x11-misc/qt5ct: make system tray support optional

Gentoo-Bug: https://bugs.gentoo.org/599950
Closes: https://github.com/gentoo/gentoo/pull/2855

Package-Manager: portage-2.3.2

x11-misc/qt5ct/metadata.xml

@@ -13,6 +13,9 @@
 		This program allows users to configure Qt5 settings (theme, font,
 		icons, etc.) under DE/WM without Qt5 integration.
 	</longdescription>
+	<use>
+		<flag name="systray">Enable system tray support</flag>
+	</use>
 	<upstream>
 		<remote-id type="sourceforge">qt5ct</remote-id>
 	</upstream>

x11-misc/qt5ct/qt5ct-0.27-r1.ebuild

@@ -0,0 +1,50 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit qmake-utils
+
+DESCRIPTION="Qt5 configuration tool, similar to qtconfig for Qt4"
+HOMEPAGE="https://sourceforge.net/projects/qt5ct/"
+SRC_URI="mirror://sourceforge/${PN}/${P}.tar.bz2"
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="+systray"
+
+RDEPEND="
+	dev-qt/qtcore:5
+	dev-qt/qtgui:5=
+	dev-qt/qtwidgets:5
+	systray? ( dev-qt/qtgui:5[dbus] )
+"
+DEPEND="${RDEPEND}
+	dev-qt/linguist-tools:5
+"
+
+src_configure() {
+	eqmake5 DEFINES="$(usex systray '' QT_NO_SYSTEMTRAYICON)" ${PN}.pro
+}
+
+src_install() {
+	emake INSTALL_ROOT="${D}" install
+	einstalldocs
+
+	echo 'QT_QPA_PLATFORMTHEME=qt5ct' > "${T}"/98${PN} || die
+	doenvd "${T}"/98${PN}
+}
+
+pkg_postinst() {
+	if [[ -z ${REPLACING_VERSIONS} ]]; then
+		ewarn "qt5ct configuration won't be applied to the currently running sessions."
+		ewarn "Please relogin."
+	fi
+	if ! has_version 'dev-qt/qtsvg:5'; then
+		echo
+		elog "For SVG icon themes, please install 'dev-qt/qtsvg:5'."
+		echo
+	fi
+}