When switching theme, some icons don't change: those that are created in some QWidget's constructors and set once for all.
Solution
Qt stores all images in QPixmapCache and the key for a given QPixmap is documented (it's a combination of size and more properties). The idea is to replace the QPixmaps directly in the cache by correctly colorized ones (according to theme colors).
Issue
When switching theme, some icons don't change: those that are created in some QWidget's constructors and set once for all.
Solution
Qt stores all images in
QPixmapCacheand the key for a givenQPixmapis documented (it's a combination of size and more properties). The idea is to replace theQPixmapsdirectly in the cache by correctly colorized ones (according to theme colors).