我在昨天的文章中介绍了我设计的优酷Scope。在今天的练习中，我将对它的模版做一些小的改动，利用模版中的attributes项使得它的显示更加生动。
如果感兴趣的朋友，可以在如下的地址下载最新的youku scope:
git clonehttps://gitcafe.com/ubuntu/youku_keywords.git
首先，我们在query.cpp中对它的模版做如下的改动：
query.cpp
const std::string NORMAL_TEMPLATE = R"({ "schema-version": 1, "template": {"category-layout": "grid","card-size": "medium","overlay": false }, "components": {"title": "title","subtitle": "subtitle","art" : {"field": "art","aspect-ratio": 2.0},"attributes": {"field": "attributes","max-count": 2} }})";
在这个模版中，我们添加了如下的项：
"attributes": {"field": "attributes","max-count": 2}
我们可以利用这个项来显示一些我们所感兴趣的东西。query.cpp
void Query::do_normal_search(sc::SearchReplyProxy const& reply) {try {// Start by getting information about the queryconst sc::CannedQuery &query(sc::SearchQueryBase::query());// Get the query stringstring query_string = query.query_string();// Populate current weather category// the Client is the helper class that provides the results// without mixing APIs and scopes code.// Add your code to retreive xml, json, or any other kind of result// in the client.Client::DataList datalist;datalist = client_.getData(query_string);CategoryRenderer rdrGrid(NORMAL_TEMPLATE);auto grid = reply->register_category("youku", "Normal", "", rdrGrid);for (const Client::Data &data : datalist) {CategorisedResult catres(grid);catres.set_uri(data.link);catres.set_title(data.title);catres.set_art(data.image);QString likes = QString("%1 %2").arg(qstr(u8"\u261d "),qstr(data.up_count));QString views = QString("%1 %2").arg(qstr(u8" \u261f "),qstr(data.down_count));std::string both = qstr("%1 %2").arg(likes,views).toStdString();sc::VariantBuilder builder;builder.add_tuple({{"value", Variant(both)}});builder.add_tuple({{"value", Variant("")}});catres["attributes"] = builder.end();// Push the resultif (!reply->push(catres)) {// If we fail to push, it means the query has been cancelled.// So don't continue;return;}}} catch (domain_error &e) {// Handle exceptions being thrown by the client APIcerr << e.what() << endl;reply->error(current_exception());}
在上面，我们添加了如下的句子：
QString likes = QString("%1 %2").arg(qstr(u8"\u261d "),qstr(data.up_count));QString views = QString("%1 %2").arg(qstr(u8" \u261f "),qstr(data.down_count));std::string both = qstr("%1 %2").arg(likes,views).toStdString();sc::VariantBuilder builder;builder.add_tuple({{"value", Variant(both)}});builder.add_tuple({{"value", Variant("")}});catres["attributes"] = builder.end();这里的2个字符表示的是特定的字符（向上和向下的手势）。通过这样的改动，，我们可以得到如下的显示：
从上面的图片中可以看出来，对于每部视频的下面，多了一项显示有多少人喜欢，有多少人讨厌这部视频。
整个项目的源码在: git clonehttps://gitcafe.com/ubuntu/youku_attributes.git
多对自己说“我能行，我一定可以”，
