Re: Problem with Arrays of dialogs

[Jonathon Jongsma <jonathon quotidian org>]

On Wed, 2010-09-08 at 19:44 +0100, Filipe Apostolo wrote:
> Hi to everyone,
> 
> I have a class where I want to store a list of Dialogs; This List is
> dynamical.
> so I've declared an: 
>             std::vector <Gtk::Dialog> ;
> Here I've faced my first problem
> 
> when i try to do:
> 
>     myList.push_back (temp_dialog);
>  
> the compiler output is:
> error C2248: 'Gtk::Dialog::Dialog' : cannot access private member
> declared in class 'Gtk::Dialog'

Gtk::Dialog intentionally does not have a copy constructor.  std::vector
requires elements to be copyable.  You can use a
std::vector<Gtk::Dialog*> instead.

> while compiling class template member function 'void
> std::vector<_Ty>::_Insert_n(std::_Vector_const_iterator<_Ty,_Alloc>,__w64 unsigned int,const _Ty &)'
>         with (...........)
> 
> I tried with assign, with resize and many others methods of vector
> (also tried std::list) and all do the same error.
> 
> Second problem:
> Because I couldn't use std::vector I created a array which I would
> allocate dynamically:
> 
> Declaration:      Gtk::Dialog* mPopUpDialog;
> 
> void 
> MyClass::LaunchPopUps(bool launch)
> {
>     
> 1- int numberOfPopUps = mpSystem->GetNumberOfItems();
>     
> 2-    if (launch)
> 3-    {
> 4-        if (mActualpopUpListSize != 0)
> 5-        {
> 6-            LaunchVariablePopUps(false);
> 7-        }
> 
> 8-        mActualpopUpListSize = numberOfPopUps;
> 
> 9-        mPopUpDialog = new Gtk::Dialog[numberOfPopUps];
>         
> 10-        std::map<Glib::ustring,Variable> variableMap;
> 11-       std::map<Glib::ustring,Variable>::iterator variableIT;
> 12-        variableMap = mpSystem->GetVariablesList();
>         
> 13-       int i = 0;        
> 14-        for (variableIT = variableMap.begin(); variableIT !=
> variableMap.end(); ++variableIT)
> 15-       {
> 16-            mPopUpsWindow.push_back (tempWindow);
> 17-            //mPopUpDialog[i].set_parent(*pParentWindow);
> 18-
> mPopUpDialog[i].set_title(variableIT->second.GetName());
> 19-            mPopUpDialog[i].show_now();
> 20-            ++i;
> 21-        }
>         
> 22-    }
> 23-    else
> 24-   {
> 25-        for (int i = 0; i < mActualpopUpListSize; i++)
> 26-        {
> 27-            mPopUpDialog[i].hide();         
> 28-        }
> 
> 29-        mActualpopUpListSize = 0;
> 30-        delete[] mPopUpDialog;
> 31-    }
> 
> 
> At line 9  I allocate memory for the pop up dialogs that I need; Here
> OK;
> At line 19 I call show() instead of run() to allow the main window
> interaction with the open dialogs. Here OK;
> 
> When I want to Hide the dialogs the program crashes when it reaches
> line 30. If I comment it the app runs as I want, it shows and hides
> well, however it will allocate memory without freeing it.
> 
> 
> Problem 3:
> I tried to use Gtk::manage at line 9: mPopUpDialog = Gtk::manage(new
> Gtk::Dialog[numberOfPopUps]); and comment line 30. But it does not
> solve the problem; The app does not crash but at debug console it
> appears a gtk error message that says:
>  WARNING **: gtkm: Atempt to call Gtk::manage() on a Gtk::Window, but
> a Gtk::Window has no parent container to manage its lifetime;
> 
> 
> Can anyone figure out how to crate a dynamical array of Gtk::Dialogs?

I don't understand your problem.  The warning is telling you that you
can't use Gtk::manage() on toplevel widgets (e.g. windows).  So just
remove that call (and delete the objects yourself when they're no longer
needed)

-- 
Jonathon Jongsma <jonathon quotidian org>