public SortableTableHeaderListener(SortableTableModel model,
    SortButtonRenderer renderer) 
{
        this.model = model;
        this.renderer = renderer;
}

Standard constructor.

Parameters:

model - the model.

renderer - the renderer.

 public  void mouseClicked(MouseEvent e) 
{
        // not required
}

This event is ignored (not required).

 public  void mouseDragged(MouseEvent e) 
{
        final JTableHeader header = (JTableHeader) e.getComponent();
        if ((header.getDraggedDistance()  > 0) || (header.getResizingColumn() != null)) {
            this.renderer.setPressedColumn(-1);
            this.sortColumnIndex = -1;
        }
}

If the user is dragging or resizing, then we clear the sort column.

 public  void mouseEntered(MouseEvent e) 
{
        // not required
}

This event is ignored (not required).

 public  void mouseExited(MouseEvent e) 
{
        // not required
}

This event is ignored (not required).

 public  void mouseMoved(MouseEvent e) 
{
        // not required
}

This event is ignored (not required).

 public  void mousePressed(MouseEvent e) 
{
        final JTableHeader header = (JTableHeader) e.getComponent();
        if (header.getResizingColumn() == null) {  // resizing takes precedence over sorting
            if (header.getDraggedDistance() <  1) {   // dragging also takes precedence over sorting
                final int columnIndex = header.columnAtPoint(e.getPoint());
                final int modelColumnIndex 
                    = header.getTable().convertColumnIndexToModel(columnIndex);
                if (this.model.isSortable(modelColumnIndex)) {
                    this.sortColumnIndex = header.getTable().convertColumnIndexToModel(columnIndex);
                    this.renderer.setPressedColumn(this.sortColumnIndex);
                    header.repaint();
                    if (header.getTable().isEditing()) {
                        header.getTable().getCellEditor().stopCellEditing();
                    }
                }
                else {
                    this.sortColumnIndex = -1;
                }
            }
        }
}

Handle a mouse press event - if the user is NOT resizing a column and NOT dragging a column then give visual feedback that the column header has been pressed.

 public  void mouseReleased(MouseEvent e) 
{
        final JTableHeader header = (JTableHeader) e.getComponent();
        if (header.getResizingColumn() == null) {  // resizing takes precedence over sorting
            if (this.sortColumnIndex != -1) {
                final SortableTableModel model = (SortableTableModel) header.getTable().getModel();
                final boolean ascending = !model.isAscending();
                model.setAscending(ascending);
                model.sortByColumn(this.sortColumnIndex, ascending);
                this.renderer.setPressedColumn(-1);       // clear
                header.repaint();
            }
        }
}

When the user releases the mouse button, we attempt to sort the table.

 public  void setTableModel(SortableTableModel model) 
{
        this.model = model;
}

Sets the table model for the listener.