grid=new Grid<JobModel>(store, cm);
grid.setLoadMask(true);
grid.getView().setForceFit(true);
grid.addCellDoubleClickHandler(new CellDoubleClickHandler() {
public void onCellClick(CellDoubleClickEvent event) {
int row=event.getRowIndex();
JobModel model=grid.getStore().get(row);
if(model!=null){
TreeNodeSelectEvent te=new TreeNodeSelectEvent(TreeKeyProviderTool.genJobProviderKey(model.getId()));