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>

2 files changed, 45 insertions, 41 deletions

diff --git a/examples/widgets/effects/blurpicker/CMakeLists.txt b/examples/widgets/effects/blurpicker/CMakeLists.txt
index f534c47102..c99beb310f 100644
--- a/examples/widgets/effects/blurpicker/CMakeLists.txt
+++ b/examples/widgets/effects/blurpicker/CMakeLists.txt
@@ -1,30 +1,28 @@
 # Generated from blurpicker.pro.
 
-#####################################################################
-## blurpicker Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(blurpicker LANGUAGES CXX)
 
-add_qt_executable(blurpicker
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/effects/blurpicker"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/effects/blurpicker"
-    SOURCES
-        blureffect.cpp blureffect.h
-        blurpicker.cpp blurpicker.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(blurpicker "blurpicker" PREFIX "/" FILES
-    images/accessories-calculator.png
-    images/accessories-text-editor.png
-    images/background.jpg
-    images/help-browser.png
-    images/internet-group-chat.png
-    images/internet-mail.png
-    images/internet-web-browser.png
-    images/office-calendar.png
-    images/system-users.png)
+set(INSTALL_EXAMPLEDIR "examples")
 
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(blurpicker WIN32 MACOSX_BUNDLE
+    blureffect.cpp blureffect.h
+    blurpicker.cpp blurpicker.h blurpicker.qrc
+    main.cpp
+)
+target_link_libraries(blurpicker PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS blurpicker
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)
diff --git a/examples/widgets/effects/fademessage/CMakeLists.txt b/examples/widgets/effects/fademessage/CMakeLists.txt
index 838a10022e..689b0593ea 100644
--- a/examples/widgets/effects/fademessage/CMakeLists.txt
+++ b/examples/widgets/effects/fademessage/CMakeLists.txt
@@ -1,21 +1,27 @@
 # Generated from fademessage.pro.
 
-#####################################################################
-## fademessage Binary:
-#####################################################################
+cmake_minimum_required(VERSION 3.14)
+project(fademessage LANGUAGES CXX)
 
-add_qt_executable(fademessage
-    GUI
-    OUTPUT_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/effects/fademessage"
-    INSTALL_DIRECTORY "${INSTALL_EXAMPLESDIR}/widgets/effects/fademessage"
-    SOURCES
-        fademessage.cpp fademessage.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(fademessage "fademessage" PREFIX "/" FILES
-    background.jpg)
+set(INSTALL_EXAMPLEDIR "examples")
 
+find_package(Qt5 COMPONENTS Widgets)
+
+add_executable(fademessage WIN32 MACOSX_BUNDLE
+    fademessage.cpp fademessage.h fademessage.qrc
+    main.cpp
+)
+target_link_libraries(fademessage PUBLIC
+    Qt::Widgets
+)
+
+install(TARGETS fademessage
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+)