Import the flight info example.

Originally it was published in Qt Labs:
http://labs.trolltech.com/blogs/2009/07/26/track-your-flight-with-qts60/

Reviewed-by: Jason Barron

1 files changed, 415 insertions, 0 deletions

diff --git a/demos/embedded/flightinfo/flightinfo.cpp b/demos/embedded/flightinfo/flightinfo.cpp
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+++ b/demos/embedded/flightinfo/flightinfo.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore>
+#include <QtGui>
+#include <QtNetwork>
+
+#if defined (Q_OS_SYMBIAN)
+#include "sym_iap_util.h"
+#endif
+
+#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;
+
+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");
+        QTimer::singleShot(0, this, SLOT(delayedInit()));
+
+        // 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()));
+#if defined(Q_OS_SYMBIAN)
+        menuBar()->addAction(searchTodayAction);
+        menuBar()->addAction(searchYesterdayAction);
+        menuBar()->addAction(randomAction);
+#else
+        addAction(searchTodayAction);
+        addAction(searchYesterdayAction);
+        addAction(randomAction);
+        setContextMenuPolicy(Qt::ActionsContextMenu);
+#endif
+    }
+
+private slots:
+    void delayedInit() {
+#if defined(Q_OS_SYMBIAN)
+        qt_SetDefaultIap();
+#endif
+    }
+
+
+    void handleNetworkData(QNetworkReply *networkReply) {
+        if (!networkReply->error()) {
+            // Assume UTF-8 encoded
+            QByteArray data = networkReply->readAll();
+            QString xml = QString::fromUtf8(data);
+            digest(xml);
+        }
+        networkReply->deleteLater();
+        networkReply->manager()->deleteLater();
+    }
+
+    void handleMapData(QNetworkReply *networkReply) {
+        if (!networkReply->error()) {
+            m_map.loadFromData(networkReply->readAll());
+            update();
+        }
+        networkReply->deleteLater();
+        networkReply->manager()->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");
+        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, const 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);
+
+        m_url = QUrl(FLIGHTVIEW_URL);
+        m_url.addEncodedQueryItem("view", "detail");
+        m_url.addEncodedQueryItem("al", QUrl::toPercentEncoding(airlineCode));
+        m_url.addEncodedQueryItem("fn", QUrl::toPercentEncoding(flightNumber));
+        m_url.addEncodedQueryItem("dpdat", QUrl::toPercentEncoding(date.toString("yyyyMMdd")));
+
+        if (code.isEmpty()) {
+            // random flight as sample
+            m_url = QUrl(FLIGHTVIEW_RANDOM);
+            ui.flightName->setText("Getting a random flight...");
+        }
+
+        QNetworkAccessManager *manager = new QNetworkAccessManager(this);
+        connect(manager, SIGNAL(finished(QNetworkReply*)),
+                this, SLOT(handleNetworkData(QNetworkReply*)));
+        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);
+            QRegExp regex("dpap=([A-Za-z0-9]+)");
+            regex.indexIn(href);
+            QString airport = regex.cap(1);
+            m_url.addEncodedQueryItem("dpap", QUrl::toPercentEncoding(airport));
+            QNetworkAccessManager *manager = new QNetworkAccessManager(this);
+            connect(manager, SIGNAL(finished(QNetworkReply*)),
+                    this, SLOT(handleNetworkData(QNetworkReply*)));
+            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()) {
+                    QString cn = className.toString();
+                    if (cn.contains("fieldTitle")) {
+                        inFieldName = true;
+                        fieldNames += QString();
+                        fieldValues += QString();
+                    }
+                    if (cn.contains("fieldValue"))
+                        inFieldValue = true;
+                }
+                if (xml.name() == "img" && inFlightMap) {
+                    QString src = xml.attributes().value("src").toString();
+                    src.prepend("http://mobile.flightview.com");
+                    QUrl url = QUrl::fromPercentEncoding(src.toAscii());
+                    QNetworkAccessManager *manager = new QNetworkAccessManager(this);
+                    connect(manager, SIGNAL(finished(QNetworkReply*)),
+                            this, SLOT(handleMapData(QNetworkReply*)));
+                    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;
+#if defined(Q_OS_SYMBIAN)
+    w.showMaximized();
+#else
+    w.resize(360, 504);
+    w.show();
+#endif
+
+    return app.exec();
+}