_QML]/QZXing
+    plugin.path = $${importPath}
+    target.path = $${importPath}
 }
 
 symbian {
@@ -328,6 +339,11 @@ symbian {
 	QMAKE_PKGCONFIG_INCDIR = ${prefix}/include
 
 	unix:QMAKE_CLEAN += -r pkgconfig lib$${TARGET}.prl
+    importPath = $$[QT_INSTALL_QML]/QZXing
+    target.path = $${importPath}
+    qzxing_qml {
+    INSTALLS+=plugin
+}
 }
 
 win32-msvc*{

src/QZXingPlugin.cpp

@@ -0,0 +1,24 @@
+#include "QZXingPlugin.h"
+#include "QZXing.h"
+#include <QtQml/qqml.h>
+#ifdef QZXING_MULTIMEDIA
+#include <QZXingFilter.h>
+#endif
+#include "QZXingImageProvider.h"
+
+void QZXingPlugin::registerTypes(const char *uri)
+{
+    Q_ASSERT(uri == QLatin1String("QZXing"));
+    qmlRegisterType<QZXing>("QZXing", 2, 3, "QZXing");
+
+#ifdef QZXING_MULTIMEDIA
+    qmlRegisterType<QZXingFilter>("QZXing", 2, 3, "QZXingFilter");
+#endif //QZXING_MULTIMEDIA
+    qmlProtectModule(uri, 2);
+}
+
+void QZXingPlugin::initializeEngine(QQmlEngine *engine, const char *uri)
+{
+    Q_UNUSED(uri)
+    engine->addImageProvider(QLatin1String("QZXing"), new QZXingImageProvider());
+}

src/QZXingPlugin.h

@@ -0,0 +1,15 @@
+#ifndef QXZINGPLUGIN_H
+#define QXZINGPLUGIN_H
+#include <QtQml/QQmlExtensionPlugin>
+#include <QQmlEngine>
+
+class QZXingPlugin : public QQmlExtensionPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID QQmlExtensionInterface_iid)
+public:
+    void registerTypes(const char *uri) override;
+    void initializeEngine(QQmlEngine *engine, const char *uri) override;
+};
+
+#endif // QXZINGPLUGIN_H

src/qmldir

@@ -0,0 +1,4 @@
+module QZXing
+plugin QZXing
+classname QZXingPlugin
+depends QtMultimedia 5.5