Update HorizontalFielManager switch

how it could change the focus of the fields manually, IE go to a place you choose, because when the HFM is the emphasis placed on the first, but when you lose and go back this pass in last place

This is possible thanks to a custom handler that extends HorizontalFieldManager like this:

public class HFMWithMemory extends HorizontalFieldManager implements FocusChangeListener {
  private Field _lastFocused;

  protected void onDisplay() {
    if (getFocusListener() == null) {
      setFocusListener(this); // could do this in constructor as well
    }
  }

  public void focusChanged(Field field, int eventType) {
    switch (eventType) {
    case FOCUS_CHANGED:
      UiApplication.getUiApplication().invokeLater(new Runnable() {
        public void run() {
          _lastFocused = getFieldWithFocus();
        }
      });
      break;
    case FOCUS_GAINED:
      if (_lastFocused != null) {
        UiApplication.getUiApplication().invokeLater(new Runnable() {
          public void run() {
            _lastFocused.setFocus();
          }
        });
      }
      break;
    case FOCUS_LOST:
      break;
    default:
      break;
    }
  }
}

I have not tested the code, so there might be a few typos, but overall, it should work.

Tags: BlackBerry Developers

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