Tools: [skip ci] CMake support of plugin for Qt Designer

src/Tools/plugins/widget/CMakeLists.txt

@@ -0,0 +1,36 @@
+project(FreeCAD_widgets)
+cmake_minimum_required(VERSION 3.2.0)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOMOC ON)
+
+find_package(Qt5Widgets REQUIRED)
+find_package(Qt5Designer REQUIRED)
+
+include_directories(
+    ${Qt5Core_INCLUDE_DIRS}
+    ${Qt5Widgets_INCLUDE_DIRS}
+    ${Qt5Designer_INCLUDE_DIRS}
+)
+
+add_library(FreeCAD_widgets SHARED
+    customwidgets.cpp
+    customwidgets.h
+    plugin.cpp
+    plugin.h
+)
+
+target_link_libraries(FreeCAD_widgets PRIVATE ${Qt5Widgets_LIBRARIES} ${Qt5Designer_LIBRARIES})
+target_compile_options(FreeCAD_widgets PRIVATE ${COMPILE_OPTIONS})
+
+# Get the install location of a plugin to determine the path to designer plguins
+get_target_property(WEBENGINE_PLUGIN_LOCATION Qt5::QWebEngineViewPlugin LOCATION)
+get_filename_component(DESIGNER_PLUGIN_LOCATION ${WEBENGINE_PLUGIN_LOCATION} DIRECTORY)
+message(STATUS "Plugin will installed to: ${DESIGNER_PLUGIN_LOCATION}")
+
+# Override the CMake variable
+set(CMAKE_INSTALL_PREFIX ${DESIGNER_PLUGIN_LOCATION} CACHE PATH "Install path to Qt Designer plugins" FORCE)
+
+INSTALL(TARGETS FreeCAD_widgets
+    LIBRARY DESTINATION ${DESIGNER_PLUGIN_LOCATION}
+)