UiBinder + extending FlexTable

[mma]

Hi!

I'm currently trying to create a widget that extends FlexTable in way
the style of the row and column header cells (row=0 and col=0,
respectively) is different from the other (regular) cells.

In order to do this, i'm following the approach:
- Created TwoAxisFlexTable.java and TwoAxisFlexTable.ui.xml using the
eclipse plugin provided by google (code below)
- Changed the java file in order to extend FlexTable instead of
extending Composite (and erased the initwidget() part)
- Included a new xmlns in the ui.xml file in order to recognize the
TwoAxisFlexTable class from the java file
- Added a Style type in the ui.xml file and the respective interface
in java file

All is working fine, but the is code is breaking (null exception) when
I try to set the style.

I'm not an experienced programmer, so I imagine that the problem i'm
facing has a trivial solution...

Thanks,
M.

--- ui.xml ---

<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent";>
<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
        xmlns:g="urn:import:com.google.gwt.user.client.ui"
        xmlns:t="urn:import:com.mobeo.experiments.client.ui">

        <ui:style
type='com.mobeo.experiments.client.ui.TwoAxisFlexTable.Style'>
                .axisrow {border-bottom: solid thin grey; text-align: center;}
                .axiscol {border-right: solid thin grey; text-align: center;}
                .regular {text-align: center;}
        </ui:style>
        <g:HTMLPanel>
                <t:TwoAxisFlexTable></t:TwoAxisFlexTable>
        </g:HTMLPanel>
</ui:UiBinder>

-- java ---

package com.mobeo.experiments.client.ui;

import com.google.gwt.core.client.GWT;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.Widget;

public class TwoAxisFlexTable extends FlexTable {

        private static TwoAxisFlexTableUiBinder uiBinder = GWT.create
(TwoAxisFlexTableUiBinder.class);

        interface TwoAxisFlexTableUiBinder extends
                        UiBinder<Widget, TwoAxisFlexTable> {
        }


        interface Style extends CssResource {
                String axisrow();
                String axiscol();
            String regular();
          }


        @UiField Style style;

        public TwoAxisFlexTable() {
                super();
        }

        void color () {
                int rowsize = super.getRowCount();
                if (rowsize == 0) return;
                for (int row = 0; row < rowsize; row ++) {
                        int colsize = super.getCellCount(row);
                        System.out.println("Recoloring... row: " + row + " # 
col: " +
colsize);
                        if (colsize != 0) {
                                for (int col = 0; col < colsize; col ++) {
                                        System.out.println("Recoloring... row: 
" + row + " col: " + col);

                                  // CODE BREAKS IN THE STATEMENT
BELOW
                                        if (row == 0) 
getCellFormatter().setStyleName(row, col,
style.axisrow());
                                        else if (col == 0) 
getCellFormatter().setStyleName(row, col,
style.axiscol());
                                        else 
getCellFormatter().setStyleName(row, col, style.regular());
                                }
                        }
                }

        }

}



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