Rendering checkbox in treegrid

[jazzer]

Two questions: 1) I'm trying to figure out how to use a renderer for a checkbox in a treegrid. I want to hide the checkbox at the parent levels. I'm trying this but it doesn't work - the check box renders in one of the children but not the others.

Is there a better way to do this?

CheckColumnConfig checkColumn = new CheckColumnConfig(template.isAutoLogOn.toString(), "AUTOLOG?", 60);
final CheckBox cb = new CheckBox();
checkColumn.setRenderer(new GridCellRenderer<ModelData>(){
@Override public Object render(ModelData model, String property,
ColumnData config, int rowIndex, int colIndex,
ListStore<ModelData> store, Grid<ModelData> grid) {

if (model.get("type").equals("resource")) {
cb.setVisible(false);
return cb;
}
else {
cb.setVisible(true);
return cb;
}
}
});
CellEditor checkBoxEditor = new CellEditor(cb);
checkColumn.setEditor(checkBoxEditor);
columns.add(checkColumn);

Question 2) Is there a good example of how to render fields in the parent row based on data in the child rows? If the user updates a child row, I want to update the parent without having to round trip data to the server.

Thanks!

[gald]

i thing i did something similar to your question 1.
first i make a class to overrhide CheckColumnConfig.onRender

public class myCheckColumnConfig extends CheckColumnConfig
{

   public myCheckColumnConfig (String id, String name, int width)
   {
      super(id, name, width);
   }

   protected String onRender(ModelData model, String property, ColumnData config, int rowIndex, int colIndex, ListStore<ModelData> store)
   {
      if (model instanceof myModel)
      {
         config.css = "x-grid3-check-col-td";
         return "<div class='x-grid3-check-col" + " x-grid3-check-col" + getCheckState(model, property, rowIndex, colIndex) + " x-grid3-cc-"
               + getId() + "'>&#160;</div>";
      }
      return "";
   }
}

and then i use id in my column config

      ColumnConfig cc= new myCheckColumnConfig("toto", "Toto", 75);
      CellEditor checkBoxEditor = new CellEditor(new CheckBox());
      cc.setEditor(checkBoxEditor);
      cc.add(cc);