Thank you for your answer. You are right, my problem is coming from
container who doesn't virtually inherit from Widget. I decided that
Database and MYSQL will both virtually inherit from Gtk::Box.
Regards
Quentin
Le 18/12/2015 18:38, Kjell Ahlstedt a écrit :
Gtk::HBox is deprecated. You should use Gtk::Box instead.
I'm not quite sure, but I think the problem is that that
GUI::MYSQL::Database inherits from Gtk::Widget via two paths, and only
in one path is Gtk::Widget a virtual base class. GUI::Database
inherits virtually, but Gtk::HBox does not. More specifically:
namespace Gtk {
class Container : public Widget // not virtual
class Box : public Container
class HBox : public Box
}
Kjell
Den 2015-12-18 kl. 12:48, skrev Quentin Huot-Marchand:
Hello,
I am Quentin and I work on a project who should be modular. For that
I designed a simple way to add more "database".
Here a uml graphic of what I try to do:
____________
| Gtk::Widget|
|----------------|
|____________|
/\ /\
/__\ /__\
___________________| |
| |
_________ | _______|___
| Window| 1 | 0..* | Database |
|----------- | --------------------------------- |---------------|
|_________| | |___________|
| /\
| /__\
______|_____ |
| Gtk::HBox | _________|__________
|----------------| | MYSQL::Database |
|____________| |-------------------------|
/\ |___________________|
/__\ |
|_______________________|
My goal is to easily add different Database UI
I tried to use resources from
http://www.cprogramming.com/tutorial/virtual_inheritance.html and
from http://www.cprogramming.com/tutorial/virtual_inheritance.html
So in C++ I've got this
MYSQL::Database
namespace GUI {
namespace MYSQL {
class Database : public virtual Gtk::HBox, public GUI::Database {
public:
Database(std::string name);
virtual void save() ;
virtual Gtk::Widget & getToolbar() ;
virtual void destroy_notify_() {
GUI::Database::destroy_notify_(); }
virtual void set_manage() { Gtk::HBox::set_manage(); }
private:
Gtk::Toolbar mToolbar ;
Gtk::Label mLabel ;
};
}
}
With
MYSQL::Database::Database(std::string name) : Widget(), HBox(),
GUI::Database(name),
mToolbar(), mLabel("hello") {
this->pack_start(mLabel) ;
this->show_all_children();
}
Database:
namespace GUI {
class Database : public virtual Gtk::Widget {
public:
Database(std::string name);
std::string getName() const { return mName ; }
virtual void save() = 0 ;
virtual Gtk::Widget & getToolbar() = 0;
virtual void destroy_notify_() { }
Database(Database const&) = delete;
void operator=(Database const&) = delete;
private:
std::string mName ;
};
}
with
Database::Database(std::string name) : Widget(), mName(name) {
}
And I've this compilation error:
In file included from
/home/spartan-117/Documents/NSS/DBConceptor/GUI/src/main_window.cpp:5:0:
/home/spartan-117/Documents/NSS/DBConceptor/GUI/include/mysql/database.h:12:7:
warning: virtual base 'Gtk::Widget' inaccessible in
'NSS::DBConceptor::GUI::MYSQL::Database' due to ambiguity [-Wextra]
class Database : public virtual Gtk::HBox, public GUI::Database {
^
/home/spartan-117/Documents/NSS/DBConceptor/GUI/src/main_window.cpp:
In member function 'void
NSS::DBConceptor::GUI::MainWindow::newDatabase()':
/home/spartan-117/Documents/NSS/DBConceptor/GUI/src/main_window.cpp:73:33:
error: 'Gtk::Widget' is an ambiguous base of
'NSS::DBConceptor::GUI::MYSQL::Database'
this->mMainBox.pack_start(*dab);
If you could help me I'll be really happy.
Regards, Quentin Huot-Marchand
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