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>

1 files changed, 35 insertions, 134 deletions

diff --git a/examples/widgets/animation/sub-attaq/CMakeLists.txt b/examples/widgets/animation/sub-attaq/CMakeLists.txt
index e7cb602e19..3260a5f75d 100644
--- a/examples/widgets/animation/sub-attaq/CMakeLists.txt
+++ b/examples/widgets/animation/sub-attaq/CMakeLists.txt
@@ -1,142 +1,43 @@
 # Generated from sub-attaq.pro.
 
-#####################################################################
-## sub-attaq Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(sub-attaq LANGUAGES CXX)
 
-add_qt_executable(sub-attaq
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/animation/sub-attaq"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/animation/sub-attaq"
-    SOURCES
-        animationmanager.cpp animationmanager.h
-        boat.cpp boat.h boat_p.h
-        bomb.cpp bomb.h
-        graphicsscene.cpp graphicsscene.h
-        main.cpp
-        mainwindow.cpp mainwindow.h
-        pixmapitem.cpp pixmapitem.h
-        progressitem.cpp progressitem.h
-        qanimationstate.cpp qanimationstate.h
-        states.cpp states.h
-        submarine.cpp submarine.h submarine_p.h
-        textinformationitem.cpp textinformationitem.h
-        torpedo.cpp torpedo.h
-    LIBRARIES
-        Qt::Widgets
-)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
 
-# Resources:
-set_source_files_properties("pics/big/background.png"
-    PROPERTIES alias "big/background")
-set_source_files_properties("pics/big/boat.png"
-    PROPERTIES alias "big/boat")
-set_source_files_properties("pics/big/bomb.png"
-    PROPERTIES alias "big/bomb")
-set_source_files_properties("pics/big/explosion/boat/step1.png"
-    PROPERTIES alias "big/explosion/boat/step1")
-set_source_files_properties("pics/big/explosion/boat/step2.png"
-    PROPERTIES alias "big/explosion/boat/step2")
-set_source_files_properties("pics/big/explosion/boat/step3.png"
-    PROPERTIES alias "big/explosion/boat/step3")
-set_source_files_properties("pics/big/explosion/boat/step4.png"
-    PROPERTIES alias "big/explosion/boat/step4")
-set_source_files_properties("pics/big/explosion/submarine/step1.png"
-    PROPERTIES alias "big/explosion/submarine/step1")
-set_source_files_properties("pics/big/explosion/submarine/step2.png"
-    PROPERTIES alias "big/explosion/submarine/step2")
-set_source_files_properties("pics/big/explosion/submarine/step3.png"
-    PROPERTIES alias "big/explosion/submarine/step3")
-set_source_files_properties("pics/big/explosion/submarine/step4.png"
-    PROPERTIES alias "big/explosion/submarine/step4")
-set_source_files_properties("pics/big/submarine.png"
-    PROPERTIES alias "big/submarine")
-set_source_files_properties("pics/big/surface.png"
-    PROPERTIES alias "big/surface")
-set_source_files_properties("pics/big/torpedo.png"
-    PROPERTIES alias "big/torpedo")
-set_source_files_properties("pics/scalable/boat.svg"
-    PROPERTIES alias "boat")
-set_source_files_properties("pics/scalable/sub-attaq.svg"
-    PROPERTIES alias "all")
-set_source_files_properties("pics/scalable/submarine.svg"
-    PROPERTIES alias "submarine")
-set_source_files_properties("pics/scalable/torpedo.svg"
-    PROPERTIES alias "torpedo")
-set_source_files_properties("pics/small/background.png"
-    PROPERTIES alias "small/background")
-set_source_files_properties("pics/small/boat.png"
-    PROPERTIES alias "small/boat")
-set_source_files_properties("pics/small/bomb.png"
-    PROPERTIES alias "small/bomb")
-set_source_files_properties("pics/small/submarine.png"
-    PROPERTIES alias "small/submarine")
-set_source_files_properties("pics/small/surface.png"
-    PROPERTIES alias "small/surface")
-set_source_files_properties("pics/small/torpedo.png"
-    PROPERTIES alias "small/torpedo")
-set_source_files_properties("pics/welcome/logo-a.png"
-    PROPERTIES alias "logo-a")
-set_source_files_properties("pics/welcome/logo-a2.png"
-    PROPERTIES alias "logo-a2")
-set_source_files_properties("pics/welcome/logo-b.png"
-    PROPERTIES alias "logo-b")
-set_source_files_properties("pics/welcome/logo-dash.png"
-    PROPERTIES alias "logo-dash")
-set_source_files_properties("pics/welcome/logo-excl.png"
-    PROPERTIES alias "logo-excl")
-set_source_files_properties("pics/welcome/logo-q.png"
-    PROPERTIES alias "logo-q")
-set_source_files_properties("pics/welcome/logo-s.png"
-    PROPERTIES alias "logo-s")
-set_source_files_properties("pics/welcome/logo-t.png"
-    PROPERTIES alias "logo-t")
-set_source_files_properties("pics/welcome/logo-t2.png"
-    PROPERTIES alias "logo-t2")
-set_source_files_properties("pics/welcome/logo-u.png"
-    PROPERTIES alias "logo-u")
-add_qt_resource(sub-attaq "subattaq" PREFIX "/" FILES
-    data.xml
-    pics/big/background.png
-    pics/big/boat.png
-    pics/big/bomb.png
-    pics/big/explosion/boat/step1.png
-    pics/big/explosion/boat/step2.png
-    pics/big/explosion/boat/step3.png
-    pics/big/explosion/boat/step4.png
-    pics/big/explosion/submarine/step1.png
-    pics/big/explosion/submarine/step2.png
-    pics/big/explosion/submarine/step3.png
-    pics/big/explosion/submarine/step4.png
-    pics/big/submarine.png
-    pics/big/surface.png
-    pics/big/torpedo.png
-    pics/scalable/boat.svg
-    pics/scalable/sub-attaq.svg
-    pics/scalable/submarine.svg
-    pics/scalable/torpedo.svg
-    pics/small/background.png
-    pics/small/boat.png
-    pics/small/bomb.png
-    pics/small/submarine.png
-    pics/small/surface.png
-    pics/small/torpedo.png
-    pics/welcome/logo-a.png
-    pics/welcome/logo-a2.png
-    pics/welcome/logo-b.png
-    pics/welcome/logo-dash.png
-    pics/welcome/logo-excl.png
-    pics/welcome/logo-q.png
-    pics/welcome/logo-s.png
-    pics/welcome/logo-t.png
-    pics/welcome/logo-t2.png
-    pics/welcome/logo-u.png)
+set(INSTALL_EXAMPLEDIR "examples")
 
+find_package(Qt5 COMPONENTS Widgets)
+find_package(Qt5 COMPONENTS OpenGL) # special case
 
-## Scopes:
-#####################################################################
+add_executable(sub-attaq WIN32 MACOSX_BUNDLE
+    animationmanager.cpp animationmanager.h
+    boat.cpp boat.h boat_p.h
+    bomb.cpp bomb.h
+    graphicsscene.cpp graphicsscene.h
+    main.cpp
+    mainwindow.cpp mainwindow.h
+    pixmapitem.cpp pixmapitem.h
+    progressitem.cpp progressitem.h
+    qanimationstate.cpp qanimationstate.h
+    states.cpp states.h
+    subattaq.qrc
+    submarine.cpp submarine.h submarine_p.h
+    textinformationitem.cpp textinformationitem.h
+    torpedo.cpp torpedo.h
+)
+target_link_libraries(sub-attaq PUBLIC
+    Qt::Widgets
+)
+if (TARGET Qt::OpenGL)
+    target_link_libraries(sub-attaq PUBLIC Qt::OpenGL)
+endif()
 
-extend_target(sub-attaq CONDITION TARGET Qt::OpenGL
-    LIBRARIES
-        Qt::OpenGL
+install(TARGETS sub-attaq
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
 )