reverted fix for IDEA-121089 Rearrange watches in Debug toolwindow with drag-and-drop (it disables DnD from editor)

java/debugger/impl/src/com/intellij/debugger/ui/impl/MainWatchPanel.java

@@ -46,12 +46,9 @@ import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.SystemInfo;
 import com.intellij.ui.*;
 import com.intellij.ui.border.CustomLineBorder;
-import com.intellij.util.ui.EditableModel;
 import com.intellij.xdebugger.impl.actions.XDebuggerActions;
 
 import javax.swing.*;
-import javax.swing.tree.MutableTreeNode;
-import javax.swing.tree.TreeNode;
 import java.awt.*;
 import java.awt.datatransfer.DataFlavor;
 import java.awt.event.KeyEvent;
@@ -136,8 +133,6 @@ public class MainWatchPanel extends WatchPanel implements DataProvider {
       public void updateDraggedImage(final Image image, final Point dropPoint, final Point imageOffset) {
       }
     }, myTree);
-
-    RowsDnDSupport.install(myTree, new WatchesDnDModel());
   }
 
   private void addWatchesFrom(final DebuggerTreeNodeImpl[] nodes) {
@@ -258,31 +253,4 @@ public class MainWatchPanel extends WatchPanel implements DataProvider {
       new AnActionEvent(null, context, ActionPlaces.DEBUGGER_TOOLBAR, presentation, ActionManager.getInstance(), 0);
     action.actionPerformed(actionEvent);
   }
-
-  private class WatchesDnDModel implements EditableModel {
-    private final DebuggerTreeNodeImpl root = (DebuggerTreeNodeImpl) myTree.getModel().getRoot();
-
-    @Override
-    public void exchangeRows(int oldIndex, int newIndex) {
-      myTree.saveState();
-      root.insert((MutableTreeNode)root.getChildAt(getIndexInRoot(oldIndex)), getIndexInRoot(newIndex));
-      myTree.treeChanged();
-    }
-
-    @Override
-    public boolean canExchangeRows(int oldIndex, int newIndex) {
-      return getIndexInRoot(oldIndex) != -1 && getIndexInRoot(newIndex) != -1;
-    }
-
-    private int getIndexInRoot(int row) {
-      TreeNode component = (TreeNode)myTree.getPathForRow(row).getLastPathComponent();
-      return root.getIndex(component);
-    }
-
-    @Override
-    public void addRow() {}
-
-    @Override
-    public void removeRow(int idx) {}
-  }
 }