Hi Morten, On Tue, Jan 17, 2012 at 2:42 PM, <[email protected]> wrote: > QWheelEvent has fallen a bit behind and needs an update. It was once used for > mouse wheel events only, but is today also used for scroll events generated > from trackpad swipe gestures. > > There are two main issues: > > * QWheelEvents are either horizontal or vertical, requiring two events and > two calls to update() for a diagonal scroll. > * The delta unit is wheel degrees, high-res trackpads send pixel-based deltas.
yay, that's a great initiative! Hopefully this will ensure there no laggy scrolling in Qt on Mac! +2 from me. > > To fix this I'd like to deprecate QWheelEvent::delta() and > QWheelEvent::orientation() and add: > > QPoint pixelDelta() const > QPoint angleDelta() const > > pixelDelta() returns the delta in pixels, if the platform supports it. > angleDelta() returns the same values as delta(), but with both dx and dy > values in the same event. In order to preserve behavior compatibility with Qt > 4 we also need to send "compat" events with the second orientation() and > delta(). These will have pixelDelta and angleDelta set to null. I am not big fan of "pixelDelta" and "angleDelta" as function names, but I don't have any better suggestions. Denis. _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
