drop optional Qt4 dependence

Package-Manager: Portage-2.3.19, Repoman-2.3.6

dev-python/pyqtgraph/files/pyqtgraph-0.10.0-qt5.patch

@@ -0,0 +1,10 @@
+diff -r -U2 pyqtgraph-0.10.0.orig/pyqtgraph/Qt.py pyqtgraph-0.10.0/pyqtgraph/Qt.py
+--- pyqtgraph-0.10.0.orig/pyqtgraph/Qt.py	2016-10-17 23:22:41.000000000 +0700
++++ pyqtgraph-0.10.0/pyqtgraph/Qt.py	2018-01-23 22:52:19.503525554 +0700
+@@ -25,5 +25,5 @@
+ ## is already imported. If not, then attempt to import PyQt4, then PySide.
+ if QT_LIB is None:
+-    libOrder = [PYQT4, PYSIDE, PYQT5]
++    libOrder = [PYQT5]
+ 
+     for lib in libOrder:

dev-python/pyqtgraph/metadata.xml

@@ -5,6 +5,13 @@
     <email>python@gentoo.org</email>
     <name>Python</name>
   </maintainer>
+  <longdescription>
+    PyQtGraph is a pure-python graphics and GUI library built on PyQt and numpy.
+    It is intended for use in mathematics / scientific / engineering applications.
+    Despite being written entirely in python, the library is very fast
+    due to its heavy leverage of numpy for number crunching
+    and Qt's GraphicsView framework for fast display. 
+  </longdescription>
   <upstream>
     <remote-id type="github">pyqtgraph/pyqtgraph</remote-id>
   </upstream>

dev-python/pyqtgraph/pyqtgraph-0.10.0-r1.ebuild

@@ -0,0 +1,47 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+PYTHON_COMPAT=( python{2_7,3_4,3_5,3_6} )
+inherit distutils-r1
+
+DESCRIPTION="A pure-python graphics and GUI library built on PyQt and numpy"
+HOMEPAGE="http://www.pyqtgraph.org/ https://pypi.python.org/pypi/pyqtgraph/"
+SRC_URI="http://www.pyqtgraph.org/downloads/${PV}/${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples opengl svg"
+
+RDEPEND="dev-python/numpy[${PYTHON_USEDEP}]
+	sci-libs/scipy[${PYTHON_USEDEP}]
+	dev-python/PyQt5[gui,widgets,opengl=,svg=,${PYTHON_USEDEP}]
+	opengl? ( dev-python/pyopengl[${PYTHON_USEDEP}] )"
+DEPEND="${RDEPEND}
+	dev-python/setuptools[${PYTHON_USEDEP}]
+	doc? ( dev-python/sphinx[${PYTHON_USEDEP}] )"
+
+PATCHES=( "${FILESDIR}"/${P}-qt5.patch )
+S=${WORKDIR}/${PN}-${P}
+
+python_prepare_all() {
+	distutils-r1_python_prepare_all
+
+	# fix distutils warning
+	sed -i 's/install_requires/requires/' setup.py || die
+
+	if ! use opengl; then
+		rm -r pyqtgraph/opengl || die
+	fi
+}
+
+python_compile_all() {
+	use doc && emake -C doc html
+}
+
+python_install_all() {
+	use doc && local HTML_DOCS=( doc/build/html/. )
+	use examples && dodoc -r examples
+	distutils-r1_python_install_all
+}