How to save last group field (GroupingView) after refresh browser page?

[Vadim Kolesnikov]

Hi all!
The grouping column is hidden, if you refresh browser page then group rows is reset, but the grouping column will be hidden. Please, i need help.

Before refresh:
before_refresh.jpg

After refresh:
after_refresh.jpg

Example: http://www.sencha.com/examples/#grouping
You deleted row for "store.groupBy("industry");" and you will see this trouble ^
How to save last group field (GroupingView) after refresh browser page or recover the hidden column?

- GXT version: 2.2.5
- Host mode / web mode / both: All
- Browser and version: All
- Operating System: Windows 7

[Vadim Kolesnikov]

I did the following:
override methods (GroupingView):

private void onGroupByClick(MenuEvent me, int colIndex) {
   groupingStore.groupBy(cm.getDataIndex(colIndex));
   grid.getState().put("lastGroupField", getGroupField()); // write to grid state
}

    @Override
    protected String renderRows(int startRow, int endRow) {
      String groupField = getGroupField();
      boolean eg = groupField != null;
      if (!showGroupedColumn) {
          ...
          grid.getState().put("lastGroupField", groupField); // write to grid state 
      }
      return super.renderRows(startRow, endRow);
}

and add to grid listener:

grid.addListener(Events.Attach, new Listener<GridEvent<Post>>() {

          @Override
          public void handleEvent(GridEvent<Post> be) {
                 ...
                 Map<String, Object> state = grid.getState();
                 ...
                 if (state.containsKey("lastGroupField")) {
                        store.groupBy((String) grid.getState().get("lastGroupField"));
                 }
                 loader.load(config);
          }
        });

How it is right? I don't know