Re: Goocanvas in update from Gtk2 to Gtk3

[Paul Emsley <pemsley mrc-lmb cam ac uk>]

On 18/01/2021 17:33, damonachaplin gmail com wrote:
> On Mon, 2021-01-18 at 12:34 +0000, Paul Emsley via goocanvas-list
> wrote:
> > I get a number of add private warnings, e.g.
> >
> > goocanvas.c:1130:13: warning: G_ADD_PRIVATE
> >
> > I presume that I can ignore those.
> >
> > Other than that, this is the only concern:
> >
> >     CC       goocanvasitemsimple.lo
> > goocanvasitemsimple.c: In function
> > 'goo_canvas_item_simple_set_model':
> > goocanvasitemsimple.c:1539:15: warning: assignment to
> > 'GooCanvasItemModelSimple *' {aka 'struct _GooCanvasItemModelSimple
> > *'}
> > from incompatible pointer type 'GooCanvasItemModel *' {aka 'struct
> > _GooCanvasItemModel *'} [-Wincompatible-pointer-types]
> >    1539 |   item->model = g_object_ref (model);
> >         |               ^
>
> Yes, these aren't important. Mainly due to still using deprecated
> stuff, and not specifying a type explicitly.
>
>
>
> > I copied over toroid.png to the out-of-tree demo directory and ran
> > it there. I get no longer get the "Could not find the toroid.png sample
> > file"
> >
> > message, but the "drawing failure for widget" errors remain, as do
> > the
> > missing menu bar and flashing graphics.
>
> If you send me your out-of-tree sources I'll have a look.

My apologies for not being more clear. I have downloaded goocanvas-2.0.4 
and am discussing the differences between:
$ ./configure --prefix=$HOME/goocanvas
and (from a parallel build directory)
$ ../goocanvas-2.0.4/configure --prefix=$HOME/goocanvas

> I suspect a
> problem with the build commands (i.e. with libtool) but I'm not sure.

I noticed that if I did:
$ bash ../goocanvas-2.0.4/configure --prefix=$HOME/goocanvas

then everything went to pot (i.e. libtool was in a mess)

> If I run the demo outside the demo directory I get the flickering too.
> It is a bit odd. (But I don't think it is a goocanvas problem.)

Oh wow - good, I think. OK, so I can repeat that. If I go up a 
directory, copy toroid.png and do
$ demo/demo
I see the same thing (missing menu bar, flashing graphics).

But maybe this is red herring. I will get back to work on a stand-alone 
example.

Paul.