Re: Adjustment problem

["Paul Davis" <pjdavis engineering uiowa edu>]

This definitely looks to be a bug in gtk+ so far.

Doing the follow is a work around:

int main(int argc, char * argv[])
{
   Gtk::Main m(&argc, &argv);

   Gtk::Window w;
   Gtk::Adjustment adj(25, 0, 100, 1, 10, 10);
   adj.set_value( 25 ) ;

   Gtk::SpinButton spin(adj, 1, 0);

   w.add(spin);
   w.show_all();

   m.run(w);

   return 0;
}

I'm not entirely clear on how gtk+ properties work, but what I'm seeing in 
gtkadjustment.c is that the gtk_adjustment_new function is passing the values to the g_object_new as properties.  But when get/set_value is called, its using member variables of the gtkadjustment structure.

I've added a couple lines to gtk+ to try and see if setting the structure values along with the property values will fix this.  After its done compiling I'll write to say if it worked or not.

And if it does we'll have to register a bug with the gtk guys.

Paul

On 10/31/06, Amadeus W.M. < amadeus84 verizon net> wrote:

On Mon, 30 Oct 2006 17:46:03 -0600, Paul Davis wrote:

> If you write up a quick example I'll take a look real quick and digg into
> gtk if necessary.  Sounds an awfull lot like a bug of them not getting
> initialized at instantiation.
>
> Paul
>
> On 10/30/06, Amadeus W.M. <amadeus84 verizon net> wrote:
>>
>> I have a spin button, which I create like so:
>>
>>    Gtk::Adjustment *spinbutton1_adj = Gtk::manage(new class
>> Gtk::Adjustment(25,
>> 0, 100, 1, 10, 10));
>>    spinbutton1 = Gtk::manage(new class Gtk::SpinButton(*spinbutton1_adj,
>>    1, 0));
>>
>> Notice the default value of 25.
>>
>> In gtkmm-2.8.8 the spin button actually gets displayed with that value of
>> 25. However, under gtkmm-2.10.2 (in FC6) the spinbutton is displayed with
>> the value 0.
>>
>> I have TONS of spin buttons in my application, all set to 0 upon startup.
>>
>> What should I be looking into? The gui part of the code was generated with
>> glademm but I don't think that should matter, should it? The constructor
>> of the adjustment is called as I showed above. And that agrees with what I
>> saw on the online doc page.
>>
>> Why is the value not being set?
>>
>>
>>
>> _______________________________________________
>> gtkmm-list mailing list
>> gtkmm-list gnome org
>> http://mail.gnome.org/mailman/listinfo/gtkmm-list
>>
> If you write up a quick example I'll take a look real quick and digg into gtk if necessary.&nbsp; Sounds an awfull lot like a bug of them not getting initialized at instantiation.<br><br>Paul<br><br><div><span class="gmail_quote">
> On 10/30/06, <b class="gmail_sendername">Amadeus W.M.</b> &lt;<a href="" href="mailto:amadeus84 verizon net">amadeus84 verizon net"> amadeus84 verizon net</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
> I have a spin button, which I create like so:<br><br>&nbsp;&nbsp; Gtk::Adjustment *spinbutton1_adj = Gtk::manage(new class Gtk::Adjustment(25,<br>0, 100, 1, 10, 10));<br>&nbsp;&nbsp; spinbutton1 = Gtk::manage(new class Gtk::SpinButton(*spinbutton1_adj,
> <br>&nbsp;&nbsp; 1, 0));<br><br>Notice the default value of 25.<br><br>In gtkmm-2.8.8 the spin button actually gets displayed with that value of<br>25. However, under gtkmm-2.10.2 (in FC6) the spinbutton is displayed with<br>the value 0.
> <br><br>I have TONS of spin buttons in my application, all set to 0 upon startup.<br><br>What should I be looking into? The gui part of the code was generated with<br>glademm but I don't think that should matter, should it? The constructor
> <br>of the adjustment is called as I showed above. And that agrees with what I<br>saw on the online doc page.<br><br>Why is the value not being set?<br><br><br><br>_______________________________________________<br>gtkmm-list mailing list
> <br><a href="" href="mailto:gtkmm-list gnome org">gtkmm-list gnome org">gtkmm-list gnome org</a><br><a href="" href="http://mail.gnome.org/mailman/listinfo/gtkmm-list"> http://mail.gnome.org/mailman/listinfo/gtkmm-list">http://mail.gnome.org/mailman/listinfo/gtkmm-list</a><br></blockquote></div><br>
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list


If you do get a chance to take a look at this, would you please let me
know? I have to give a presentation on Friday. The bulk of the
presentation is a live demo, and my gui is not working. I'd look
into gtkmm, but I don't know the iternals. Thanks!




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