Re: Creating widgets at runtime

[Ondřej Tůma <konference webjet cz>]

Hi, the simplest way ho to do it, is with dynamic allocations. So

Gtk::Button* button = new Gtk::Button('Dynamic Button');

when you create button by this way, you must call delete after
destroying the HBox for example. If u want to destructor call this
automaticly, you must create object by this way: 

Gtk::Button* button = manage (new Gtk::Button('Dynamic Button'));

More about this technique is on Tutorial on Chapter 18. Memory management.

On Fri, 8 Sep 2006 23:16:02 -0700 (PDT)
andypaxo <nabble andypaxo net> wrote:

> 
> I have a little experience with gtkmm, but just trying something new at the
> moment...
> 
> I'm trying to add widgets to a program at runtime (as a simple example,
> adding buttons to an HBox in response to user input). However I'm not
> getting very far.
> 
> Having tried several approaches and having scoured the internet and the docs
> for some time, I am getting nowhere.
> 
> WARNING: There's a high probability that I'm really over-complicating things
> here
> (You most likely don't want to read this bit!)
> -  My first thought was to simply declare a new button in a method and add
> it to the HBox as you would with a member variable button, but nothing
> appears
> -  My second thought was to create a std::vector containing
> Glib::RefPtr<Gtk::Button> objects (in order to hold onto the button after
> the method call had ended);
>    However, there seems to be no way to add the RefPtr object to an HBox
> (and no way to add a plain button to a vector)
> 
> So, if anyone knows a way to generate widgets at runtime, it would be great
> to hear it,


-- 
Ondrej Tuma

Unix-like system is the best operation system from the top of the world.
I'm lucky BSD and linux user. :) Use unix-like, be free. :)

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