private void showP(File file) {
        try {
            p = DataIO.properties(new FileReader(file), "Parameter");
            List<String> dims = DataIO.keysByMeta(p, "role", "dimension");
            List<String> dims2d = DataIO.keysForBounds(p, 2);
            dimCombo.removeAllItems();
            dimCombo.addItem("---- GENERAL ----");
            dimCombo.addItem(" <ALL>");
            dimCombo.addItem(" <SCALARS>");
            dimCombo.addItem("------ DIMS -----");
            for (String s : dims) {
                dimCombo.addItem("  " + s);
            }
            dimCombo.addItem("------- 2D -------");
            for (String s : dims2d) {
                dimCombo.addItem("  " + s);
            }
            dimCombo.setSelectedIndex(1);
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }