cmake: Update PythonQtGenerator to support only Qt5

Author: jcfr

generator/CMakeLists.txt

@@ -1,32 +1,38 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.5)
 
 #-----------------------------------------------------------------------------
 project(PythonQtGenerator)
 #-----------------------------------------------------------------------------
 
 include(CTestUseLaunchers OPTIONAL)
 
-#-----------------------------------------------------------------------------
-# Setup Qt
+#----------------------------------------------------------------------------
+# Qt version
 
-set(minimum_required_qt_version "4.6.2")
+# Set PythonQt_QT_VERSION
+set(PythonQt_QT_VERSION 5)
 
-find_package(Qt4)
+# Requirements
+set(minimum_required_qt5_version "5.15.2")
+set(minimum_required_qt_version ${minimum_required_qt${PythonQt_QT_VERSION}_version})
 
-if(QT4_FOUND)
+find_package(Qt5 ${minimum_required_qt_version} QUIET)
 
-  set(found_qt_version ${QT_VERSION_MAJOR}.${QT_VERSION_MINOR}.${QT_VERSION_PATCH})
+#-----------------------------------------------------------------------------
+# Setup Qt
 
-  if(${found_qt_version} VERSION_LESS ${minimum_required_qt_version})
-      message(FATAL_ERROR "error: PythonQt requires Qt >= ${minimum_required_qt_version} -- you cannot use Qt ${found_qt_version}.")
-  endif()
-  
-  set(QT_USE_QTXML ON)
-  
-  include(${QT_USE_FILE})
-else()
-  message(FATAL_ERROR "error: Qt4 was not found on your system. You probably need to set the QT_QMAKE_EXECUTABLE variable")
-endif()
+# Required components
+set(qt_required_components Core Xml Widgets)
+
+message(STATUS "${PROJECT_NAME}: Required Qt components [${qt_required_components}]")
+find_package(Qt5 ${minimum_required_qt_version} COMPONENTS ${qt_required_components} REQUIRED)
+
+set(QT_LIBRARIES )
+foreach(qtlib ${qt_required_components})
+  include_directories(${Qt5${qtlib}_INCLUDE_DIRS})
+  add_definitions(${Qt5${qtlib}_DEFINITIONS})
+  list(APPEND QT_LIBRARIES ${Qt5${qtlib}_LIBRARIES})
+endforeach()
 
 #-----------------------------------------------------------------------------
 # Sources
@@ -108,9 +114,9 @@ set(qrc_sources
 
 #-----------------------------------------------------------------------------
 # Do wrapping
-qt4_wrap_cpp(gen_moc_sources ${moc_sources})
-qt4_wrap_ui(gen_ui_sources ${ui_sources})
-qt4_add_resources(gen_qrc_sources ${qrc_sources})
+qt5_wrap_cpp(gen_moc_sources ${moc_sources})
+qt5_wrap_ui(gen_ui_sources ${ui_sources})
+qt5_add_resources(gen_qrc_sources ${qrc_sources})
 
 #-----------------------------------------------------------------------------
 # Copy file expected by the generator and specify install rules