Make Fl_String and Fl_Int_Vector private (#789)

- add CMake option 'OPTION_USE_STD'
- add configure option '--enable-use_std'
- move FL/Fl_String.H to src/Fl_String.H
- move FL/Fl_Int_Vector.H to src/Fl_Int_Vector.H
- remove Fl_String from demo program examples/callbacks.cxx
- remove Fl_Int_Vector from public header FL/Fl_Table.H
- some methods of Fl_Table are no longer inline
- add CMake option OPTION_USE_STD to allow std::string in some
  selected functions and methods

Experimental, may be removed before release:

- use either Fl_Int_Vector or std::vector in Fl_Table depending
  on CMake OPTION_USE_STD or configure --enable-use_std

Move all fl_filename* functions that use Fl_String to fluid

Main changes in fluid:
 - add fluid_filename.h and .cxx
 - include "fluid_filename.h" rather than <FL/filename.H>

Update fl_input(), fl_password() and test/ask

- add maxchar parameter to fl_input() and fl_password()
- fl_input_str() and fl_password_str() are optional and return
  std::string if enabled (FLTK_USE_STD)

1 files changed, 23 insertions, 17 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad47d4139..3c3b8c938 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -262,56 +262,62 @@ else ()
 endif ()
 
 if (FLTK_USE_BUILTIN_JPEG)
-  message (STATUS "Image Libraries:         JPEG = Builtin")
+  message (STATUS "Image Libraries         : JPEG = Builtin")
 else ()
-  message (STATUS "Image Libraries:         JPEG = System")
+  message (STATUS "Image Libraries         : JPEG = System")
 endif ()
 
 if (FLTK_USE_BUILTIN_PNG)
-  message (STATUS "                         PNG  = Builtin")
+  message (STATUS "                        : PNG  = Builtin")
 else ()
-  message (STATUS "                         PNG  = System")
+  message (STATUS "                        : PNG  = System")
 endif ()
 
 if (FLTK_USE_BUILTIN_ZLIB)
-  message (STATUS "                         ZLIB = Builtin")
+  message (STATUS "                        : ZLIB = Builtin")
 else ()
-  message (STATUS "                         ZLIB = System")
+  message (STATUS "                        : ZLIB = System")
 endif ()
 
 if (UNIX AND NOT (APPLE AND NOT OPTION_APPLE_X11))
 
   if (OPTION_USE_WAYLAND)
-    message (STATUS "Use Wayland:             Yes (when available at run-time)")
+    message (STATUS "Use Wayland             : Yes (if available at run-time)")
   else ()
-    message (STATUS "Use Wayland:             No (therefore, X11 is used)")
+    message (STATUS "Use Wayland             : No (therefore, X11 is used)")
   endif ()
 
   if (FLTK_USE_CAIRO)
-    message (STATUS "All drawing uses Cairo:  Yes")
+    message (STATUS "All drawing uses Cairo  : Yes")
   else ()
-    message (STATUS "All drawing uses Cairo:  No")
+    message (STATUS "All drawing uses Cairo  : No")
   endif ()
 
   if (USE_PANGO)
-    message (STATUS "Use Pango:               Yes")
+    message (STATUS "Use Pango               : Yes")
   else (USE_PANGO)
-    message (STATUS "Use Pango:               No")
+    message (STATUS "Use Pango               : No")
     if (USE_XFT)
-      message (STATUS "Use Xft:                 Yes")
+      message (STATUS "Use Xft                 : Yes")
     else ()
-      message (STATUS "Use Xft:                 No")
+      message (STATUS "Use Xft                 : No")
     endif (USE_XFT)
   endif (USE_PANGO)
 
 endif (UNIX AND NOT (APPLE AND NOT OPTION_APPLE_X11))
 
 if (FLTK_HAVE_CAIROEXT)
-  message (STATUS "Fl_Cairo_Window support: Yes (extended)")
+  message (STATUS "Fl_Cairo_Window support : Yes (extended)")
 elseif (FLTK_HAVE_CAIRO)
-  message (STATUS "Fl_Cairo_Window support: Yes (standard)")
+  message (STATUS "Fl_Cairo_Window support : Yes (standard)")
 else ()
-  message (STATUS "Fl_Cairo_Window support: No")
+  message (STATUS "Fl_Cairo_Window support : No")
+endif ()
+
+if (FLTK_USE_STD)
+  message (STATUS "Use std::               : Yes")
+else ()
+  message (STATUS "Use std::               : No")
 endif ()
 
 message ("")