Re: [gtkmm] pack_start and AttachOptions is still confusing

["Marcelo E. Magallon" <marcelo magallon bigfoot com>]

>> Michael Babcock <mbabcock la creatureshop henson com> writes:

 > > After thinking about it, the example I mentioned previously now makes
 > > sense: a horizontal separator without "fill" set has null size.  But
 > > you don't want to set expand on it because you want it to be as large
 > > as the largest element in the group, not larger.
 >
 > Do you mean 0 horizontal size?

 Yes.

 > A separator without "fill" is Gtk::SHRINK

 Uhm... I guess.   The source of my confusion is that for tables you can
 set EXPAND *and* FILL *and* SHRINK independently.  If all three are set
 to false, all I get (for a horizontal separator) is a dot.  If I set
 FILL, then I get a line as wide as the widest element in the column.
 If I set EXPAND I get a line which makes the whole column wider.

 > and it wouldn't make sense to set that horizontally for a hseparator
 > because as you say the size would shrink to zero.

 Right.

 > By group, you mean column, right?

 Yes.

 > Yes, with a Table you have the additional factor of the column width,
 > so you can be allocated more space than expected with a Box. So
 > Gtk::SHRINK is equivalent to Gtk::EXPAND if another row has a wider
 > column!

 Yes.

 > I guess I'm basically agreeing with you, just trying to understand
 > the issue better. The problem here _seems_ to be an overloading of
 > the EXPAND term. In the case of a Table, it both indicates to fill
 > extra allocated column space with padding, _and_ possibly to expand
 > the amount allocated to that widget within the row, which in turn
 > would increase the column size.

 Yes.

 > Gtk::SHRINK expands the column to at least the widget's size request.
 > If the column is wider, fill extra space with padding.

 Ok.  Got it.  I have to set the widget's width and SHRINK.  I don't
 need FILL.  The widget will have the size I specified if the column is
 wider.  If I don't set SHRINK the widget contracts to it minimum size.

 > Gtk::EXPAND expands the cell based on the other cells in the row. Set
 > the colunn width to the maximum of the cell width and existing column
 > width, fill extra space with padding.

 Yes.

 > Gtk::EXPAND|Gtk::FILL as above, but fills space by increasing widget
 > size.

 Yes.

 > So Gtk::FILL alone would be like Gtk::EXPAND|Gtk::FILL except it
 > would not increase the column width? It does seem to be different
 > than Gtk::SHRINK, right?

 Yes, now I see the difference.  It only exists if I specify a minimum
 width.  (Same thing in the y direction).

 Thanks,

 Marcelo