Re: GtkBuilder bugs

[Tristan Van Berkom <tvb gnome org>]

On Mon, Sep 5, 2011 at 12:43 PM, Michal Suchanek <hramrach centrum cz> wrote:
> On 5 September 2011 11:29, Tristan Van Berkom <tvb gnome org> wrote:
> > On Mon, Sep 5, 2011 at 10:49 AM, Michal Suchanek <hramrach centrum cz> wrote:
> > > On 4 September 2011 12:32, Tristan Van Berkom <tvb gnome org> wrote:
> > > > Its a bug that needs to be fixed in Glade.
> > > >
> > > > You can remove the line that says n-rows safely fwiw
> > >
> > > I don't think that an extra property would break the widget, the
> > > warning should be harmless.
> >
> > Anything that GtkBuilder encounters that is unrecognized (unrecognized
> > xml tags, properties and even unknown/inexistant GObject properties) cause
> > GtkBuilder to either abort or fail to parse.
>
> For me unknown properties are just ignored, at least in gtk 2.

Ah my bad, indeed only a warning is issued for a misplaced
property (the warnings which the Bernhard originally mentioned).

> > > > On Sun, Sep 4, 2011 at 1:41 AM, Bernhard Schuster
> > > > <schuster bernhard googlemail com> wrote:
> > > > > I am using a gtk-builder file for my application, which uses a Grid
> > > > > widget for layouting. When I run the application, I read this:
> > > > >
> > > > > Gtk-WARNING **: Unknown property: GtkGrid.n-rows
> > > > >
> > > > > and the grid is not shown (nor its contents)
> > >
> > > Are you by any chance using glade 3.10?
> > >
> > > That won't work.
>
> With Gtk 2 which does not know about Grid.
>
> > No Glade earlier than 3.10 allows you to edit a GtkGrid, however
> > the Grid implementation is based on the old GtkTable implementation.
> >
> > To remove the erronously serialized n-rows/n-columns properties from
> > GtkGrid in Glade we first need to add some code to the GtkGrid deserialization
> > routine to "guess" the span in row/columns based on the span of all children
> > and number/position of added placeholders.
>
> If gtk3 cannot display the glade files made for it with glade 3.10
> that's quite odd.

Agreed, however while Glade is usually behind GTK+ in terms of features
so often times Glade chokes out on hand crafted GtkBuilder xml which might
contain tags that Glade does not yet recognize.

But the opposite should usually never be a problem, unless we introduce
features with some severe bugs then files created by Glade should always
be readable by GtkBuilder (in this case we introduced GtkGrid with a bug
that at least only causes a warning... unless there is more to this
GtkGrid story...).

> I can see them in glade-previewer just fine but that's the only gtk3
> app which I use with these.

Indeed, I'm not sure what is the story with GtkGrid not showing the content
when loaded in a preview or an application (and the preview quite litteraly
does what an application would do).

Bernhard, can you perhaps attach the Glade file in question which does
not show the contents of the GtkGrid ?

Regards,
       -Tristan