Re: Change text of buttonCell in celltable

On Monday, November 5, 2012 7:53:59 PM UTC+1, Deepak Singh wrote:

Let's say you have some object that stores "pending requests". To make things simple, let's use a Set<HotelSearchDTO>:

final Set<HotelSearchDTO> pendingRequests = new HashSet<HotelSearchDTO>();

Column<HotelSearchDTO, String> bookCol = new Column<HotelSearchDTO, String>(new ButtonCell()) {

@Override

public String getValue(HotelSearchDTO object) {

return "Normal";

return pendingRequests.contains(object) ? "Loading…" : "Normal";

 

}

}; 

bookCol.setFieldUpdater(new FieldUpdater<HotelSearchDTO, String>() {

@Override

public void update(int index, HotelSearchDTO object, String value) {

// How to return "Loading..." from this place as this is the only place to handle click event.

if (pendingRequest.add(object)) {

  // remember, add returns 'true' if the obejct wasn't already there; that filters out the case when the user clicks on "Loading…" buttons

  // Now, do the request, and in the callback make sure you remove the HotelSearchDTO from the pendingRequests set and redraw the line

  foo.do(new SomeCallback() {

    …

    void onSuccessOrFailure() {

      pendingRequests.remove(object);

      cellTable.redrawRow(index); // you'd better re-compute the index here, in case the table has changed pending the response from the server

    }

  });

  // finally, redraw the line so the button now says "Loading…"

  cellTable.redrawRow(index);

 

}

});

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