adding a proxyModel

src/cpp/songsqlmodel.cpp

@@ -709,3 +709,14 @@ void SongSqlModel::updateFontSize(const int &row, const int &fontSize) {
   submitAll();
   emit fontSizeChanged();
 }
+// SongProxyModel
+
+SongProxyModel::SongProxyModel(QObject *parent)
+  :QSortFilterProxyModel(parent)
+{
+  SongSqlModel songModel = new SongSqlModel;
+  setSourceModel(songModel);
+  setDynamicSortFilter(true);
+  setFilterRole(Qt::UserRole + 1);
+  setFilterCaseSensitivity(Qt::CaseInsensitive);
+}

src/cpp/songsqlmodel.h

@@ -2,6 +2,7 @@
 #define SONGSQLMODEL_H
 
 #include <QSqlTableModel>
+#include <QSortFilterProxyModel>
 #include <qobjectdefs.h>
 #include <qqml.h>
 #include <qvariant.h>
@@ -107,4 +108,15 @@ private:
     int m_fontSize;
 };
 
+class SongProxyModel : public QSortFilterProxyModel
+{
+  Q_OBJECT
+
+public:
+  explicit SongProxyModel(QObject *parent = nullptr);
+  
+  
+};
+
+
 #endif //SONGSQLMODEL_H