Packing widgets in gtkmm

Yes. This code compiles successfully. I have just completed an experiment based on the tutorial from Programming with GTKmm by Murray Cumming.

Here is the code:

main.cpp

#include<gtkmm.h>
#include "MyWindow.h"


int main(int argc,char** argv)
{
    Gtk::Main kit(argc,argv);
    MyWindow window;
    Gtk::Main::run(window);
    return 0;
}

MyWindow.h

#ifndef GTKMM_TUT_CHKBUTTON_H
#define GTKMM_TUT_CHKBUTTON_H
#include<gtkmm.h>
#include<gtkmm/window.h>
class MyWindow: public Gtk::Window
{
    public:
        MyWindow();
        ~MyWindow();


    protected:
        //Signal Handlers
        //virtual void OnChkDisplayFlag_Toggled();
        virtual void OnBtnClose_Clicked();
        //virtual void OnAdjDigit();
        //virtual void OnAdjPageSize();


        Gtk::VBox m_vbxMain, m_vbxScale_Scroll;
        Gtk::HBox m_hbxVert_Horiz, m_hbxValuePos,
              m_hbxUpdatePolicy, m_hbxDigit, m_hbxPageSize;


        Gtk::CheckButton m_chkDisplayFlag;
        Gtk::Label m_lblValuePos, m_lblUpdatePolicy,
                                 m_lblDigit, m_lblPageSize;


        //ComboBox
        Gtk::ComboBox m_cbxValuePos, m_cbxUpdatePolicy;


        class ModelColumns : public Gtk::TreeModelColumnRecord
        {
            public:
                ModelColumns()
                {
                    add(m_iID); add(m_sChoice);
                }
                Gtk::TreeModelColumn<int> m_iID;
                Gtk::TreeModelColumn<Glib::ustring> m_sChoice;
        };


        ModelColumns m_MC_UpdatePolicy, m_MC_ValuePos;
        Glib::RefPtr<Gtk::ListStore> mpLS_ValuePos,
                                       mpLS_UpdatePolicy;


        Gtk::Adjustment m_adjVert, m_adjDigit, m_adjPageSize;
        Gtk::VScale m_vscVert ;
        Gtk::HScale m_hscHoriz,m_hscDigit,m_hscPageSize;
        Gtk::HScrollbar m_hsScroll;


        Gtk::HSeparator m_hspSep;
        Gtk::Button m_btnClose;


};
#endif //GTKMM_TUT_CHKBUTTON_H

MyWindow.cpp

#include"MyWindow.h"
#include<stdio.h>


MyWindow::MyWindow()
:
    m_vbxMain(false,30),
    m_vbxScale_Scroll(false,10),
    //m_vbxCloseButton(false,10),


    m_hbxVert_Horiz(false,10),
    m_hbxValuePos(false,10),
    m_hbxUpdatePolicy(false,10),
    m_hbxDigit(false,10),
    m_hbxPageSize(false,10),


    m_chkDisplayFlag("Display values in the Widgets",0),


    m_lblValuePos("Value Position"),
    m_lblUpdatePolicy("Update Policy"),
    m_lblDigit("Scale Digits"),
    m_lblPageSize("Page Size"),


    //Gtk::Adjustment::Adjustment (value,lower,upper,
                       step_increment,page_increment,page_size)
    m_adjVert(0.0 , 0.0, 101.0, 0.1, 1.0, 1.0),
    m_adjDigit(1.0, 0.0, 5.0),
    m_adjPageSize(1.0, 0.0, 101.1),


    m_hscHoriz(m_adjVert),
    m_vscVert(m_adjVert),
    m_hscDigit(m_adjDigit),
    m_hscPageSize(m_adjPageSize),


    m_hsScroll(m_adjVert),


    m_btnClose("Close")
{
    set_title("Ranging Widgets");


    //Vertical Scaler widget
    m_vscVert.set_update_policy(Gtk::UPDATE_CONTINUOUS);
    m_vscVert.set_digits(1);
    m_vscVert.set_value_pos(Gtk::POS_TOP);
    m_vscVert.set_draw_value();




    //Vertical Scaler widget
    m_hscHoriz.set_update_policy(Gtk::UPDATE_CONTINUOUS);
    m_hscHoriz.set_digits(1);
    m_hscHoriz.set_value_pos(Gtk::POS_TOP);
    m_hscHoriz.set_draw_value();
    m_hscHoriz.set_size_request(200,30);


    m_hscDigit.set_update_policy(Gtk::UPDATE_CONTINUOUS);
    m_hscDigit.set_digits(1);
    m_hscDigit.set_value_pos(Gtk::POS_TOP);
    m_hscDigit.set_draw_value();
    m_hscDigit.set_size_request(200,30);


    m_hscPageSize.set_update_policy(Gtk::UPDATE_CONTINUOUS);
    m_hscPageSize.set_digits(1);
    m_hscPageSize.set_value_pos(Gtk::POS_TOP);
    m_hscPageSize.set_draw_value();
    m_hscPageSize.set_size_request(200,30);




    //ComboBox-ValuePos
    mpLS_ValuePos = Gtk::ListStore::create(m_MC_ValuePos);
    m_cbxValuePos.set_model(mpLS_ValuePos);


    Gtk::TreeModel::Row row = *(mpLS_ValuePos->append());
    row[m_MC_ValuePos.m_iID] = 1;
    row[m_MC_ValuePos.m_sChoice] = "Top";




    row = *(mpLS_ValuePos->append());
    row[m_MC_ValuePos.m_iID] = 2;
    row[m_MC_ValuePos.m_sChoice] = "Right";


    row = *(mpLS_ValuePos->append());
    row[m_MC_ValuePos.m_iID] = 3;
    row[m_MC_ValuePos.m_sChoice] = "Bottom";




    row = *(mpLS_ValuePos->append());
    row[m_MC_ValuePos.m_iID] = 4;
    row[m_MC_ValuePos.m_sChoice] = "Left";


    m_cbxValuePos.pack_start(m_MC_ValuePos.m_iID);
    m_cbxValuePos.pack_start(m_MC_ValuePos.m_sChoice);


    //ComboBox-UpdatePolicy
    mpLS_UpdatePolicy =Gtk::ListStore::create(m_MC_UpdatePolicy);
    m_cbxUpdatePolicy.set_model(mpLS_UpdatePolicy);


    row = *(mpLS_UpdatePolicy->append());
    row[m_MC_UpdatePolicy.m_iID] = 1;
    row[m_MC_UpdatePolicy.m_sChoice] = "Continuous";


    row = *(mpLS_UpdatePolicy->append());
    row[m_MC_UpdatePolicy.m_iID] = 2;
    row[m_MC_UpdatePolicy.m_sChoice] = "Discontinuous";


    row = *(mpLS_UpdatePolicy->append());
    row[m_MC_UpdatePolicy.m_iID] = 3;
    row[m_MC_UpdatePolicy.m_sChoice] = "Delayed";


    m_cbxUpdatePolicy.pack_start(m_MC_UpdatePolicy.m_iID);
    m_cbxUpdatePolicy.pack_start(m_MC_UpdatePolicy.m_sChoice);




    m_btnClose.set_flags(Gtk::CAN_DEFAULT);
    m_btnClose.grab_default();
    m_btnClose.signal_clicked().connect(
          sigc::mem_fun(*this,&MyWindow::OnBtnClose_Clicked));


    //Packing
    add(m_vbxMain);
    m_vbxMain.pack_start(m_hbxVert_Horiz);
    m_vbxMain.pack_start(m_chkDisplayFlag);
    m_vbxMain.pack_start(m_hbxValuePos);
    m_vbxMain.pack_start(m_hbxUpdatePolicy);
    m_vbxMain.pack_start(m_hbxDigit);
    m_vbxMain.pack_start(m_hbxPageSize);
    m_vbxMain.pack_start(m_btnClose);


    m_hbxVert_Horiz.pack_start(m_vscVert);
    m_hbxVert_Horiz.pack_start(m_vbxScale_Scroll);


        m_vbxScale_Scroll.pack_start(m_hscHoriz);
        m_vbxScale_Scroll.pack_start(m_hsScroll);


    m_hbxValuePos.pack_start(m_lblValuePos);
    m_hbxValuePos.pack_start(m_cbxValuePos);


    m_hbxUpdatePolicy.pack_start(m_lblUpdatePolicy);
    m_hbxUpdatePolicy.pack_start(m_cbxUpdatePolicy);


    m_hbxDigit.pack_start(m_lblDigit);
    m_hbxDigit.pack_start(m_hscDigit);


    m_hbxPageSize.pack_start(m_lblPageSize);
    m_hbxPageSize.pack_start(m_hscPageSize);
    show_all_children();
}


MyWindow::~MyWindow()
{


}


void MyWindow::OnBtnClose_Clicked()
{
    printf("\nI'm over.. !!");
    hide();
}