I have a large geology data set that I need to display using an industry standard set of symbols and colours. The symbols and colours are attributes of the data. I have been using the data defined symbols capability of the dev build of QGIS (code revision b805894) to display the data according to its attributes. This works perfectly in terms of displaying the data correctly in the map window.
The problem arises when I try to create a legend in the composer. The data-defined colours displayed on the map don't pull through to the legend.
Here are some screens shots. The first shows the map window. You can see the problem manifesting in the Layers box on the left. The symbols are all coloured black.
The second screen shot shows the composer window with a legend.
Thanks in advance