Palette toolbar

[Radagast]

I need a widget that implements the palette toolbar, like in CorelDRAW (or at least like in Windows' Paint). I mean that there should be a column of tiny squares, each represent a color and a button, when I press it, some more columns appear with the rest of colors. And also it must be possible to add custom colors. And current color should be highlighted somehow.
I've looked through Qxt, Qwt, many websites, but didn't find anything appropriate I'm sure that such a widget must exist...somewhere...
thanks in advance


P.S. and a little question...I wonder why QGraphicsItem (and none of its children) doesn't have copy constructor and operator=