// The following shows a review rating-inputPreviewWidget w_review("review_input", "rating-input");w_review.add_attribute_value("submit-label", Variant("Send"));w_review.add_attribute_value("visible", Variant("review"));w_review.add_attribute_value("required", Variant("review"));std::string reply_label = "Reply";std::string max_chars_label = "140 characters max";w_review.add_attribute_value("review-label", Variant(reply_label + ": " + max_chars_label));widgets.emplace_back(w_review);
rating
// The follwing shows a rating rating-inputPreviewWidget w_rating("rating_input", "rating-input");w_rating.add_attribute_value("visible", Variant("rating"));w_rating.add_attribute_value("required", Variant("rating"));w_rating.add_attribute_value("rating-label", Variant("Please rate this"));widgets.emplace_back(w_rating);
运行我们的Scope，显示如下：
我们可以从上面看到一个review及rating的rating-input。
在上面我们可以看到当我们点击“Send”及输入我们的rating时，我们怎么获取他们的值，，并使用它们呢？为了这个目的，我们创建了一个新的类：
action.h
#ifndef SCOPE_ACTION_H_#define SCOPE_ACTION_H_#include <unity/scopes/ActionMetadata.h>#include <unity/scopes/ActivationQueryBase.h>#include <unity/scopes/ActivationResponse.h>#include <unity/scopes/Result.h>class Action : public unity::scopes::ActivationQueryBase{public:Action(unity::scopes::Result const& result,unity::scopes::ActionMetadata const& metadata,std::string const& action_id);~Action() = default;virtual unity::scopes::ActivationResponse activate() override;private:std::string const action_id_;};#endif // SCOPE_ACTION_H_
action.cpp
#include <scope/action.h>#include <unity/scopes/ActivationResponse.h>#include <unity/UnityExceptions.h>#include <QString>#include <QDebug>#include <iostream>namespace sc = unity::scopes;using namespace std;QString qstr_(std::string str){return QString::fromStdString(str);}Action::Action(const unity::scopes::Result &result,const unity::scopes::ActionMetadata &metadata,std::string const& action_id): sc::ActivationQueryBase(result, metadata),action_id_(action_id){qDebug() << "action id: " << qstr_(action_id_);}sc::ActivationResponse Action::activate(){QString review = QString("%1").arg(qstr_(action_metadata().scope_data().get_dict()["review"].get_string()));double rating = action_metadata().scope_data().get_dict()["rating"].get_double();qDebug() << "review: " << review;qDebug() << "rating: " << rating;sc::ActivationResponse done(sc::ActivationResponse::ShowDash);cerr << "activate called" << endl;return done;}
scope.cpp
sc::ActivationQueryBase::UPtr Scope::perform_action(sc::Result const& result,sc::ActionMetadata const& metadata,string const& widget_id,string const& action_id){cerr << "perform_action called" << endl;return sc::ActivationQueryBase::UPtr(new Action(result, metadata, action_id));}
使用action类，我们可以在按下按钮“Send”及改变星级rating输入后，我们可以看到如下的输出：
从上面的输出，我们可以看到所有的输出都可以被截获。我们可以利用它们并使用相应的API来更新我们网上的数据，比如点评中餐馆的评价。具体的使用实例请参考我的例程“在Ubuntu Scope中如何截获按钮事件并做我们想做的事情”。
整个项目的源码在：git clonehttps://gitcafe.com/ubuntu/scopetemplates_rating_input.git
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