FindQwt returns qwt verison

This can be used to check compatibility

CMakeLists.txt

@@ -2,14 +2,14 @@ cmake_minimum_required(VERSION 2.8)
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
 
 find_package(Qt4)
-find_package(Qwt)
+find_package(Qwt 6)
 find_package(CBF)
 find_package(Doxygen)
 
 add_subdirectory(slsDetectorSoftware)
 add_subdirectory(slsReceiverSoftware)
 add_subdirectory(slsImageReconstruction)
-if (QWT_FOUND)
+if (QWT_FOUND AND QWT_VERSION_STRING VERSION_LESS 6.1)
     add_subdirectory(slsDetectorGui)
 endif()
 

cmake/FindQwt.cmake

@@ -1,19 +1,118 @@
-FIND_PATH (QWT_INCLUDE_DIR 
+# Qt Widgets for Technical Applications
-    NAMES 
+# available at http://www.http://qwt.sourceforge.net/
-        qwt.h 
+#
-    HINTS
+# The module defines the following variables:
-        $ENV{QWTDIR}/src
+#  QWT_FOUND - the system has Qwt
-        /usr/include/qwt
+#  QWT_INCLUDE_DIR - where to find qwt_plot.h
+#  QWT_INCLUDE_DIRS - qwt includes
+#  QWT_LIBRARY - where to find the Qwt library
+#  QWT_LIBRARIES - aditional libraries
+#  QWT_MAJOR_VERSION - major version
+#  QWT_MINOR_VERSION - minor version
+#  QWT_PATCH_VERSION - patch version
+#  QWT_VERSION_STRING - version (ex. 5.2.1)
+#  QWT_ROOT_DIR - root dir (ex. /usr/local)
+
+#=============================================================================
+# Copyright 2010-2013, Julien Schueller
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met: 
+# 
+# 1. Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer. 
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution. 
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# The views and conclusions contained in the software and documentation are those
+# of the authors and should not be interpreted as representing official policies, 
+# either expressed or implied, of the FreeBSD Project.
+#=============================================================================
+
+
+find_path ( QWT_INCLUDE_DIR
+  NAMES qwt_plot.h
+  HINTS $ENV{QWTDIR} $ENV{QWTDIR}/src ${QT_INCLUDE_DIR}
+  PATH_SUFFIXES qwt qwt-qt3 qwt-qt4 qwt-qt5
 )
 
-FIND_LIBRARY (QWT_LIBRARY
+set ( QWT_INCLUDE_DIRS ${QWT_INCLUDE_DIR} )
-    NAMES qwt
+
-    HINTS
+# version
-        $ENV{QWTDIR}/lib
+set ( _VERSION_FILE ${QWT_INCLUDE_DIR}/qwt_global.h )
+if ( EXISTS ${_VERSION_FILE} )
+  file ( STRINGS ${_VERSION_FILE} _VERSION_LINE REGEX "define[ ]+QWT_VERSION_STR" )
+  if ( _VERSION_LINE )
+    string ( REGEX REPLACE ".*define[ ]+QWT_VERSION_STR[ ]+\"(.*)\".*" "\\1" QWT_VERSION_STRING "${_VERSION_LINE}" )
+    string ( REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\1" QWT_MAJOR_VERSION "${QWT_VERSION_STRING}" )
+    string ( REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\2" QWT_MINOR_VERSION "${QWT_VERSION_STRING}" )
+    string ( REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\3" QWT_PATCH_VERSION "${QWT_VERSION_STRING}" )
+  endif ()
+endif ()
+
+
+# check version
+set ( _QWT_VERSION_MATCH TRUE )
+if ( Qwt_FIND_VERSION AND QWT_VERSION_STRING )
+  if ( Qwt_FIND_VERSION_EXACT )
+    if ( NOT Qwt_FIND_VERSION VERSION_EQUAL QWT_VERSION_STRING )
+      set ( _QWT_VERSION_MATCH FALSE )
+    endif ()
+  else ()
+    if ( QWT_VERSION_STRING VERSION_LESS Qwt_FIND_VERSION )
+      set ( _QWT_VERSION_MATCH FALSE )
+    endif ()
+  endif ()
+endif ()
+
+
+find_library ( QWT_LIBRARY
+  NAMES qwt qwt-qt3 qwt-qt4 qwt-qt5
+  HINTS $ENV{QWTDIR}/lib ${QT_LIBRARY_DIR}
 )
 
-SET (QWT_LIBRARIES ${QWT_LIBRARY})
+set ( QWT_LIBRARIES ${QWT_LIBRARY} )
 
-INCLUDE ( FindPackageHandleStandardArgs )
-FIND_PACKAGE_HANDLE_STANDARD_ARGS( QWT DEFAULT_MSG QWT_LIBRARIES QWT_INCLUDE_DIR )
 
+# try to guess root dir from include dir
+if ( QWT_INCLUDE_DIR )
+  string ( REGEX REPLACE "(.*)/include.*" "\\1" QWT_ROOT_DIR ${QWT_INCLUDE_DIR} )
+# try to guess root dir from library dir
+elseif ( QWT_LIBRARY )
+  string ( REGEX REPLACE "(.*)/lib[/|32|64].*" "\\1" QWT_ROOT_DIR ${QWT_LIBRARY} )
+endif ()
+
+
+# handle the QUIETLY and REQUIRED arguments
+include ( FindPackageHandleStandardArgs )
+if ( CMAKE_VERSION LESS 2.8.3 )
+  find_package_handle_standard_args( Qwt DEFAULT_MSG QWT_LIBRARY QWT_INCLUDE_DIR _QWT_VERSION_MATCH )
+else ()
+  find_package_handle_standard_args( Qwt REQUIRED_VARS QWT_LIBRARY QWT_INCLUDE_DIR _QWT_VERSION_MATCH VERSION_VAR QWT_VERSION_STRING )
+endif ()
+
+
+mark_as_advanced (
+  QWT_LIBRARY 
+  QWT_LIBRARIES
+  QWT_INCLUDE_DIR
+  QWT_INCLUDE_DIRS
+  QWT_MAJOR_VERSION
+  QWT_MINOR_VERSION
+  QWT_PATCH_VERSION
+  QWT_VERSION_STRING
+  QWT_ROOT_DIR
+)