Qt4 is dead and going away, is there any upstream activity towards porting to Qt5?
JFYI: upstream claims it can be built with both qt4 (>=4.4.0) and qt5 (tested with 5.2): https://github.com/barak/djview4. This looks relevant for version 4.10.6, so it's only a matter of fixing ebuild.
The bug has been closed via the following commit(s):
Author: Andreas Sturmlechner <email@example.com>
AuthorDate: 2017-12-09 19:53:37 +0000
Commit: Andreas Sturmlechner <firstname.lastname@example.org>
CommitDate: 2017-12-09 21:10:01 +0000
app-text/djview: Switch to Qt5
Package-Manager: Portage-2.3.17, Repoman-2.3.6
app-text/djview/djview-4.10.6-r1.ebuild | 83 +++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)