Метод getParent () не определен для типа new DropTargetAdapter () {}

Question

Мне нужен номер строки для перетаскивания строк таблицы. Я решил это в другом проекте с Control и toControl с позицией. у event.item Tabelitem не было getSelectionIndex ()

, но теперь я получил ошибку - метод getParent () не определен для типа new DropTargetAdapter () {} - и я не нашелпричина

package table;
import org.eclipse.swt.SWT;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DragSource;
import org.eclipse.swt.dnd.DragSourceAdapter;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DropTarget;
import org.eclipse.swt.dnd.DropTargetAdapter;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;




public class DragDropTable {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());

    Table table = new Table(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
    Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
    DragSource source = new DragSource(table, DND.DROP_MOVE | DND.DROP_COPY);
    String[] buff = new String[2];
    source.setTransfer(types);

    source.addDragListener(new DragSourceAdapter() {
      public void dragSetData(DragSourceEvent event) {
        // Get the selected items in the drag source
        DragSource ds = (DragSource) event.widget;
        Table table = (Table) ds.getControl();
        TableItem[] selection = table.getSelection();
        System.out.println("Zeile Tabelle " + table.getSelectionIndex());

        for (int a=0; a<table.getColumnCount(); a++) {
            buff[a]=selection[0].getText(a);
        }
        table.remove(table.getSelectionIndex());
        event.data = buff.toString();
      }
    });
    // Create the drop target
    DropTarget target = new DropTarget(table, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);
    target.setTransfer(types);
    target.addDropListener(new DropTargetAdapter() {
      public void dragEnter(DropTargetEvent event) {
        if (event.detail == DND.DROP_DEFAULT) {
          event.detail = (event.operations & DND.DROP_COPY) != 0 ? DND.DROP_COPY : DND.DROP_NONE;
        }
        // Allow dropping text only
        for (int i = 0, n = event.dataTypes.length; i < n; i++) {
          if (TextTransfer.getInstance().isSupportedType(event.dataTypes[i])) {
            event.currentDataType = event.dataTypes[i];
          }
        }
      }
      public void dragOver(DropTargetEvent event) {
         event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
      }
      public void drop(DropTargetEvent event) {
        if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
          // Get the dropped data
          DropTarget target = (DropTarget) event.widget;
          Table table = (Table) target.getControl();
          String data = (String) event.data;
          TableItem item = (TableItem) event.item;
          System.out.println("row Ziel " + table.getSelectionIndex());
          Control absolut = getParent().getDisplay().getFocusControl();
          int row=1;
          if (item != null){
              row =  getColumn(table,event.x + absolut.toControl(item.getBounds(0).x,item.getBounds(0).y).x);
          }
          TableItem insert = new TableItem(table, SWT.NONE, row);
          insert.setText(0, buff[0]);
          insert.setText(1, buff[1]);
          table.redraw();
        }
      }
    });
    TableColumn column = new TableColumn(table, SWT.NONE);
    TableColumn tblclmnNewColumn = new TableColumn(table, SWT.NONE);
    column.setWidth(100);
    tblclmnNewColumn.setWidth(100);
    // Seed the table
    TableItem item = new TableItem(table, SWT.NONE);
    item.setText(0,"A");
    item.setText(1,"AA");
    item = new TableItem(table, SWT.NONE);
    item.setText(0,"B");
    item.setText(1,"BB");
    item = new TableItem(table, SWT.BORDER);
    item.setText(0,"C");
    item.setText(1,"CC");
    item = new TableItem(table, SWT.BORDER);
    item.setText(0,"D");
    item.setText(1,"DD");
    item = new TableItem(table, SWT.BORDER);
    item.setText(0,"E");
    item.setText(1,"EE");
    //column.pack();

    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
  }
  private static int getColumn(Table table, int x)
  {
      int overallWidth = 0;

      for(int i = 0; i < table.getColumnCount(); i++)
      {
          overallWidth += table.getColumn(i).getWidth();
          System.out.println("overallWidth "+ overallWidth);
          if(x < overallWidth)
          {
              return i;
          }
      }

      return -1;
  }
}