- From: Olli Pettay <Olli.Pettay@helsinki.fi>
- Date: Sun, 14 Dec 2008 23:14:53 +0200
- To: Travis Leithead <Travis.Leithead@microsoft.com>
- CC: "public-webapps@w3.org" <public-webapps@w3.org>
Hi Travis, On 12/09/2008 02:15 AM, Travis Leithead wrote: >>> Pixel scrolling / line scrolling aren't "intended purpose". They are describing the data browser gets from the operating > system. > > At least on Windows-OS, this binding of pixel/line scrolling to a wheel event does not exist. I think that the design taken for the OS-level event provides good design guidance for how the event could be used inside of a web application: > >> From MSDN (http://msdn.microsoft.com/en-us/library/ms645617.aspx) -- > wParam > The high-order word indicates the distance the wheel is rotated, expressed in multiples or divisions of WHEEL_DELTA, which is 120. A positive value indicates that the wheel was rotated forward, away from the user; a negative value indicates that the wheel was rotated backward, toward the user. Windows doesn't have pixel/line scrolling but it *does* have page/line scrolling. See http://msdn.microsoft.com/en-us/library/ms645601.aspx#_win32_The_Mouse_Wheel and SPI_GETWHEELSCROLLLINES/SPI_SETWHEELSCROLLLINES http://msdn.microsoft.com/en-us/library/aa932539.aspx -Olli
Received on Sunday, 14 December 2008 21:15:25 UTC