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  package org.apache.cayenne.modeler.editor.dbentity;
  
  import org.apache.cayenne.map.Attribute;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.map.DbRelationship;
  import org.apache.cayenne.map.Entity;
  import org.apache.cayenne.map.Relationship;
  import org.apache.cayenne.modeler.Application;
  import org.apache.cayenne.modeler.ProjectController;
  import org.apache.cayenne.modeler.action.ActionManager;
  import org.apache.cayenne.modeler.action.RemoveAttributeAction;
  import org.apache.cayenne.modeler.action.RemoveRelationshipAction;
  import org.apache.cayenne.modeler.event.AttributeDisplayEvent;
  import org.apache.cayenne.modeler.event.DbAttributeDisplayListener;
  import org.apache.cayenne.modeler.event.DbEntityDisplayListener;
  import org.apache.cayenne.modeler.event.DbRelationshipDisplayListener;
  import org.apache.cayenne.modeler.event.EntityDisplayEvent;
  import org.apache.cayenne.modeler.event.RelationshipDisplayEvent;
  
  import javax.swing.JScrollPane;
  import javax.swing.JTabbedPane;
  import javax.swing.event.ChangeEvent;
  import javax.swing.event.ChangeListener;
  import java.awt.Component;
  
  public class DbEntityTabbedView extends JTabbedPane implements ChangeListener,
          DbEntityDisplayListener, DbRelationshipDisplayListener,
          DbAttributeDisplayListener {
  
      protected ProjectController projectController;
  
      protected Component entityPanel;
      protected DbEntityAttributeRelationshipTab attributeRelationshipTab;
  
      public DbEntityTabbedView(ProjectController projectController) {
          super();
          this.projectController = projectController;
  
          initView();
          initController();
      }
  
      private void initView() {
          setTabPlacement(JTabbedPane.TOP);
  
          // add panels to tabs
          // note that those panels that have no internal scrollable tables
          // must be wrapped in a scroll pane
  
          entityPanel = new JScrollPane(new DbEntityTab(projectController));
          addTab("Entity", entityPanel);
  
          attributeRelationshipTab = new DbEntityAttributeRelationshipTab(projectController);
          addTab("Properties", attributeRelationshipTab);
  
      }
  
      private void initController() {
          projectController.addDbEntityDisplayListener(this);
          projectController.addDbAttributeDisplayListener(this);
          projectController.addDbRelationshipDisplayListener(this);
  
          addChangeListener(this);
      }
  
      /** Reset the remove buttons */
      private void resetRemoveButtons() {
          ActionManager actionManager = Application.getInstance().getActionManager();
  
          actionManager.getAction(RemoveAttributeAction.class).setEnabled(false);
          actionManager.getAction(RemoveRelationshipAction.class).setEnabled(false);
      }
  
      /** Handle focus when tab changes. */
      public void stateChanged(ChangeEvent e) {
          resetRemoveButtons();
          projectController.setEntityTabSelection(getSelectedIndex());
      }
  
      /** If entity is null hides it's contents, otherwise makes it visible. */
      public void currentDbEntityChanged(EntityDisplayEvent e) {
          Entity entity = e.getEntity();
  
          if (e.isMainTabFocus() && entity instanceof DbEntity) {
              if (getSelectedComponent() != entityPanel) {
                  setSelectedComponent(entityPanel);
                  entityPanel.setVisible(true);
              }
          }
  
          resetRemoveButtons();
          setVisible(e.getEntity() != null);
  
          if (projectController.getEntityTabSelection() < getTabCount()) {
              setSelectedIndex(projectController.getEntityTabSelection());
          }
      }
  
      public void currentDbRelationshipChanged(RelationshipDisplayEvent e) {
          if (e.getEntity() == null) {
              return;
          }
  
          // update relationship selection
          Relationship[] rels = e.getRelationships();
          DbRelationship[] dbRels = new DbRelationship[rels.length];
  
          System.arraycopy(rels, 0, dbRels, 0, rels.length);
  
          // reset tab to relationship
          if (getSelectedComponent() != attributeRelationshipTab.getSplitPane().getComponent(1) && dbRels.length > 0) {
              setSelectedComponent(attributeRelationshipTab);
              attributeRelationshipTab.getSplitPane().getComponent(1).setVisible(true);
          }
  
          ((DbEntityRelationshipPanel) attributeRelationshipTab.getSplitPane().getComponent(1)).selectRelationships(dbRels);
          attributeRelationshipTab.updateActions(dbRels);
      }
  
      public void currentDbAttributeChanged(AttributeDisplayEvent e) {
          if (e.getEntity() == null)
              return;
  
          // update attribute selection
          Attribute<?,?,?>[] attrs = e.getAttributes();
          DbAttribute[] dbAttrs = new DbAttribute[attrs.length];
  
          System.arraycopy(attrs, 0, dbAttrs, 0, attrs.length);
  
          if (getSelectedComponent() != attributeRelationshipTab.getSplitPane().getComponent(0) && dbAttrs.length > 0) {
              setSelectedComponent(attributeRelationshipTab);
              attributeRelationshipTab.getSplitPane().getComponent(0).setVisible(true);
          }
  
          ((DbEntityAttributePanel) attributeRelationshipTab.getSplitPane().getComponent(0)).selectAttributes(dbAttrs);
          attributeRelationshipTab.updateActions(dbAttrs);
      }
  
      public DbEntityAttributeRelationshipTab getAttributeRelationshipTab() {
          return attributeRelationshipTab;
      }
  }
  