QtNetwork用法(二)之使用QT实现360的ctrl+ctrl功能
头文件描述:
<span style="font-size:18px;">#ifndef GOOGLESUGGEST_H #define GOOGLESUGGEST_H #include <QtGui> #include <QtNetwork> #include <QObject> QT_BEGIN_NAMESPACE class QLineEdit; class QNetworkReply; class QTimer; class QTreeWidget; QT_END_NAMESPACE //! [1] class GSuggestCompletion : public QObject { Q_OBJECT public: GSuggestCompletion(QLineEdit *parent = 0); ~GSuggestCompletion(); bool eventFilter(QObject *obj, QEvent *ev); void showCompletion(const QStringList &choices, const QStringList &hits); public slots: void doneCompletion(); void preventSuggest(); void autoSuggest(); void handleNetworkData(QNetworkReply *networkReply); private: QLineEdit *editor; QTreeWidget *popup; QTimer *timer; QNetworkAccessManager networkManager; }; //! [1] #endif // GOOGLESUGGEST_H</span>
源代码:
<span style="font-size:18px;">//made by davidsu33 //2014-10-10 //QT的googlesuggest的改造版本 //将其改造为360的搜索 //使用工具QNetwork模块, boost的属性树以及typeof //! [1] #include "googlesuggest.h" #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/json_parser.hpp> #include <boost/typeof/typeof.hpp> #include <boost/foreach.hpp> #include <sstream> //#include <iosfwd> #include <QRegExp> //常规浏览器查找 URL http://sug.so.360.cn/suggest?callback=suggest_so&encodein=utf-8&encodeout=utf-8&format=json&fields=word,obdata&word=m #define GSUGGEST_URL "http://sug.so.360.cn/suggest?callback=suggest_so&encodein=utf-8&encodeout=utf-8&format=json&fields=word,obdata&word=%1" //#define GSUGGEST_URL "http://google.com/complete/search?output=toolbar&q=%1" //! [1] //! [2] GSuggestCompletion::GSuggestCompletion(QLineEdit *parent): QObject(parent), editor(parent) { popup = new QTreeWidget; popup->setWindowFlags(Qt::Popup); popup->setFocusPolicy(Qt::NoFocus); popup->setFocusProxy(parent); popup->setMouseTracking(true); popup->setColumnCount(2); popup->setUniformRowHeights(true); popup->setRootIsDecorated(false); popup->setEditTriggers(QTreeWidget::NoEditTriggers); popup->setSelectionBehavior(QTreeWidget::SelectRows); popup->setFrameStyle(QFrame::Box | QFrame::Plain); popup->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); popup->header()->hide(); popup->installEventFilter(this); connect(popup, SIGNAL(itemClicked(QTreeWidgetItem*,int)), SLOT(doneCompletion())); timer = new QTimer(this); timer->setSingleShot(true); timer->setInterval(500); connect(timer, SIGNAL(timeout()), SLOT(autoSuggest())); connect(editor, SIGNAL(textEdited(QString)), timer, SLOT(start())); connect(&networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(handleNetworkData(QNetworkReply*))); } //! [2] //! [3] GSuggestCompletion::~GSuggestCompletion() { delete popup; } //! [3] //! [4] bool GSuggestCompletion::eventFilter(QObject *obj, QEvent *ev) { if (obj != popup) return false; if (ev->type() == QEvent::MouseButtonPress) { popup->hide(); editor->setFocus(); return true; } if (ev->type() == QEvent::KeyPress) { bool consumed = false; int key = static_cast<QKeyEvent*>(ev)->key(); switch (key) { case Qt::Key_Enter: case Qt::Key_Return: doneCompletion(); consumed = true; case Qt::Key_Escape: editor->setFocus(); popup->hide(); consumed = true; case Qt::Key_Up: case Qt::Key_Down: case Qt::Key_Home: case Qt::Key_End: case Qt::Key_PageUp: case Qt::Key_PageDown: break; default: editor->setFocus(); editor->event(ev); popup->hide(); break; } return consumed; } return false; } //! [4] //! [5] void GSuggestCompletion::showCompletion(const QStringList &choices, const QStringList &hits) { if (choices.isEmpty() || choices.count() != hits.count()) return; const QPalette &pal = editor->palette(); QColor color = pal.color(QPalette::Disabled, QPalette::WindowText); popup->setUpdatesEnabled(false); popup->clear(); for (int i = 0; i < choices.count(); ++i) { QTreeWidgetItem * item; item = new QTreeWidgetItem(popup); item->setText(0, choices[i]); item->setText(1, hits[i]); item->setTextAlignment(1, Qt::AlignRight); item->setTextColor(1, color); } popup->setCurrentItem(popup->topLevelItem(0)); popup->resizeColumnToContents(0); popup->resizeColumnToContents(1); popup->adjustSize(); popup->setUpdatesEnabled(true); int h = popup->sizeHintForRow(0) * qMin(7, choices.count()) + 3; popup->resize(popup->width(), h); popup->move(editor->mapToGlobal(QPoint(0, editor->height()))); popup->setFocus(); popup->show(); } //! [5] //! [6] void GSuggestCompletion::doneCompletion() { timer->stop(); popup->hide(); editor->setFocus(); QTreeWidgetItem *item = popup->currentItem(); if (item) { editor->setText(item->text(0)); QMetaObject::invokeMethod(editor, "returnPressed"); } } //! [6] //! [7] void GSuggestCompletion::autoSuggest() { //UTF-8的编码 QString str = editor->text(); QString url = QString(GSUGGEST_URL).arg(str); QUrl suggesturl(url); //suggesturl.setEncodedUrl(url.toAscii()); //suggesturl.setHost("http://sug.so.360.cn/"); QString strPath = suggesturl.encodedPath(); QString strQuery = suggesturl.encodedQuery(); QNetworkRequest req; req.setUrl(suggesturl); //req.setRawHeader("Accept", "application/javascript, */*;q=0.8"); //req.setRawHeader("Referer", "http://www.so.com/"); //req.setRawHeader("Accept-Language", "zh-CN"); //req.setRawHeader("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"); //req.setRawHeader("Accept-Encoding", "gzip, deflate"); //req.setRawHeader("Host", "sug.so.360.cn"); //req.setRawHeader("Cookie","__huid=10X%2FLQOe%2B%2FDQlxBkH8JUO9HzQNDDQ5t9e2HqTqhs2HUlw%3D; __guid=132730903.1687894815517624600.1412906141457.4387"); networkManager.get(req); //Accept: application/javascript, */*;q=0.8 //Referer: http://www.so.com/ //Accept-Language: zh-CN //User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0) //Accept-Encoding: gzip, deflate } //! [7] //! [8] void GSuggestCompletion::preventSuggest() { timer->stop(); } //! [8] //! [9] void GSuggestCompletion::handleNetworkData(QNetworkReply *networkReply) { QUrl url = networkReply->url(); QNetworkReply::NetworkError nerror = networkReply->error(); if (!networkReply->error()) { //解析jason数据,UTF-8编码 QStringList choices; QStringList hits; QByteArray response(networkReply->readAll()); QString strResponse(response); QString strResponse2 = QString::fromUtf8(response.data(), response.size()); QString strResponse3 = QString::fromAscii(response.data(), response.size()); qDebug()<<strResponse; QRegExp exp("\\s*suggest_so\\((.+)\\);"); int pos = exp.indexIn(strResponse); QStringList capTexts = exp.capturedTexts(); assert(capTexts[1].size() > 0); std::wstring wdata = strResponse.toStdWString(); qDebug()<<wdata.c_str(); qDebug()<<capTexts[1]; wdata = capTexts[1].toStdWString(); //处理成json数据的标准格式 std::wstringstream wstream(wdata); boost::property_tree::wptree pt; try { <strong><span style="color:#ff0000;"> //之前这里崩溃报错 expected array,是因为输入的数据不是标准的json格式 //需要将其规则标准化 boost::property_tree::read_json<boost::property_tree::wptree>(wstream, pt);</span></strong> } catch (const boost::property_tree::json_parser_error& e ) { qDebug()<<"what 's "<<e.what(); qDebug()<<"message:"<<e.message().c_str(); assert(false); } QString aline, alinesecond, aword; std::wstring query_object = pt.get<std::wstring>(L"query"); //BOOST_FOREACH(boost::property_tree::wptree::value_type &child, pt.get_child(L"result")) //{ //} BOOST_AUTO(child, pt.get_child(L"result")); for (BOOST_AUTO(it, child.begin()); it != child.end(); ++it) { <strong><span style="color:#ff0000;"> //get_child的键值对,其second仍然是一颗树 //aline = QString::fromStdWString(it->first.data()); //alinesecond = QString::fromStdWString(it->second.data());//ERROR //aword = QString::fromStdWString(it->get<std::wstring>(L"word"));//ERROR boost::property_tree::wptree& childparse = it->second; aword = QString::fromStdWString(childparse.get<std::wstring>(L"word")); qDebug()<<aword; choices<<aword; hits<<QString::null;</span></strong> } //QXmlStreamReader xml(response); //while (!xml.atEnd()) { // xml.readNext(); // if (xml.tokenType() == QXmlStreamReader::StartElement) // if (xml.name() == "suggestion") { // QStringRef str = xml.attributes().value("data"); // choices << str.toString(); // } // if (xml.tokenType() == QXmlStreamReader::StartElement) // if (xml.name() == "num_queries") { // QStringRef str = xml.attributes().value("int"); // hits << str.toString(); // } //} showCompletion(choices, hits); } networkReply->deleteLater(); } //! [9] </span>效果图:
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