如何清除GWT CellTable上的用户输入？

Question

I have a CellTable<Price> table = new CellTable<Price>(); .

I also have a TextInputCell column:

        priceColumn = new Column<Price, String>(new TextInputCell()) {
            public String getValue(Price p) {
                if (p.getPrice() == 0)
                    return "";
                return p.getPrice()+"";
            }   
        };

Also I have a refresh button . If the button is pressed, then it basically reload all data from server and then set the data to the table.

When the table first time load data, it is fine. Let's say, a cell has price of 12 .

Then if I modify that cell to 11 (or whatever value other than 12) , then the 11 stays there forever. I mean, even if I press the refresh button , the cell's data will not change back to 12 , but still stay 11 .

How can I make the column / cell not remembering the user input?

Answer 1

After you received the new data and updated your objects with the new data call table.redraw();

Working example

final Price p1 = new Price(4);
final Price p2 = new Price(5);
final Price p3 = new Price(6);

final CellTable<Price> table = new CellTable<Price>();

Column<Price, String> priceColumn = new Column<Price, String>(new TextInputCell()) {
    public String getValue(Price p) {
    if (p.getPrice() == 0)
        return "";
    return p.getPrice() + "";
    }
};

ListDataProvider<Price> dataProvider = new ListDataProvider<Price>();
dataProvider.addDataDisplay(table);

List<Price> list = dataProvider.getList();
list.add(p1);
list.add(p2);
list.add(p3);

table.addColumn(priceColumn);

Button b = new Button("refresh");
b.addClickHandler(new ClickHandler() {

    @Override
    public void onClick(ClickEvent event) {
    // your refresh logic, update the items already loaded into the CellTable!
    p2.setPrice(1000);
    p3.setPrice(2000);

    table.redraw();
    }
});

RootPanel.get().add(table);
RootPanel.get().add(b);