[gparted] Use Gtk::Box for Dialog_Partition_Info (!25)

[Mike Fleetwood <mfleetwo src gnome org>]

commit 363868bf5c5cbc1db4194b82b2d467cbeddafe89
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Wed Feb 27 16:26:58 2019 +0100

    Use Gtk::Box for Dialog_Partition_Info (!25)
    
    Gtk::HBox and Gtk::VBox were deprecated in Gtkmm 3.2.  Replace with
    plain Gtk::Box.
    
    This commit makes the change for Dialog_Partition_Info.{h,cc}.
    
    Closes !25 - Modern Gtk3 - part 1

 include/Dialog_Partition_Info.h |  4 ++--
 src/Dialog_Partition_Info.cc    | 11 ++++++-----
 2 files changed, 8 insertions(+), 7 deletions(-)
---
diff --git a/include/Dialog_Partition_Info.h b/include/Dialog_Partition_Info.h
index 7be93e2a..eabc6a63 100644
--- a/include/Dialog_Partition_Info.h
+++ b/include/Dialog_Partition_Info.h
@@ -50,10 +50,10 @@ private:
 
        const Partition & partition;  // (Alias to element in Win_GParted::display_partitions[] vector).
 
-       Gtk::HBox *hbox ;
+       Gtk::Box *hbox;
        Gtk::DrawingArea drawingarea ;
        Gtk::Frame *frame ;
-       Gtk::VBox info_msg_vbox ;
+       Gtk::Box info_msg_vbox;
        Gtk::ScrolledWindow info_scrolled ;
 
        Glib::RefPtr<Pango::Layout> pango_layout;
diff --git a/src/Dialog_Partition_Info.cc b/src/Dialog_Partition_Info.cc
index 80cc7255..21c494f7 100644
--- a/src/Dialog_Partition_Info.cc
+++ b/src/Dialog_Partition_Info.cc
@@ -47,11 +47,12 @@ Dialog_Partition_Info::Dialog_Partition_Info( const Partition & partition ) : pa
 
        init_drawingarea() ;
 
-       //place info and optional messages in scrollable window
+       // Place info and optional messages in scrollable window
+       info_msg_vbox.set_orientation(Gtk::ORIENTATION_VERTICAL);
        info_msg_vbox .set_border_width( 6 ) ;
        info_scrolled .set_policy( Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC ) ;
        info_scrolled .add( info_msg_vbox ) ;
-       //As Gtk::VBox widget info_msg_vbox doesn't have a native scrolling capability a
+       //  As Gtk::Box widget info_msg_vbox doesn't have a native scrolling capability a
        //  Gtk::Viewport is automatically created to contain it when it is added to the
        //  Gtk::ScrolledWindow widget info_scrolled.  The Viewport widget is created with
        //  shadow type GTK_SHADOW_IN by default.  Change to GTK_SHADOW_NONE.
@@ -74,7 +75,7 @@ Dialog_Partition_Info::Dialog_Partition_Info( const Partition & partition ) : pa
                {
                        Gtk::Image* image = Utils::mk_image(Gtk::Stock::DIALOG_WARNING, 
Gtk::ICON_SIZE_BUTTON);
 
-                       hbox = manage(new Gtk::HBox());
+                       hbox = manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
                        hbox->pack_start(*image, Gtk::PACK_SHRINK);
                }
 
@@ -105,7 +106,7 @@ Dialog_Partition_Info::Dialog_Partition_Info( const Partition & partition ) : pa
                                concatenated_messages += "<i>" + messages[i].substr( 0, take ) + "</i>";
                        }
                }
-               Gtk::VBox *vbox( manage( new Gtk::VBox() ) ) ;
+               Gtk::Box *vbox = manage(new Gtk::Box(Gtk::ORIENTATION_VERTICAL));
                vbox ->set_border_width( 5 ) ;
                vbox->pack_start( *Utils::mk_label( concatenated_messages, true, true, true ), 
Gtk::PACK_SHRINK );
                frame ->add( *vbox ) ;
@@ -169,7 +170,7 @@ void Dialog_Partition_Info::init_drawingarea()
        
        frame ->set_shadow_type( Gtk::SHADOW_ETCHED_OUT ) ;
        frame ->set_border_width( 10 ) ;
-       hbox = manage( new Gtk::HBox() ) ;
+       hbox = manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL));
        hbox ->pack_start( *frame, Gtk::PACK_EXPAND_PADDING ) ;
        
        this ->get_vbox() ->pack_start( *hbox, Gtk::PACK_SHRINK ) ;