Make QtMultimedia dependency optional

components/QRCodeScanner.qml

@@ -131,4 +131,11 @@ Rectangle {
             root.state = "Stopped"
         }
     }
+
+    Component.onCompleted: {
+        if( QtMultimedia.availableCameras.length == 0) {
+            console.log("No camera available. Disable qrScannerEnabled");
+            appWindow.qrScannerEnabled = false;
+        }
+    }
 }

main.cpp

@@ -39,7 +39,6 @@
 #include "WalletManager.h"
 #include "Wallet.h"
 #include "QRCodeImageProvider.h"
-#include "QrCodeScanner.h"
 #include "PendingTransaction.h"
 #include "UnsignedTransaction.h"
 #include "TranslationManager.h"
@@ -57,6 +56,10 @@
 #include "daemon/DaemonManager.h"
 #endif
 
+#ifdef WITH_SCANNER
+#include "QrCodeScanner.h"
+#endif
+
 void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
     // Send all message types to logger
@@ -131,7 +134,9 @@ int main(int argc, char *argv[])
     qRegisterMetaType<TransactionInfo::Direction>();
     qRegisterMetaType<TransactionHistoryModel::TransactionInfoRole>();
 
+#ifdef WITH_SCANNER
     qmlRegisterType<QrCodeScanner>("moneroComponents.QRCodeScanner", 1, 0, "QRCodeScanner");
+#endif
 
     QQmlApplicationEngine engine;
 
@@ -197,19 +202,27 @@ int main(int argc, char *argv[])
     engine.rootContext()->setContextProperty("defaultAccountName", accountName);
     engine.rootContext()->setContextProperty("applicationDirectory", QApplication::applicationDirPath());
 
+    bool builtWithScanner = false;
+#ifdef WITH_SCANNER
+    builtWithScanner = true;
+#endif
+    engine.rootContext()->setContextProperty("builtWithScanner", builtWithScanner);
+
     // Load main window (context properties needs to be defined obove this line)
     engine.load(QUrl(QStringLiteral("qrc:///main.qml")));
     QObject *rootObject = engine.rootObjects().first();
 
-    bool builtWithScanner = false;
 #ifdef WITH_SCANNER
-    builtWithScanner = true;
     QObject *qmlCamera = rootObject->findChild<QObject*>("qrCameraQML");
-    QCamera *camera_ = qvariant_cast<QCamera*>(qmlCamera->property("mediaObject"));
-    QObject *qmlFinder = rootObject->findChild<QObject*>("QrFinder");
-    qobject_cast<QrCodeScanner*>(qmlFinder)->setSource(camera_);
+    if( qmlCamera ){
+        qDebug() << "QrCodeScanner : object found";
+        QCamera *camera_ = qvariant_cast<QCamera*>(qmlCamera->property("mediaObject"));
+        QObject *qmlFinder = rootObject->findChild<QObject*>("QrFinder");
+        qobject_cast<QrCodeScanner*>(qmlFinder)->setSource(camera_);
+    } else {
+        qDebug() << "QrCodeScanner : something went wrong !";
+    }
 #endif
-    engine.rootContext()->setContextProperty("builtWithScanner", builtWithScanner);
 
     QObject::connect(eventFilter, SIGNAL(sequencePressed(QVariant,QVariant)), rootObject, SLOT(sequencePressed(QVariant,QVariant)));
     QObject::connect(eventFilter, SIGNAL(sequenceReleased(QVariant,QVariant)), rootObject, SLOT(sequenceReleased(QVariant,QVariant)));

main.qml

@@ -32,7 +32,6 @@ import QtQuick.Controls 1.1
 import QtQuick.Controls.Styles 1.1
 import QtQuick.Dialogs 1.2
 import Qt.labs.settings 1.0
-import QtMultimedia 5.4
 
 import moneroComponents.Wallet 1.0
 import moneroComponents.PendingTransaction 1.0
@@ -65,9 +64,10 @@ ApplicationWindow {
     property bool viewOnly: false
     property bool foundNewBlock: false
     property int timeToUnlock: 0
-    property bool qrScannerEnabled: (typeof builtWithScanner != "undefined") && builtWithScanner && (QtMultimedia.availableCameras.length > 0)
+    property bool qrScannerEnabled: (typeof builtWithScanner != "undefined") && builtWithScanner
     property int blocksToSync: 1
     property var isMobile: (appWindow.width > 700) ? false : true
+    property var cameraUi
 
     // true if wallet ever synchronized
     property bool walletInitialized : false
@@ -809,6 +809,18 @@ ApplicationWindow {
         // Connect app exit to qml window exit handling
         mainApp.closing.connect(appWindow.close);
 
+        if( appWindow.qrScannerEnabled ){
+            console.log("qrScannerEnabled : load component QRCodeScanner");
+            var component = Qt.createComponent("components/QRCodeScanner.qml");
+            if (component.status == Component.Ready) {
+                console.log("Camera component ready");
+                cameraUi = component.createObject(appWindow);
+            } else {
+                console.log("component not READY !!!");
+                appWindow.qrScannerEnabled = false;
+            }
+        } else console.log("qrScannerEnabled disabled");
+
         if(!walletsFound()) {
             rootItem.state = "wizard"
         } else {
@@ -941,11 +953,6 @@ ApplicationWindow {
         messageText: qsTr("Please wait...")
     }
 
-    QRCodeScanner {
-        id: cameraUi
-        visible : false
-    }
-
     Item {
         id: rootItem
         anchors.fill: parent

monero-wallet-gui.pro

@@ -1,6 +1,6 @@
 TEMPLATE = app
 
-QT += qml quick widgets multimedia
+QT += qml quick widgets
 
 WALLET_ROOT=$$PWD/monero
 
@@ -12,7 +12,6 @@ QMAKE_DISTCLEAN += -r $$WALLET_ROOT
 INCLUDEPATH +=  $$WALLET_ROOT/include \
                 $$PWD/src/libwalletqt \
                 $$PWD/src/QR-Code-generator \
-                $$PWD/src/QR-Code-scanner \
                 $$PWD/src \
                 $$WALLET_ROOT/src
 
@@ -38,7 +37,6 @@ HEADERS += \
     src/libwalletqt/AddressBook.h \
     src/zxcvbn-c/zxcvbn.h \
     src/libwalletqt/UnsignedTransaction.h \
-    src/QR-Code-scanner/QrCodeScanner.h \  
     MainApp.h
 
 SOURCES += main.cpp \
@@ -62,7 +60,6 @@ SOURCES += main.cpp \
     src/libwalletqt/AddressBook.cpp \
     src/zxcvbn-c/zxcvbn.c \
     src/libwalletqt/UnsignedTransaction.cpp \
-    src/QR-Code-scanner/QrCodeScanner.cpp \  
     MainApp.cpp
 
 !ios {
@@ -125,9 +122,15 @@ ios {
 CONFIG(WITH_SCANNER) {
     if( greaterThan(QT_MINOR_VERSION, 5) ) {
         message("using camera scanner")
+        QT += multimedia
         DEFINES += "WITH_SCANNER"
-        HEADERS += src/QR-Code-scanner/QrScanThread.h
-        SOURCES += src/QR-Code-scanner/QrScanThread.cpp
+        INCLUDEPATH += $$PWD/src/QR-Code-scanner
+        HEADERS += \
+            src/QR-Code-scanner/QrScanThread.h \
+            src/QR-Code-scanner/QrCodeScanner.h
+        SOURCES += \
+            src/QR-Code-scanner/QrScanThread.cpp \
+            src/QR-Code-scanner/QrCodeScanner.cpp
         android {
             INCLUDEPATH += $$PWD/../ZBar/include
             LIBS += -lzbarjni -liconv

src/QR-Code-scanner/QrCodeScanner.cpp

@@ -37,14 +37,12 @@ QrCodeScanner::QrCodeScanner(QObject *parent)
     , m_processInterval(750)
     , m_enabled(true)
 {
-#ifdef WITH_SCANNER
     m_probe = new QVideoProbe(this);
     m_thread = new QrScanThread(this);
     m_thread->start();
     QObject::connect(m_thread, SIGNAL(decoded(int,QString)), this, SLOT(processCode(int,QString)));
     QObject::connect(m_thread, SIGNAL(notifyError(const QString &, bool)), this, SIGNAL(notifyError(const QString &, bool)));
     connect(m_probe, SIGNAL(videoFrameProbed(QVideoFrame)), this, SLOT(processFrame(QVideoFrame)));
-#endif
 }
 void QrCodeScanner::setSource(QCamera *camera)
 {
@@ -97,12 +95,10 @@ void QrCodeScanner::setEnabled(bool enabled)
     }
     emit enabledChanged();
 }
-#ifdef WITH_SCANNER
 void QrCodeScanner::timerEvent(QTimerEvent *event)
 {
     if( (event->timerId() == m_processTimerId) ){
         m_thread->addFrame(m_curFrame);
     }
 }
-#endif
 

src/QR-Code-scanner/QrCodeScanner.h

@@ -31,9 +31,7 @@
 
 #include <QImage>
 #include <QVideoFrame>
-#ifdef WITH_SCANNER
 #include "QrScanThread.h"
-#endif
 
 class QVideoProbe;
 class QCamera;
@@ -64,10 +62,8 @@ Q_SIGNALS:
     void notifyError(const QString &error, bool warning = false);
 
 protected:
-#ifdef WITH_SCANNER
     void timerEvent(QTimerEvent *);
     QrScanThread *m_thread;
-#endif
     int m_processTimerId;
     int m_processInterval;
     int m_enabled;