This task (#244151) has been closed, but I'm sure that your
documentation isn't correct
(http://doc.trolltech.com/4.5/qglcolormap.html#details).

Example of use from documentation:

#include <QApplication <http://doc.trolltech.com/4.5/qapplication.html>>
#include <QGLColormap>

int main()

{ QApplication app(argc, argv); MySuperGLWidget widget; // a QGLWidget in color-index mode QGLColormap colormap; // This will fill the colormap with colors ranging from // black to white. for (int i = 0; i < colormap.size(); i++) colormap.setEntry(i, qRgb(i, i, i)); widget.setColormap(colormap); widget.show(); return app.exec(); }

In this example the program does not enter to the cycle at all, because
colormap was empty and colormap.size() = 0 before the cycle. So colormap
can't be filled such way and this example isn't correct.

Also no arguments are collected for app(argc, argv) from "int main()".