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#include <QtCore/QDebug>
#include <QtGui/QMainWindow>
#include <QtGui/QLabel>
#include <QtLocation/QGeoMapData>
#include <QtLocation/QGraphicsGeoMap>
#include "qmapwatchletplugin.h"
#include "mapview.h"
QTM_USE_NAMESPACE
using namespace sowatch;
MapView::MapView(QDeclarativeItem *parent) :
QDeclarativeItem(parent),
_enabled(false),
_mapData(0),
_pos(QGeoPositionInfoSource::createDefaultSource(this))
{
QGeoServiceProvider *provider = QMapWatchletPlugin::geoServiceProvider();
if (!provider) {
qWarning() << "No geo service provider for map watchlet!";
}
QGeoMappingManager *manager = provider->mappingManager();
_mapData = manager->createMapData();
if (_mapData) {
_mapData->init();
_mapData->setMapType(QGraphicsGeoMap::StreetMap);
_mapData->setZoomLevel(10);
connect(_mapData, SIGNAL(zoomLevelChanged(qreal)), SIGNAL(zoomLevelChanged()));
connect(_mapData, SIGNAL(updateMapDisplay(QRectF)), SLOT(handleMapChanged(QRectF)));
} else {
qWarning() << "No mapdata!";
}
if (_pos) {
connect(_pos, SIGNAL(positionUpdated(QGeoPositionInfo)),
SLOT(handlePositionUpdate(QGeoPositionInfo)));
_pos->lastKnownPosition();
} else {
qWarning() << "No position source for moving map!";
}
setFlag(QGraphicsItem::ItemHasNoContents, false);
}
MapView::~MapView()
{
delete _mapData;
}
bool MapView::updateEnabled() const
{
return _enabled;
}
void MapView::setUpdateEnabled(bool enabled)
{
if (_pos && _enabled != enabled) {
if (enabled) {
qDebug() << "Start position updates";
_pos->startUpdates();
} else {
qDebug() << "Stop position updates";
_pos->stopUpdates();
}
_enabled = enabled;
emit updateEnabledChanged();
}
}
int MapView::updateInterval() const
{
if (_pos) {
return _pos->updateInterval();
} else {
return 0;
}
}
void MapView::setUpdateInterval(int msec)
{
if (_pos) {
_pos->setUpdateInterval(msec);
emit updateIntervalChanged();
}
}
qreal MapView::zoomLevel() const
{
if (_mapData) {
return _mapData->zoomLevel();
} else {
return -1.0;
}
}
void MapView::setZoomLevel(qreal level)
{
if (_mapData) {
_mapData->setZoomLevel(level);
qDebug() << "new zoom level" << level;
}
}
void MapView::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget);
if (_mapData) {
// Render to an image first
const QSize size(_mapData->windowSize().toSize());
QImage image(size, QImage::Format_RGB32);
QImage pixmap(size, QImage::Format_MonoLSB);
const int w = image.width(), h = image.height();
const int npixels = w * h;
QScopedArrayPointer<qreal> greys(new qreal[npixels]);
{
QPainter p(&image);
_mapData->paint(&p, option);
}
// Convert to a bitmap using some ad-hoc ugly algorithm...
qreal sum = 0;
for (int y = 0; y < h; y++) {
QRgb *l = reinterpret_cast<QRgb*>(image.scanLine(y));
for (int x = 0; x < w; x++) {
const int r = qRed(l[x]), g = qGreen(l[x]), b = qBlue(l[x]);
const qreal grey = r * 0.299f + g * 0.587f + b * 0.114f;
greys[y * w + x] = grey;
sum += grey;
}
}
const qreal avg = sum / npixels;
const qreal thr = avg * 0.9;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
// TODO: Optimize
pixmap.setPixel(x, y, greys[y * w + x] >= thr ? Qt::color1 : Qt::color0);
}
}
// And render into the watch
painter->drawImage(0, 0, pixmap);
}
}
void MapView::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
Q_UNUSED(oldGeometry);
if (_mapData) {
_mapData->setWindowSize(newGeometry.size());
}
}
void MapView::handlePositionUpdate(const QGeoPositionInfo& info)
{
if (_mapData) {
qDebug() << "Got pos for map";
_mapData->setCenter(info.coordinate());
}
}
void MapView::handleMapChanged(const QRectF &rect)
{
Q_UNUSED(rect);
update(); // Always do full updates
}
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