From 1f40288aa3d04f1d20e5786405bb5edb171be01c Mon Sep 17 00:00:00 2001
From: Guillaume Damiand <guillaume.damiand@liris.cnrs.fr>
Date: Tue, 21 Jun 2016 11:20:28 +0200
Subject: [PATCH] Update cmakes in order to deal with install version of CGAL
 in header only mode.

---
 GraphicsView/src/CGAL_Qt5/CMakeLists.txt      |  9 +++-
 .../cmake/modules/CGALConfig_install.cmake.in | 48 +++++++++++++++++++
 Installation/src/CMakeLists.txt               |  9 +++-
 3 files changed, 63 insertions(+), 3 deletions(-)

diff --git a/GraphicsView/src/CGAL_Qt5/CMakeLists.txt b/GraphicsView/src/CGAL_Qt5/CMakeLists.txt
index db5a66028bd..5a5517ae805 100644
--- a/GraphicsView/src/CGAL_Qt5/CMakeLists.txt
+++ b/GraphicsView/src/CGAL_Qt5/CMakeLists.txt
@@ -84,7 +84,14 @@ endif(CGAL_HEADER_ONLY)
 collect_cgal_library( CGAL_Qt5 "${additional_files}")
 
 if(CGAL_HEADER_ONLY)
-   set(CGAL_QT5_QTMOCCMAKE_FILES ${QTMOCCMAKE_FILES} CACHE INTERNAL "CGAL qt5 qtmoc cmake files")
+  FILE(GLOB files "../../include/CGAL/Qt/*")
+  install(FILES ${files} DESTINATION "${CGAL_INSTALL_CMAKE_DIR}/include/CGAL/Qt/")
+  
+  FILE(GLOB files "../../demo/resources/*")
+  install(FILES ${files} DESTINATION "${CGAL_INSTALL_CMAKE_DIR}/demo/resources")
+  
+  FILE(GLOB files "../../demo/icons/*")
+  install(FILES ${files} DESTINATION "${CGAL_INSTALL_CMAKE_DIR}/demo/icons")
 else()
    qt5_use_modules(CGAL_Qt5 OpenGL Svg)
 
diff --git a/Installation/cmake/modules/CGALConfig_install.cmake.in b/Installation/cmake/modules/CGALConfig_install.cmake.in
index 53fa4cb05ab..c3bb1c2e9d5 100644
--- a/Installation/cmake/modules/CGALConfig_install.cmake.in
+++ b/Installation/cmake/modules/CGALConfig_install.cmake.in
@@ -45,6 +45,7 @@ set(CGAL_ImageIO_USE_ZLIB                 "@CGAL_ImageIO_USE_ZLIB@" )
 set(CGAL_VERSION "${CGAL_MAJOR_VERSION}.${CGAL_MINOR_VERSION}.${CGAL_BUILD_VERSION}")
 
 set(CGAL_USE_FILE "${CGAL_MODULES_DIR}/UseCGAL.cmake" )
+set(CGAL_GRAPHICSVIEW_PACKAGE_DIR "${CGAL_DIR}" CACHE INTERNAL "Directory containing the GraphicsView package")
 
 if ( CGAL_FIND_REQUIRED )
   set( CHECK_CGAL_COMPONENT_MSG_ON_ERROR TRUE        )
@@ -85,6 +86,53 @@ macro(check_cgal_component COMPONENT)
     if ( WITH_${CGAL_LIB} )
       if(TARGET CGAL::${CGAL_LIB} OR CGAL_HEADER_ONLY )
         set( ${CGAL_LIB}_FOUND TRUE )
+        if ("${CGAL_LIB}" STREQUAL "CGAL_Qt5")
+          find_package(OpenGL QUIET)
+          find_package(Qt5 COMPONENTS OpenGL Svg QUIET)
+
+          set(CGAL_Qt5_MISSING_DEPS "")
+          if(NOT Qt5OpenGL_FOUND)
+            set(CGAL_Qt5_MISSING_DEPS "Qt5OpenGL")
+          endif()
+          if(NOT Qt5Svg_FOUND)
+            set(CGAL_Qt5_MISSING_DEPS "${CGAL_Qt5_MISSING_DEPS} Qt5Svg")
+          endif()
+          if(NOT Qt5_FOUND)
+            set(CGAL_Qt5_MISSING_DEPS "${CGAL_Qt5_MISSING_DEPS} Qt5")
+          endif()
+          if(NOT OPENGL_FOUND)
+            set(CGAL_Qt5_MISSING_DEPS "${CGAL_Qt5_MISSING_DEPS} OpenGL")
+          endif()
+
+          if(CGAL_Qt5_MISSING_DEPS)
+            set( ${CGAL_LIB}_FOUND FALSE )
+            message(STATUS "Missing the dependencies: ${CGAL_Qt5_MISSING_DEPS} cannot be configured.")
+          else()
+            set( ${CGAL_LIB}_FOUND TRUE )
+            if (CGAL_HEADER_ONLY)
+              message("**************************** ${CGAL_GRAPHICSVIEW_PACKAGE_DIR}")
+              include("${CGAL_MODULES_DIR}/Use_CGAL_Qt5_headers.cmake")
+            endif()
+          endif()          
+        else()
+          if ("${CGAL_LIB}" STREQUAL "CGAL_ImageIO")
+            find_package( OpenGL QUIET )
+            find_package( ZLIB QUIET )
+
+            if(OPENGL_FOUND)
+              set( ${CGAL_LIB}_FOUND TRUE )
+            else(OPENGL_FOUND)
+              set( ${CGAL_LIB}_FOUND FALSE )
+              message(STATUS "Notice: ImageIO disabled because it requires OpenGL.")
+            endif(OPENGL_FOUND)
+          else()
+            # Librairies that have no dependencies
+            set( ${CGAL_LIB}_FOUND TRUE )
+          endif()
+        else()
+          # Librairies that have no dependencies
+          set( ${CGAL_LIB}_FOUND TRUE )
+        endif()
       else()
         set( ${CGAL_LIB}_FOUND FALSE )
         set( CHECK_${CGAL_LIB}_ERROR_TAIL " CGAL was configured with WITH_${CGAL_LIB}=ON, but one of the dependencies of ${CGAL_LIB} was not configured properly." )
diff --git a/Installation/src/CMakeLists.txt b/Installation/src/CMakeLists.txt
index 0808a914de1..9d50d60d304 100644
--- a/Installation/src/CMakeLists.txt
+++ b/Installation/src/CMakeLists.txt
@@ -80,6 +80,9 @@ function (collect_cgal_library LIBRARY_NAME ADDITIONAL_FILES)
     install(EXPORT ${LIBRARY_NAME}Exports
       DESTINATION "${CGAL_INSTALL_CMAKE_DIR}"
       NAMESPACE CGAL::)
+  else()
+    # Create an empty file (install mode) in order to be able to load it later
+    file(WRITE "${CMAKE_BINARY_DIR}/${LIBRARY_NAME}Exports.cmake" "")
   endif()
 
   # We have to call configure_file twice to force double expansion of variables.
@@ -200,9 +203,11 @@ CGAL_add_if_target(CGAL_Core)
 CGAL_add_if_target(CGAL_ImageIO)
 CGAL_add_if_target(CGAL_Qt5)
 
-#if (NOT CGAL_HEADER_ONLY) # TODO Check on windows these exports
+if (NOT CGAL_HEADER_ONLY)
   export(TARGETS ${CGAL_ACTUAL_CONFIGURED_LIBRARIES} NAMESPACE CGAL:: FILE "${CMAKE_BINARY_DIR}/CGALExports.cmake")
-#endif()
+else()
+  install(FILES "${CMAKE_BINARY_DIR}/CGALExports.cmake" DESTINATION ${CGAL_INSTALL_CMAKE_DIR})
+endif()
 
 message(STATUS "Sources for CGAL component libraries '${CGAL_CONFIGURED_LIBRARIES}' detected")