private void layoutPanel() {
    if (myUsagePreviewPanel != null) {
      Disposer.dispose(myUsagePreviewPanel);
    }
    removeAll();
    JScrollPane pane = ScrollPaneFactory.createScrollPane(myTree);

    if (isPreview()) {
      pane.setBorder(IdeBorderFactory.createBorder(SideBorder.LEFT | SideBorder.RIGHT));

      boolean vertical =
          myToolWindow.getAnchor() == ToolWindowAnchor.LEFT
              || myToolWindow.getAnchor() == ToolWindowAnchor.RIGHT;
      Splitter splitter =
          new Splitter(
              vertical, UsageViewSettings.getInstance().PREVIEW_USAGES_SPLITTER_PROPORTIONS);
      splitter.setFirstComponent(pane);
      myUsagePreviewPanel = new UsagePreviewPanel(myProject, new UsageViewPresentation());
      myUsagePreviewPanel.setBorder(IdeBorderFactory.createBorder(SideBorder.LEFT));

      Disposer.register(this, myUsagePreviewPanel);
      splitter.setSecondComponent(myUsagePreviewPanel);
      add(splitter, BorderLayout.CENTER);
    } else {
      pane.setBorder(IdeBorderFactory.createBorder(SideBorder.LEFT));
      add(pane, BorderLayout.CENTER);
    }

    add(createToolbar().getComponent(), BorderLayout.WEST);

    myTree.getParent().setBackground(UIManager.getColor("Tree.background"));

    revalidate();
  }
 protected JComponent createCenterPanel() {
   JScrollPane scrollPane = ScrollPaneFactory.createScrollPane(myTree);
   scrollPane.setBorder(IdeBorderFactory.createBorder(SideBorder.LEFT));
   myCenterPanel.add(CARD_STATUS, scrollPane);
   myTreeBrowser =
       new CommittedChangesTreeBrowser(myProject, Collections.<CommittedChangeList>emptyList());
   Disposer.register(this, myTreeBrowser);
   myTreeBrowser.setHelpId(getHelpId());
   myCenterPanel.add(CARD_CHANGES, myTreeBrowser);
   return myCenterPanel;
 }
  public JComponent createCenterPanel() {
    List<FileStructureFilter> fileStructureFilters = new ArrayList<FileStructureFilter>();
    List<FileStructureNodeProvider> fileStructureNodeProviders =
        new ArrayList<FileStructureNodeProvider>();
    if (myTreeActionsOwner != null) {
      for (Filter filter : myBaseTreeModel.getFilters()) {
        if (filter instanceof FileStructureFilter) {
          final FileStructureFilter fsFilter = (FileStructureFilter) filter;
          myTreeActionsOwner.setActionIncluded(fsFilter, true);
          fileStructureFilters.add(fsFilter);
        }
      }

      if (myBaseTreeModel instanceof ProvidingTreeModel) {
        for (NodeProvider provider : ((ProvidingTreeModel) myBaseTreeModel).getNodeProviders()) {
          if (provider instanceof FileStructureNodeProvider) {
            fileStructureNodeProviders.add((FileStructureNodeProvider) provider);
          }
        }
      }
    }
    final JPanel panel = new JPanel(new BorderLayout());
    JPanel comboPanel = new JPanel(new GridLayout(0, 2, 0, 0));

    final Shortcut[] F4 =
        ActionManager.getInstance()
            .getAction(IdeActions.ACTION_EDIT_SOURCE)
            .getShortcutSet()
            .getShortcuts();
    final Shortcut[] ENTER = CustomShortcutSet.fromString("ENTER").getShortcuts();
    final CustomShortcutSet shortcutSet = new CustomShortcutSet(ArrayUtil.mergeArrays(F4, ENTER));
    new AnAction() {
      public void actionPerformed(AnActionEvent e) {
        final boolean succeeded = navigateSelectedElement();
        if (succeeded) {
          unregisterCustomShortcutSet(panel);
        }
      }
    }.registerCustomShortcutSet(shortcutSet, panel);

    new AnAction() {
      public void actionPerformed(AnActionEvent e) {
        if (mySpeedSearch != null && mySpeedSearch.isPopupActive()) {
          mySpeedSearch.hidePopup();
        } else {
          myPopup.cancel();
        }
      }
    }.registerCustomShortcutSet(CustomShortcutSet.fromString("ESCAPE"), myTree);

    new ClickListener() {
      @Override
      public boolean onClick(MouseEvent e, int clickCount) {
        navigateSelectedElement();
        return true;
      }
    }.installOn(myTree);

    for (FileStructureFilter filter : fileStructureFilters) {
      addCheckbox(comboPanel, filter);
    }

    for (FileStructureNodeProvider provider : fileStructureNodeProviders) {
      addCheckbox(comboPanel, provider);
    }
    myPreferredWidth = Math.max(comboPanel.getPreferredSize().width, 350);
    panel.add(comboPanel, BorderLayout.NORTH);
    JScrollPane scrollPane = ScrollPaneFactory.createScrollPane(myAbstractTreeBuilder.getTree());
    scrollPane.setBorder(IdeBorderFactory.createBorder(SideBorder.TOP | SideBorder.BOTTOM));
    panel.add(scrollPane, BorderLayout.CENTER);
    panel.add(createSouthPanel(), BorderLayout.SOUTH);
    DataManager.registerDataProvider(
        panel,
        new DataProvider() {
          @Override
          public Object getData(@NonNls String dataId) {
            if (PlatformDataKeys.PROJECT.is(dataId)) {
              return myProject;
            }
            if (LangDataKeys.PSI_ELEMENT.is(dataId)) {
              final Object node =
                  ContainerUtil.getFirstItem(myAbstractTreeBuilder.getSelectedElements());
              if (!(node instanceof FilteringTreeStructure.FilteringNode)) return null;
              return getPsi((FilteringTreeStructure.FilteringNode) node);
            }
            if (LangDataKeys.POSITION_ADJUSTER_POPUP.is(dataId)) {
              return myPopup;
            }
            if (PlatformDataKeys.TREE_EXPANDER.is(dataId)) {
              return myTreeExpander;
            }
            return null;
          }
        });

    return panel;
  }
  public VcsDependentHistoryComponents getUICustomization(
      final VcsHistorySession session, JComponent forShortcutRegistration) {
    final ColumnInfo[] columns;
    final Consumer<VcsFileRevision> listener;
    final JComponent addComp;
    if (((MyHistorySession) session).isSupports15()) {
      final MergeSourceColumnInfo mergeSourceColumn =
          new MergeSourceColumnInfo((MyHistorySession) session);
      columns = new ColumnInfo[] {new CopyFromColumnInfo(), mergeSourceColumn};

      final JTextArea field = new JTextArea();
      field.setEditable(false);
      field.setBackground(UIUtil.getComboBoxDisabledBackground());
      field.setWrapStyleWord(true);
      listener =
          new Consumer<VcsFileRevision>() {
            public void consume(VcsFileRevision vcsFileRevision) {
              field.setText(mergeSourceColumn.getText(vcsFileRevision));
            }
          };
      final JPanel panel = new JPanel(new GridBagLayout());
      final GridBagConstraints gb =
          new GridBagConstraints(
              0,
              0,
              1,
              1,
              0,
              0,
              GridBagConstraints.WEST,
              GridBagConstraints.NONE,
              new Insets(0, 0, 0, 0),
              0,
              0);

      final JLabel mergeLabel = new JLabel("Merge Sources:");
      final MergeSourceDetailsAction sourceAction = new MergeSourceDetailsAction();
      sourceAction.registerSelf(forShortcutRegistration);
      final DefaultActionGroup group = new DefaultActionGroup();
      group.add(sourceAction);
      final JComponent toolbar =
          ActionManager.getInstance()
              .createActionToolbar(ActionPlaces.UNKNOWN, group, true)
              .getComponent();

      panel.add(mergeLabel, gb);
      ++gb.gridx;
      gb.insets.left = 10;
      gb.anchor = GridBagConstraints.NORTHWEST;
      panel.add(toolbar, gb);

      ++gb.gridy;
      gb.insets.left = 0;
      gb.gridx = 0;
      gb.gridwidth = 2;
      gb.weightx = gb.weighty = 1;
      gb.fill = GridBagConstraints.BOTH;
      JScrollPane pane = ScrollPaneFactory.createScrollPane(field);
      pane.setBorder(IdeBorderFactory.createBorder(SideBorder.LEFT | SideBorder.TOP));
      panel.add(pane, gb);
      addComp = panel;
    } else {
      columns = new ColumnInfo[] {new CopyFromColumnInfo()};
      addComp = null;
      listener = null;
    }
    return new VcsDependentHistoryComponents(columns, listener, addComp);
  }