How to fix the Column Ordering issue when Insert and Remove columns in GWT?

I have a cellTable that has many columns like the followings:

OrderID - OrderDate - OrderTime - Name .....  1 - 2012-01-05 - 11:12:12 - Tom......   

Each column will have a checkBox for Hide/Unhide column:

[x] orderID (CheckBox)  [x] orderDate (CheckBox)  [x] orderTime (CheckBox)  ......  

Requirement: I want that when users uncheck the CheckBox the corresponding column will disappear & when they check the CheckBox, the column will appear in the CORRECT ORDER as at the beginning. This is the code:

public void insertColumn(int beforeIndex, TextColumn<String[]> textColumn, String columnName){      if(getView().getOrderListCellTable().getColumnIndex(textColumn)==-1){          getView().getOrderListCellTable().insertColumn(beforeIndex,textColumn, columnName);          textColumn.setSortable(true);      }  }  public void removeColumn(TextColumn<String[]> textColumn){      int index= getView().getOrderListCellTable().getColumnIndex(textColumn);        if(index!=-1){          getView().getOrderListCellTable().removeColumn(index);      }  }  

However, I got this issue, when I hide / unhinde just 1 column then the order is OK, ex, hide orderDate column then the table will be like this:

OrderID - OrderTime - Name .....  1 - 11:12:12 - Tom......   

And ofcourse, when unhiding orderDate then it will go back to the beginning correctly.

Code to insert/remove orderDate

    getView().getOrderDateCheckBox().addClickHandler(new ClickHandler(){            @Override          public void onClick(ClickEvent event)       {                 if(getView().getOrderDateCheckBox().getValue()){                        insertColumn(1, orderDateColumn,"Order Date");              }              else{                  removeColumn(orderDateColumn);              }          }        });  

But if I hide both orderID & OrderDate & then unhide orderDate then it will be like this:

OrderTime - OrderDate - Name .....  11:12:12 - 2012-01-05 - Tom......   

This is not right cos he orderDate should be stand before orderTime. This cos I insertColumn(1, orderDateColumn,"Order Date"); at position 1 (before index).

Can you figure out a logic to fix this issue?

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