Implement glyph sorting.

pixelocr/gui/glypheditor.py

@@ -81,8 +81,18 @@ class GlyphDBModel(QAbstractTableModel):
         self.endRemoveRows()
         return True
 
+    def sort(self, column, order):
+        if column == 0:
+            self.layoutAboutToBeChanged.emit()
+            self.keys.sort(key=lambda key: self.glyphdb[key], reverse = (order == Qt.DescendingOrder))
+            self.layoutChanged.emit()
+
 
 class GlyphTableView(QTableView):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.setSortingEnabled(True)
+
     def keyPressEvent(self, event):
         if event.key() == Qt.Key_Delete:
             print('delete')