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

[Mike Fleetwood <mfleetwo src gnome org>]

commit bfeb123462ea148a64119c1c7593ed1bc607dcb1
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Wed Feb 27 16:22:07 2019 +0100

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

 include/Dialog_Base_Partition.h |  9 +++++----
 src/Dialog_Base_Partition.cc    | 16 ++++++++++------
 2 files changed, 15 insertions(+), 10 deletions(-)
---
diff --git a/include/Dialog_Base_Partition.h b/include/Dialog_Base_Partition.h
index 8374cf1f..0d1fa486 100644
--- a/include/Dialog_Base_Partition.h
+++ b/include/Dialog_Base_Partition.h
@@ -69,7 +69,7 @@ protected:
        Sector START; //the first sector of the first relevant partition ( this is either current or current 
-1 )  needed in Get_Resized_Partition()
        Sector total_length ; //total amount of sectors ( this can be up to 3 partitions...)
 
-       Gtk::HBox hbox_main ;
+       Gtk::Box hbox_main;
        Gtk::SpinButton spinbutton_before, spinbutton_size, spinbutton_after;
        OptionComboBox combo_alignment;
 
@@ -98,11 +98,12 @@ private:
        Dialog_Base_Partition & operator=( const Dialog_Base_Partition & rhs );  // Not implemented copy 
assignment operator
 
        void Check_Change( ) ;
-       
-       Gtk::VBox vbox_resize_move;
+
+       Gtk::Box vbox_resize_move;
        Gtk::Label label_minmax ;
        Gtk::Table table_resize;
-       Gtk::HBox hbox_table, hbox_resizer;
+       Gtk::Box hbox_table;
+       Gtk::Box hbox_resizer;
        Gtk::Button button_resize_move ;
 };
 
diff --git a/src/Dialog_Base_Partition.cc b/src/Dialog_Base_Partition.cc
index 27c5c880..f20586b1 100644
--- a/src/Dialog_Base_Partition.cc
+++ b/src/Dialog_Base_Partition.cc
@@ -31,22 +31,26 @@ Dialog_Base_Partition::Dialog_Base_Partition()
        this ->set_resizable( false );
        ORIG_BEFORE = ORIG_SIZE = ORIG_AFTER = -1 ;
        MIN_SPACE_BEFORE_MB = -1 ;
-       
-       //pack resizer hbox
+
+       // Pack resizer hbox
+       hbox_resizer.set_orientation(Gtk::ORIENTATION_HORIZONTAL);
        this ->get_vbox() ->pack_start( hbox_resizer, Gtk::PACK_SHRINK );
        
        //add label_minmax
        this ->get_vbox() ->pack_start( label_minmax, Gtk::PACK_SHRINK );
-       
-       //pack hbox_main
+
+       // Pack hbox_main
+       hbox_main.set_orientation(Gtk::ORIENTATION_HORIZONTAL);
        this ->get_vbox() ->pack_start( hbox_main, Gtk::PACK_SHRINK );
 
-       //put the vbox with resizer stuff (cool widget and spinbuttons) in the hbox_main
+       // Put the vbox with resizer stuff (cool widget and spinbuttons) in the hbox_main
+       vbox_resize_move.set_orientation(Gtk::ORIENTATION_VERTICAL);
        hbox_main .pack_start( vbox_resize_move, Gtk::PACK_EXPAND_PADDING );
        
        //fill table
        table_resize .set_border_width( 5 ) ;
        table_resize .set_row_spacings( 5 ) ;
+       hbox_table.set_orientation(Gtk::ORIENTATION_HORIZONTAL);
        hbox_table.pack_start( table_resize, Gtk::PACK_EXPAND_PADDING ) ;
        
        hbox_table .set_border_width( 5 ) ;
@@ -251,7 +255,7 @@ void Dialog_Base_Partition::Set_Confirm_Button( CONFIRMBUTTON button_type )
                case RESIZE_MOVE:
                        {
                                Gtk::Image* image_temp = Utils::mk_image(Gtk::Stock::GOTO_LAST, 
Gtk::ICON_SIZE_BUTTON);
-                               Gtk::HBox* hbox_resize_move(manage(new Gtk::HBox()));
+                               Gtk::Box* hbox_resize_move(manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL)));
 
                                hbox_resize_move->pack_start(*image_temp, Gtk::PACK_EXPAND_PADDING);
                                hbox_resize_move->pack_start(*Utils::mk_label(fixed_start ? _("Resize") : 
_("Resize/Move")),