Re: emitting a signal for refeshing entries

[Peter Van Osta <pvosta unionbio-eu com>]

Hi,

Thank you all for the replies, but what I am looking for is a way to 
send an "EXPOSE" signal to the main window and wiil this signal 
propagate to all the widgets in this main window ?

I have the callback for "expose events" ready and I have used the 
GtkAdjustment.

As it looks now I will have to send an "expose_event" signal to each 
widget individually as this signal cannot be emitted/sent to all the 
widgets at once ? There si no way to send a signal to all widgets at once ?

Best regards,

Peter Van Osta

Union Biometrica N.V./S.A.
European Scientific Operations (ESO)
Cipalstraat 3
B-2440 Geel
Belgium
Tel.: +32 (0)14 570 620
Fax.: +32 (0)14 570 621

http://www.unionbio-eu.com/

http://ourworld.compuserve.com/homepages/pvosta/cvwww.htm

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Paul Davis wrote:
> > A parameter can vary form 1 to 100 and I want the spinbutton to show 
> > this value from this parameter when it changes in the program not only 
> > by interaction. I now how to set it from within the software, but I 
> > would like to ahve all callback function that react on "expose" events 
> > to be activated at once.
>
>
> reading this more carefully, this is a perfect candidate for using a
> GtkAdjustment. Just create it with the relevant parameters:
>
> 	       initial value
> 	       lower bound
> 	       upper bound
> 	       small step size
> 	       page step size
>
> then when you create the spinbutton attach it to this adjustment.
>
> in your code, when you want to change the value, set the value of the
> adjustment and the spin button will change. connect to the
> adjustment's "value_changed" signal if you want to know when the
> spinbutton or your code has changed the value.
>
> be careful to avoid feedback loops. write things like:
>
>    gfloat adjuster_value = gtk_adjustment_get_value (GTK_ADJUSTMENT(adjuster));
>
>    if (adjuster_value != parameter_value) {
>         gtk_adjustment_set_value (GTK_ADJUSTMENT(adjuster),
>         parameter_value);
>    }
>
> this assumes that you have the parameter stored elsewhere in the
> program (i.e. it can't actually be a GtkAdjustment itself).
>
> --p