Bugfixes: don't select dirs and don't crash on write settings

Only select files when archiving pics from filemanager. While at it, I
noticed a crash on close when no item is selected in PicturesWidget. So
check if MappingData is valid on writing settings. Best way is
MappingData::isValid(), and for that I needed a explicit constructor.

1 files changed, 7 insertions, 1 deletions

diff --git a/mappingtreemodel.cpp b/mappingtreemodel.cpp
index 2c636e6..80085c3 100644
--- a/mappingtreemodel.cpp
+++ b/mappingtreemodel.cpp
@@ -305,7 +305,7 @@ bool MappingTreeModel::deleteChild(const QModelIndex &idx){
 }
 
 MappingData MappingTreeModel::mappingDataFromIndex(QModelIndex &idx) const{
-    MappingData retval = { -1, -1, -1, QString(), QList<QStringList>() };
+    MappingData retval;
     if(!idx.isValid()){
         return retval;
     }
@@ -579,3 +579,9 @@ QList<QVariant> MappingTreeResultModel::columnValuesRecursive(SmTreeItem *parent
     }
     return retval;
 }
+
+MappingData::MappingData() : mappingId(-1), parentId(-1), myId(-1) {}
+
+bool MappingData::isValid(){
+    return !(mappingId == -1 && parentId == -1 && myId == -1);
+}