Deleting old map tile disk cache if one is found.

src/QtLocationPlugin/QGCMapEngine.cpp

@@ -45,6 +45,8 @@ Q_DECLARE_METATYPE(QList<QGCTile*>)
 static const char* kDbFileName = "qgcMapCache.db";
 static QLocale kLocale;
 
+#define CACHE_PATH_VERSION  "100"
+
 struct stQGeoTileCacheQGCMapTypes {
     const char* name;
     UrlFactory::MapType type;
@@ -157,10 +159,18 @@ QGCMapEngine::~QGCMapEngine()
 void
 QGCMapEngine::init()
 {
+    //-- Delete old style cache (if present)
 #ifdef __mobile__
-    QString cacheDir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)      + QLatin1String("/QGCMapCache55");
+    QString oldCacheDir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)      + QLatin1String("/QGCMapCache55");
 #else
-    QString cacheDir = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/QGCMapCache55");
+    QString oldCacheDir = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/QGCMapCache55");
+#endif
+    _wipeDirectory(oldCacheDir);
+    //-- Figure out cache path
+#ifdef __mobile__
+    QString cacheDir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)      + QLatin1String("/QGCMapCache" CACHE_PATH_VERSION);
+#else
+    QString cacheDir = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/QGCMapCache" CACHE_PATH_VERSION);
 #endif
     if(!QDir::root().mkpath(cacheDir)) {
         qWarning() << "Could not create mapping disk cache directory: " << cacheDir;
@@ -183,6 +193,28 @@ QGCMapEngine::init()
 }
 
 //-----------------------------------------------------------------------------
+bool
+QGCMapEngine::_wipeDirectory(const QString& dirPath)
+{
+    bool result = true;
+    QDir dir(dirPath);
+    if (dir.exists(dirPath)) {
+        Q_FOREACH(QFileInfo info, dir.entryInfoList(QDir::NoDotAndDotDot | QDir::System | QDir::Hidden  | QDir::AllDirs | QDir::Files, QDir::DirsFirst)) {
+            if (info.isDir()) {
+                result = _wipeDirectory(info.absoluteFilePath());
+            } else {
+                result = QFile::remove(info.absoluteFilePath());
+            }
+            if (!result) {
+                return result;
+            }
+        }
+        result = dir.rmdir(dirPath);
+    }
+    return result;
+}
+
+//-----------------------------------------------------------------------------
 void
 QGCMapEngine::addTask(QGCMapTask* task)
 {

src/QtLocationPlugin/QGCMapEngine.h

@@ -120,6 +120,9 @@ signals:
     void updateTotals           (quint32 totaltiles, quint64 totalsize, quint32 defaulttiles, quint64 defaultsize);
 
 private:
+    bool _wipeDirectory(const QString& dirPath);
+
+private:
     QGCCacheWorker          _worker;
     QString                 _cachePath;
     QString                 _cacheFile;

src/QtLocationPlugin/QGeoTiledMappingManagerEngineQGC.cpp

@@ -194,10 +194,12 @@ QGeoTiledMappingManagerEngineQGC::_setCache(const QVariantMap &parameters)
     if (parameters.contains(QStringLiteral("mapping.cache.directory")))
         cacheDir = parameters.value(QStringLiteral("mapping.cache.directory")).toString();
     else {
-        cacheDir = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/QGCMapCache55");
-        if(!QDir::root().mkpath(cacheDir)) {
-            qWarning() << "Could not create mapping disk cache directory: " << cacheDir;
-            cacheDir = QDir::homePath() + QLatin1String("/.qgcmapscache/");
+        cacheDir = getQGCMapEngine()->getCachePath();
+        if(!QFileInfo(cacheDir).exists()) {
+            if(!QDir::root().mkpath(cacheDir)) {
+                qWarning() << "Could not create mapping disk cache directory: " << cacheDir;
+                cacheDir = QDir::homePath() + QLatin1String("/.qgcmapscache/");
+            }
         }
     }
     if(!QFileInfo(cacheDir).exists()) {