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qt에서 gps 데이터를 사용하여 속도와 거리를 얻을 수있는 방법은 무엇입니까? 나는 그런 수업을 가지고있다. 아마도 어떤 standart 방법 일까?Qt 이동성에서 GPS 데이터로 속도를 계산하는 방법은 무엇입니까?
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "quitdiallog.h"
#include <QGeoCoordinate>
#include <QDebug>
#include <QtGui/QMessageBox>
#include <QList>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
setWindowTitle("Мой кОмпаС");
ui->setupUi(this);
startGPS();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::startGPS()
{
// Obtain the location data source if it is not obtained already
if (!locationDataSource)
{
locationDataSource =
QGeoPositionInfoSource::createDefaultSource(this);
if (locationDataSource)
{
// Whenever the location data source signals that the current
// position is updated, the positionUpdated function is called.
QObject::connect(locationDataSource,
SIGNAL(positionUpdated(QGeoPositionInfo)),
this,
SLOT(positionUpdated(QGeoPositionInfo)));
// Start listening for position updates
locationDataSource->setUpdateInterval(200);
locationDataSource->startUpdates();
} else {
// Not able to obtain the location data source
// TODO: Error handling
}
} else {
// Start listening for position updates
locationDataSource->setUpdateInterval(5000);
locationDataSource->startUpdates();
}
}
void MainWindow::positionUpdated(QGeoPositionInfo geoPositionInfo)
{
if (geoPositionInfo.isValid())
{
//locationDataSource->stopUpdates();
QGeoCoordinate geoCoordinate = geoPositionInfo.coordinate();
this->latitude = geoCoordinate.latitude();
this->longitude = geoCoordinate.longitude();
this->altitude=geoCoordinate.altitude();
ui->label->setNum(latitude);
ui->label_2->setNum(longitude);
}
}
void MainWindow::on_pushButton_clicked()
{
ui->label_3->setNum(latitude);
qDebug()<<latitude<<" "<<longitude<<" "<<altitude;
}
void MainWindow::on_pushButton_4_clicked()
{
QuitDiallog *qi=new QuitDiallog;
this->hide();
qi->show();
}
속도를 얻는 방법 ???