package/python-matplotlib: add QT5 support

python-matplotlib may be used in qt5 application. This patch add option to
enable qt5. Since this backend is automatically enabled when pyqt5 is detected,
list dependencies is simply an updated (no enable/disable options).

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/python-matplotlib/Config.in

@@ -23,6 +23,18 @@ config BR2_PACKAGE_PYTHON_MATPLOTLIB
 
 	  https://matplotlib.org/
 
+if BR2_PACKAGE_PYTHON_MATPLOTLIB
+
+config BR2_PACKAGE_PYTHON_MATPLOTLIB_QT
+	bool "qt display"
+	depends on BR2_PACKAGE_QT5 # python-pyqt5
+	select BR2_PACKAGE_PYTHON_PYQT5
+	select BR2_PACKAGE_QT5BASE
+	select BR2_PACKAGE_QT5BASE_FONTCONFIG
+	select BR2_PACKAGE_QT5BASE_WIDGETS
+
+endif
+
 comment "python-matplotlib needs a toolchain w/ C++"
 	depends on !BR2_INSTALL_LIBSTDCPP
 

package/python-matplotlib/python-matplotlib.mk

@@ -13,4 +13,8 @@ PYTHON_MATPLOTLIB_DEPENDENCIES = host-pkgconf freetype host-python-numpy \
 	libpng python-cycler
 PYTHON_MATPLOTLIB_SETUP_TYPE = setuptools
 
+ifeq ($(BR2_PACKAGE_PYTHON_MATPLOTLIB_QT),y)
+PYTHON_MATPLOTLIB_DEPENDENCIES += python-pyqt5
+endif
+
 $(eval $(python-package))