How to use GWT 2.1 Data Presentation Widgets

Question

At the 2010 Google IO it was announced that GWT 2.1 would include new Data Presentation Widgets. 2.1M is available for download, and presumably the widgets are included, but

Answer 1

I have a working prototype of an editable CellTable. The prototype has a Table displaying String, Boolean, Date, Integer columns with editors for each. Editing each cell updates the corresponding model.

public class CellTableDemo implements EntryPoint
{
    public void onModuleLoad( )
    {
        CellTable cellTable = createTable( );

        addColumns( cellTable );

        ListViewAdapter listViewAdapter = new ListViewAdapter( );
        listViewAdapter.setList( getData( ) );
        listViewAdapter.addView( cellTable );

        RootPanel.get( ).add( new SimplePager( cellTable, SimplePager.TextLocation.CENTER ) );
        RootPanel.get( ).add( cellTable );
    }

    private CellTable createTable( )
    {
        CellTable cellTable = new CellTable( );
        cellTable.setSelectionEnabled( true );
        cellTable.setSelectionModel( new SingleSelectionModel( ) );
        cellTable.setPageSize( 5 );
        cellTable.setPageStart( 0 );
        return cellTable;
    }

    private void addColumns( CellTable cellTable )
    {
        Column colA = new Column( new TextInputCell( ) )
        {
            public String getValue( SomeDTO object )
            {
                return object.getA( );
            }
        };
        colA.setFieldUpdater( new FieldUpdater( ) // updates changes into the backing bean
                {
                    public void update( int index, SomeDTO object, String value )
                    {
                        object.setA( value );
                    }
                } );
        cellTable.addColumn( colA, "String Column A" );

        cellTable.addColumn( new Column( new CurrencyCell( ) )
        {
            public Integer getValue( SomeDTO object )
            {
                return object.getB( );
            }
        }, "Currency Column B" );

        Column colC = new Column( new CheckboxCell( ) )
        {
            public Boolean getValue( SomeDTO object )
            {
                return object.getC( );
            }
        };
        colC.setFieldUpdater( new FieldUpdater( )
        {
            public void update( int index, SomeDTO object, Boolean value )
            {
                object.setC( value );
            }
        } );
        cellTable.addColumn( colC, "Boolean Column C" );

        Column colD = new Column( new DatePickerCell( ) )
        {
            public Date getValue( SomeDTO object )
            {
                return object.getD( );
            }
        };
        colD.setFieldUpdater( new FieldUpdater( )
        {
            public void update( int index, SomeDTO object, Date value )
            {
                object.setD( value );
            }
        } );
        cellTable.addColumn( colD, "Date Column D" );

        cellTable.addColumn( new Column( new ActionCell( "Click of summary of this row", new Delegate( )
        {
            public void execute( String row )
            {
                Window.alert( row );
            }
        } ) )
        {
            public String getValue( SomeDTO row )
            {
                return row.getSummary( );
            }
        } );
    }

    private ArrayList getData( )
    {
        ArrayList tableData = new ArrayList( );
        tableData.add( new SomeDTO( "A", 10, true, new Date( ) ) );
        tableData.add( new SomeDTO( "AA", 200, false, new Date( ) ) );
        tableData.add( new SomeDTO( "AAA", 3000, true, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAA", 40, false, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAA", 500, true, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAAA", 6000, false, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAAAA", 70, true, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAAAAA", 800, false, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAAAAAA", 9000, true, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAAAAAAA", 10, false, new Date( ) ) );
        tableData.add( new SomeDTO( "AAAAAAAAAAA", 11, true, new Date( ) ) );
        return tableData;
    }

    public class SomeDTO
    {
        private String a;
        private Integer b;
        private Boolean c;
        private Date d;

        public SomeDTO( String a, Integer b, Boolean c, Date d )
        {
            this.a = a;
            this.b = b;
            this.c = c;
            this.d = d;
        }

        public String getA( )
        {
            return a;
        }

        public void setA( String a )
        {
            this.a = a;
        }

        public Integer getB( )
        {
            return b;
        }

        public void setB( Integer b )
        {
            this.b = b;
        }

        public Boolean getC( )
        {
            return c;
        }

        public void setC( Boolean c )
        {
            this.c = c;
        }

        public Date getD( )
        {
            return d;
        }

        public void setD( Date d )
        {
            this.d = d;
        }

        public String getSummary( )
        {
            return getA( ) + "  " + getB( ) + "  " + getC( ) + "  " + getD( );
        }

    }

}