RGB <-> HSV colorspace conversions.
This program shows how to convert colors between the different
color-space representations. The central area of the screen
will display the current color. On the top left corner of the
screen, three sliders allow you to modify the red, green and
blue value of the color. On the bottom right corner of the
screen, three sliders allow you to modify the hue, saturation
and value of the color. The color bars beneath the sliders
show what the resulting color will look like when the slider
is dragged to that position.
Additionally this example also shows how to "inherit" the
behaviour of a GUI object and extend it, here used to create