added ImGUI example

Author: StephanKa

conanfile.py

@@ -106,6 +106,7 @@ def requirements(self):
         if self.options.use_imgui:
             self.requires("imgui/1.90.5")
             self.requires("implot/0.16")
+            self.requires("glfw/3.4")
 
     # 4. call for conan install
     def build_requirements(self):

src/CMakeLists.txt

@@ -54,7 +54,12 @@ IF(CPP_STARTER_USE_SLINT)
     ADD_SUBDIRECTORY(slint)
 ENDIF()
 
-FIND_PACKAGE(docopt REQUIRED)
+# imgui example
+IF(CPP_STARTER_USE_IMGUI)
+    MESSAGE("Using imgui")
+    ADD_SUBDIRECTORY(imgui)
+ENDIF()
+
 FIND_PACKAGE(spdlog REQUIRED)
 FIND_PACKAGE(fmt REQUIRED)
 # Generic test that uses conan libs

src/imgui/CMakeLists.txt

@@ -0,0 +1,34 @@
+FIND_PACKAGE(ImGui REQUIRED)
+FIND_PACKAGE(ImPlot REQUIRED)
+FIND_PACKAGE(glfw3 REQUIRED)
+FIND_PACKAGE(OpenGL REQUIRED)
+
+# Retrieve the imgui package include directory.
+# Conan's CMakeDeps sets INTERFACE_INCLUDE_DIRECTORIES to a real path at configure time,
+# so GET_TARGET_PROPERTY works here without config-specific suffixes like _DEBUG/_RELEASE.
+GET_TARGET_PROPERTY(_imgui_incdirs imgui::imgui INTERFACE_INCLUDE_DIRECTORIES)
+LIST(GET _imgui_incdirs 0 IMGUI_INCLUDE_DIR)
+
+# Backend sources were copied from res/bindings -> include/backends by conanfile.py generate()
+ADD_EXECUTABLE(test_imgui
+    main.cpp
+    ${IMGUI_INCLUDE_DIR}/backends/imgui_impl_glfw.cpp
+    ${IMGUI_INCLUDE_DIR}/backends/imgui_impl_opengl3.cpp
+)
+
+TARGET_LINK_LIBRARIES(test_imgui PRIVATE
+    imgui::imgui
+    implot::implot
+    glfw
+    OpenGL::GL
+)
+
+# On Windows and Linux, copy runtime DLLs/SOs next to the binary
+IF(WIN32)
+    ADD_CUSTOM_COMMAND(TARGET test_imgui POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+            $<TARGET_RUNTIME_DLLS:test_imgui>
+            $<TARGET_FILE_DIR:test_imgui>
+        COMMAND_EXPAND_LISTS
+    )
+ENDIF()