Launcher: fix on-disk variant enumeration

src/GUI/AircraftDetailsView.qml

@@ -104,6 +104,7 @@ Rectangle {
         }
 
         AircraftDownloadPanel {
+            visible: aircraft.isPackaged
             width: parent.width
             uri: aircraft.uri
             installStatus: aircraft.installStatus

src/GUI/AircraftModel.cxx

@@ -611,8 +611,9 @@ QString AircraftItemModel::nameForAircraftURI(QUrl uri) const
 
         // check variants too
         for (int vr=0; vr < item->variants.size(); ++vr) {
-            if (item->variants.at(vr)->path == path) {
-                return item->description;
+            auto variant = item->variants.at(vr);
+            if (variant->path == path) {
+                return variant->description;
             }
         }
     } else if (uri.scheme() == "package") {

src/GUI/QmlAircraftInfo.cxx

@@ -89,7 +89,7 @@ QmlAircraftInfo::~QmlAircraftInfo()
 QUrl QmlAircraftInfo::uri() const
 {
     if (_item) {
-        QUrl::fromLocalFile(resolveItem()->path);
+        return QUrl::fromLocalFile(resolveItem()->path);
     } else if (_package) {
         return QUrl("package:" + QString::fromStdString(_package->qualifiedVariantId(_variant)));
     }
@@ -100,8 +100,10 @@ QUrl QmlAircraftInfo::uri() const
 int QmlAircraftInfo::numVariants() const
 {
     if (_item) {
-        return _item->variants.size();
+        // for on-disk, we don't count the primary item
+        return _item->variants.size() + 1;
     } else if (_package) {
+        // whereas for packaged aircraft we do
         return _package->variants().size();
     }
 
@@ -304,12 +306,11 @@ void QmlAircraftInfo::setUri(QUrl u)
 
     if (u.isLocalFile()) {
         _item = LocalAircraftCache::instance()->findItemWithUri(u);
-        if (_item->variantOf.isEmpty()) {
-            _variant = 0;
-        } else {
-            _item = LocalAircraftCache::instance()->primaryItemFor(_item);
-            _variant = _item->indexOfVariant(u);
-        }
+        int vindex = _item->indexOfVariant(u);
+        // we need to offset the variant index to allow for the different
+        // indexing schemes here (primary included) and in the cache (primary
+        // is not counted)
+        _variant = (vindex >= 0) ? vindex + 1 : 0;
     } else if (u.scheme() == "package") {
         auto ident = u.path().toStdString();
         try {
@@ -327,6 +328,14 @@ void QmlAircraftInfo::setUri(QUrl u)
 
 void QmlAircraftInfo::setVariant(int variant)
 {
+    if (!_item && !_package)
+        return;
+
+    if ((variant < 0) || (variant >= numVariants())) {
+        qWarning() << Q_FUNC_INFO << uri() << "variant index out of range:" << variant;
+        return;
+    }
+
     if (_variant == variant)
         return;
 
@@ -409,6 +418,7 @@ QStringList QmlAircraftInfo::variantNames() const
 {
     QStringList result;
     if (_item) {
+        result.append(_item->description);
         Q_FOREACH(auto v, _item->variants) {
             if (v->description.isEmpty()) {
                 qWarning() << Q_FUNC_INFO << "missing description for " << v->path;
@@ -425,3 +435,8 @@ QStringList QmlAircraftInfo::variantNames() const
     }
     return result;
 }
+
+bool QmlAircraftInfo::isPackaged() const
+{
+    return _package != PackageRef();
+}

src/GUI/QmlAircraftInfo.hxx

@@ -52,6 +52,7 @@ class QmlAircraftInfo : public QObject
 
     Q_PROPERTY(QStringList variantNames READ variantNames NOTIFY infoChanged)
 
+    Q_PROPERTY(bool isPackaged READ isPackaged NOTIFY infoChanged)
 
 public:
     explicit QmlAircraftInfo(QObject *parent = nullptr);
@@ -92,6 +93,8 @@ public:
     void setDownloadBytes(int bytes);
 
     QStringList variantNames() const;
+
+    bool isPackaged() const;
 signals:
     void uriChanged();
     void infoChanged();