# HG changeset patch
# User Hasan Yavuz ÖZDERYA <hy@ozderya.net>
# Date 2017-03-11 10:17:53
# Node ID 38669ef60576f364433466be628f81a0c12f2c2a
# Parent  c3296528103cb11bfc2a1e4a561f3acf5e243a40

add find script for ledwidget library

diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,10 +55,16 @@ else (BUILD_QWT)
 endif (BUILD_QWT)
 
 include(BuildQColorWidgets)
-include(BuildLedWidget)
+
+set(BUILD_LEDWIDGET true CACHE BOOL "Download and build LedWidget automatically.")
+if (BUILD_LEDWIDGET)
+  include(BuildLedWidget)
+else (BUILD_LEDWIDGET)
+  include(FindLedWidget)
+endif (BUILD_LEDWIDGET)
 
 # includes
-include_directories("./src" ${QWT_INCLUDE_DIR} ${QCW_INCLUDE_DIR} ${LEDW_INCLUDE_DIR})
+include_directories("./src" ${QWT_INCLUDE_DIR} ${QCW_INCLUDE_DIR} ${LEDWIDGET_INCLUDE_DIR})
 
 # flags
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${QCW_FLAGS}")
@@ -134,13 +140,18 @@ add_executable(${PROGRAM_NAME} WIN32
   )
 
 # Use the Widgets module from Qt 5.
-target_link_libraries(${PROGRAM_NAME} ${QWT_LIBRARY} ${QCW_LIBRARY} ${LEDW_LIBRARY})
+target_link_libraries(${PROGRAM_NAME} ${QWT_LIBRARY} ${QCW_LIBRARY} ${LEDWIDGET_LIBRARY})
 qt5_use_modules(${PROGRAM_NAME} Widgets SerialPort)
 
+# external project dependencies
 if (BUILD_QWT)
-  add_dependencies(${PROGRAM_NAME} QWT LEDW)
+  add_dependencies(${PROGRAM_NAME} QWT)
 endif (BUILD_QWT)
 
+if (BUILD_LEDWIDGET)
+  add_dependencies(${PROGRAM_NAME} LEDW)
+endif (BUILD_LEDWIDGET)
+
 # set compiler flags
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
 
diff --git a/cmake/modules/BuildLedWidget.cmake b/cmake/modules/BuildLedWidget.cmake
--- a/cmake/modules/BuildLedWidget.cmake
+++ b/cmake/modules/BuildLedWidget.cmake
@@ -26,6 +26,5 @@ ExternalProject_Add(LEDW
   INSTALL_COMMAND "")
 
 ExternalProject_Get_Property(LEDW binary_dir source_dir)
-set(LEDW_INCLUDE_DIR ${source_dir}/src)
-message(${LEDW_INCLUDE_DIR})
-set(LEDW_LIBRARY ${binary_dir}/libledwidget.a)
+set(LEDWIDGET_INCLUDE_DIR ${source_dir}/src)
+set(LEDWIDGET_LIBRARY ${binary_dir}/libledwidget.a)
diff --git a/cmake/modules/FindLedWidget.cmake b/cmake/modules/FindLedWidget.cmake
new file mode 100644
--- /dev/null
+++ b/cmake/modules/FindLedWidget.cmake
@@ -0,0 +1,25 @@
+#
+# Copyright © 2017 Hasan Yavuz Özderya
+#
+# This file is part of serialplot.
+#
+# serialplot is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# serialplot is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+find_library(LEDWIDGET_LIBRARY "ledwidget")
+find_path(LEDWIDGET_INCLUDE_DIR "ledwidget.h" PATH_SUFFIXES "ledwidget")
+
+mark_as_advanced(LEDWIDGET_LIBRARY LEDWIDGET_INCLUDE_DIR)
+
+find_package_handle_standard_args(LedWidget DEFAULT_MSG LEDWIDGET_LIBRARY LEDWIDGET_INCLUDE_DIR)