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First cut at selecting dives from the map

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We'll want to enhance this: better logic for which dives are near the
selection, and it's probably best to have a "control-click" that adds
the dives to the selection rather than deselecting all the old ones.

But it's already useful.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2013-06-05 15:41:52 +09:00 • committed by Dirk Hohndel
parent b533cf299f
commit a737f59553
3 changed files with 61 additions and 1 deletions
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41
qt-ui/globe.cpp
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@ -1,5 +1,7 @@
#include "globe.h"
#include "kmessagewidget.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "../dive.h"
#include "../helpers.h"
@ -60,7 +62,44 @@ GlobeGPS::GlobeGPS(QWidget* parent) : MarbleWidget(parent), loadedDives(0)
void GlobeGPS::mouseClicked(qreal lon, qreal lat, GeoDataCoordinates::Unit unit)
{
GeoDataCoordinates here(lon, lat, unit);
qDebug("At this point Linus will make magic appear... %f/%f", here.longitude(GeoDataCoordinates::Degree), here.latitude(GeoDataCoordinates::Degree));
long lon_udeg = rint(1000000 * here.longitude(GeoDataCoordinates::Degree));
long lat_udeg = rint(1000000 * here.latitude(GeoDataCoordinates::Degree));
// distance() is in km above the map.
// We're going to use that to decide how
// approximate the dives have to be.
//
// Totally arbitrarily I say that 1km
// distance means that we can resolve
// to about 100m. Which in turn is about
// 1000 udeg.
//
// Trigonometry is hard, but sin x == x
// for small x, so let's just do this as
// a linear thing.
long resolve = rint(distance() * 1000);
int idx;
struct dive *dive;
bool first = true;
for_each_dive(idx, dive) {
long lat_diff, lon_diff;
if (!dive_has_gps_location(dive))
continue;
lat_diff = labs(dive->latitude.udeg - lat_udeg);
lon_diff = labs(dive->longitude.udeg - lon_udeg);
if (lat_diff > 180000000)
lat_diff = 360000000 - lat_diff;
if (lon_diff > 180000000)
lon_diff = 180000000 - lon_diff;
if (lat_diff > resolve || lon_diff > resolve)
continue;
if (first)
mainWindow()->dive_list()->unselectDives();
mainWindow()->dive_list()->selectDive(dive, first);
first = false;
}
}
void GlobeGPS::reload()