Examples: CI: backtrack and make example_null embed backend: simpler for all sorts of quick build scripts.

examples/example_null/Makefile

@@ -14,11 +14,10 @@ EXE = example_null
 IMGUI_DIR = ../..
 SOURCES = main.cpp
 SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
-SOURCES += $(IMGUI_DIR)/backends/imgui_impl_null.cpp
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 
-CXXFLAGS += -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS += -std=c++11 -I$(IMGUI_DIR)
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

examples/example_null/build_win32.bat

@@ -1,3 +1,3 @@
 @REM Build for Visual Studio compiler. Run your copy of vcvars32.bat or vcvarsall.bat to setup command-line compiler.
 mkdir Debug
-cl /nologo /Zi /MD /utf-8 /I ..\.. %* *.cpp ..\..\*.cpp ..\..\backends\imgui_impl_null.cpp /FeDebug/example_null.exe /FoDebug/ /link gdi32.lib shell32.lib imm32.lib
+cl /nologo /Zi /MD /utf-8 /I ..\.. %* *.cpp ..\..\*.cpp /FeDebug/example_null.exe /FoDebug/ /link gdi32.lib shell32.lib imm32.lib

examples/example_null/example_null.vcxproj

@@ -151,7 +151,6 @@
     <ClInclude Include="..\..\imconfig.h" />
     <ClInclude Include="..\..\imgui.h" />
     <ClInclude Include="..\..\imgui_internal.h" />
-    <ClInclude Include="..\..\backends\imgui_impl_null.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\imgui.cpp" />

examples/example_null/example_null.vcxproj.filters

@@ -18,9 +18,6 @@
     <ClInclude Include="..\..\imgui_internal.h">
       <Filter>imgui</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\backends\imgui_impl_null.h">
-      <Filter>sources</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\imgui.cpp">
@@ -54,4 +51,4 @@
       <Filter>imgui</Filter>
     </None>
   </ItemGroup>
-</Project>
+</Project>

examples/example_null/main.cpp

@@ -3,7 +3,11 @@
 // This is useful to test building, but you cannot interact with anything here!
 #include "imgui.h"
 #include <stdio.h>
-#include "imgui_impl_null.h"
+
+// For imgui_impl_null: use relative filename + embed implementation directly by including the .cpp file.
+// This is to simplify casual building of this example from all sorts of test scripts.
+#include "../../backends/imgui_impl_null.h"
+#include "../../backends/imgui_impl_null.cpp"
 
 int main(int, char**)
 {