Subversion Repositories riscv_vhdl

#include "StreetMapObject.h"

#include "moc_StreetMapObject.h"

#include <QtWidgets/QtWidgets>

#include <QtCore/QDateTime>

#include <QtNetwork/QtNetwork>

#include <math.h>

#ifndef M_PI

#define M_PI 3.14159265358979323846

#endif

/** This hash function must be placed into global namespace,

 *  otherwise QHash<QPoint, QPixmap> will generate errors

 */

static uint qHash(const QPoint& p) {

    return p.x() * 17 ^ p.y();

}

namespace debugger {

// tile size in pixels

static const int TILE_SIZE = 256;

static QPointF tileForCoordinate(qreal lat, qreal lng, int zoom) {

    qreal zn = static_cast<qreal>(1 << zoom);

    qreal tx = (lng + 180.0) / 360.0;

    qreal ty = (1.0 - log(tan(lat * M_PI / 180.0) +

                          1.0 / cos(lat * M_PI / 180.0)) / M_PI) / 2.0;

    return QPointF(tx * zn, ty * zn);

}

static qreal longitudeFromTile(qreal tx, int zoom) {

    qreal zn = static_cast<qreal>(1 << zoom);

    qreal lat = tx / zn * 360.0 - 180.0;

    return lat;

}

static qreal latitudeFromTile(qreal ty, int zoom) {

    qreal zn = static_cast<qreal>(1 << zoom);

    qreal n = M_PI - 2 * M_PI * ty / zn;

    qreal lng = 180.0 / M_PI * atan(0.5 * (exp(n) - exp(-n)));

    return lng;

}

// Zoom: 1=world map

//       12 = 0.5 of Moscow

//       15 = default

StreetMap::StreetMap(QObject *parent, int zoom_)

    : QObject(parent) {

    width = 400;

    height = 300;

    zoom = zoom_;

    latitude = 0;

    longitude = 0;

    m_emptyTile = QPixmap(TILE_SIZE, TILE_SIZE);

    m_emptyTile.fill(Qt::lightGray);

#if 0

    m_proxy.setType(QNetworkProxy::HttpProxy);

    m_proxy.setHostName(tr("http://proxy.server.com"));

    m_proxy.setPort(911);

    m_manager.setProxy(m_proxy);

#endif

    QNetworkDiskCache *cache = new QNetworkDiskCache;

    cache->setCacheDirectory(

        QStandardPaths::writableLocation(QStandardPaths::CacheLocation));

    m_manager.setCache(cache);

    connect(&m_manager, SIGNAL(finished(QNetworkReply*)),

            this, SLOT(handleNetworkData(QNetworkReply*)));

}

StreetMap::~StreetMap() {

}

QPoint StreetMap::coordToPixpos(QPointF coord) {

    QPointF f = tileForCoordinate(coord.x(), coord.y(), zoom);

    f -= ct;

    f *= TILE_SIZE;

    int x = width/2 + (int)(f.x() + 0.5);

    int y = height/2 + (int)((int)f.y() + 0.5);

    return QPoint(x, y);

}

QRect StreetMap::coordToPixpos(QRectF coord) {

    QRect ret;

    QPoint c = coordToPixpos(coord.topLeft());

    ret.setTopLeft(c);

    c = coordToPixpos(coord.bottomRight());

    ret.setBottomRight(c);

    return ret;

}

QRectF StreetMap::getBorderCoord() {

    QRectF ret;

    qreal x0 = ct.x() - 0.5*double(width)/TILE_SIZE;

    qreal x1 = ct.x() + 0.5*double(width)/TILE_SIZE;

    ret.setTop(longitudeFromTile(x0, zoom));

    ret.setBottom(longitudeFromTile(x1, zoom));

    qreal y0 = ct.y() - 0.5*double(height)/TILE_SIZE;

    qreal y1 = ct.y() + 0.5*double(height)/TILE_SIZE;

    ret.setLeft(latitudeFromTile(y0, zoom));

    ret.setRight(latitudeFromTile(y1, zoom));

    return ret;

}

void StreetMap::setCenterCoord(QPointF coord) {

    if (width <= 0 || height <= 0)

        return;

    latitude = coord.x();

    longitude = coord.y();

    // Normalize lat/lon to range (0.0...1.0)*(1<<scale)

    // It means that full world map will be splitted on (1<<scale) x (1<<scale) rectangles.

    // If scale =12, then full map 4096 x 4096 tiles

    ct = tileForCoordinate(latitude, longitude, zoom);

    qreal tx = ct.x();

    qreal ty = ct.y();

    // Each tile 256x256 size:

    double centertile_x = (tx - (double)((int)tx)) * TILE_SIZE;

    double centertile_y = (ty - (double)((int)ty)) * TILE_SIZE;

    // top-left corner of the center tile

    int xp = width / 2 - centertile_x;

    int yp = height / 2 - centertile_y;

    // first tile vertical and horizontal

    int beforetile_x = (xp + TILE_SIZE - 1) / TILE_SIZE;

    int beforetile_y = (yp + TILE_SIZE - 1) / TILE_SIZE;

    int xs = static_cast<int>(tx) - beforetile_x;

    int ys = static_cast<int>(ty) - beforetile_y;

    // offset for top-left tile

    m_offset = QPoint(xp - beforetile_x * TILE_SIZE,

                      yp - beforetile_y * TILE_SIZE);

    // last tile vertical and horizontal

    int aftertile_x = (width - xp - 1) / TILE_SIZE;

    int aftertile_y = (height - yp - 1) / TILE_SIZE;

    int xe = static_cast<int>(tx) + aftertile_x;

    int ye = static_cast<int>(ty) + aftertile_y;

    // build a rect

    m_tilesRect = QRect(xs, ys, xe - xs + 1, ye - ys + 1);

}

QPointF StreetMap::getCenterCoord() {

    return QPointF(latitude, longitude);

}

void StreetMap::resize(int w, int h) {

    width = w;

    height = h;

    setCenterCoord(QPointF(latitude, longitude));

}

void StreetMap::render(QPainter *p, const QRect &rect) {

    for (int x = 0; x <= m_tilesRect.width(); ++x) {

        for (int y = 0; y <= m_tilesRect.height(); ++y) {

            QPoint tp(x + m_tilesRect.left(), y + m_tilesRect.top());

            QRect box = tileRect(tp);

            if (rect.intersects(box)) {

                if (m_tilePixmaps.contains(tp)) {

                    p->drawPixmap(box, m_tilePixmaps.value(tp));

                } else {

                    p->drawPixmap(box, m_emptyTile);

                }

            }

        }

    }

}

void StreetMap::pan(const QPoint &delta) {

    QPointF dx = QPointF(delta) / qreal(TILE_SIZE);

    QPointF center = tileForCoordinate(latitude, longitude, zoom) - dx;

    qreal lat = latitudeFromTile(center.y(), zoom);

    qreal lon = longitudeFromTile(center.x(), zoom);

    setCenterCoord(QPointF(lat, lon));

}

void StreetMap::slotRequestNetworkData() {

    download();

}

void StreetMap::handleNetworkData(QNetworkReply *reply) {

    QImage img;

    QPoint tp = reply->request().attribute(QNetworkRequest::User).toPoint();

    QUrl url = reply->url();

    if (!reply->error()) {

        if (!img.load(reply, 0)) {

            img = QImage();

        }

    }

    reply->deleteLater();

    m_tilePixmaps[tp] = QPixmap::fromImage(img);

    if (img.isNull()) {

        m_tilePixmaps[tp] = m_emptyTile;

    }

    emit signalTilesUpdated(tileRect(tp));

    // purge unused spaces

    QRect bound = m_tilesRect.adjusted(-2, -2, 2, 2);

    foreach(QPoint tp, m_tilePixmaps.keys())

    if (!bound.contains(tp)) {

        m_tilePixmaps.remove(tp);

    }

    download();

}

void StreetMap::download() {

    QPoint grab(0, 0);

    for (int x = 0; x <= m_tilesRect.width(); ++x) {

        for (int y = 0; y <= m_tilesRect.height(); ++y) {

            QPoint tp = m_tilesRect.topLeft() + QPoint(x, y);

            if (!m_tilePixmaps.contains(tp)) {

                grab = tp;

                break;

            }

        }

    }

    if (grab == QPoint(0, 0)) {

        m_url = QUrl();

        emit signalTilesUpdated(QRect());

        return;

    }

    QString path = "http://tile.openstreetmap.org/%1/%2/%3.png";

    m_url = QUrl(path.arg(zoom).arg(grab.x()).arg(grab.y()));

    QNetworkRequest request;

    request.setUrl(m_url);

    request.setRawHeader("User-Agent", "sergeykhbr (RISC-V debugger)");

    request.setAttribute(QNetworkRequest::User, QVariant(grab));

    m_manager.get(request);

}

QRect StreetMap::tileRect(const QPoint &tp) {

    QPoint t = tp - m_tilesRect.topLeft();

    int x = t.x() * TILE_SIZE + m_offset.x();

    int y = t.y() * TILE_SIZE + m_offset.y();

    return QRect(x, y, TILE_SIZE, TILE_SIZE);

}

}  // namespace debugger