+geometry_get_height (const GSheetRow *geom, glong unit, gpointer data)
+{
+ return ROW_HEIGHT;
+}
+
+static guint
+geometry_get_top_ypixel (const GSheetRow *geo, glong row, gpointer data)
+{
+ return row * ROW_HEIGHT;
+}
+
+static glong
+geometry_pixel_to_row (const GSheetRow *geo, guint pixel, gpointer data)