commctrl: modularize progress drawing

[Frank Richter]

Frank Richter <frank.richter at gmail.com>
Split up the drawing code into a set of smaller functions and also moved
some common computations into helper functions. All that to facilitate
the implementation of the forthcoming theming support.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: progress-draw.diff
Type: text/x-patch
Size: 20559 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20050726/7e3f3f90/progress-draw.bin