Enable setting the origin point of the fill level
Submitted by Stefan Sauer (gstreamer, gtkdoc dev)
Link to original bug (#511470)
Description
Some themes like clearlooks, clearlooks classic, darkilouche, ... draw a colored bar inside the GtkRange from the left to the slider position. I have a panorama position slider in my music application. The underlying GtkAdjustment goes from -1.0 to 1.0 (left to right). There this color bar looks really odd. Unfortunately the GtkAdjustment has no default/middle value.
If the theme wants to draw this, what about this: min,max are positive, start from left min,max are negative, start from right min,max have different signs, start from 0.0
invert everything for RTL languagages, and do simmilar for vertical ranges.
Version: 2.12.x