Implement MappingTreeWidget

This is a rather large commit. It implements MappingTreeWidget using
MappingTreeModel unsurprisingly this uncovered some exciting bugs.

Fixes the following bugs in MappingTreeModel:
* use insertRows() and removeRows() when addings children, because
dataChanged() won't do it.
* don't use a prepared QSqlQuery when fetching children recursively.
This won't work because the query is still active when we invoke
ourselves again. Put the query on the stack instead
* Keep the model sorted.

Also add an entry for a MappingTreeEditor to the File-Menu.

1 files changed, 4 insertions, 2 deletions

diff --git a/shemov.pro b/shemov.pro
index 16dadef..ef92490 100644
--- a/shemov.pro
+++ b/shemov.pro
@@ -36,7 +36,8 @@ SOURCES = main.cpp \
     smdialog.cpp \
     propertiesdialog.cpp \
     dbanalyzer.cpp \
-    mappingtreemodel.cpp
+    mappingtreemodel.cpp \
+    mappingtreewidget.cpp
 HEADERS = listitem.h \
     filesystemdirproxy.h \
     filesystemwidget.h \
@@ -68,6 +69,7 @@ HEADERS = listitem.h \
     smdialog.h \
     propertiesdialog.h \
     dbanalyzer.h \
-    mappingtreemodel.h
+    mappingtreemodel.h \
+    mappingtreewidget.h
 LIBS += -lmagic -lXfixes -lX11
 RESOURCES = shemov.qrc