Make it run with Qt6

This is a huge commit. Changes:
* Obviously, make it compile
* Make it run (only scarcely tested)
* get rid of most of clang's warnings

Let's see what surprises are in store...

1 files changed, 2 insertions, 2 deletions

diff --git a/mappingtreemodel.h b/mappingtreemodel.h
index 643bc7d..04ee167 100644
--- a/mappingtreemodel.h
+++ b/mappingtreemodel.h
@@ -13,10 +13,10 @@
 #include <QMetaType>
 
 #include "smtreemodel.h"
+#include "mappingdata.h"
 
 class QSqlQuery;
 class SmTreeItem;
-class MappingData;
 class SmTreeItem;
 
 class MappingTreeModel : public SmTreeModel {
@@ -42,7 +42,7 @@ class MappingTreeModel : public SmTreeModel {
         bool renameChild(const QModelIndex &idx, const QString newName);
         bool deleteChild(const QModelIndex &idx);
         MappingData mappingDataFromIndex(QModelIndex &idx) const;
-        MappingData mappingDataFromItem(SmTreeItem *item) const;
+        const MappingData mappingDataFromItem(SmTreeItem *item) const;
         QList<MappingData> siblingMappingDataFromId(int id);
         const QSqlError &lastError() const { return mLastError; }