On Wed, Jul 6, 2011 at 10:34, Aaron J. Seigo <ase...@kde.org> wrote: > > > > So I'd like to know - is there any way that we can detect if the plasmoid > is > > in use from any KApp and not depend on Plasma libs? And related question > - > > is the dataengine in use only when the plasmoid is active? If so, is it > > "safe" (in terms that we can rely on it 100%) to export some activity > > indicator from the dataengine on dbus? > > the DataEngine is loaded on demand only (otherwise, think about it: every > DataEngine would be loaded on desktop start..), and when the last user of > it > goes away the DataEngine is deleted. remember that there can be more than > one > instance of your plasmoid, so the DataEngine is a much more direct and safe > way to go. >
Mostly just for the archiving record and as a thank-you-response - we went down this road and it works like a charm. Thanks. > a DataEngine can also determine if something is connected or not and > therefore > know itself if it is unused and just sitting there. it should, with the > reference counting, just be deleted, however. so using that is probably the > easiest way forward and works reliably with plasmoids. > > one wrinkle, however: keep in mind that right now DataEngines are > in-process, > so if i load the plasmoid in plasma-desktop and again in plasma-windowed or > plasma-overlay (the screensaver widgets) then there will be more than one > instance of the DataEngine running globally on that system. > Luckily that does not have to concern us as we need at least one, ie. "one or more", so we should be fine :) Thank you -- Marty K.
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