Re: Minutes of the GTK+ Team Meeting - 2010-12-14

[Tristan Van Berkom <tristanvb openismus com>]

On Wed, 2010-12-15 at 15:42 +0100, Murray Cumming wrote:
> On Wed, 2010-12-15 at 22:53 +0900, Tristan Van Berkom wrote:
> > There's one behavioural change, gtk_tree_view_set_cursor() when
> > specifying "start_editing = TRUE" will no longer toggle the state
> > of an activatable cell (this used to be the case, we thought it
> > was an undesirable side effect since the api is more about bringing
> > attention to a cell for the user to edit but not implicitly 
> > modifying the data).
> 
> I don't understand. Do you mean that start_editing=TRUE won't start
> editing? If so, can't we remove that parameter?
> 
> Or, if not, what "state" do you mean? How did this change the data
> before?

What I mean is "activatable" cells like GtkCellRendererToggle.

Previously setting the cursor on a toggle renderer cell and 
specifying "start_editing" = TRUE caused the cell to actually
"activate" (i.e. it would usually result in a toggled state).

now start_editing only does what the docs say it does, it only
starts editing an editable cell.


> > Other than that is seals the whole GtkTreeViewColumn structure so
> > if people are accessing some members of the column directly they
> > will have to find other means to do this (I dont expect there
> > to be any valid reason for accessing these members directly though,
> > we did expose gtk_tree_view_column_get_button() for the sake
> > of libgail and apps that set tooltips on the column headers).
> 
> And you've _added_ API, right? So we can now get a GtkCellArea, so we
> can do slightly more complex layout of cells within a GtkTreeViewColumn.

Yes without speaking of any api changes in previous apis, we've added
the GtkCellArea api.

Any cell layout in GTK+ (after the branches land) can be created with
a custom GtkCellArea as well.

Furthermore GtkCellArea packing properties are parsed by GtkCellLayout
builder code (so you can set things like "align" and "expand" in the
<cell-packing> tags when adding cell renderers to things like
GtkTreeViewColumn, icon view or combo-box).

Cheers,
          -Tristan