On Mon, Jan 23, 2017 at 09:14:25AM +0100, Jean-Marc Lasgouttes wrote: > Le 22/01/2017 à 01:22, Enrico Forestieri a écrit : > > commit 9e6cf6e05a25d38e8d7d9ecbf360b2aa5fd06d03 > > Author: Enrico Forestieri <for...@lyx.org> > > Date: Sun Jan 22 01:06:00 2017 +0100 > > > > Allow to properly scale the GUI with Qt5 > > > > Starting with Qt 5.6, setting the environment variable QT_SCALE_FACTOR > > makes everything accordingly bigger. So, if QT_SCALE_FACTOR=1.2, all > > text and GUI elements are rendered 20% bigger. However, if an > > application > > does not account for this, everything will also look "blocky". > > With this commit, all text and images will be scaled remaining sharp. > > This works whether a HiDpi screen is used or not, but is mostly useful > > with a HiDpi screen, as all GUI elements are more spaced apart and one > > can use the mouse for selecting things without requiring a high > > precision. > > Nice. Do you know whether some linux environments set that automatically?
I don't think so. They would risk breaking some programs. > Two remarks: > * I would think that the code that reads the environment variable should > only be active in Qt 5.6+ Yes, you are probably right. I did not do that because I would have liked to test what could happen with an earlier version but then forgot. > * As I understand it, this code does not handle multiple monitors with > different DPI. I am not sure that the rest of LyX does that either. I don't think so. If you have such a setup, you could test what happens using the environment variable QT_SCREEN_SCALE_FACTORS. -- Enrico
