javax.swing.RowSorter#getSortKeys ( )源码实例Demo

public static TableState createMetaState(final JTable table, final boolean selectedOnly) {
    final TableState state = new TableState(table, selectedOnly);

    final GraphTableModel tm = (GraphTableModel) table.getModel();
    for (int i = 0; i < table.getColumnCount(); i++) {
        final TableColumn tc = table.getColumnModel().getColumn(i);
        final int modelIndex = tc.getModelIndex();
        final Attribute attr = tm.getAttribute(modelIndex);
        final String label = attr.getName();

        final ColumnState cs = new ColumnState(label, tm.getSegment(modelIndex), tc.getWidth());
        state.columns.add(cs);
    }

    final RowSorter<? extends TableModel> sorter = table.getRowSorter();
    for (final RowSorter.SortKey sk : sorter.getSortKeys()) {
        // TODO: should really store the column label + segment here.
        state.sortOrder.add(String.format("%d,%s", sk.getColumn(), sk.getSortOrder()));
    }

    return state;
}
 

/**
 * Tries to return the sort key for the given column.
 *
 * @param sorter
 * @param column
 * @return the sort key or {@code null}
 */
private SortKey getSortKey(RowSorter<? extends TableModel> sorter, int column) {
	if (sorter == null) {
		return null;
	}

	for (Object sortObj : sorter.getSortKeys()) {
		SortKey key = (SortKey) sortObj;
		if (key.getColumn() == column) {
			return key;
		}
	}
	return null;
}
 

/**
 * Returns the current sort key, or null if the column is unsorted.
 *
 * @param table the table
 * @param column the column index
 * @return the SortKey, or null if the column is unsorted
 */
protected SortKey getSortKey(JTable table, int column) {
  RowSorter<?> rowSorter = table.getRowSorter();
  if (rowSorter == null) {
    return null;
  }

  List<?> sortedColumns = rowSorter.getSortKeys();
  if (sortedColumns.size() > 0) {
    return (SortKey) sortedColumns.get(0);
  }
  return null;
}
 

/**
 * @see com.seaglasslookandfeel.ui.SeaGlassTableHeaderUI$DefaultTableCellHeaderRenderer#getTableCellRendererComponent(javax.swing.JTable,
 *      java.lang.Object, boolean, boolean, int, int)
 */
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row,
        int column) {
    boolean hasRollover = false; // (column == getRolloverColumn());

    if (isSelected || hasRollover || hasFocus) {
        SeaGlassLookAndFeel.setSelectedUI((SeaGlassLabelUI) SeaGlassLookAndFeel.getUIOfType(getUI(), SeaGlassLabelUI.class),
                                          isSelected, hasFocus, table.isEnabled(), hasRollover);
    } else {
        SeaGlassLookAndFeel.resetSelectedUI();
    }

    // Stuff a variable into the client property of this renderer
    // indicating the sort order, so that different rendering can be
    // done for the header based on sorted state.
    RowSorter                                   rs       = table == null ? null : table.getRowSorter();
    java.util.List<? extends RowSorter.SortKey> sortKeys = rs == null ? null : rs.getSortKeys();

    if (sortKeys != null && sortKeys.size() > 0 && sortKeys.get(0).getColumn() == table.convertColumnIndexToModel(column)) {
        switch (sortKeys.get(0).getSortOrder()) {

        case ASCENDING:
            putClientProperty("Table.sortOrder", "ASCENDING");
            break;

        case DESCENDING:
            putClientProperty("Table.sortOrder", "DESCENDING");
            break;

        case UNSORTED:
            putClientProperty("Table.sortOrder", "UNSORTED");
            break;

        default:
            throw new AssertionError("Cannot happen");
        }
    } else {
        putClientProperty("Table.sortOrder", "UNSORTED");
    }

    super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

    return this;
}