C / C++ / MFC

#include <iostream>
using std::cout;

class level3 {
public:
  level3(const std::string& name);
};

class level2 {
public:
  level2(const std::string& name);

private:
  level3 grandchild;
  level3 favourite_grandchild;
};

class top_level {
public:
  top_level(const std::string& name);

private:
  level2 child;
  level2 other_child;
};

top_level::top_level(const std::string& name)
  : other_child("other_child") //this will be called AFTER initialization of 'child'
  , child("child")         //this is called first because 'child' is declared first
{
  cout << name << " constructor\n";
}

level2::level2(const std::string& name)
  : favourite_grandchild("favourite_grandchild") //this is again called AFTER the next line
  , grandchild("grandchild")                     //this is called first
{
  cout << name << " level2 constructor\n";
}

level3::level3(const std::string& name)
{
  cout << name << " level3 constructor\n";
}

int main()
{
  top_level t("top");
}

grandchild level3 constructor
favourite_grandchild level3 constructor
child level2 constructor
grandchild level3 constructor
favourite_grandchild level3 constructor
other_child level2 constructor
top constructor

19:45:53: Debugging /mnt/A_BT_DEC10/A_APR13_APR15/A_APR9_MAR7_MAR19_CLEAN/A_BT_LIBRARY/mdi/mdi ...
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
" #ifdef CONNECT  START constructor A_BT_TAB_DIALOG::A_BT_TAB_DIALOG(QWidget *)"
" #ifdef CONNECT  END constructor A_BT_TAB_DIALOG::A_BT_TAB_DIALOG(QWidget *)"
"          #ifdef CONNECT  ZTART CONSTRUCTOR SettingsDialog::SettingsDialog(QWidget *) @ line # 88"
"       #ifdef CONNECT  END CONSTRUCTOR SettingsDialog::SettingsDialog(QWidget *) @ line # 229"
" #ifdef CONNECT  START constructor A_BT_TAB_DIALOG::A_BT_TAB_DIALOG(QWidget *)"
" #ifdef CONNECT  END constructor A_BT_TAB_DIALOG::A_BT_TAB_DIALOG(QWidget *)"
"          #ifdef CONNECT  ZTART CONSTRUCTOR SettingsDialog::SettingsDialog(QWidget *) @ line # 88"
"       #ifdef CONNECT  END CONSTRUCTOR SettingsDialog::SettingsDialog(QWidget *) @ line # 229"

MainWindow_Bluetooth::MainWindow_Bluetooth(QWidget *parent) :
       QMainWindow(parent),
       m_ui(new Ui::MainWindow_Bluetooth),
       m_status(new QLabel),
       m_console(new Console),
       // insert MDI area here ??
       m_mdiarea(new QMdiArea),

       m_settings(new SettingsDialog),
       //! [1]
       //! add rfcomm ??
       m_serial(new QSerialPort(this))
      // sequence 1st add HERE
      // must bbe passed to SettingsDialog
       // this is wrong parameter here ??
       //m_TAB_Connect(new A_BT_TAB_DIALOG),
       //m_TAB_Ext(new A_BT_TAB_DIALOG_EXT)


     //! [1]
   { // function apply \

SettingsDialog::SettingsDialog(QWidget *parent) :
    QDialog(parent),
    m_ui(new Ui::SettingsDialog),
    m_status(new QLabel),
    // 3 sequence  add dialogs
    // HERE wrong  object
    m_TAB_Connect(new A_BT_TAB_DIALOG),
    // wrong  object
    m_TAB_Ext(new A_BT_TAB_DIALOG_EXT),
    m_intValidator(new QIntValidator(0, 4000000, this))
{

Salvatore Terress wrote:

Can I modify my code to have TWO instances of A_BT_TAB_DIALOG
and make sure I point to the CORRECT instance ?

SettingsDialog::SettingsDialog(QWidget *parent) :
    //
    // ... stuff
    //
    m_TAB_Connect(new A_BT_TAB_DIALOG), // creates a A_BT_TAB_DIALOG
    m_TAB_Ext(new A_BT_TAB_DIALOG_EXT), // creates a A_BT_TAB_DIALOG_EXT
    // ...
{

SettingsDialog obj1(parent);
SettingsDialog obj2(parent);

class Thing1 {
public:
  Thing1 ();
}

class Composite {
public:
  Composite ();
private:
  Thing1* part;
};

Composite::Composite()
  : part (new Thing1)
{
}

class Thing2 {
public:
  Thing2 (int param=42);
};

class Composite {
public:
  Composite ();
private:
  Thing1* part;
  Thing2* other_part;
};

Composite::Composite ()
  : part (new Thing1) //as before
  , other_part (new Thing2) //same as saying other_part(new Thing2(42))
{}

Composite::Composite ()
  : part (new Thing1) //as before
  , other_part (new Thing2(24) //explicit constructor parameter
{}

class Composite{
public:
  Composite ();
private:
  Thing1 *part;
  Thing1 *other_part;
{}

Salvatore Terress wrote:

I need to digest the "pointer to the object ".

Salvatore Terress wrote:

My program just broke big time , so I am busy trying find where...
I have backup , but not up - to date..

SettingsDialog::SettingsDialog(QWidget *parent) :
    QDialog(parent),
    m_ui(new Ui::SettingsDialog),
    m_status(new QLabel),
 
    m_TAB_Connect(new A_BT_TAB_DIALOG),
    
    //m_TAB_Ext(new A_BT_TAB_DIALOG_EXT),
    m_intValidator(new QIntValidator(0, 4000000, this))
{

QDialog(parent),

m_ui(new Ui::SettingsDialog),

m_status(new QLabel),

m_TAB_Connect(new A_BT_TAB_DIALOG),

m_intValidator(new QIntValidator(0, 4000000, this))

Salvatore Terress wrote:

where to find decent description of the
this syntax
m_status(new QLabel),

_ostream.imbue(std::locale::classic());

m_serial(new QSerialPort(this),
  // sequence 1` st add HERE
   m_TAB_Ext(new A_BT_TAB_DIALOG_EXT)

m_TAB_Ext(new A_BT_TAB_DIALOG_EXT())

A_BT_TAB_DIALOG_EXT *m_TAB_Ext;