Allow to build examples as standalone project

Create CMake config files which can be used from the very same CMake
project. These CMake config files simply do not create any targets,
controlled via the QT_NO_CREATE_TARGETS.

This patch also allows to build qtbase.git:examples as a standalone
project, against an already-built Qt.

Ran this:
  ag -s "QT " examples -l -0 | xargs -0 -n 1 .../util/cmake/pro2cmake.py --is-example

Task-number: QTBUG-74713
Change-Id: I44cce5a4048618b30f890c5b789592c227a8b47d
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

6 files changed, 133 insertions, 81 deletions

diff --git a/examples/widgets/statemachine/eventtransitions/CMakeLists.txt b/examples/widgets/statemachine/eventtransitions/CMakeLists.txt
index 0fc20f59ae..758265686b 100644
--- a/examples/widgets/statemachine/eventtransitions/CMakeLists.txt
+++ b/examples/widgets/statemachine/eventtransitions/CMakeLists.txt
@@ -1,15 +1,26 @@
 # Generated from eventtransitions.pro.
 
-#####################################################################
-## eventtransitions Binary:
-#####################################################################
-
-add_qt_executable(eventtransitions
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/eventtransitions"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/eventtransitions"
-    SOURCES
-        main.cpp
-    LIBRARIES
-        Qt::Widgets
+cmake_minimum_required(VERSION 3.14)
+project(eventtransitions LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(INSTALL_EXAMPLEDIR "examples")
+
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(eventtransitions WIN32 MACOSX_BUNDLE
+    main.cpp
+)
+target_link_libraries(eventtransitions PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS eventtransitions
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
 )
diff --git a/examples/widgets/statemachine/factorial/CMakeLists.txt b/examples/widgets/statemachine/factorial/CMakeLists.txt
index e38995220e..e383225705 100644
--- a/examples/widgets/statemachine/factorial/CMakeLists.txt
+++ b/examples/widgets/statemachine/factorial/CMakeLists.txt
@@ -1,22 +1,26 @@
 # Generated from factorial.pro.
 
-#####################################################################
-## factorial Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(factorial LANGUAGES CXX)
 
-add_qt_executable(factorial
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/factorial"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/factorial"
-    SOURCES
-        main.cpp
-)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(INSTALL_EXAMPLEDIR "examples")
 
-## Scopes:
-#####################################################################
+find_package(Qt5 COMPONENTS Core)
 
-#### Keys ignored in scope 2:.:factorial.pro:WIN32:
-# CONFIG = "console"
+add_executable(factorial
+    main.cpp
+)
+target_link_libraries(factorial PUBLIC
+    Qt::Core
+)
 
-#### Keys ignored in scope 3:.:factorial.pro:APPLE_OSX:
-# CONFIG = "-app_bundle"
+install(TARGETS factorial
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)
diff --git a/examples/widgets/statemachine/pingpong/CMakeLists.txt b/examples/widgets/statemachine/pingpong/CMakeLists.txt
index b911bd727f..e3745a280d 100644
--- a/examples/widgets/statemachine/pingpong/CMakeLists.txt
+++ b/examples/widgets/statemachine/pingpong/CMakeLists.txt
@@ -1,22 +1,26 @@
 # Generated from pingpong.pro.
 
-#####################################################################
-## pingpong Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(pingpong LANGUAGES CXX)
 
-add_qt_executable(pingpong
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/pingpong"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/pingpong"
-    SOURCES
-        main.cpp
-)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(INSTALL_EXAMPLEDIR "examples")
 
-## Scopes:
-#####################################################################
+find_package(Qt5 COMPONENTS Core)
 
-#### Keys ignored in scope 2:.:pingpong.pro:WIN32:
-# CONFIG = "console"
+add_executable(pingpong
+    main.cpp
+)
+target_link_libraries(pingpong PUBLIC
+    Qt::Core
+)
 
-#### Keys ignored in scope 3:.:pingpong.pro:APPLE_OSX:
-# CONFIG = "-app_bundle"
+install(TARGETS pingpong
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)
diff --git a/examples/widgets/statemachine/rogue/CMakeLists.txt b/examples/widgets/statemachine/rogue/CMakeLists.txt
index a6a1a473e1..7ce3c5c966 100644
--- a/examples/widgets/statemachine/rogue/CMakeLists.txt
+++ b/examples/widgets/statemachine/rogue/CMakeLists.txt
@@ -1,17 +1,28 @@
 # Generated from rogue.pro.
 
-#####################################################################
-## rogue Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(rogue LANGUAGES CXX)
 
-add_qt_executable(rogue
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/rogue"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/rogue"
-    SOURCES
-        main.cpp
-        movementtransition.h
-        window.cpp window.h
-    LIBRARIES
-        Qt::Widgets
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(INSTALL_EXAMPLEDIR "examples")
+
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(rogue WIN32 MACOSX_BUNDLE
+    main.cpp
+    movementtransition.h
+    window.cpp window.h
+)
+target_link_libraries(rogue PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS rogue
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
 )
diff --git a/examples/widgets/statemachine/trafficlight/CMakeLists.txt b/examples/widgets/statemachine/trafficlight/CMakeLists.txt
index 52f9fb3c6c..3325c5fe46 100644
--- a/examples/widgets/statemachine/trafficlight/CMakeLists.txt
+++ b/examples/widgets/statemachine/trafficlight/CMakeLists.txt
@@ -1,15 +1,26 @@
 # Generated from trafficlight.pro.
 
-#####################################################################
-## trafficlight Binary:
-#####################################################################
-
-add_qt_executable(trafficlight
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/trafficlight"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/trafficlight"
-    SOURCES
-        main.cpp
-    LIBRARIES
-        Qt::Widgets
+cmake_minimum_required(VERSION 3.14)
+project(trafficlight LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(INSTALL_EXAMPLEDIR "examples")
+
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(trafficlight WIN32 MACOSX_BUNDLE
+    main.cpp
+)
+target_link_libraries(trafficlight PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS trafficlight
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
 )
diff --git a/examples/widgets/statemachine/twowaybutton/CMakeLists.txt b/examples/widgets/statemachine/twowaybutton/CMakeLists.txt
index c5f14b7514..3ea05f9595 100644
--- a/examples/widgets/statemachine/twowaybutton/CMakeLists.txt
+++ b/examples/widgets/statemachine/twowaybutton/CMakeLists.txt
@@ -1,15 +1,26 @@
 # Generated from twowaybutton.pro.
 
-#####################################################################
-## twowaybutton Binary:
-#####################################################################
-
-add_qt_executable(twowaybutton
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/twowaybutton"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/statemachine/twowaybutton"
-    SOURCES
-        main.cpp
-    LIBRARIES
-        Qt::Widgets
+cmake_minimum_required(VERSION 3.14)
+project(twowaybutton LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+
+set(INSTALL_EXAMPLEDIR "examples")
+
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(twowaybutton WIN32 MACOSX_BUNDLE
+    main.cpp
+)
+target_link_libraries(twowaybutton PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS twowaybutton
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
 )