Well, QMidiPlayer is now in active development. Now it is in its alpha stage. Comparing the original design and the real product resulted in a great surprise to me.

The design

The real product

  For the main window, the real thing is almost identical to the design. Other windows also strongly resemble their design.
  So what's the point?

A good design, not necessary to be opulent, wants to be realized.

A good programmer, not necessary to be brilliant, should be faithful to the design.

But if you are a designer and programmer...