[gtkmm] Reload changed image on button

[Kevin Börgens <kevin boergens de>]

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Hi!

I've started using gtkmm four weeks ago and just ran in my first real problem. 
Maybe you can help:

I have a button. This button displays two changing images. Reloading the image 
via MyImage.set("differentfile.xpm") is too slow.

So I had the following idea


class KWindow: public Gtk::Window
{ public: 
    KWindow()
    { nums.add(*(new Gtk::Image("icon_mul.xpm")));
       store=new Gtk::Image("icon_mulused.xpm");
       add(nums);
       show_all(); }
    ~KWindow()
    { delete nums.get_child();
        delete store; } }
  protected:
    Gtk::Button nums;
    Gtk::Widget* store;
    void flip ()
    { Gtk::Widget* temp_image=store;
        store=nums.get_child();
        nums.remove();
        nums.add(*temp_image);
        show_all(); }
      return; } };

But that isn't just ugly, even worse, it doesn't work: The new images are 
loaded and dispappear again.

How would you solve this problem?

Any help appreciated,
 Kevin
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