basictableui.java

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          if (!table.isCellSelected(rowLead, colLead))
            {
              rowModel.addSelectionInterval(rowModel.getMinSelectionIndex(), 
                                            rowModel.getMinSelectionIndex());
              colModel.addSelectionInterval(colModel.getMinSelectionIndex(), 
                                            colModel.getMinSelectionIndex());
              return;
            }
          
          // multRowsSelected and multColsSelected tell us if multiple rows or
          // columns are selected, respectively
          boolean multRowsSelected, multColsSelected;
          multRowsSelected = table.getSelectedRowCount() > 1 &&
            table.getRowSelectionAllowed();
          
          multColsSelected = table.getSelectedColumnCount() > 1 &&
            table.getColumnSelectionAllowed();
          
          // If there is just one selection, select the next cell, and wrap
          // when you get to the edges of the table.
          if (!multColsSelected && !multRowsSelected)
            {
              if (command.indexOf("Column") != -1) 
                advanceSingleSelection(colModel, colMax, rowModel, rowMax, 
                                       (command.equals
                                        ("selectPreviousColumnCell")));
              else
                advanceSingleSelection(rowModel, rowMax, colModel, colMax, 
                                       (command.equals 
                                        ("selectPreviousRowCell")));
              return;
            }
          
          
          // rowMinSelected and rowMaxSelected are the minimum and maximum
          // values respectively of selected cells in the row selection model
          // Similarly for colMinSelected and colMaxSelected.
          int rowMaxSelected = table.getRowSelectionAllowed() ? 
            rowModel.getMaxSelectionIndex() : table.getModel().getRowCount() - 1;
          int rowMinSelected = table.getRowSelectionAllowed() ? 
            rowModel.getMinSelectionIndex() : 0; 
          int colMaxSelected = table.getColumnSelectionAllowed() ? 
            colModel.getMaxSelectionIndex() : 
            table.getModel().getColumnCount() - 1;
          int colMinSelected = table.getColumnSelectionAllowed() ? 
            colModel.getMinSelectionIndex() : 0;
          
          // If there are multiple rows and columns selected, select the next
          // cell and wrap at the edges of the selection.  
          if (command.indexOf("Column") != -1) 
            advanceMultipleSelection(colModel, colMinSelected, colMaxSelected, 
                                     rowModel, rowMinSelected, rowMaxSelected, 
                                     (command.equals
                                      ("selectPreviousColumnCell")), true);
          
          else
            advanceMultipleSelection(rowModel, rowMinSelected, rowMaxSelected, 
                                     colModel, colMinSelected, colMaxSelected, 
                                     (command.equals 
                                      ("selectPreviousRowCell")), false);
        }
      else if (command.equals("selectNextColumn"))
        {
          rowModel.setSelectionInterval(rowLead,rowLead);
          colModel.setSelectionInterval(Math.min(colLead + 1, colMax),
                                        Math.min(colLead + 1, colMax));
        }
      else if (command.equals("scrollLeftExtendSelection"))
        {
          int target;
          if (colLead == getFirstVisibleColumnIndex())
            target = Math.max
              (0, colLead - (getLastVisibleColumnIndex() -
                             getFirstVisibleColumnIndex() + 1));
          else
            target = getFirstVisibleColumnIndex();
          
          colModel.setLeadSelectionIndex(target);
          rowModel.setLeadSelectionIndex(rowLead);
        }
      else if (command.equals("scrollDownChangeSelection"))
        {
          int target;
          if (rowLead == getLastVisibleRowIndex())
            target = Math.min
              (rowMax, rowLead + (getLastVisibleRowIndex() - 
                                  getFirstVisibleRowIndex() + 1));
          else
            target = getLastVisibleRowIndex();
          
          rowModel.setSelectionInterval(target, target);
          colModel.setSelectionInterval(colLead, colLead);
        }
      else if (command.equals("scrollRightExtendSelection"))
        {
          int target;
          if (colLead == getLastVisibleColumnIndex())
            target = Math.min
              (colMax, colLead + (getLastVisibleColumnIndex() -
                                  getFirstVisibleColumnIndex() + 1));
          else
            target = getLastVisibleColumnIndex();
          
          colModel.setLeadSelectionIndex(target);
          rowModel.setLeadSelectionIndex(rowLead);
        }
      else if (command.equals("selectAll"))
        {
          table.selectAll();
        }
      else if (command.equals("selectLastRowExtendSelection"))
        {
          rowModel.setLeadSelectionIndex(rowMax);
          colModel.setLeadSelectionIndex(colLead);
        }
      else if (command.equals("scrollDownExtendSelection"))
        {
          int target;
          if (rowLead == getLastVisibleRowIndex())
            target = Math.min
              (rowMax, rowLead + (getLastVisibleRowIndex() - 
                                  getFirstVisibleRowIndex() + 1));
          else
            target = getLastVisibleRowIndex();
          
          rowModel.setLeadSelectionIndex(target);
          colModel.setLeadSelectionIndex(colLead);
        }      
      else if (command.equals("scrollUpChangeSelection"))
        {
          int target;
          if (rowLead == getFirstVisibleRowIndex())
            target = Math.max
              (0, rowLead - (getLastVisibleRowIndex() - 
                             getFirstVisibleRowIndex() + 1));
          else
            target = getFirstVisibleRowIndex();
          
          rowModel.setSelectionInterval(target, target);
          colModel.setSelectionInterval(colLead, colLead);
        }
      else if (command.equals("selectNextRowChangeLead"))
          {
            if (rowModel.getSelectionMode() != ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)
              {
                // just "selectNextRow"
                rowModel.setSelectionInterval(Math.min(rowLead + 1, rowMax),
                                              Math.min(rowLead + 1, rowMax));
                colModel.setSelectionInterval(colLead,colLead);
              }
            else
              rowModel.moveLeadSelectionIndex(Math.min(rowLead + 1, rowMax));
          }
      else if (command.equals("selectPreviousRowChangeLead"))
        {
          if (rowModel.getSelectionMode() != ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)
            {
              // just selectPreviousRow
              rowModel.setSelectionInterval(Math.max(rowLead - 1, 0),
                                            Math.min(rowLead -1, 0));
              colModel.setSelectionInterval(colLead,colLead);
            }
          else
            rowModel.moveLeadSelectionIndex(Math.max(rowLead - 1, 0));
        }
      else if (command.equals("selectNextColumnChangeLead"))
        {
          if (colModel.getSelectionMode() != ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)            
            {
              // just selectNextColumn
              rowModel.setSelectionInterval(rowLead,rowLead);
              colModel.setSelectionInterval(Math.min(colLead + 1, colMax),
                                            Math.min(colLead + 1, colMax));
            }
          else
            colModel.moveLeadSelectionIndex(Math.min(colLead + 1, colMax));
        }
      else if (command.equals("selectPreviousColumnChangeLead"))
        {
          if (colModel.getSelectionMode() != ListSelectionModel.MULTIPLE_INTERVAL_SELECTION)            
            {
              // just selectPreviousColumn
              rowModel.setSelectionInterval(rowLead,rowLead);
              colModel.setSelectionInterval(Math.max(colLead - 1, 0),
                                            Math.max(colLead - 1, 0));
              
            }
          else
            colModel.moveLeadSelectionIndex(Math.max(colLead - 1, 0));
        }
      else if (command.equals("addToSelection"))
          {
            if (!table.isEditing())
              {
                int oldRowAnchor = rowModel.getAnchorSelectionIndex();
                int oldColAnchor = colModel.getAnchorSelectionIndex();
                rowModel.addSelectionInterval(rowLead, rowLead);
                colModel.addSelectionInterval(colLead, colLead);
                rowModel.setAnchorSelectionIndex(oldRowAnchor);
                colModel.setAnchorSelectionIndex(oldColAnchor);
              }
          }
      else if (command.equals("extendTo"))
        {
          rowModel.setSelectionInterval(rowModel.getAnchorSelectionIndex(),
                                        rowLead);
          colModel.setSelectionInterval(colModel.getAnchorSelectionIndex(),
                                        colLead);
        }
      else if (command.equals("toggleAndAnchor"))
        {
          if (rowModel.isSelectedIndex(rowLead))
            rowModel.removeSelectionInterval(rowLead, rowLead);
          else
            rowModel.addSelectionInterval(rowLead, rowLead);
          
          if (colModel.isSelectedIndex(colLead))
            colModel.removeSelectionInterval(colLead, colLead);
          else
            colModel.addSelectionInterval(colLead, colLead);
          
          rowModel.setAnchorSelectionIndex(rowLead);
          colModel.setAnchorSelectionIndex(colLead);
        }
      else if (command.equals("stopEditing"))
        {
          table.editingStopped(new ChangeEvent(command));
        }
      else 
        {
          // If we're here that means we bound this TableAction class
          // to a keyboard input but we either want to ignore that input
          // or we just haven't implemented its action yet.
          
          // Uncomment the following line to print the names of unused bindings
          // when their keys are pressed
          
          // System.out.println ("not implemented: "+e.getActionCommand());
        }

      // Any commands whose keyStrokes should be used by the Editor should not
      // cause editing to be stopped: ie, the SPACE sends "addToSelection" but 
      // if the table is in editing mode, the space should not cause us to stop
      // editing because it should be used by the Editor.
      if (table.isEditing() && command != "startEditing"
          && command != "addToSelection")
        table.editingStopped(new ChangeEvent("update"));
            
      table.scrollRectToVisible
        (table.getCellRect(rowModel.getLeadSelectionIndex(), 
                           colModel.getLeadSelectionIndex(), false));
      table.repaint();
    }
    
    /**
     * Returns the column index of the first visible column.
     * @return the column index of the first visible column.
     */
    int getFirstVisibleColumnIndex()
    {
      ComponentOrientation or = table.getComponentOrientation();
      Rectangle r = table.getVisibleRect();
      if (!or.isLeftToRight())
        r.translate((int) r.getWidth() - 1, 0);
      return table.columnAtPoint(r.getLocation());
    }
    
    /**
     * Returns the column index of the last visible column.
     *
     */
    int getLastVisibleColumnIndex()
    {
      ComponentOrientation or = table.getComponentOrientation();
      Rectangle r = table.getVisibleRect();
      if (or.isLeftToRight())
        r.translate((int) r.getWidth() - 1, 0);
      return table.columnAtPoint(r.getLocation());      
    }
    
    /**
     * Returns the row index of the first visible row.
     *
     */
    int getFirstVisibleRowIndex()
    {
      ComponentOrientation or = table.getComponentOrientation();
      Rectangle r = table.getVisibleRect();
      if (!or.isLeftToRight())
        r.translate((int) r.getWidth() - 1, 0);
      return table.rowAtPoint(r.getLocation());
    }
    
    /**
     * Returns the row index of the last visible row.
     *
     */
    int getLastVisibleRowIndex()
    {
      ComponentOrientation or = table.getComponentOrientation();
      Rectangle r = table.getVisibleRect();
      r.translate(0, (int) r.getHeight() - 1);
      if (or.isLeftToRight())
        r.translate((int) r.getWidth() - 1, 0);
      // The next if makes sure that we don't return -1 simply because
      // there is white space at the bottom of the table (ie, the display
      // area is larger than the table)
      if (table.rowAtPoint(r.getLocation()) == -1)
        {
          if (getFirstVisibleRowIndex() == -1)
            return -1;
          else
            return table.getModel().getRowCount() - 1;
        }
      return table.rowAtPoint(r.getLocation());
    }

    /**
     * A helper method for the key bindings.  Used because the actions
     * for TAB, SHIFT-TAB, ENTER, and SHIFT-ENTER are very similar.
     *
     * Selects the next (previous if SHIFT pressed) column for TAB, or row for
     * ENTER from within the currently selected cells.
     *
     * @param firstModel the ListSelectionModel for columns (TAB) or
     * rows (ENTER)
     * @param firstMin the first selected index in firstModel
     * @param firstMax the last selected index in firstModel
     * @param secondModel the ListSelectionModel for rows (TAB) or 
     * columns (ENTER)
     * @param secondMin the first selected index in secondModel
     * @param secondMax the last selected index in secondModel
     * @param reverse true if shift was held for the event