qt5base-lts/examples/embedded/flightinfo/flightinfo.cpp

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/****************************************************************************
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#include <QtCore>
2011-05-08 07:13:40 +00:00
#include <QtWidgets>
#include <QtNetwork>
#include "ui_form.h"
#define FLIGHTVIEW_URL "http://mobile.flightview.com/TrackByFlight.aspx"
#define FLIGHTVIEW_RANDOM "http://mobile.flightview.com/TrackSampleFlight.aspx"
// strips all invalid constructs that might trip QXmlStreamReader
static QString sanitized(const QString &xml)
{
QString data = xml;
// anything up to the html tag
int i = data.indexOf("<html");
if (i > 0)
data.remove(0, i - 1);
// everything inside the head tag
i = data.indexOf("<head");
if (i > 0)
data.remove(i, data.indexOf("</head>") - i + 7);
// invalid link for JavaScript code
while (true) {
i = data.indexOf("onclick=\"gotoUrl(");
if (i < 0)
break;
data.remove(i, data.indexOf('\"', i + 9) - i + 1);
}
// all inline frames
while (true) {
i = data.indexOf("<iframe");
if (i < 0)
break;
data.remove(i, data.indexOf("</iframe>") - i + 8);
}
// entities
data.remove("&nbsp;");
data.remove("&copy;");
return data;
}
class FlightInfo : public QMainWindow
{
Q_OBJECT
private:
Ui_Form ui;
QUrl m_url;
QDate m_searchDate;
QPixmap m_map;
QNetworkAccessManager m_manager;
QList<QNetworkReply *> mapReplies;
public:
FlightInfo(QMainWindow *parent = 0): QMainWindow(parent) {
QWidget *w = new QWidget(this);
ui.setupUi(w);
setCentralWidget(w);
ui.searchBar->hide();
ui.infoBox->hide();
connect(ui.searchButton, SIGNAL(clicked()), SLOT(startSearch()));
connect(ui.flightEdit, SIGNAL(returnPressed()), SLOT(startSearch()));
setWindowTitle("Flight Info");
// Rendered from the public-domain vectorized aircraft
// http://openclipart.org/media/people/Jarno
m_map = QPixmap(":/aircraft.png");
QAction *searchTodayAction = new QAction("Today's Flight", this);
QAction *searchYesterdayAction = new QAction("Yesterday's Flight", this);
QAction *randomAction = new QAction("Random Flight", this);
connect(searchTodayAction, SIGNAL(triggered()), SLOT(today()));
connect(searchYesterdayAction, SIGNAL(triggered()), SLOT(yesterday()));
connect(randomAction, SIGNAL(triggered()), SLOT(randomFlight()));
connect(&m_manager, SIGNAL(finished(QNetworkReply*)),
this, SLOT(handleNetworkData(QNetworkReply*)));
addAction(searchTodayAction);
addAction(searchYesterdayAction);
addAction(randomAction);
setContextMenuPolicy(Qt::ActionsContextMenu);
}
private slots:
void handleNetworkData(QNetworkReply *networkReply) {
if (!networkReply->networkError()) {
if (!mapReplies.contains(networkReply)) {
// Assume UTF-8 encoded
QByteArray data = networkReply->readAll();
QString xml = QString::fromUtf8(data);
digest(xml);
} else {
mapReplies.removeOne(networkReply);
m_map.loadFromData(networkReply->readAll());
update();
}
}
networkReply->deleteLater();
}
void today() {
QDateTime timestamp = QDateTime::currentDateTime();
m_searchDate = timestamp.date();
searchFlight();
}
void yesterday() {
QDateTime timestamp = QDateTime::currentDateTime();
timestamp = timestamp.addDays(-1);
m_searchDate = timestamp.date();
searchFlight();
}
void searchFlight() {
ui.searchBar->show();
ui.infoBox->hide();
ui.flightStatus->hide();
ui.flightName->setText("Enter flight number");
ui.flightEdit->setFocus();
#ifdef QT_KEYPAD_NAVIGATION
ui.flightEdit->setEditFocus(true);
#endif
m_map = QPixmap();
update();
}
void startSearch() {
ui.searchBar->hide();
QString flight = ui.flightEdit->text().simplified();
if (!flight.isEmpty())
request(flight, m_searchDate);
}
void randomFlight() {
request(QString(), QDate::currentDate());
}
public slots:
void request(const QString &flightCode, QDate date) {
setWindowTitle("Loading...");
QString code = flightCode.simplified();
QString airlineCode = code.left(2).toUpper();
QString flightNumber = code.mid(2, code.length());
ui.flightName->setText("Searching for " + code);
QUrlQuery query;
query.addQueryItem("view", "detail");
query.addQueryItem("al", airlineCode);
query.addQueryItem("fn", flightNumber);
query.addQueryItem("dpdat", date.toString("yyyyMMdd"));
m_url = QUrl(FLIGHTVIEW_URL);
m_url.setQuery(query);
if (code.isEmpty()) {
// random flight as sample
m_url = QUrl(FLIGHTVIEW_RANDOM);
ui.flightName->setText("Getting a random flight...");
}
m_manager.get(QNetworkRequest(m_url));
}
private:
void digest(const QString &content) {
setWindowTitle("Flight Info");
QString data = sanitized(content);
// do we only get the flight list?
// we grab the first leg in the flight list
// then fetch another URL for the real flight info
int i = data.indexOf("a href=\"?view=detail");
if (i > 0) {
QString href = data.mid(i, data.indexOf('\"', i + 8) - i + 1);
QRegularExpression regex("dpap=([A-Za-z0-9]+)");
QRegularExpressionMatch match = regex.match(href);
QString airport = match.captured(1);
QUrlQuery query(m_url);
query.addQueryItem("dpap", airport);
m_url.setQuery(query);
m_manager.get(QNetworkRequest(m_url));
return;
}
QXmlStreamReader xml(data);
bool inFlightName = false;
bool inFlightStatus = false;
bool inFlightMap = false;
bool inFieldName = false;
bool inFieldValue = false;
QString flightName;
QString flightStatus;
QStringList fieldNames;
QStringList fieldValues;
while (!xml.atEnd()) {
xml.readNext();
if (xml.tokenType() == QXmlStreamReader::StartElement) {
QStringRef className = xml.attributes().value("class");
inFlightName |= xml.name() == "h1";
inFlightStatus |= className == "FlightDetailHeaderStatus";
inFlightMap |= className == "flightMap";
if (xml.name() == "td" && !className.isEmpty()) {
if (className.contains("fieldTitle")) {
inFieldName = true;
fieldNames += QString();
fieldValues += QString();
}
if (className.contains("fieldValue"))
inFieldValue = true;
}
if (xml.name() == "img" && inFlightMap) {
const QByteArray encoded
= ("http://mobile.flightview.com/" % xml.attributes().value("src")).toLatin1();
QUrl url = QUrl::fromPercentEncoding(encoded);
mapReplies.append(m_manager.get(QNetworkRequest(url)));
}
}
if (xml.tokenType() == QXmlStreamReader::EndElement) {
inFlightName &= xml.name() != "h1";
inFlightStatus &= xml.name() != "div";
inFlightMap &= xml.name() != "div";
inFieldName &= xml.name() != "td";
inFieldValue &= xml.name() != "td";
}
if (xml.tokenType() == QXmlStreamReader::Characters) {
if (inFlightName)
flightName += xml.text();
if (inFlightStatus)
flightStatus += xml.text();
if (inFieldName)
fieldNames.last() += xml.text();
if (inFieldValue)
fieldValues.last() += xml.text();
}
}
if (fieldNames.isEmpty()) {
QString code = ui.flightEdit->text().simplified().left(10);
QString msg = QString("Flight %1 is not found").arg(code);
ui.flightName->setText(msg);
return;
}
ui.flightName->setText(flightName);
flightStatus.remove("Status: ");
ui.flightStatus->setText(flightStatus);
ui.flightStatus->show();
QStringList whiteList;
whiteList << "Departure";
whiteList << "Arrival";
whiteList << "Scheduled";
whiteList << "Takeoff";
whiteList << "Estimated";
whiteList << "Term-Gate";
QString text;
text = QString("<table width=%1>").arg(width() - 25);
for (int i = 0; i < fieldNames.count(); i++) {
QString fn = fieldNames[i].simplified();
if (fn.endsWith(':'))
fn = fn.left(fn.length() - 1);
if (!whiteList.contains(fn))
continue;
QString fv = fieldValues[i].simplified();
bool special = false;
special |= fn.startsWith("Departure");
special |= fn.startsWith("Arrival");
text += "<tr>";
if (special) {
text += "<td align=center colspan=2>";
text += "<b><font size=+1>" + fv + "</font></b>";
text += "</td>";
} else {
text += "<td align=right>";
text += fn;
text += " : ";
text += "&nbsp;";
text += "</td>";
text += "<td>";
text += fv;
text += "</td>";
}
text += "</tr>";
}
text += "</table>";
ui.detailedInfo->setText(text);
ui.infoBox->show();
}
void resizeEvent(QResizeEvent *event) {
Q_UNUSED(event);
ui.detailedInfo->setMaximumWidth(width() - 25);
}
void paintEvent(QPaintEvent *event) {
QMainWindow::paintEvent(event);
QPainter p(this);
p.fillRect(rect(), QColor(131, 171, 210));
if (!m_map.isNull()) {
int x = (width() - m_map.width()) / 2;
int space = ui.infoBox->pos().y();
if (!ui.infoBox->isVisible())
space = height();
int top = ui.titleBox->height();
int y = qMax(top, (space - m_map.height()) / 2);
p.drawPixmap(x, y, m_map);
}
p.end();
}
};
#include "flightinfo.moc"
int main(int argc, char **argv)
{
Q_INIT_RESOURCE(flightinfo);
QApplication app(argc, argv);
FlightInfo w;
w.resize(360, 504);
w.show();
return app.exec();
}