/*
   * The contents of this file are subject to the BT "ZEUS" Open Source 
   * Licence (L77741), Version 1.0 (the "Licence"); you may not use this file 
   * except in compliance with the Licence. You may obtain a copy of the Licence
   * from $ZEUS_INSTALL/licence.html or alternatively from
   * http://www.labs.bt.com/projects/agents/zeus/licence.htm
   * 
   * Except as stated in Clause 7 of the Licence, software distributed under the
   * Licence is distributed WITHOUT WARRANTY OF ANY KIND, either express or 
  * implied. See the Licence for the specific language governing rights and 
  * limitations under the Licence.
  * 
  * The Original Code is within the package zeus.*.
  * The Initial Developer of the Original Code is British Telecommunications
  * public limited company, whose registered office is at 81 Newgate Street, 
  * London, EC1A 7AJ, England. Portions created by British Telecommunications 
  * public limited company are Copyright 1996-9. All Rights Reserved.
  * 
  * THIS NOTICE MUST BE INCLUDED ON ANY COPY OF THIS FILE
  */
  
  
  
  /******************************************************************************
  * AgentTableUI.java
  *
  * The Viewer/Controller for displaying and editing the list of Known Agents
  *****************************************************************************/
  
  package zeus.generator;
  
  import java.awt.*;
  import java.awt.event.*;
  import java.util.*;
  import javax.swing.*;
  import javax.swing.table.*;
  import javax.swing.border.*;
  import javax.swing.event.*;
  
  import zeus.gui.*;
  import zeus.gui.fields.*;
  import zeus.util.*;
  
  public class AgentTableUI extends JPanel {
    protected JTable          table;
    protected AgentTableModel model;
    protected AgentGenerator  generator;
  
    static final String[] ERROR_MESSAGE = {
       /* 0 */ "Please select a row before\ncalling this operation"
    };
  
    public AgentTableUI(AgentGenerator generator, GeneratorModel genmodel) {
      this.generator = generator;
  
      model = new AgentTableModel(genmodel);
  
      TableColumnModel tm = new DefaultTableColumnModel();
      TableColumn column;
      column = new TableColumn(AgentTableModel.AGENT,12,
         new DefaultTableCellRenderer(),new DefaultCellEditor(new NameField()));
      column.setHeaderValue(model.getColumnName(AgentTableModel.AGENT));
      tm.addColumn(column);
      column = new TableColumn(AgentTableModel.TASK,24,
         new AgentTableCellRenderer(),
         new AgentTableCellEditor(genmodel));
      column.setHeaderValue(model.getColumnName(AgentTableModel.TASK));
      tm.addColumn(column);
  
      table = new JTable(model,tm);
      setPreferredSize(new Dimension(240,120));
  
      table.getTableHeader().setReorderingAllowed(false);
      table.setColumnSelectionAllowed(false);
      table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  
      JScrollPane scrollPane = new JScrollPane(table);
      scrollPane.setBorder(new BevelBorder(BevelBorder.LOWERED));
      table.setBackground(Color.white);
  
      // Add the scroll pane to this panel.
      setLayout(new BorderLayout());
      add(scrollPane,BorderLayout.CENTER);
  
      MouseListener ml = new MouseAdapter() {
         public void mouseClicked(MouseEvent e) {
            int row = table.rowAtPoint(e.getPoint());
            if ( row != -1 && table.isRowSelected(row) ) {
               if ( e.getClickCount() == 2 )
                  editAgent();
            }
         }
      };
      table.addMouseListener(ml);
    }
  
    void errorMsg(int tag) {
       JOptionPane.showMessageDialog(this,ERROR_MESSAGE[tag],
                                     "Error", JOptionPane.ERROR_MESSAGE);
   }
 
   protected String getSelectedAgentName() {
     int row = table.getSelectedRow();
     if ( row == -1 ) {
        errorMsg(0);
        return null;
     }
     return (String)model.getValueAt(row,AgentTableModel.AGENT);
   }
 
   protected String getSelectedAgentId() {
     int row = table.getSelectedRow();
     if ( row == -1 ) {
        errorMsg(0);
        return null;
     }
     return (String)model.getValueAt(row,AgentTableModel.ID);
   }
 
   public void addNewAgent() {
     model.addNewRow();
   }
 
   public void editAgent() {
     String id = getSelectedAgentId();
     if ( id == null ) return;
     generator.editAgent(id);
   }
 
   public void removeAgent() {
     String id = getSelectedAgentId();
     if ( id == null ) return;
     generator.removeAgent(id);
   }
 
   public void cloneAgent() {
     String id = getSelectedAgentId();
     if ( id == null ) return;
     generator.cloneAgent(id);
   }
 
   public void renameAgent() {
     int row = table.getSelectedRow();
     if ( row == -1 ) {
        errorMsg(0);
        return;
     }
     model.setEditable(true);
     table.editCellAt(row,AgentTableModel.AGENT);
     model.setEditable(false);
   }
 
   public void modifyTaskList() {
     int row = table.getSelectedRow();
     if ( row == -1 ) {
        errorMsg(0);
        return;
     }
     model.setEditable(true);
     table.editCellAt(row,AgentTableModel.TASK);
     model.setEditable(false);
   }
 
   class AgentTableCellEditor extends DefaultCellEditor
                              implements ActionListener {
 
     protected JButton button = new JButton("");
     protected GeneratorModel genmodel;
     protected int row, column;
     protected MultipleSelectionDialog dialog;
 
     public AgentTableCellEditor(GeneratorModel genmodel) {
       super(new JTextField());
       this.genmodel = genmodel;
 
       setClickCountToStart(1);
 
       dialog = new MultipleSelectionDialog(
          (Frame)SwingUtilities.getRoot(table),"Select Tasks");
 
       button.setBackground(Color.white);
       button.setBorderPainted(false);
       button.addActionListener(this);
     }
 
     public void actionPerformed(ActionEvent e) {
       Object src = e.getSource();
       if ( src == button ) {
          dialog.setLocationRelativeTo(button);
          fireEditingCanceled();
          Object[] items = dialog.getSelection();
          model.setValueAt(Misc.stringArray(items),row,column);
       }
     }
     public Component getTableCellEditorComponent(JTable table, Object value,
                                                  boolean isSelected,
                                                  int row, int column) {
 
       this.row = row;
       this.column = column;
       String[] data = genmodel.getTaskNames();
       dialog.setListData(data);
       dialog.setSelection((String[])value);
       button.setText("Click to edit");
       return button;
     }
   }
 
   class AgentTableCellRenderer extends DefaultTableCellRenderer {
      public void setValue(Object value) {
         String[] items = (String[])value;
         String text = Misc.concat(items);
         super.setValue(text);
      }
   }
 }