src/map/tileloader.cpp

   1 #include <QDir>
   2 #include <QFileInfo>
   3 #include <QEventLoop>
   4 #include "tileloader.h"
   5
   6
   7 static bool loadTileFile(Tile &tile, const QString &file)
   8 {
   9         if (!tile.pixmap().load(file)) {
  10                 qWarning("%s: error loading tile file\n", qPrintable(file));
  11                 return false;
  12         }
  13
  14         return true;
  15 }
  16
  17 TileLoader::TileLoader(const QString &dir, QObject *parent)
  18   : QObject(parent), _dir(dir)
  19 {
  20         if (!QDir().mkpath(_dir))
  21                 qWarning("%s: %s\n", qPrintable(_dir), "Error creating tiles directory");
  22
  23         _downloader = new Downloader(this);
  24         connect(_downloader, SIGNAL(finished()), this, SIGNAL(finished()));
  25 }
  26
  27 void TileLoader::loadTilesAsync(QList<Tile> &list)
  28 {
  29         QList<Download> dl;
  30
  31         for (int i = 0; i < list.size(); i++) {
  32                 Tile &t = list[i];
  33                 QString file(tileFile(t));
  34                 QFileInfo fi(file);
  35                 QUrl url(tileUrl(t));
  36
  37                 if (url.isLocalFile())
  38                         loadTileFile(t, url.toLocalFile());
  39                 else if (fi.exists())
  40                         loadTileFile(t, file);
  41                 else
  42                         dl.append(Download(tileUrl(t), file));
  43         }
  44
  45         if (!dl.empty())
  46                 _downloader->get(dl, _authorization);
  47 }
  48
  49 void TileLoader::loadTilesSync(QList<Tile> &list)
  50 {
  51         QList<Download> dl;
  52
  53         for (int i = 0; i < list.size(); i++) {
  54                 Tile &t = list[i];
  55                 QString file(tileFile(t));
  56                 QFileInfo fi(file);
  57                 QUrl url(tileUrl(t));
  58
  59                 if (url.isLocalFile())
  60                         loadTileFile(t, url.toLocalFile());
  61                 else if (fi.exists())
  62                         loadTileFile(t, file);
  63                 else
  64                         dl.append(Download(tileUrl(t), file));
  65         }
  66
  67         if (dl.empty())
  68                 return;
  69
  70         QEventLoop wait;
  71         QObject::connect(_downloader, SIGNAL(finished()), &wait, SLOT(quit()));
  72         if (_downloader->get(dl, _authorization))
  73                 wait.exec();
  74
  75         for (int i = 0; i < list.size(); i++) {
  76                 Tile &t = list[i];
  77
  78                 if (t.pixmap().isNull()) {
  79                         QString file = tileFile(t);
  80                         if (QFileInfo(file).exists())
  81                                 loadTileFile(t, file);
  82                 }
  83         }
  84 }
  85
  86 void TileLoader::clearCache()
  87 {
  88         QDir dir = QDir(_dir);
  89         QStringList list = dir.entryList();
  90
  91         for (int i = 0; i < list.count(); i++)
  92                 dir.remove(list.at(i));
  93
  94         _downloader->clearErrors();
  95 }
  96
  97 QUrl TileLoader::tileUrl(const Tile &tile) const
  98 {
  99         QString url(_url);
 100
 101         if (!tile.bbox().isNull()) {
 102                 QString bbox = QString("%1,%2,%3,%4").arg(
 103                   QString::number(tile.bbox().left(), 'f', 6),
 104                   QString::number(tile.bbox().bottom(), 'f', 6),
 105                   QString::number(tile.bbox().right(), 'f', 6),
 106                   QString::number(tile.bbox().top(), 'f', 6));
 107                 url.replace("$bbox", bbox);
 108         } else {
 109                 url.replace("$z", tile.zoom().toString());
 110                 url.replace("$x", QString::number(tile.xy().x()));
 111                 url.replace("$y", QString::number(tile.xy().y()));
 112         }
 113
 114         return QUrl(url);
 115 }
 116
 117 QString TileLoader::tileFile(const Tile &tile) const
 118 {
 119         QString file = _dir + QString("/%1-%2-%3").arg(tile.zoom().toString())
 120           .arg(tile.xy().x()).arg(tile.xy().y());
 121
 122         return file;
 123 }