QtNetwork说明（两）使用QT实现360的ctrl+ctrl特征

<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>

<span style="font-size:18px;">//made by davidsu33
//2014-10-10
//QT的googlesuggest的改造版本号
//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。是由于输入的数据不是标准的json格式
//须要将其规则标准化
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>