src/map/emptymap.cpp

   1 #include <QtGlobal>
   2 #include <QPainter>
   3 #include "common/rectc.h"
   4 #include "emptymap.h"
   5
   6
   7 #define TILE_SIZE 256
   8
   9 static int limitZoom(int zoom)
  10 {
  11         if (zoom < OSM::ZOOMS.min())
  12                 return OSM::ZOOMS.min();
  13         if (zoom > OSM::ZOOMS.max())
  14                 return OSM::ZOOMS.max();
  15
  16         return zoom;
  17 }
  18
  19
  20 EmptyMap::EmptyMap(QObject *parent) : Map(QString(), parent)
  21 {
  22         _zoom = OSM::ZOOMS.max();
  23 }
  24
  25 QRectF EmptyMap::bounds()
  26 {
  27         return QRectF(ll2xy(OSM::BOUNDS.topLeft()), ll2xy(OSM::BOUNDS.bottomRight()));
  28 }
  29
  30 int EmptyMap::zoomFit(const QSize &size, const RectC &rect)
  31 {
  32         if (!rect.isValid())
  33                 _zoom = OSM::ZOOMS.max();
  34         else {
  35                 QRectF tbr(OSM::ll2m(rect.topLeft()), OSM::ll2m(rect.bottomRight()));
  36                 QPointF sc(tbr.width() / size.width(), tbr.height() / size.height());
  37
  38                 _zoom = limitZoom(OSM::scale2zoom(qMax(sc.x(), -sc.y()), TILE_SIZE));
  39         }
  40
  41         return _zoom;
  42 }
  43
  44 qreal EmptyMap::resolution(const QRectF &rect)
  45 {
  46         return OSM::resolution(rect.center(), _zoom, TILE_SIZE);
  47 }
  48
  49 int EmptyMap::zoomIn()
  50 {
  51         _zoom = qMin(_zoom + 1, OSM::ZOOMS.max());
  52         return _zoom;
  53 }
  54
  55 int EmptyMap::zoomOut()
  56 {
  57         _zoom = qMax(_zoom - 1, OSM::ZOOMS.min());
  58         return _zoom;
  59 }
  60
  61 void EmptyMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
  62 {
  63         Q_UNUSED(painter);
  64         Q_UNUSED(rect);
  65         Q_UNUSED(flags);
  66 }
  67
  68 QPointF EmptyMap::ll2xy(const Coordinates &c)
  69 {
  70         qreal scale = OSM::zoom2scale(_zoom, TILE_SIZE);
  71         QPointF m = OSM::ll2m(c);
  72         return QPointF(m.x() / scale, m.y() / -scale);
  73 }
  74
  75 Coordinates EmptyMap::xy2ll(const QPointF &p)
  76 {
  77         qreal scale = OSM::zoom2scale(_zoom, TILE_SIZE);
  78         return OSM::m2ll(QPointF(p.x() * scale, -p.y() * scale));
  79 }