Difference between revisions of "Projects/Marble/MarbleCPlusPlus"

Revision as of 14:13, 5 July 2010

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 for a very easy integration of a map widget into your application.

Let's prove that with a tiny "Hello world"-like example. We just create a Marble::MarbleWidget object and show it:


include <QtGui/QApplication>
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

@@ Line 15: / Line 15: @@
 The Marble API allows for a very easy integration of a map widget into your application.
-Let's prove that with a tiny "Hello world"-like example. We just create a {{class|Marble::MarbleWidget}}[MarbleWidget]] object and show it:
+Let's prove that with a tiny "Hello world"-like example. We just create a {{class|Marble::MarbleWidget}} object and show it:
 <code cppqt>