void ToolBarAreaImpl::restoreLayout(const YamlMappingPtr layout)
{
    if(DEBUG_MODE){
        cout << "ToolBarAreaImpl::restoreLayout()" << endl;
    }

    if(isBeforeDoingInitialLayout){
        initialLayout = layout;
        return;
    }
       
    const YamlMappingPtr layoutOfToolBars = layout->findMapping("layoutOfToolBars");
    if(!layoutOfToolBars->isValid()){
        layoutToolBars();
        return;
    }
    
    // make the map from name to toolBar
    typedef map<QString, ToolBar*> ToolBarMap;
    ToolBarMap toolBarMap;
    for(size_t i=0; i < toolBarRows.size(); ++i){
        ToolBarList& toolBars = toolBarRows[i]->toolBars;
        for(ToolBarList::iterator q = toolBars.begin(); q != toolBars.end(); ++q){
            ToolBar* toolBar = *q;
            toolBarMap[toolBar->windowTitle()] = toolBar;
        }
    }
    toolBarRows.clear();

    for(size_t i=0; i < newToolBars.size(); ++i){
        toolBarMap[newToolBars[i]->windowTitle()] = newToolBars[i];
        newToolBars[i]->setParent(self);
    }
    newToolBars.clear();

    const YamlSequence* rows = layoutOfToolBars->get("rows").toSequence();

    for(int i=0; i < rows->size(); ++i){
        ToolBarRowPtr row(new ToolBarRow(self));
        toolBarRows.push_back(row);
        const YamlSequence* bars = rows->get(i).toSequence();
        for(int j=0; j < bars->size(); ++j){
            const YamlMapping* state = bars->get(j).toMapping();
            ToolBarMap::iterator it = toolBarMap.find(QString(state->get("name").toString().c_str()));
            if(it != toolBarMap.end()){
                ToolBar* toolBar = it->second;
                toolBarMap.erase(it);
                row->toolBars.push_back(toolBar);
                toolBar->desiredX = state->get("x").toInt();
                toolBar->layoutPriority = state->get("priority").toInt();
            }
        }
        if(row->toolBars.empty()){
            toolBarRows.pop_back();
        }
    }

    for(ToolBarMap::iterator p = toolBarMap.begin(); p != toolBarMap.end(); ++p){
        newToolBars.push_back(p->second);
    }

    layoutToolBars();
}