Re: Why does this behave the way it does?

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

Btw, have you considered using Gtk::Fixed instead of Table or Grid? I 
has its own drawbacks, though. Its description lists several reasons not 
to use it. I've never used it, and I don't know how useful it is.
Kjell

2012-02-29 19:36, Kjell Ahlstedt skrev:
> 2012-02-29 16:16, D. R. Evans skrev:
> > Oooh! That's interesting. Thank you for making things much clearer.
> >
> > So suppose that the bug were fixed, and also suppose that I switch to 
> > using
> > a Grid instead of a Table (since if that's deprecated, they might not be
> > willing to fix any bugs related to it). How would I get the Grid NOT to
> > ignore those cells where nothing has been attached?
> When I tested with Grid, I added two empty labels like so:
>
> // Force the grid to contain N_ROWS x N_COLS cells
>   Gtk::Label dummy1;
>   Gtk::Label dummy2;
>   grid.attach(dummy1, 0, 0, N_COLS, 1);  // left, top, width, height
>   grid.attach(dummy2, 0, 1, 1, N_ROWS-1);  // left, top, width, height
>
> Now I've made some more tests. I also added
>   dummy1.set_size_request(SCREEN_WIDTH, SCREEN_HEIGHT/N_ROWS);
>   dummy2.set_size_request(SCREEN_WIDTH/N_COLS, SCREEN_HEIGHT - 
> SCREEN_HEIGHT/N_ROWS);
>
> and all of a sudden the size is correct! This trick works also with 
> Table.
>
> It's probably important to have at least one widget that spans only 
> one column, and one widget (not necessarily another one) that spans 
> only one row. The size request routines in GtkTable (and probably also 
> in GtkGrid) make a clear distinction between widgets that span a 
> single row and those that span multiple rows. The same goes for single 
> and multiple columns.
>
> If you can accept one empty row and one empty column, where you attach 
> empty widgets (e.g. labels) it seems you can get the table or grid 
> size you want. I admit it's not very nice. With a Grid I think you 
> must anyway make sure a least one widget is attached to each column, 
> and one widget to each row. Ignoring empty rows and empty columns is 
> meant to be a great advantage of Grid, I believe. Often it is, but not 
> in your case.
>
> Kjell