Re: Howto set maximum window size ?

[Bob Caryl <bob fis-cal com>]

Nil Gradisnik wrote:

> "add a handler for the realize event, and do this there."
> hmm... how ? :)
>
> How do I fix this, how do I realize window.
> I really need some example code to get this.. I'm still learning gtkmm.
>
> On 6/1/05, *Paul Davis* <paul linuxaudiosystems com 
> <mailto:paul linuxaudiosystems com>> wrote:
>
>     >set_geometry_hints(???, geometry, Gdk::HINT_MAX_SIZE);
>     >.
>     >.
>     >.
>     >
>     >Now I don't know what to use here, the "window.gobj()" is clearly
>     not=20
>     >working.
>
>     you can't do this until the widget (main window) has been
>     realized. until that time, its just a data structure in your
>     program -
>     the X server doesn't know anything about it and no window actually
>     exists.
>
>     add a handler for the realize event, and do this there.
>
>     --p
Add a function to your derived class called "Sysinfo::on_realize".  In 
that function make the calls you were trying to make in the constructor, ala

   void Sysinfo::on_realize(void)
   {
       Gdk::Geometry geometry;
       geometry.max_height = 800;
       geometry.max_width = 600;
       set_geometry_hints(this->gobj(), geometry, Gdk::HINT_MAX_SIZE);
   }

Then, in your constructor itself include the following line:

   signal_realize().connect(sigc::mem_fun(*this, &Sysinfo::on_realize));

Thus your geometry settings function will be called *after* the window 
is realized thereby allowing the gobj() call to proceed normally.

Sincerely,
Bob Caryl