From b73dbca612aae25c40e96070983a8d96bec95fc4 Mon Sep 17 00:00:00 2001
From: Ruud Beukema <ruud@ruudbeukema.nl>
Date: Wed, 10 Apr 2024 18:42:49 +0200
Subject: [PATCH] Add example for using the SigC++ library

---
 examples/libsigcplusplus/CMakeLists.txt | 20 ++++++++++++++++++++
 examples/libsigcplusplus/main.cpp       | 18 ++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 examples/libsigcplusplus/CMakeLists.txt
 create mode 100644 examples/libsigcplusplus/main.cpp

diff --git a/examples/libsigcplusplus/CMakeLists.txt b/examples/libsigcplusplus/CMakeLists.txt
new file mode 100644
index 00000000..51fbdeca
--- /dev/null
+++ b/examples/libsigcplusplus/CMakeLists.txt
@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+
+project(CPMLibSigCppExample)
+
+# ---- Dependencies ----
+
+include(../../cmake/CPM.cmake)
+
+CPMAddPackage("gh:libsigcplusplus/libsigcplusplus#3.6.0")
+if(libsigcplusplus_ADDED)
+    set(SIGCPP_INCLUDE_DIRS ${libsigcplusplus_SOURCE_DIR} ${CPM_PACKAGE_libsigcplusplus_BINARY_DIR} )
+    set(SIGCPP_LIBRARY sigc-3.0)
+endif()
+
+# ---- Create binary ----
+
+add_executable(CPMLibSigCppExample main.cpp)
+target_include_directories(CPMLibSigCppExample PUBLIC ${SIGCPP_INCLUDE_DIRS})
+target_link_libraries(CPMLibSigCppExample ${SIGCPP_LIBRARY})
+target_compile_features(CPMLibSigCppExample PRIVATE cxx_std_17)
diff --git a/examples/libsigcplusplus/main.cpp b/examples/libsigcplusplus/main.cpp
new file mode 100644
index 00000000..caaf753b
--- /dev/null
+++ b/examples/libsigcplusplus/main.cpp
@@ -0,0 +1,18 @@
+#include <sigc++/sigc++.h>
+#include <iostream>
+
+void example_callback() {
+    std::cout << "Hello World" << std::endl;
+}
+
+sigc::signal<void(void)> signal_say_hi;
+
+int main() {
+    // Register callback
+    signal_say_hi.connect(sigc::ptr_fun(&example_callback));
+
+    // Emit signal, so that callback gets called
+    signal_say_hi.emit();
+
+    return 0;
+}