Marble/MarbleCPlusPlus

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    Revision as of 22:23, 28 January 2010 by Earthwings (talk | contribs)


    Editing Projects/Marble/MarbleCPlusPlus

    Hello Marble
    Tutorial Series   Marble C++ Tutorial
    Previous   C++, Qt
    What's Next   Tutorial 2 - Marble's GeoPainter
    Further Reading   n/a


    Hello Marble!

    The Marble API allows a very easy integration of a map widget into your application. Let's prove that with a tiny "Hello world"-like example:

    1. include <QtGui/QApplication>
    2. include <marble/MarbleWidget.h>

    using namespace Marble;

    int main(int argc, char** argv) {

       QApplication app(argc,argv);
    
       // Create a Marble QWidget without a parent
       MarbleWidget *mapWidget = new MarbleWidget();
    
       // Load the OpenStreetMap map
       mapWidget->setMapThemeId("earth/openstreetmap/openstreetmap.dgml");
    
       mapWidget->show();
    
       return app.exec();
    

    }

    Save the code above as my_marble.cpp and compile it:

    g++ -I /usr/include/qt4/ -o my_marble my_marble.cpp -lmarblewidget -lQtGui
    

    If things go fine, execute ./my_marble and you end up with a fully usable OpenStreetMap application:

    Here's a little checklist to tackle some problems that might arise when compiling the code above:

    • You need Qt and Marble development packages (or comparable SVN installations)
    • If Qt headers are not installed in /usr/include/qt4 on your system, change the path in the g++ call above accordingly.
    • Likewise, add -I /path/to/marble/headers if they're not to be found in /usr/include