[Top bar] Subpixel rendering not working in Radiance theme

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If you reassign bugs to something, please at least figure out what you are reassigning the bug to and if that makes sense :|

Confirming the rendering issue when using Unity 2D and Radiance.

it looks like we are not rendering background for labels that are not currently selected in a way that cairo/pango expects. Filling the image with Qt::transparent is not enough apparently.

I've added gtk_render_background and related styling code locally in IndicatorEntryWidget::updatePix() and to CroppedLabel::paintEvent as a stopgap and found that it fixes the issue - http://ubuntuone.com/3Du1qgddWLHeHUdxXHY2ND and this has nothing to do with the Radiance theme itself.

I know unity-2d is no longer developed but in case somebody is looking for the reason - that may be it.

I hope that's also the reason of bug 723167 in Unity/Compiz too.

FWIW, the patch is attached and the patched unity-2d version is being built in https://launchpad.net/~rye/+archive/ppa

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As I wrote in a neighbor https://bugs.launchpad.net/ayatana-design/+bug/723167/comments/24, we either need to fix cairo or draw background for all labels, we can't use empty/transparent CAIRO_FORMAT_ARGB32 because it makes cairo draw weird antialiased artifacts.

It does not look like we can get a pixmap of the destination, so this patch just queries for HUD/Dash being open and draws background if not. This is really bad as it makes indicatorentry aware of the dash and hud (and it don't really need that knowledge) but it is as far as I could get.