Mouse Dragging ViewPort Scroll

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

Code

//*
MouseAdapter hsl1 = new HandScrollListener();
vport.addMouseMotionListener(hsl1);
vport.addMouseListener(hsl1);
/*/
MouseAdapter hsl2 = new DragScrollListener();
label.addMouseMotionListener(hsl2);
label.addMouseListener(hsl2);
//*/

class HandScrollListener extends MouseInputAdapter {
  private final Cursor defCursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
  private final Cursor hndCursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
  private final Point pp = new Point();
  @Override
  public void mouseDragged(final MouseEvent e) {
    Point cp = e.getPoint();
    Point vp = vport.getViewPosition();
    //= SwingUtilities.convertPoint(vport,0,0,label);
    vp.translate(pp.x-cp.x, pp.y-cp.y);
    if(r1.isSelected()) {
      label.scrollRectToVisible(new Rectangle(vp, vport.getSize()));
    }else{
      vport.setViewPosition(vp);
    }
    pp.setLocation(cp);
  }
  @Override
  public void mousePressed(MouseEvent e) {
    label.setCursor(hndCursor);
    pp.setLocation(e.getPoint());
  }
  @Override
  public void mouseReleased(MouseEvent e) {
    label.setCursor(defCursor);
    label.repaint();
  }
}

class DragScrollListener extends MouseAdapter {
  private final Cursor defCursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
  private final Cursor hndCursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
  private final Point pp = new Point();
  @Override public void mouseDragged(MouseEvent e) {
    final JComponent jc = (JComponent)e.getSource();
    Container c = jc.getParent();
    if(c instanceof JViewport) {
      JViewport vport = (JViewport)c;
      Point cp = SwingUtilities.convertPoint(jc,e.getPoint(),vport);
      Point vp = vport.getViewPosition();
      vp.translate(pp.x-cp.x, pp.y-cp.y);
      jc.scrollRectToVisible(new Rectangle(vp, vport.getSize()));
      pp.setLocation(cp);
    }
  }
  @Override public void mousePressed(MouseEvent e) {
    JComponent jc = (JComponent)e.getSource();
    Container c = jc.getParent();
    if(c instanceof JViewport) {
      jc.setCursor(hndCursor);
      JViewport vport = (JViewport)c;
      Point cp = SwingUtilities.convertPoint(jc,e.getPoint(),vport);
      pp.setLocation(cp);
    }
  }
  @Override public void mouseReleased(MouseEvent e) {
    ((JComponent)e.getSource()).setCursor(defCursor);
  }
}

References

• Java Swing Tips: Mouse Drag Auto Scrolling
• Mouse Drag Auto Scrolling(Japanese)
• Mouse Dragging ViewPort Scroll(Japanese)

Reset RowFilter before sorting

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

Code

final RowFilter < TableModel, Integer > filter = new RowFilter () {
  @Override
  public boolean include(Entry < ? extends TableModel, ? extends Integer > entry) {
    int vidx = table.convertRowIndexToView(entry.getIdentifier());
    return vidx < USER_SPECIFIED_NUMBER_OF_ROWS;
  }
};
final TableRowSorter sorter = new TableRowSorter(model) {
  @Override
  public void toggleSortOrder(int column) {
    if(check.isSelected()) {
      //((AbstractTableModel)table.getModel()).fireTableDataChanged();
      allRowsChanged();
      super.toggleSortOrder(column);
      allRowsChanged();
    }else{
      super.toggleSortOrder(column);
    }
  }
};
//final TableRowSorter 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)