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//! [0]
#include <QApplication>
#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();
}
//! [0]
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