JTable highlighting and filtering with regular expression

• download example.jar
• download src.zip
• repository

Code

class HighlightTableCellRenderer
    extends JTextField implements TableCellRenderer {
  private static final Color BGC= new Color(220, 240, 255);
  private final transient Highlighter.HighlightPainter highlightPainter
    = new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);
  private String pattern = "";
  private String prev;

  public boolean setPattern(String str) {
    if (str == null || str.equals(pattern)) {
      return false;
    } else {
      prev = pattern;
      pattern = str;
      return true;
    }
  }

  public HighlightTableCellRenderer() {
    super();
    setOpaque(true);
    setBorder(BorderFactory.createEmptyBorder());
    setForeground(Color.BLACK);
    setBackground(Color.WHITE);
    setEditable(false);
  }

  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected,
      boolean hasFocus, int row, int column) {
    String txt = Objects.toString(value, "");
    Highlighter highlighter = getHighlighter();
    highlighter.removeAllHighlights();
    setText(txt);
    setBackground(isSelected ? BGC : Color.WHITE);
    if (pattern != null && !pattern.isEmpty() && !pattern.equals(prev)) {
      Matcher matcher = Pattern.compile(pattern).matcher(txt);
      int pos = 0;
      while (matcher.find(pos) && !matcher.group().isEmpty()) {
        int start = matcher.start();
        int end   = matcher.end();
        try {
          highlighter.addHighlight(start, end, highlightPainter);
        } catch (BadLocationException | PatternSyntaxException e) {
          e.printStackTrace();
        }
        pos = end;
      }
    }
    return this;
  }
}

References

• JTable highlighting and filtering with regular expression(Japanese)

Reset RowFilter before sorting

• download example.jar
• download src.zip
• repository

Code

RowFilter<TableModel, Integer> filter = new RowFilter<TableModel, Integer>() {
  @Override public boolean include(Entry<? extends TableModel, ? extends Integer> entry) {
    int vidx = table.convertRowIndexToView(entry.getIdentifier());
    return vidx < USER_SPECIFIED_NUMBER_OF_ROWS;
  }
};
TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model) {
  @Override public void toggleSortOrder(int column) {
    if (check.isSelected()) {
      RowFilter<? super TableModel, ? super Integer> f = getRowFilter();
      setRowFilter(null);
      super.toggleSortOrder(column);
      setRowFilter(f);
    } else {
      super.toggleSortOrder(column);
    }
  }
};
table.setRowSorter(sorter);
sorter.setSortKeys(Arrays.asList(new RowSorter.SortKey(1, SortOrder.DESCENDING)));

References

• Reset RowFilter before sorting(Japanese)

JTable pagination using RowFilter

• download example.jar
• download src.zip
• repository

Code

private static int LR_PAGE_SIZE = 5;

private final String[] columnNames = {"Year", "String", "Comment"};
private final DefaultTableModel model = new DefaultTableModel(null, columnNames) {
  @Override public Class<?> getColumnClass(int column) {
    return (column == 0) ? Integer.class : Object.class;
  }
};
private TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
private Box box = Box.createHorizontalBox();

private void initLinkBox(final int itemsPerPage, final int currentPageIndex) {
  // assert currentPageIndex > 0;
  sorter.setRowFilter(new RowFilter<TableModel, Integer>() {
    @Override
    public boolean include(Entry<? extends TableModel, ? extends Integer> entry) {
      int ti = currentPageIndex - 1;
      int ei = entry.getIdentifier();
      return ti * itemsPerPage <= ei && ei < ti * itemsPerPage + itemsPerPage;
    }
  });

  int startPageIndex = currentPageIndex - LR_PAGE_SIZE;
  if (startPageIndex <= 0) {
    startPageIndex = 1;
  }

// #if 0 //BUG
  // int maxPageIndex = (model.getRowCount() / itemsPerPage) + 1;
// #else
  /* "maxPageIndex" gives one blank page if the module of the division is not zero.
   *   pointed out by erServi
   * e.g. rowCount=100, maxPageIndex=100
   */
  int rowCount = model.getRowCount();
  int v = rowCount % itemsPerPage == 0 ? 0 : 1;
  int maxPageIndex = rowCount / itemsPerPage + v;
// #endif
  int endPageIndex = currentPageIndex + LR_PAGE_SIZE - 1;
  if (endPageIndex > maxPageIndex) {
    endPageIndex = maxPageIndex;
  }

  box.removeAll();
  if (startPageIndex >= endPageIndex) {
    // if I only have one page, Y don't want to see pagination buttons
    // suggested by erServi
    return;
  }

  ButtonGroup bg = new ButtonGroup();
  JRadioButton f = makePrevNextRadioButton(
      itemsPerPage, 1, "|<", currentPageIndex > 1);
  box.add(f);
  bg.add(f);
  JRadioButton p = makePrevNextRadioButton(
      itemsPerPage, currentPageIndex - 1, "<", currentPageIndex > 1);
  box.add(p);
  bg.add(p);
  box.add(Box.createHorizontalGlue());
  for (int i = startPageIndex; i <= endPageIndex; i++) {
    JRadioButton c = makeRadioButton(itemsPerPage, currentPageIndex, i);
    box.add(c);
    bg.add(c);
  }
  box.add(Box.createHorizontalGlue());
  JRadioButton n = makePrevNextRadioButton(
      itemsPerPage, currentPageIndex + 1, ">", currentPageIndex < maxPageIndex);
  box.add(n);
  bg.add(n);
  JRadioButton l = makePrevNextRadioButton(
      itemsPerPage, maxPageIndex, ">|", currentPageIndex < maxPageIndex);
  box.add(l);
  bg.add(l);
  box.revalidate();
  box.repaint();
}

References

• JTable pagination using RowFilter(Japanese)
• JTable pagination using RowFilter, SwingWorker and JTextField(Japanese)