On Tuesday 13 August 2002 4:24 pm, Lars Gullik Bjønnes wrote:
> | Connect these boost::functions to the appropriate methods hidden deep
> | within frontends. Eg
> | showAboutLyX=boost::bind(&ControlAboutLyX::show, this);
> | (I'd like to do this in the Dialogs c-tor, but we'll see...)
>
> and where do you setup the Dialog constructor?
Various options are available to us:
1. In the various frontends' Dialogs.C c-tor as before. Have a publiclly
acessible
boost:function0<void> show_aboutlyx;
that is connected in the c-tor.
2. Lazy construction. Don't use boost::function.
Dialogs.h
========
class DialogBase;
class Dialogs {
void showAboutLyX()
private:
/// Each Dialog will have it's own pointer.
boost::scoped_ptr<DialogBase> showaboutlyx_;
};
Dialogs.C
========
void Dialogs::showAboutLyX()
{
typedef GUI<ControlAboutlyx, FormAboutlyx, OkCancelPolicy, xformsBC> Dialog;
if (!showaboutlyx_.get()) {
showaboutlyx_.reset(new Dialog(lv_, *this));
}
static_cast<Dialog *>(showaboutlyx_.get()>->controller().show();
}
3. Lazy construction. Use boost::function privately.
The Dialogs are stored as a vector<boost::shared_ptr<DialogBase> > dialogs_;
We also store boost::function0<void> show_aboutlyx_;
void Dialogs::showAboutLyX()
{
typedef GUI<ControlAboutlyx, FormAboutlyx, OkCancelPolicy, xformsBC> Dialog;
if (!showaboutlyx_.connected()) {
boost::shared_ptr<Dialog> dialog(new Dialog(lv_, *this));
// not sure about the semantics here.
show_aboutlyx_ = boost::bind(dialog->controller().show()...);
}
show_aboutlyx();
}
Which would you prefer?
Angus
