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    1   package net.sourceforge.pmd.util.viewer.gui;
    2
    3   import net.sourceforge.pmd.ast.SimpleNode;
    4   import net.sourceforge.pmd.util.viewer.model.ViewerModel;
    5   import net.sourceforge.pmd.util.viewer.model.ViewerModelEvent;
    6   import net.sourceforge.pmd.util.viewer.model.ViewerModelListener;
    7
    8   import javax.swing.*;
    9   import javax.swing.event.ListSelectionEvent;
    10  import javax.swing.event.ListSelectionListener;
    11  import java.awt.BorderLayout;
    12  import java.util.Vector;
    13
    14  /***
    15   * A panel showing XPath expression evaluation results
    16   *
    17   * @author Boris Gruschko ( boris at gruschko.org )
    18   * @version $Id: EvaluationResultsPanel.java,v 1.11 2006/02/10 14:15:31 tomcopeland Exp $
    19   */
    20  public class EvaluationResultsPanel extends JPanel implements ViewerModelListener {
    21      private ViewerModel model;
    22      private JList list;
    23
    24      /***
    25       * constructs the panel
    26       *
    27       * @param model model to refer to
    28       */
    29      public EvaluationResultsPanel(ViewerModel model) {
    30          super(new BorderLayout());
    31
    32          this.model = model;
    33
    34          init();
    35      }
    36
    37      private void init() {
    38          model.addViewerModelListener(this);
    39
    40          list = new JList();
    41          list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    42
    43          list.addListSelectionListener(new ListSelectionListener() {
    44              public void valueChanged(ListSelectionEvent e) {
    45                  if (list.getSelectedValue() != null) {
    46                      model.selectNode((SimpleNode) list.getSelectedValue(), EvaluationResultsPanel.this);
    47                  }
    48              }
    49          });
    50
    51          add(new JScrollPane(list), BorderLayout.CENTER);
    52      }
    53
    54      /***
    55       * @see ViewerModelListener#viewerModelChanged(ViewerModelEvent)
    56       */
    57      public void viewerModelChanged(ViewerModelEvent e) {
    58          switch (e.getReason()) {
    59              case ViewerModelEvent.PATH_EXPRESSION_EVALUATED:
    60
    61                  if (e.getSource() != this) {
    62                      list.setListData(new Vector(model.getLastEvaluationResults()));
    63                  }
    64
    65                  break;
    66
    67              case ViewerModelEvent.CODE_RECOMPILED:
    68                  list.setListData(new Vector(0));
    69
    70                  break;
    71          }
    72      }
    73  }