Logitech, Microsoft, and Kensington together supply mice for over 50% of the market. With only a few exceptions (the 2-button ValuMouse by Kensington and a 1-button replacement for the Macintosh), all of their models include a scroll wheel (in some cases, a "scroll sensor" or trackball). The remainder of the mouse industry is composed mostly of OEM manufacturers who provide either clones of the wheel mice or "value" models which are expected to be replaced after the original sale of the computer.
I think it is a reasonable assumption that a majority of mice have scroll wheels. -- _______________________________________________ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
