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>

5 files changed, 118 insertions, 84 deletions

diff --git a/examples/widgets/draganddrop/draggableicons/CMakeLists.txt b/examples/widgets/draganddrop/draggableicons/CMakeLists.txt
index 62a7be0cef..ced583e1db 100644
--- a/examples/widgets/draganddrop/draggableicons/CMakeLists.txt
+++ b/examples/widgets/draganddrop/draggableicons/CMakeLists.txt
@@ -1,23 +1,28 @@
 # Generated from draggableicons.pro.
 
-#####################################################################
-## draggableicons Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(draggableicons LANGUAGES CXX)
 
-add_qt_executable(draggableicons
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/draggableicons"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/draggableicons"
-    SOURCES
-        dragwidget.cpp dragwidget.h
-        main.cpp
-    LIBRARIES
-        Qt::Widgets
-)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
 
-# Resources:
-add_qt_resource(draggableicons "draggableicons" FILES
-    images/boat.png
-    images/car.png
-    images/house.png)
+set(INSTALL_EXAMPLEDIR "examples")
 
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(draggableicons WIN32 MACOSX_BUNDLE
+    draggableicons.qrc
+    dragwidget.cpp dragwidget.h
+    main.cpp
+)
+target_link_libraries(draggableicons PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS draggableicons
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)
diff --git a/examples/widgets/draganddrop/draggabletext/CMakeLists.txt b/examples/widgets/draganddrop/draggabletext/CMakeLists.txt
index 96ec5feff6..aa6656ed0b 100644
--- a/examples/widgets/draganddrop/draggabletext/CMakeLists.txt
+++ b/examples/widgets/draganddrop/draggabletext/CMakeLists.txt
@@ -1,21 +1,28 @@
 # Generated from draggabletext.pro.
 
-#####################################################################
-## draggabletext Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(draggabletext LANGUAGES CXX)
 
-add_qt_executable(draggabletext
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/draggabletext"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/draggabletext"
-    SOURCES
-        dragwidget.cpp dragwidget.h
-        main.cpp
-    LIBRARIES
-        Qt::Widgets
-)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
 
-# Resources:
-add_qt_resource(draggabletext "draggabletext" PREFIX "/dictionary" FILES
-    words.txt)
+set(INSTALL_EXAMPLEDIR "examples")
 
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(draggabletext WIN32 MACOSX_BUNDLE
+    draggabletext.qrc
+    dragwidget.cpp dragwidget.h
+    main.cpp
+)
+target_link_libraries(draggabletext PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS draggabletext
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)
diff --git a/examples/widgets/draganddrop/dropsite/CMakeLists.txt b/examples/widgets/draganddrop/dropsite/CMakeLists.txt
index 0d54133750..abb850c0b6 100644
--- a/examples/widgets/draganddrop/dropsite/CMakeLists.txt
+++ b/examples/widgets/draganddrop/dropsite/CMakeLists.txt
@@ -1,17 +1,28 @@
 # Generated from dropsite.pro.
 
-#####################################################################
-## dropsite Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(dropsite LANGUAGES CXX)
 
-add_qt_executable(dropsite
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/dropsite"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/dropsite"
-    SOURCES
-        droparea.cpp droparea.h
-        dropsitewindow.cpp dropsitewindow.h
-        main.cpp
-    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(dropsite WIN32 MACOSX_BUNDLE
+    droparea.cpp droparea.h
+    dropsitewindow.cpp dropsitewindow.h
+    main.cpp
+)
+target_link_libraries(dropsite PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS dropsite
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
 )
diff --git a/examples/widgets/draganddrop/fridgemagnets/CMakeLists.txt b/examples/widgets/draganddrop/fridgemagnets/CMakeLists.txt
index fcd7f3da15..e0ab3d36c5 100644
--- a/examples/widgets/draganddrop/fridgemagnets/CMakeLists.txt
+++ b/examples/widgets/draganddrop/fridgemagnets/CMakeLists.txt
@@ -1,22 +1,29 @@
 # Generated from fridgemagnets.pro.
 
-#####################################################################
-## fridgemagnets Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(fridgemagnets LANGUAGES CXX)
 
-add_qt_executable(fridgemagnets
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/fridgemagnets"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/fridgemagnets"
-    SOURCES
-        draglabel.cpp draglabel.h
-        dragwidget.cpp dragwidget.h
-        main.cpp
-    LIBRARIES
-        Qt::Widgets
-)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
 
-# Resources:
-add_qt_resource(fridgemagnets "fridgemagnets" PREFIX "/dictionary" FILES
-    words.txt)
+set(INSTALL_EXAMPLEDIR "examples")
 
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(fridgemagnets WIN32 MACOSX_BUNDLE
+    draglabel.cpp draglabel.h
+    dragwidget.cpp dragwidget.h
+    fridgemagnets.qrc
+    main.cpp
+)
+target_link_libraries(fridgemagnets PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS fridgemagnets
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)
diff --git a/examples/widgets/draganddrop/puzzle/CMakeLists.txt b/examples/widgets/draganddrop/puzzle/CMakeLists.txt
index 2622dd068e..b95d7b2cf4 100644
--- a/examples/widgets/draganddrop/puzzle/CMakeLists.txt
+++ b/examples/widgets/draganddrop/puzzle/CMakeLists.txt
@@ -1,26 +1,30 @@
 # Generated from puzzle.pro.
 
-#####################################################################
-## puzzle Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(puzzle LANGUAGES CXX)
 
-add_qt_executable(puzzle
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/puzzle"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/draganddrop/puzzle"
-    SOURCES
-        main.cpp
-        mainwindow.cpp mainwindow.h
-        pieceslist.cpp pieceslist.h
-        puzzlewidget.cpp puzzlewidget.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")
 
-# Resources:
-add_qt_resource(puzzle "puzzle" PREFIX "/images" FILES
-    example.jpg)
+find_package(Qt5 COMPONENTS Widgets)
 
+add_executable(draganddrop_puzzle WIN32 MACOSX_BUNDLE # special case: renamed puzzle
+    main.cpp
+    mainwindow.cpp mainwindow.h
+    pieceslist.cpp pieceslist.h
+    puzzle.qrc
+    puzzlewidget.cpp puzzlewidget.h
+)
+target_link_libraries(draganddrop_puzzle PUBLIC # special case: renamed puzzle
+    Qt::Widgets
+)
 
-#### Keys ignored in scope 1:.:puzzle.pro:<NONE>:
-# QMAKE_PROJECT_NAME = "dndpuzzle"
+install(TARGETS draganddrop_puzzle # special case: renamed puzzle
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)