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Don't rescale the view on map change

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This commit is contained in:
Martin Tůma 2017-06-26 00:20:42 +02:00
parent 945528d6b1
commit 002b9c35e1
9 changed files with 70 additions and 20 deletions
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20
src/atlas.cpp
View File

@ -227,6 +227,26 @@ qreal Atlas::zoomFit(const QSize &size, const QRectF &br)
return _zoom;
}
qreal Atlas::zoomFit(qreal resolution, const Coordinates &c)
{
_zoom = 0;
for (int z = 0; z < _zooms.count(); z++) {
for (int i = _zooms.at(z).first; i <= _zooms.at(z).second; i++) {
if (!_bounds.at(i).first.contains(_maps.at(i)->ll2pp(c)))
continue;
if (_maps.at(i)->resolution(_maps.at(i)->ll2xy(c)) < resolution)
return _zoom;
_zoom = z;
break;
}
}
return _zoom;
}
qreal Atlas::zoomIn()
{
_zoom = qMin(_zoom + 1, _zooms.size() - 1);

1
src/atlas.h
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@ -21,6 +21,7 @@ public:
qreal zoom() const;
qreal zoomFit(const QSize &size, const QRectF &br);
qreal zoomFit(qreal resolution, const Coordinates &c);
qreal zoomIn();
qreal zoomOut();

11
src/emptymap.cpp
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@ -41,6 +41,17 @@ qreal EmptyMap::zoomFit(const QSize &size, const QRectF &br)
return _scale;
}
qreal EmptyMap::zoomFit(qreal resolution, const Coordinates &c)
{
_scale = (360.0 * resolution) / (WGS84_RADIUS * 2 * M_PI
* cos(deg2rad(c.lat())));
_scale = qMax(_scale, SCALE_MAX);
_scale = qMin(_scale, SCALE_MIN);
return _scale;
}
qreal EmptyMap::resolution(const QPointF &p) const
{
return (WGS84_RADIUS * 2 * M_PI * _scale / 360.0

1
src/emptymap.h
View File

@ -17,6 +17,7 @@ public:
qreal zoom() const {return _scale;}
qreal zoomFit(const QSize &size, const QRectF &br);
qreal zoomFit(qreal resolution, const Coordinates &c);
qreal zoomIn();
qreal zoomOut();

1
src/map.h
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@ -22,6 +22,7 @@ public:
virtual qreal zoom() const = 0;
virtual qreal zoomFit(const QSize &size, const QRectF &br) = 0;
virtual qreal zoomFit(qreal resolution, const Coordinates &c) = 0;
virtual qreal zoomIn() = 0;
virtual qreal zoomOut() = 0;

1
src/offlinemap.h
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@ -28,6 +28,7 @@ public:
qreal zoom() const {return 0;}
qreal zoomFit(const QSize &, const QRectF &) {return 0;}
qreal zoomFit(qreal, const Coordinates &) {return 0;}
qreal zoomIn() {return 0;}
qreal zoomOut() {return 0;}

29
src/onlinemap.cpp
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@ -27,19 +27,12 @@ static QPoint mercator2tile(const QPointF &m, int z)
static qreal zoom2scale(int zoom)
{
return ((360.0/(qreal)(1<<zoom))/(qreal)TILE_SIZE);
return (360.0/(qreal)((1<<zoom) * TILE_SIZE));
}
static int scale2zoom(qreal scale)
{
int zoom = (int)log2(360.0/(scale * (qreal)TILE_SIZE));
if (zoom < ZOOM_MIN)
return ZOOM_MIN;
if (zoom > ZOOM_MAX)
return ZOOM_MAX;
return zoom;
return (int)log2(360.0/(scale * (qreal)TILE_SIZE));
}
@ -181,12 +174,30 @@ qreal OnlineMap::zoomFit(const QSize &size, const QRectF &br)
Coordinates bottomRight(br.bottomRight());
QRectF tbr(Mercator().ll2xy(topLeft), Mercator().ll2xy(bottomRight));
QPointF sc(tbr.width() / size.width(), tbr.height() / size.height());
_zoom = scale2zoom(qMax(sc.x(), sc.y()));
if (_zoom < ZOOM_MIN)
_zoom = ZOOM_MIN;
if (_zoom > ZOOM_MAX)
_zoom = ZOOM_MAX;
}
return _zoom;
}
qreal OnlineMap::zoomFit(qreal resolution, const Coordinates &c)
{
_zoom = (int)(log2((WGS84_RADIUS * 2 * M_PI * cos(deg2rad(c.lat())))
/ resolution) - log2(TILE_SIZE));
if (_zoom < ZOOM_MIN)
_zoom = ZOOM_MIN;
if (_zoom > ZOOM_MAX)
_zoom = ZOOM_MAX;
return _zoom;
}
qreal OnlineMap::resolution(const QPointF &p) const
{
qreal scale = zoom2scale(_zoom);

1
src/onlinemap.h
View File

@ -20,6 +20,7 @@ public:
qreal zoom() const {return _zoom;}
qreal zoomFit(const QSize &size, const QRectF &br);
qreal zoomFit(qreal resolution, const Coordinates &c);
qreal zoomIn();
qreal zoomOut();

25
src/pathview.cpp
View File

@ -8,7 +8,6 @@
#include "poi.h"
#include "data.h"
#include "map.h"
#include "emptymap.h"
#include "trackitem.h"
#include "routeitem.h"
#include "waypointitem.h"
@ -16,10 +15,11 @@
#include "keys.h"
#include "pathview.h"
#define MAX_ZOOM 1
#define MIN_ZOOM -3
#define MARGIN 10.0
#define SCALE_OFFSET 7
#define MAX_DIGITAL_ZOOM 1
#define MIN_DIGITAL_ZOOM -3
#define MARGIN 10.0
#define SCALE_OFFSET 7
static void unite(QRectF &rect, const QPointF &p)
{
@ -271,6 +271,10 @@ void PathView::setPalette(const Palette &palette)
void PathView::setMap(Map *map)
{
QPointF pos = mapToScene(QRect(QPoint(), viewport()->size()).center());
Coordinates center = _map->xy2ll(pos);
qreal resolution = _map->resolution(pos);
_map->unload();
disconnect(_map, SIGNAL(loaded()), this, SLOT(redraw()));
@ -280,7 +284,7 @@ void PathView::setMap(Map *map)
resetDigitalZoom();
mapScale();
_map->zoomFit(resolution, center);
_scene->setSceneRect(_map->bounds());
for (int i = 0; i < _tracks.size(); i++)
@ -295,10 +299,9 @@ void PathView::setMap(Map *map)
it.value()->setMap(_map);
updatePOIVisibility();
QPointF center = contentCenter();
centerOn(center);
centerOn(_map->ll2xy(center));
_res = _map->resolution(center);
_res = _map->resolution(_map->ll2xy(center));
_mapScale->setResolution(_res);
resetCachedContent();
@ -420,8 +423,8 @@ void PathView::zoom(int zoom, const QPoint &pos, const Coordinates &c)
if (_digitalZoom) {
if (((_digitalZoom > 0 && zoom > 0) && (!shift || _digitalZoom
>= MAX_ZOOM)) || ((_digitalZoom < 0 && zoom < 0) && (!shift
|| _digitalZoom <= MIN_ZOOM)))
>= MAX_DIGITAL_ZOOM)) || ((_digitalZoom < 0 && zoom < 0) && (!shift
|| _digitalZoom <= MIN_DIGITAL_ZOOM)))
return;
digitalZoom(zoom);