From e94dea72059e4c1cdb9ccc473b21e8357d567409 Mon Sep 17 00:00:00 2001
From: dogmaphobic <mavlink@grubba.com>
Date: Tue, 12 Jul 2016 15:41:14 -0400
Subject: [PATCH] Map Reset Dialog Adding a dialog telling the user the map
 cache database has been reset.

---
 src/QGCApplication.cc                 |  7 +++++++
 src/QtLocationPlugin/QGCMapEngine.cpp | 16 ++++++++++++++--
 src/QtLocationPlugin/QGCMapEngine.h   |  3 +++
 3 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/QGCApplication.cc b/src/QGCApplication.cc
index 697fc95c0..4069124cf 100644
--- a/src/QGCApplication.cc
+++ b/src/QGCApplication.cc
@@ -116,6 +116,8 @@
 #endif
 #endif
 
+#include "QGCMapEngine.h"
+
 QGCApplication* QGCApplication::_app = NULL;
 
 const char* QGCApplication::parameterFileExtension =    "params";
@@ -445,6 +447,11 @@ bool QGCApplication::_initForNormalAppBoot(void)
                     "Your saved settings have been reset to defaults.");
     }
 
+    if (getQGCMapEngine()->wasCacheReset()) {
+        showMessage("The Offline Map Cache database has been upgraded. "
+                    "Your old map cache sets have been reset.");
+    }
+
     settings.sync();
 
     return true;
diff --git a/src/QtLocationPlugin/QGCMapEngine.cpp b/src/QtLocationPlugin/QGCMapEngine.cpp
index fc02dedd7..6b39c4483 100644
--- a/src/QtLocationPlugin/QGCMapEngine.cpp
+++ b/src/QtLocationPlugin/QGCMapEngine.cpp
@@ -126,6 +126,7 @@ QGCMapEngine::QGCMapEngine()
     , _maxDiskCache(0)
     , _maxMemCache(0)
     , _prunning(false)
+    , _cacheWasReset(false)
 {
     qRegisterMetaType<QGCMapTask::TaskType>();
     qRegisterMetaType<QGCTile>();
@@ -142,6 +143,17 @@ QGCMapEngine::~QGCMapEngine()
         delete _urlFactory;
 }
 
+//-----------------------------------------------------------------------------
+void
+QGCMapEngine::_checkWipeDirectory(const QString& dirPath)
+{
+    QDir dir(dirPath);
+    if (dir.exists(dirPath)) {
+        _cacheWasReset = true;
+        _wipeDirectory(dirPath);
+    }
+}
+
 //-----------------------------------------------------------------------------
 void
 QGCMapEngine::_wipeOldCaches()
@@ -152,13 +164,13 @@ QGCMapEngine::_wipeOldCaches()
 #else
     oldCacheDir = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/QGCMapCache55");
 #endif
-    _wipeDirectory(oldCacheDir);
+    _checkWipeDirectory(oldCacheDir);
 #ifdef __mobile__
     oldCacheDir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation)      + QLatin1String("/QGCMapCache100");
 #else
     oldCacheDir = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QLatin1String("/QGCMapCache100");
 #endif
-    _wipeDirectory(oldCacheDir);
+    _checkWipeDirectory(oldCacheDir);
 }
 
 //-----------------------------------------------------------------------------
diff --git a/src/QtLocationPlugin/QGCMapEngine.h b/src/QtLocationPlugin/QGCMapEngine.h
index 97fe8ee7e..8b38d1300 100644
--- a/src/QtLocationPlugin/QGCMapEngine.h
+++ b/src/QtLocationPlugin/QGCMapEngine.h
@@ -86,6 +86,7 @@ public:
     void                        setMaxMemCache      (quint32 size);
     const QString               getCachePath        () { return _cachePath; }
     const QString               getCacheFilename    () { return _cacheFile; }
+    bool                        wasCacheReset       () { return _cacheWasReset; }
 
     UrlFactory*                 urlFactory          () { return _urlFactory; }
 
@@ -108,6 +109,7 @@ signals:
 
 private:
     void _wipeOldCaches         ();
+    void _checkWipeDirectory    (const QString& dirPath);
     bool _wipeDirectory         (const QString& dirPath);
 
 private:
@@ -120,6 +122,7 @@ private:
     quint32                 _maxDiskCache;
     quint32                 _maxMemCache;
     bool                    _prunning;
+    bool                    _cacheWasReset;
 };
 
 extern QGCMapEngine*    getQGCMapEngine();
-- 
2.22.0