Detecting when PopupApplet is iconified

[Rob Hasselbaum]

On Fri, Mar 19, 2010 at 12:43 PM, Sebastian Kügler <sebas at kde.org> wrote:
> I wonder if we could just offer queueing updates from dataengines until an applet is
> about to be shown. Especially for mobile devices, this "not waking up unless shown"
> can be very important.

In my case, the act of getting the data is what I'm trying to prevent.
It's expensive. So just blocking the updates from propagating between
the data engine and the applet isn't enough. And a nice benefit of
pausing the data engine's work is that the applet becomes idle on its
own.