From a5dff947d9d82a3242651028d2d89e540c73486e Mon Sep 17 00:00:00 2001
From: Sander Speetjens <sander.speetjens@gmail.com>
Date: Tue, 6 Jan 2026 20:59:50 +0100
Subject: [PATCH] examples playground

exclude when used as a submodule
---
 examples/CMakeLists.txt   | 52 ++++++++++++++++++++------------------
 playground/CMakeLists.txt | 53 ++++++++++++++++++++-------------------
 2 files changed, 54 insertions(+), 51 deletions(-)

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index e006ba1..de6d5df 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,34 +1,36 @@
 find_package(Qt6 REQUIRED COMPONENTS Widgets)
 file(GLOB SUBDIRS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "${CMAKE_CURRENT_SOURCE_DIR}/*")
 
-foreach(SUBDIR ${SUBDIRS})
-    if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR})
-        file(GLOB SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.h")
+if (PROJECT_IS_TOP_LEVEL)
+    foreach(SUBDIR ${SUBDIRS})
+        if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR})
+            file(GLOB SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.h")
 
-        if(SOURCES)
-            add_executable(${SUBDIR} ${SOURCES})
+            if(SOURCES)
+                add_executable(${SUBDIR} ${SOURCES})
 
-            target_include_directories(${SUBDIR} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR} ${PROJECT_BINARY_DIR}/)
+                target_include_directories(${SUBDIR} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR} ${PROJECT_BINARY_DIR}/)
 
-            target_compile_definitions(${SUBDIR}
-                PRIVATE
-                "QWT_MOC_INCLUDE"
-            )
-
-            set_target_properties(
-                ${SUBDIR}
-                PROPERTIES
-                    AUTOMOC ON
-            )
-
-            target_link_libraries(${SUBDIR} qwt Qt${QT_VERSION_MAJOR}::Widgets)
-
-            if(NOT QWT_BUILD_EXAMPLES)
-                set_target_properties(${SUBDIR} PROPERTIES
-                    EXCLUDE_FROM_ALL TRUE
-                    EXCLUDE_FROM_DEFAULT_BUILD TRUE  # mainly for Visual Studio
+                target_compile_definitions(${SUBDIR}
+                    PRIVATE
+                    "QWT_MOC_INCLUDE"
                 )
+
+                set_target_properties(
+                    ${SUBDIR}
+                    PROPERTIES
+                        AUTOMOC ON
+                )
+
+                target_link_libraries(${SUBDIR} qwt Qt${QT_VERSION_MAJOR}::Widgets)
+
+                if(NOT QWT_BUILD_EXAMPLES)
+                    set_target_properties(${SUBDIR} PROPERTIES
+                        EXCLUDE_FROM_ALL TRUE
+                        EXCLUDE_FROM_DEFAULT_BUILD TRUE  # mainly for Visual Studio
+                    )
+                endif()
             endif()
         endif()
-    endif()
-endforeach()
+    endforeach()
+endif()
\ No newline at end of file
diff --git a/playground/CMakeLists.txt b/playground/CMakeLists.txt
index d7ee30e..8baaa89 100644
--- a/playground/CMakeLists.txt
+++ b/playground/CMakeLists.txt
@@ -1,33 +1,34 @@
 file(GLOB SUBDIRS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "${CMAKE_CURRENT_SOURCE_DIR}/*")
+if (PROJECT_IS_TOP_LEVEL)
+    foreach(SUBDIR ${SUBDIRS})
+        if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR})
+            file(GLOB SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.h")
 
-foreach(SUBDIR ${SUBDIRS})
-    if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR})
-        file(GLOB SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/*.h")
+            if(SOURCES)
+                add_executable(${SUBDIR} ${SOURCES})
 
-        if(SOURCES)
-            add_executable(${SUBDIR} ${SOURCES})
+                target_include_directories(${SUBDIR} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR} ${PROJECT_BINARY_DIR}/)
 
-            target_include_directories(${SUBDIR} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR} ${PROJECT_BINARY_DIR}/)
-
-            target_compile_definitions(${SUBDIR}
-                PRIVATE
-                "QWT_MOC_INCLUDE"
-            )
-
-            set_target_properties(
-                ${SUBDIR}
-                PROPERTIES
-                    AUTOMOC ON
-            )
-
-            target_link_libraries(${SUBDIR} qwt)
-
-            if(NOT QWT_BUILD_PLAYGROUND)
-                set_target_properties(${SUBDIR} PROPERTIES
-                    EXCLUDE_FROM_ALL TRUE
-                    EXCLUDE_FROM_DEFAULT_BUILD TRUE  # mainly for Visual Studio
+                target_compile_definitions(${SUBDIR}
+                    PRIVATE
+                    "QWT_MOC_INCLUDE"
                 )
+
+                set_target_properties(
+                    ${SUBDIR}
+                    PROPERTIES
+                        AUTOMOC ON
+                )
+
+                target_link_libraries(${SUBDIR} qwt)
+
+                if(NOT QWT_BUILD_PLAYGROUND)
+                    set_target_properties(${SUBDIR} PROPERTIES
+                        EXCLUDE_FROM_ALL TRUE
+                        EXCLUDE_FROM_DEFAULT_BUILD TRUE  # mainly for Visual Studio
+                    )
+                endif()
             endif()
         endif()
-    endif()
-endforeach()
+    endforeach()
+endif()
\ No newline at end of file