Support building the (not very useful) examples

CMakeLists.txt

@@ -22,7 +22,7 @@ project( libyui-qt-graph )
 #
 #   cmake -DBUILD_DOC=on -DBUILD_EXAMPLES=off ..
 
-option( BUILD_SRC         "Build in src/ subdirectory"                on )
+option( BUILD_SRC         "Build in src/ subdirectory"                on  )
 option( BUILD_EXAMPLES    "Build C++ -based libyui examples"          off )
 option( BUILD_DOC         "Build class documentation"                 off )
 option( WERROR            "Treat all compiler warnings as errors"     on  )

examples/CMakeLists.txt

@@ -1 +1,50 @@
-PROCESS_EXAMPLES()
+# CMakeLists.txt for libyui-qt-graph/examples
+
+include( ../VERSION.cmake )
+include( FindPkgConfig )        # pkg_check_modules()
+
+set( PKG_NAME                   libyui-qt-graph${SONAME_MAJOR} )
+set( EXAMPLES_INSTALL_DIR       ${DESTDIR}/usr/share/doc/packages/${PKG_NAME}/examples )
+
+set( USE_FRESHLY_BUILT_LIBYUI   off )
+
+if ( USE_FRESHLY_BUILT_LIBYUI )
+  # Use the freshly built libyui from ../build/src, not the system libyui from
+  # /usr/lib64; also set rpath.
+  #
+  # FIXME: This will still load the UI plug-ins from the system, not the
+  # freshly built ones.
+  set( LIBYUI ${CMAKE_BINARY_DIR}/src/libyui.so )
+else()
+  # Link against the system libyui in /usr/lib64. No rpath.
+  set( LIBYUI yui )
+endif()
+
+# Check for the libgvc (from the libgraphviz package) via pkg-config;
+# this sets LIBGVC_LIBRARIES (and more).
+pkg_check_modules( LIBGVC REQUIRED libgvc )
+
+
+# Build a simple example named EXAMPLE from one source file EXAMPLE.cc
+# and install the source to the package's doc directory
+#
+function( add_example EXAMPLE )
+  add_executable( ${EXAMPLE} ${EXAMPLE}.cc )
+  target_link_libraries( ${EXAMPLE} ${LIBYUI} ${LIBGVC_LIBRARIES} )
+
+  # Add a dependency to the libyui-qt-graph CMake target so ../src/ is built first
+  add_dependencies( ${EXAMPLE} libyui-qt-graph )
+
+  if ( USE_FRESHLY_BUILT_LIBYUI )
+    # Enable including headers like <yui/YFoo.h> from ../../libyui/include
+    # which has a symlink yui -> ../src
+    target_include_directories( ${EXAMPLE} BEFORE PUBLIC ../../libyui/include )
+  endif()
+
+  install( FILES ${EXAMPLE}.cc DESTINATION ${EXAMPLES_INSTALL_DIR} )
+endfunction()
+
+#----------------------------------------------------------------------
+
+add_example( SimpleCreate )
+add_example( SimpleLoad   )

src/CMakeLists.txt

@@ -8,7 +8,8 @@ include( FindPkgConfig )        # pkg_check_modules()
 find_package( Qt5 COMPONENTS Widgets Svg X11Extras REQUIRED )
 set( CMAKE_AUTOMOC on ) # Automatically handle "moc" preprocessor (Q_OBJECTs)
 
-# Check for the libgvc (from the libgraphviz package) via pkg-config
+# Check for the libgvc (from the libgraphviz package) via pkg-config;
+# this sets LIBGVC_LIBRARIES (and more).
 pkg_check_modules( LIBGVC REQUIRED libgvc )
 message( "--   Graphviz libs: ${LIBGVC_LIBRARIES}" )