protected final void doActionPerformed(ActionEvent evt) {
    try {
      ApplicationDiagram diag =
          (ApplicationDiagram) (ApplicationContext.getFocusManager().getFocusObject());
      Point clickPosition = getDiagramLocation(evt);
      if (clickPosition == null)
        clickPosition = GraphicUtil.rectangleGetCenter(diag.getMainView().getViewRect());
      java.awt.Image image = SRSystemClipboard.getClipboardImage();
      if (image == null) return;
      DbObject diagGo = diag.getDiagramGO();
      Db db = diagGo.getDb();

      ImageIcon icon = new ImageIcon(image);
      int imageHeigth = icon.getIconHeight();
      int imageWidth = icon.getIconWidth();

      db.beginTrans(Db.WRITE_TRANS, LocaleMgr.action.getString("pasteDiagramImage"));

      DbObject imageGo = diagGo.createComponent(DbGraphic.fImageGoDiagramImage.getMetaClass());
      imageGo.set(DbGraphic.fImageGoDiagramImage, image);
      imageGo.set(
          DbGraphic.fGraphicalObjectRectangle,
          new Rectangle(
              clickPosition.x - (imageWidth / 2),
              clickPosition.y - (imageHeigth / 2),
              imageWidth,
              imageHeigth));
      db.commitTrans();
    } catch (Exception e) {
      org.modelsphere.jack.util.ExceptionHandler.processUncatchedException(
          ApplicationContext.getDefaultMainFrame(), e);
    }
  }
  public final DynamicNode getDynamicNode(DbObject dbo, int which, boolean load)
      throws DbException {
    SrVector path = new SrVector(10);
    Db db = dbo.getDb();
    db.beginTrans(Db.READ_TRANS);
    while (dbo != null && !(dbo instanceof DbRoot)) {
      path.addElement(dbo);
      dbo = getDbParent(dbo, which);
    }
    if (db instanceof DbRAM) {
      if (DB_RAM != ((DynamicNode) getRoot()).getUserObject()) path.addElement(DB_RAM);
    } else path.addElement(db);

    DynamicNode nodeFound = (DynamicNode) getRoot();
    for (int i = path.size(); --i >= 0; ) {
      if (load) loadChildren(nodeFound);
      Object userObj = path.elementAt(i);
      dbo = null;
      DbObject dbParent = null;
      GroupParams group = GroupParams.defaultGroupParams;
      DynamicNode groupNode = null;
      DynamicNode node = null;
      if (userObj instanceof DbObject) {
        dbo = (DbObject) userObj;
        dbParent = getDbParent(dbo, which);
        group = getGroupParams(dbParent, dbo);
      }
      if (group.name == null) {
        node = getDynamicNode(nodeFound, userObj, 0);
      } else {
        groupNode = getGroupNode(nodeFound, group, 0);
        if (groupNode != null) node = getDynamicNode(groupNode, userObj, 0);
      }
      if (node == null && nodeFound.hasLoaded() && !nodeFound.isLeaf() && which == Db.NEW_VALUE) {

        SemanticalModel model = ApplicationContext.getSemanticalModel();
        boolean visible = model.isVisibleOnScreen(dbParent, dbo, Explorer.class);

        if (visible) {
          node = createPrimaryNode(dbParent, dbo);
          if (group.name == null) {
            insertNodeInto(node, nodeFound, getInsertionIndex(dbParent, dbo, nodeFound, node));
          } else {
            if (groupNode == null) {
              groupNode = createGroupNode(group);
              insertNodeInto(groupNode, nodeFound, getSortedIndex(nodeFound, groupNode));
            }
            insertNodeInto(node, groupNode, getInsertionIndex(dbParent, dbo, groupNode, node));
          }
        }
      }
      nodeFound = node;
      if (nodeFound == null) break;
    }
    db.commitTrans();
    return nodeFound;
  }
 private void insertProjects(SrVector children, Db db) throws DbException {
   db.beginTrans(Db.READ_TRANS);
   DbObject parent = db.getRoot();
   DbEnumeration dbEnum = parent.getComponents().elements(DbProject.metaClass);
   while (dbEnum.hasMoreElements())
     children.addElement(createPrimaryNode(parent, dbEnum.nextElement()));
   dbEnum.close();
   db.commitTrans();
 }
 // Called at the end of a cell edition, to process the edition result.
 public final void valueForPathChanged(TreePath path, Object newValue) {
   DynamicNode node = (DynamicNode) path.getLastPathComponent();
   Object obj = node.getRealObject();
   if (obj instanceof DbObject) {
     boolean editable = false;
     try {
       Db db = ((DbObject) obj).getDb();
       if (db.isValid()) {
         db.beginReadTrans();
         MetaField editableMetaField = getEditableMetaField((DbObject) obj);
         if (editableMetaField == null)
           editable =
               ApplicationContext.getSemanticalModel()
                   .isNameEditable((DbObject) obj, Explorer.class);
         else
           editable =
               ApplicationContext.getSemanticalModel()
                   .isEditable(editableMetaField, (DbObject) obj, Explorer.class);
         db.commitTrans();
       }
     } catch (DbException ex) {
       org.modelsphere.jack.util.ExceptionHandler.processUncatchedException(
           ApplicationContext.getDefaultMainFrame(), ex);
       editable = false;
     }
     if (!editable) return;
   } else {
     return;
   }
   DbObject semObj = (DbObject) obj;
   try {
     MetaField editableMetaField = getEditableMetaField(semObj);
     String transName =
         (editableMetaField == null
             ? LocaleMgr.action.getString("rename")
             : MessageFormat.format(kUpdate0, new Object[] {editableMetaField.getGUIName()}));
     semObj.getDb().beginTrans(Db.WRITE_TRANS, transName);
     if (editableMetaField == null) {
       if (semObj.getTransStatus() == Db.OBJ_REMOVED) return;
       semObj.setName((String) newValue);
     } else semObj.set(editableMetaField, (String) newValue);
     semObj.getDb().commitTrans();
     nodeChanged(node); // in case it is a secondary node (only the
     // primary node is updated by the refresh
     // listener).
   } catch (Exception ex) {
     org.modelsphere.jack.util.ExceptionHandler.processUncatchedException(
         ApplicationContext.getDefaultMainFrame(), ex);
   }
 }
  protected final void loadChildren(DynamicNode node) throws DbException {
    if (node.hasLoaded() || node.isLeaf()) return;
    node.setHasLoaded();
    Object userObject = node.getUserObject();
    if (userObject == ROOT) return;
    SrVector children = new SrVector(10);
    boolean isSorted = true;
    DbObject dbParent = null;
    if (userObject == DB_RAM) {
      Db[] dbs = Db.getDbs();
      for (int i = 0; i < dbs.length; i++) {
        if (dbs[i] instanceof DbRAM) insertProjects(children, dbs[i]);
      }
    } else if (userObject instanceof Db) {
      insertProjects(children, (Db) userObject);
    } else {
      dbParent = (DbObject) userObject;
      dbParent.getDb().beginTrans(Db.READ_TRANS);
      insertComponents(children, dbParent);
      isSorted = childrenAreSorted(dbParent);
      dbParent.getDb().commitTrans();
    }

    if (isSorted) {
      children.sort(getComparator(dbParent));
    }

    ArrayList groupNodeList = new ArrayList();
    DynamicNode groupNode = null;
    Enumeration enumeration = children.elements();
    while (enumeration.hasMoreElements()) {
      DynamicNode childNode = (DynamicNode) enumeration.nextElement();
      GroupParams group = childNode.getGroupParams();
      if (group.name == null) {
        node.add(childNode);
      } else {
        if (groupNode == null) {
          groupNode = createGroupNode(group);
          node.add(groupNode);
          groupNodeList.add(groupNode);
        } else if (!groupNode.toString().equals(group.name)) {
          boolean groupFound = false;
          for (int i = 0; i < groupNodeList.size(); i++) {
            groupNode = (DynamicNode) groupNodeList.get(i);
            if (groupNode.toString().equals(group.name)) {
              groupFound = true;
              break;
            }
          }
          if (!groupFound) {
            groupNode = createGroupNode(group);
            node.add(groupNode);
            groupNodeList.add(groupNode);
          }
        }
        groupNode.add(childNode);
      }
    }
    groupNodeList.clear();
  }
 /**
  * If CS application, create a root node with 2 subnodes: RAM and repository; the RAM subnode
  * contains the list of RAM projects as subnodes. If RAM application, create a root node with the
  * list of projects as subnodes.
  */
 private DynamicNode createRootNode() {
   DynamicNode rootNode = null;
   DynamicNode RAMNode = null;
   try {
     RAMNode = new DynamicNode(DB_RAM);
     RAMNode.setDisplayText(DbRAM.DISPLAY_NAME);
     RAMNode.setIcon(kLocalIcon);
     loadChildren(RAMNode);
     Db[] dbs = Db.getDbs();
     for (int i = 0; i < dbs.length; i++) {
       if (dbs[i] instanceof DbRAM) continue;
       if (rootNode == null) {
         rootNode = new DynamicNode(ROOT);
         rootNode.setHasLoaded();
         rootNode.add(RAMNode);
       }
       DynamicNode dbNode = new DynamicNode(dbs[i]);
       dbNode.setDisplayText(dbs[i].getDBMSName());
       dbNode.setIcon(kRepositoryIcon);
       rootNode.add(dbNode);
       loadChildren(dbNode);
     }
   } catch (DbException ex) {
     org.modelsphere.jack.util.ExceptionHandler.processUncatchedException(
         ApplicationContext.getDefaultMainFrame(), ex);
   }
   return (rootNode != null ? rootNode : RAMNode);
 }
 public Explorer() {
   super(new DynamicNode(ROOT));
   PropertiesSet preferences = PropertiesManager.getPreferencePropertiesSet();
   if (preferences != null) {
     preferences.addPrefixPropertyChangeListener(
         DisplayToolTipsOptionGroup.class,
         DisplayToolTipsOptionGroup.TOOLTIPS_FIELD_VISIBILITY_PREFIX,
         new PreferencesListener());
     Db.addDbListener(dbslistener);
     tooltipsFields.addAll(Arrays.asList(DisplayToolTipsOptionGroup.getAvailableMetaFields()));
   }
 }
  protected final void refresh(DynamicNode parentNode) throws DbException {
    if (ApplicationContext.getFocusManager().isGuiLocked()) return;

    if (parentNode == null) return;
    if (!parentNode.hasLoaded() || parentNode.isLeaf()) {
      if (parentNode.getUserObject() instanceof DbObject)
        updateNode((DbObject) parentNode.getUserObject());
      return;
    }
    Object userObject = parentNode.getUserObject();
    if (userObject == ROOT) {
      int count = getChildCount(parentNode);
      for (int i = 0; i < count; i++) {
        DynamicNode node = (DynamicNode) getChild(parentNode, i);
        userObject = node.getUserObject();
        if (userObject == DB_RAM) refresh(node);
        else {
          if (((Db) userObject).isValid()) {
            ((Db) userObject).beginTrans(Db.READ_TRANS);
            refresh(node);
            ((Db) userObject).commitTrans();
          } else {
            removeNode(node);
          }
        }
      }
      return;
    }
    if (userObject == DB_RAM) {
      int count = getChildCount(parentNode);
      for (int i = count - 1; i >= 0; i--) {
        DynamicNode node = (DynamicNode) getChild(parentNode, i);
        Db db = ((DbObject) node.getUserObject()).getDb();
        if (!db.isValid()) {
          removeNode(node);
          continue;
        }
        db.beginTrans(Db.READ_TRANS);
        refresh(node);
        // refresh the display text for the projects - we do not want to
        // apply a full update
        // using update(dbo) because we want to preserve the expanded
        // state for projects.
        node.setDisplayText(getDisplayText(null, (DbObject) node.getUserObject()));
        db.commitTrans();
      }
      // check for missing Db
      Db[] dbs = Db.getDbs();
      for (int i = 0; i < dbs.length; i++) {
        if (!dbs[i].isValid() || !(dbs[i] instanceof DbRAM)) continue;
        DynamicNode dbNode = getDynamicNode(parentNode, dbs[i], 0);
        if (dbNode != null) continue;
        dbs[i].beginTrans(Db.READ_TRANS);
        DbEnumeration dbEnum = dbs[i].getRoot().getComponents().elements(DbProject.metaClass);
        if (dbEnum.hasMoreElements()) {
          getDynamicNode(dbEnum.nextElement(), false);
        }
        dbEnum.close();
        dbs[i].commitTrans();
      }
      return;
    }

    SrVector children = new SrVector(10);
    if (userObject instanceof Db) {
      insertProjects(children, (Db) userObject);
      children.sort();
    } else if (((DbObject) userObject).isAlive()) {
      insertComponents(children, (DbObject) userObject);
      if (childrenAreSorted((DbObject) userObject))
        children.sort(getComparator((DbObject) userObject));
    }

    DynamicNode groupNode = null;
    int index = 0;
    int iGroup = 0;
    for (int i = 0; i < children.size(); i++) {
      DynamicNode srcNode = (DynamicNode) children.elementAt(i);
      GroupParams group = srcNode.getGroupParams();
      if (group.name == null) {
        refreshNode(srcNode, parentNode, index);
        index++;
      } else {
        if (groupNode == null || !groupNode.toString().equals(group.name)) {
          if (groupNode != null) deleteNodes(groupNode, iGroup);
          groupNode = getGroupNode(parentNode, group, index);
          if (groupNode == null) {
            groupNode = createGroupNode(group);
            insertNodeInto(groupNode, parentNode, index);
          } else if (groupNode != getChild(parentNode, index)) {
            removeNodeFromParent(groupNode);
            insertNodeInto(groupNode, parentNode, index);
          }
          index++;
          iGroup = 0;
        }
        refreshNode(srcNode, groupNode, iGroup);
        iGroup++;
      }
    }
    if (groupNode != null) deleteNodes(groupNode, iGroup);
    deleteNodes(parentNode, index);

    // Refresh subnodes in a separate pass to avoid interference from
    // automatic
    // adding of a primary node when adding a secondary node.
    refreshChildren(parentNode);
  }