Fixed adding and deleting children from MappingTreeModel

Another fix to MappingTreeModel's new database layout. I think we're
getting there...

Insert the mappings into mapping_parents2 and add the MapParentId to the
newly created index in the model. For now, the added date remains
invalid. Make it possible (again?) to add root items to
MappingTreeModel. For this I had to design a new QDialog with a
checkbox.

This one fixes another bug in SmTreeModel: Don't call parent() on a null
pointer.

Sometimes I'm getting random SIGBUS-Signals, but maybe that's because of
the debug build of qt I'm using. Couldn't track it down yet...

1 files changed, 16 insertions, 0 deletions

diff --git a/mappingtreewidget.h b/mappingtreewidget.h
index 60bbecc..600c6d5 100644
--- a/mappingtreewidget.h
+++ b/mappingtreewidget.h
@@ -17,6 +17,7 @@ class MappingTreeModel;
 class QComboBox;
 class QPushButton;
 class QLabel;
+class QCheckBox;
 class QSortFilterProxyModel;
 class QStringListModel;
 class QAction;
@@ -98,6 +99,21 @@ class MappingEditWidget : public QWidget {
         QPushButton *mRemoveMapping;
 };
 
+class MappingInputDialog : public QDialog {
+    Q_OBJECT
+    public:
+        explicit MappingInputDialog(QWidget *parent, Qt::WindowFlags f = 0);
+        QString mappingName() const;
+        bool createRoot() const;
+
+    private:
+        QPushButton *mOk;
+        QPushButton *mCancel;
+        QLineEdit *mEditor;
+        QCheckBox *mIsRoot;
+
+};
+
 class MappingEditDialog : public QDialog {
     Q_OBJECT
     public: