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Enabled free map scroll.

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This commit is contained in:
Martin Tůma
2017-01-16 09:54:12 +01:00
parent 5581cff55b
commit 1a29ab6304
4 changed files with 69 additions and 88 deletions
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41
src/scaleitem.cpp
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@ -1,8 +1,5 @@
#include <QPainter>
#include "config.h"
#include "rd.h"
#include "wgs84.h"
#include "tile.h"
#include "misc.h"
#include "scaleitem.h"
@ -13,17 +10,11 @@
#define SEGMENTS 3
#define PADDING 4
static qreal zoom2resolution(int zoom, qreal y)
{
return (WGS84_RADIUS * 2 * M_PI / Tile::size()
* cos(2.0 * atan(exp(deg2rad(y))) - M_PI/2)) / (qreal)(1<<zoom);
}
ScaleItem::ScaleItem(QGraphicsItem *parent) : QGraphicsItem(parent)
{
_units = Metric;
_zoom = 0;
_lat = 0;
_res = 1.0;
#ifndef Q_OS_MAC
setCacheMode(QGraphicsItem::DeviceCoordinateCache);
@ -96,45 +87,33 @@ QString ScaleItem::units() const
void ScaleItem::computeScale()
{
qreal res = zoom2resolution(_zoom, _lat);
if (_units == Imperial) {
_length = niceNum((res * M2FT * SCALE_WIDTH) / SEGMENTS, 1);
_length = niceNum((_res * M2FT * SCALE_WIDTH) / SEGMENTS, 1);
if (_length >= MIINFT) {
_length = niceNum((res * M2FT * FT2MI * SCALE_WIDTH) / SEGMENTS, 1);
_width = (_length / (res * M2FT * FT2MI));
_length = niceNum((_res * M2FT * FT2MI * SCALE_WIDTH) / SEGMENTS, 1);
_width = (_length / (_res * M2FT * FT2MI));
_scale = true;
} else {
_width = (_length / (res * M2FT));
_width = (_length / (_res * M2FT));
_scale = false;
}
} else {
_length = niceNum((res * SCALE_WIDTH) / SEGMENTS, 1);
_length = niceNum((_res * SCALE_WIDTH) / SEGMENTS, 1);
if (_length >= KMINM) {
_length *= M2KM;
_width = (_length / (res * M2KM));
_width = (_length / (_res * M2KM));
_scale = true;
} else {
_width = (_length / res);
_width = (_length / _res);
_scale = false;
}
}
}
void ScaleItem::setZoom(int z, qreal lat)
void ScaleItem::setResolution(qreal res)
{
prepareGeometryChange();
_zoom = z;
_lat = lat;
computeScale();
updateBoundingRect();
update();
}
void ScaleItem::setZoom(int z)
{
prepareGeometryChange();
_zoom = z;
_res = res;
computeScale();
updateBoundingRect();
update();