sorting celltable data with image

[lucky]

Hi,

I have a requirement that i need to sort celltable data with image, and also when i click on the image i need sort the data again.
Currently i am using the following code:
it will display image but i am not able to sort the data when i click on the image(Like down Arrow and UPArrow)

I am using gwt 2.4

Below is the code snippet:

 
   TextColumn<ResultProxy> nameColumn = new TextColumn<ResultProxy>() {
          @Override
          public String getValue(ResultProxy object) {
            return object.getName();
          }
        };
        resultListGrid.addColumn(nameColumn, "Name");

        nameColumn.setSortable(true);
  
  
   ListHandler<Proxy> columnSortHandler = new ListHandler<ResultProxy>(
                resultGrid);
            columnSortHandler.setComparator(nameColumn,
                new Comparator<ResultProxy>() {
                  public int compare(ResultProxy o1, ResultProxy o2) {
                    if (o1 == o2) {
                      return 0;
                    }

                    // Compare the name columns.
                    if (o1 != null) {
                      return (o2 != null) ? o1.getName().compareTo(o2.getName()) : 1;
                    }
                    return -1;
                  }
                });
            resultListGrid.addColumnSortHandler(columnSortHandler);
           resultListGrid.getColumnSortList().push(nameColumn);

Let me know do i need to any thing more?

[lucky]

Can any one help me on this?

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