[Kde-imaging] KIPI initialization

[Lubos Lunak]

 Hello,

 during startup of Gwenview the initialization of KIPI plugins takes 1-2s on 
850MHz machine, which is a significant portion of the startup time. Probably 
not that big deal for apps like Digikam which are more of an image catalogue 
app, but it quite hurts for the case of running Gwenview only in order to 
view a single image. Initialization of KIPI plugins moreover is basically 
just loading the plugin and creating at most a handful of KAction's.

 The attached patches implement delayed loading of KIPI plugins in Gwenview 
and a small API change in KIPI needed for that (plus it depends on a recent 
KAccel change I did today in kdelibs). The API change is just making 
KIPI::PluginLoader::loadPlugin( KIPI::PluginLoader::Info* ) public, plus 
increasing the version number in order to be able to detect this (I don't 
actually care about the actual version number). Are the changes ok with you?

 (Gwenview part)

 I noticed the code for toolbars doesn't seem to handle plugins, so my code 
only handles the case of the plugins menu and shortcuts. If there's a way 
found to create also toolbar icons for KIPI plugins it shouldn't be too 
difficult to cache information needed also for that. Just the 
enabled/disabled state of the icon wouldn't follow, but I think that'd be 
just nitpicking. The patch also changes the default of --enable-kipi to 
autodetect whether KIPI plugins are available - I don't see any reason why it 
should default to off with this patch. Ok to commit?

-- 
Lubos Lunak
KDE developer
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