graphics/microwindows: add Nano-X client/server support and examples for NuttX

Make.defs

@@ -130,6 +130,18 @@ endif
 CFLAGS   += ${INCDIR_PREFIX}"$(APPDIR)$(DELIM)include"
 CXXFLAGS += ${INCDIR_PREFIX}"$(APPDIR)$(DELIM)include"
 
+# EXPORTED_INCLUDES lists include directories that must be available to
+# applications built out of tree from the NuttX export package.  Each
+# entry is prefixed with ${INCDIR_PREFIX} (i.e. -I<dir>) and is added
+# to CFLAGS/CXXFLAGS so that it takes effect in the in-tree build as
+# well.  The content of the listed directories is copied to the include
+# directory of the export package by the export target in apps/Makefile.
+# Components should append their public include directories in their
+# Make.defs.
+
+CFLAGS   += $(EXPORTED_INCLUDES)
+CXXFLAGS += $(EXPORTED_INCLUDES)
+
 NUTTXLIB ?= $(call CONVERT_PATH,$(TOPDIR)$(DELIM)staging)
 
 # SPLITVARIABLE - Split long variables into specified batches

Makefile

@@ -206,6 +206,13 @@ ifneq ($(BUILTIN_REGISTRY),)
 	done
 endif
 endif
+	$(Q) for inc in $(EXPORTED_INCLUDES) ; do \
+		inc=$${inc#"$(INCDIR_PREFIX)"}; \
+		if [ -d "$${inc}" ]; then \
+			mkdir -p "${EXPORTDIR}"$(DELIM)include || exit 1; \
+			cp -Rf "$${inc}"$(DELIM). "${EXPORTDIR}"$(DELIM)include || exit 1; \
+		fi \
+	done
 endif
 
 .depdirs: $(foreach SDIR, $(CONFIGURED_APPS), $(SDIR)_depend)

examples/nanoxcalc/Kconfig

@@ -0,0 +1,28 @@
+config EXAMPLES_NANOXCALC
+	tristate "Nano-X calculator example"
+	default n
+	depends on MICROWINDOWS_NANOX && LIBC_FLOATINGPOINT
+	---help---
+		Enable the Nano-X calculator example application.  It is a
+		port of the nxcalc demo from Microwindows which connects to
+		the Nano-X server started by examples/nanoxterm and shows
+		a calculator keypad operated by the mouse or keyboard.
+
+if EXAMPLES_NANOXCALC
+
+config EXAMPLES_NANOXCALC_PROGNAME
+	string "Program name"
+	default "nanoxcalc"
+	---help---
+		This is the name of the program that will be used when the NSH ELF
+		program is installed.
+
+config EXAMPLES_NANOXCALC_PRIORITY
+	int "Nano-X calculator task priority"
+	default 100
+
+config EXAMPLES_NANOXCALC_STACKSIZE
+	int "Nano-X calculator stack size"
+	default 16384
+
+endif

examples/nanoxcalc/Make.defs

@@ -0,0 +1,25 @@
+############################################################################
+# apps/examples/nanoxcalc/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifneq ($(CONFIG_EXAMPLES_NANOXCALC),)
+CONFIGURED_APPS += $(APPDIR)/examples/nanoxcalc
+endif

examples/nanoxcalc/Makefile

@@ -0,0 +1,35 @@
+############################################################################
+# apps/examples/nanoxcalc/Makefile
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+PROGNAME  = $(CONFIG_EXAMPLES_NANOXCALC_PROGNAME)
+PRIORITY  = $(CONFIG_EXAMPLES_NANOXCALC_PRIORITY)
+STACKSIZE = $(CONFIG_EXAMPLES_NANOXCALC_STACKSIZE)
+MODULE    = $(CONFIG_EXAMPLES_NANOXCALC)
+
+# Port of the upstream nxcalc demo (src/demos/nanox/nxcalc.c)
+MAINSRC = nxcalc.c
+CFLAGS += -Wno-undef
+
+
+include $(APPDIR)/Application.mk