Re: Error when executing my app

[Havoc Pennington <hp redhat com>]

Carlos Pereira <carlos pehoe civil ist utl pt> writes: 
> 1) when you show_all your widgets you are giving away
> the fin control that you have when explicitly showing
> each widget at a time. You always know better what
> and when to show than gtk possibly can. Sometimes
> you specifically want to show some widgets and hide
> others and gtk_widget_show_all cannot handle this. 
> (For example, the way to get variable size notebooks
> is to hide the content of all pages and then show only
> the current one. With gtk_widget_show_all (window), gtk 
> will show all pages and the size gets wrong).

So just don't use show_all() if you are hiding some widgets - this is
pretty intuitive. ;-)

> 2) There is at least one case where the widget should 
> not be shown (the menu widget). I don't know if 
> gtk_widget_show_all can handle this well.

It handles it properly.

> 3) There might be cases where the order used to show 
> the widgets and to connect signals might be important. 
> Usually you want the window to be shown in the end so
> everything pops up at once. Probably gtk_widget_show_all
> does this as well, but you are not really in control...
> you could want it the other way around...

show_all always shows the toplevel last, which is always what you
want.

> 4) Sometimes using gtk_widget_show_all, sometimes
> using gtk_widget_show, just adds to confusion. When
> you see the code of someone else, you never know
> if he forgot a gtk_widget_show instruction or he added
> a gtk_widget_show_all instruction 300 lines further down.

Unless you always use show_all() for consistency...

> 4) Last but not the least, all the examples that come with 
> gtk, made by those who know better, never use gtk_widget_show_all.

Because show_all() didn't exist when the examples were written. ;-)

Havoc