add application file icon for macos

src/qtviewer/CMakeLists.txt

@@ -41,6 +41,16 @@ set(RESOURCE_FILES
     resources/qt_res.rc
 )
 
+# The MACOSX_BUNDLE_ICON_FILE variable is added to the Info.plist
+# generated by CMake. This variable contains the .icns file name,
+# without the path.
+set(MACOSX_BUNDLE_ICON_FILE ifcosLogo.icns)
+
+# The following tells CMake where to find and install the file itself.
+set(app_icon_macos "resources/ifcosLogo.icns")
+set_source_files_properties(${app_icon_macos} PROPERTIES
+        MACOSX_PACKAGE_LOCATION "Resources")
+
 add_executable(${targetName}
     IfcViewerWidget.h
     IfcViewerWidget.cpp
@@ -50,6 +60,7 @@ add_executable(${targetName}
     MainWindow.cpp
     main.cpp
     ${RESOURCE_FILES}
+    ${app_icon_macos}
 )
 
 set_target_properties(${targetName} PROPERTIES