Warning for the newer theme system should give more clear info to the developers

[Didier Roche-Tolomelli]

Importing Ubuntu.Components 1.2 in wily (not sure why I didn't noticed it on vivid), triggers a lot of style related warnings, like:

"file:///home/didrocks/work/ubuntu-sdk/splitthebill/splitthebill/components/AddRemoveInt.qml:39:5: QML TextField: Theme.createStyleComponent() is deprecated. Use ThemeSettings instead."

That's nice to get those warnings, however, more practical actions (like why? how to transition) with link reference would be helpful.
I don't know either what to do from here.

[Zsombor Egri (zsombi)]

The problem is that it shouldn't trigger on 1.2, as there it is not deprecated. Unfortunately QML versioning system does not give us any help on detecting the version the component is used in.

[Cris Dywan (kalikiana)]

The 1.2 aspect of it is bug 1467851 - more specifically here, we should try to make the message more helpful in suggesting what code to change, namely using styleName, which is valid as of 1.3.