[webkit-dev] Mouse wheel event precision

[Peter Kasting]

On Tue, Jun 8, 2010 at 8:34 PM, Nathan Vander Wilt <nate-lists at calftrail.com
> wrote:

> What Safari 5's WebKit does is turn one "line" into 4800 (!) units instead
> of 40. For Safari 5 the code above needs to read as follows to work the
> same. You can see it isn't really "more compatible" at all:
>
> var delta;              // one scroll wheel "click" (corresponds to zoom
> level zoom level)
> if (isSafari5) {
>        delta = e.wheelDelta / 120 / 120;
> } else if (e.wheelDelta) {
>        delta = e.wheelDelta/120;
>        if (window.opera && window.opera.version() < 9.2) {
>                delta = -delta;
>        }
> } else if (e.detail) {
>        delta = -e.detail / 3;
> }


If you write a simple test page that demonstrates wheel events being handled
very differently by IE vs. Safari, please file a bug at bugs.webkit.org.
 The goal of the current behavior is compatibility with IE.

PK
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