examples/cpp/map-controls/main.cpp

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//
// This file is part of the Marble Virtual Globe.
//
// This program is free software licensed under the GNU LGPL. You can
// find a copy of this license in LICENSE.txt in the top directory of
// the source code.
//
// Copyright 2012      Dennis Nienhüser <earthwings@gentoo.org>
//

#include <QApplication>

#include <QLayout>
#include <QSlider>
#include <QLabel>

#include <marble/MarbleWidget.h>

using namespace Marble;

int main(int argc, char** argv)
{
    QApplication app(argc,argv);
    QWidget *window = new QWidget;

    // Create a Marble QWidget without a parent
    MarbleWidget *mapWidget = new MarbleWidget();

    // Load the Plain map
    mapWidget->setMapThemeId("earth/plain/plain.dgml");

    // Hide the FloatItems: OverviewMap, ScaleBar and Compass
    mapWidget->setShowOverviewMap(false);
    mapWidget->setShowScaleBar(false);
    mapWidget->setShowCompass(false);

    // Set the map quality to gain speed
    mapWidget->setMapQualityForViewContext( NormalQuality, Still );
    mapWidget->setMapQualityForViewContext( LowQuality, Animation );

    // Create a horizontal zoom slider and set the default zoom
    QSlider * zoomSlider = new QSlider(Qt::Horizontal);
    zoomSlider->setMinimum( 1000 );
    zoomSlider->setMaximum( 2400 );

    mapWidget->zoomView( zoomSlider->value() );

    // Create a label to show the geodetic position
    QLabel * positionLabel = new QLabel();
    positionLabel->setSizePolicy( QSizePolicy::Preferred, QSizePolicy::Fixed );

    // Add all widgets to the vertical layout.
    QVBoxLayout *layout = new QVBoxLayout;
    layout->addWidget(mapWidget);
    layout->addWidget(zoomSlider);
    layout->addWidget(positionLabel);

    // Center the map onto a given position
    GeoDataCoordinates home(-60.0, -10.0, 0.0, GeoDataCoordinates::Degree);
    mapWidget->centerOn(home);

    // Connect the map widget to the position label.
    QObject::connect( mapWidget, SIGNAL(mouseMoveGeoPosition(QString)),
                      positionLabel, SLOT(setText(QString)) );

    // Connect the zoom slider to the map widget and vice versa.
    QObject::connect( zoomSlider, SIGNAL(valueChanged(int)),
                      mapWidget, SLOT(zoomView(int)) );
    QObject::connect( mapWidget, SIGNAL(zoomChanged(int)),
                      zoomSlider, SLOT(setValue(int)) );

    window->setLayout(layout);
    window->resize( 400, 300 );

    window->show();

    return app.exec();
}