[gparted] Increase minimum required gtkmm to 2.16.0 (#794253)

[Curtis Gedak <gedakc src gnome org>]

commit fc215d0c2e07539374622de4dfc0bffff3bf44de
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Wed Mar 7 22:25:56 2018 +0000

    Increase minimum required gtkmm to 2.16.0 (#794253)
    
    Increase the minimum required version of gtkmm to 2.16.0, thus allowing
    removal of HAVE_GTK_SHOW_URI autoconf definition and associated fallback
    code.
    
    Bug 794253 - Desupport RHEL / CentOS 5 and raise minimum required
                 versions to glibmm 2.14.0 and gtkmm 2.16.0

 configure.ac              |   13 +------------
 src/Dialog_Rescue_Data.cc |    5 -----
 src/Win_GParted.cc        |    7 +------
 3 files changed, 2 insertions(+), 23 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 740476e..462ec89 100644
--- a/configure.ac
+++ b/configure.ac
@@ -219,7 +219,7 @@ AC_SUBST([GTHREAD_LIBS])
 AC_SUBST([GTHREAD_CFLAGS])
 
 dnl GTKMM
-PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.11.1])
+PKG_CHECK_MODULES([GTKMM], [gtkmm-2.4 >= 2.16.0])
 AC_SUBST([GTKMM_LIBS])
 AC_SUBST([GTKMM_CFLAGS])
 
@@ -228,17 +228,6 @@ dnl Check for glibmm minimum required version.
 PKG_CHECK_MODULES([GLIBMM], [glibmm-2.4 >= 2.14.0])
 
 
-dnl GTKMM 2.16 needed for gtk_show_uri()
-AC_MSG_CHECKING([for gtk_show_uri function])
-PKG_CHECK_EXISTS(
-       [gtkmm-2.4 >= 2.16.0],
-       [AC_DEFINE([HAVE_GTK_SHOW_URI], 1, [Define to 1 if gtkmm provides gtk_show_uri() function.])
-        AC_MSG_RESULT([yes])
-       ],
-       [AC_MSG_RESULT([no])]
-)
-
-
 dnl Check for gtkmm >= 2.22 to determine availability of Gtk::MessageDialog::get_message_area().
 AC_MSG_CHECKING([for Gtk::MessageDialog::get_message_area() method])
 PKG_CHECK_EXISTS(
diff --git a/src/Dialog_Rescue_Data.cc b/src/Dialog_Rescue_Data.cc
index 5d99d81..5041034 100644
--- a/src/Dialog_Rescue_Data.cc
+++ b/src/Dialog_Rescue_Data.cc
@@ -217,12 +217,7 @@ void Dialog_Rescue_Data::open_ro_view(Glib::ustring mountPoint)
 
        gscreen = gdk_screen_get_default() ;
 
-#ifdef HAVE_GTK_SHOW_URI
        gtk_show_uri( gscreen, uri .c_str(), gtk_get_current_event_time(), &error ) ;
-#else
-       Glib::ustring command = "gnome-open " + uri ;
-       gdk_spawn_command_line_on_screen( gscreen, command .c_str(), &error ) ;
-#endif
 
        if ( error != NULL )
        {
diff --git a/src/Win_GParted.cc b/src/Win_GParted.cc
index e3ecd69..25247bf 100644
--- a/src/Win_GParted.cc
+++ b/src/Win_GParted.cc
@@ -1611,16 +1611,11 @@ void Win_GParted::show_help_dialog( const Glib::ustring & filename /* E.g., gpar
 
        gscreen = gdk_screen_get_default() ;
 
-#ifdef HAVE_GTK_SHOW_URI
        gtk_show_uri( gscreen, uri .c_str(), gtk_get_current_event_time(), &error ) ;
-#else
-       Glib::ustring command = "gnome-open " + uri ;
-       gdk_spawn_command_line_on_screen( gscreen, command .c_str(), &error ) ;
-#endif
        if ( error != NULL )
        {
                //Try opening yelp application directly
-               g_clear_error( &error ) ;  //Clear error from trying to open gparted help manual above 
(gtk_show_uri or gnome-open).
+               g_clear_error( &error );  // Clear error from trying to open gparted help manual above 
(gtk_show_uri).
                Glib::ustring command = "yelp " + uri ;
                gdk_spawn_command_line_on_screen( gscreen, command .c_str(), &error ) ;
        }