K_EXPORT_PLUGIN

[Sebastian Kügler]

On Monday, February 25, 2013 17:38:09 Aaron J. Seigo wrote:
> in kexportplugin.h there is this:
> 
> #pragma message("K_EXPORT_PLUGIN is defined as a hack here, for compat. Port
> to new plugin system (QT_PLUGIN_METADATA) instead.")
> 
> this was introduced in the first revision of this file (58606a42).
> 
> i haven't been able to find any useful information online about this
> QT_PLUGIN_METADATA thing. currently when compiling libplasma2 we get screen
> after screen of this message, and i 'd like to get rid of it.
> 
> can somene point me in a useful direction? thanks.

>From my rather limited understanding: 

The macro has changed, we're now supposed to use QT_PLUGIN_METADATA, which 
defines that "class of plugin" you're writing. This macro moves into the class 
itself (usually along with the Q_OBJECT macro). You can specify a json file 
with additional metadata with it, but that's optional.

The Plasma declarative imports use this already, it seems to work fine and is 
maybe a little easier than the previous solution, but you're right, it's not 
really well-documented so far, and there are not a lof of examples. I found 
out mainly be grepping through the Qt sources. For example, I've no idea how 
to add additional plugin types, or how to apply this knowledge to other plugin 
types.

Hope that helps a bit ... (or at least triggers someone to rectify with more 
reliable / complete information ;)) ?

Cheers,
-- 
sebas

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