package org.lsst.ccs.plugin.jas3.trending.timeselection;
   
   import java.awt.Component;
   import java.awt.Window;
   import java.awt.event.ActionEvent;
   import java.awt.event.ActionListener;
   import javax.swing.JButton;
   import javax.swing.JList;
   import javax.swing.JOptionPane;
  import javax.swing.JScrollPane;
  import javax.swing.JTable;
  import javax.swing.ListSelectionModel;
  import javax.swing.SwingUtilities;
  import javax.swing.event.ListSelectionEvent;
  import javax.swing.event.ListSelectionListener;
  
  /**
   * Dialog for managing time window presets.
   * 
   * @author onoprien
   */
  public class PresetsDialog {
  
  // -- Private parts : ----------------------------------------------------------
      
      private final int VSPACE = 5;
      private final int HSPACE = 10;
      
      private final JScrollPane root;
      private final JButton editButton, deleteButton, newButton, okButton;
      private final JTable table;
      
      private final PresetList timeWindowList;
      private TimeSelection selectedTimeWindow;
  
  
  // -- Construction and initialization : ----------------------------------------
      
      private PresetsDialog(PresetList data) {
          
          timeWindowList = data;
          
          editButton = new JButton("Edit...");
          editButton.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                  TimeSelection ts = getSelectedPreset();
                  ts = TimeSelectionPanel.editTimeWindow(editButton, ts);
                  if (ts != null) {
                      timeWindowList.insert(ts);
                      setSelectedPreset(ts);
                  }
              }
          });
          
          deleteButton = new JButton("Delete");
          deleteButton.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                  TimeSelection ts = getSelectedPreset();
                  if (ts != null) timeWindowList.delete(ts);
              }
          });
          
          newButton = new JButton("New...");
          newButton.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                  TimeSelection ts = TimeSelectionPanel.editTimeWindow(newButton, null);
                  if (ts != null) {
                      timeWindowList.insert(ts);
                      setSelectedPreset(ts);
                  }
              }
          });
          
          okButton = new JButton("  OK  ");
          okButton.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                  selectedTimeWindow = getSelectedPreset();
                  Window w = SwingUtilities.getWindowAncestor(okButton);
                  if (w != null) w.setVisible(false);
              }
          });
          
          table = new JTable(timeWindowList);
          table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
              public void valueChanged(ListSelectionEvent e) {
                  TimeSelection ts = getSelectedPreset();
                  editButton.setEnabled(ts != null);
                  deleteButton.setEnabled(ts != null);
              }
          });
          
          
          root = new JScrollPane(table);
      }
      
  // -- Showing the dialog : -----------------------------------------------------
      
      /**
      * Displays the dialog for managing time window presets.
      * 
      * @param parent Parent component.
      * @param data List of presets known to the application.
      * @return Preset selected by the user, or <tt>null</tt> if no preset was selected or if the dialog was canceled.
      */
     static public TimeSelection managePresets(Component parent, PresetList data) {
         PresetsDialog dialog = new PresetsDialog(data);
         int out = JOptionPane.showOptionDialog(parent, dialog.root, "Trending Time Window Presets", 
                        JOptionPane.DEFAULT_OPTION, JOptionPane.PLAIN_MESSAGE, null, 
                        new JButton[] {dialog.editButton, dialog.deleteButton, dialog.newButton, dialog.okButton}, dialog.okButton);
         return dialog.selectedTimeWindow;
     }
     
     
 // -- Local methods : ----------------------------------------------------------
     
     private TimeSelection getSelectedPreset() {
         int index = table.getSelectedRow();
         return index == -1 ? null : timeWindowList.get(index);
     }
     
     private void setSelectedPreset(TimeSelection ts) {
         int index = timeWindowList.indexOf(ts);
         if (index == -1) {
             table.getSelectionModel().clearSelection();
         } else {
             table.getSelectionModel().setSelectionInterval(index, index);
         }
     }
 }