Dianne! Brilliant answer! Thank you very much! Pressing my luck, where does that translation happen? RootView? Activity?
Many thanks! -blake On Jan 10, 6:23 pm, "Dianne Hackborn" <hack...@android.com> wrote: > The framework translates raw trackball events into DPAD events if nobody > consumes the trackball event. > > At this time Android only supports devices that have a touch screen. The > trackball is optional, and can be replaced by a DPAD. > > > > On Sat, Jan 10, 2009 at 5:21 PM, blake <blake.me...@gmail.com> wrote: > > > mmmm... it appears that I was mistaken. Both trackball movement and > > screen taps generate MotionEvents. They are delivered completely > > differently, though Trackball events through dispatchTrackballEvent, > > and touch events through dispatchTouchEvent. > > > I remain mystified by how the trackball is handled. It begins to look > > as if it generates MotionEvents exactly as the touch screen does. > > Presumably, clicking it generates a KEYCODE_DPAD_CENTER event. How do > > you generate a KEYCODE_DPAD_UP on, e.g., a G1? > > > -blake > > > On Jan 10, 4:40 pm, blake <blake.me...@gmail.com> wrote: > > > I notice that TrackballEvents are different that MotionEvents, and it > > > makes me wonder what happens on a device that does not support a touch > > > screen. > > > > Suppose I have an Etch-a-Sketch application, that allows me to do > > > crude drawings on my screen. With the G1 phone, I just watch for > > > MotionEvents and draw them. > > > > Can anyone confirm (or deny) that, on a device that doesn't have a > > > touch screen, my application will not work? Or, possibly, might > > > trackball events appear as MotionEvents, on such a device. > > > > -blake > > -- > Dianne Hackborn > Android framework engineer > hack...@android.com > > Note: please don't send private questions to me, as I don't have time to > provide private support. All such questions should be posted on public > forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
