I figured it out -- it had to do with the layers and the (appearent)
difference between the E_LAYER_SET() macro and the evas_object_layer_set()
function. This is the working incantation (code):
evas_object_move(m->sw_bg_object,m->cur.x,m->cur.y);
evas_object_resize(m->sw_bg_object,m->cur.w,m->cur.h);
//E_LAYER_SET(m->sw_bg_object,E_COMP_CANVAS_LAYER_MENU);
E_LAYER_SET(m->container_object,E_COMP_CANVAS_LAYER_MENU);
evas_object_layer_set(m->sw_bg_object,E_COMP_CANVAS_LAYER_MENU-1);
short bg_layer = evas_object_layer_get(m->sw_bg_object);
short container_layer = evas_object_layer_get(m->container_object);
fprintf(stderr,"*** e_start_menu_activate_mouse: bg_layer is %d,
container_layer is %d\n",bg_layer,container_layer);
evas_object_show(m->sw_bg_object);
I need to do an E_LAYER_SET on the *container_object*, which is an elm_table
widget, swallowed into sw_bg_object, a Edje object
("e/widgets/menu/default/background"). *Then* I need to use
evas_object_layer_set() to set sw_bg_object's layer to be just below the
container_object. If I use E_LAYER_SET only on the sw_bg_object, nothing
*visible* happens. If I use E_LAYER_SET on both the sw_bg_object and the
container_object, I get a transparent background (sw_bg_object is not seen).
If I use E_LAYER_SET on only the container_object, I get the proper
background, but it is at too low a layer (other windows are above it as shown
in http://www.deepsoft.com/home/layersetcontaineronly/). But the 'trick' of
using E_LAYER_SET on the container_object and then using evas_object_layer_set
with a layer one level down on the sw_bg_object works correctly. I don't know
if this is a bug or feature...
At Wed, 19 Mar 2014 16:42:13 -0400 Robert Heller <hel...@deepsoft.com> wrote:
>
> At Fri, 14 Mar 2014 12:18:49 +0900 Carsten Haitzler (The Rasterman)
> <ras...@rasterman.com> wrote:
>
> >
> > On Thu, 13 Mar 2014 21:37:10 -0400 Robert Heller <hel...@deepsoft.com> said:
> >
> > > 'canvas' is the second argument to e_start_menu_realize_inwindow(), that
> > > is
> > > the background object. Maybe that is wrong? What is the correct way to
> > > get a
> > > Evas_Object pointer to use as the 'canvas' for creating elm widgets on?
> > > Somehow I need to get from the Evas pointer to the something to create
> > > elm
> > > widgets on.
> >
> > any object will do - it gets the canvas from the object.
> >
>
> OK, I *think* I know what is going on. The table widget does not itself have
> a backgroud -- it get that from its 'parent', (eg an elm_win widget or
> something). The thing here is that the table does not have an *elm* widget
> as
> a parent. Its 'parent' (such as it is) is a bare Edje Evas_Object.
> Basically
> I am creating a Edje Evas_Object and setting it up as a menu background:
>
> /* Create a window, and realize the menu in it. */
>
> o = edje_object_add(e_comp_get(m->zone)->evas);
>
> evas_object_name_set(o, "start_menu->sw_bg_object");
>
> evas_object_data_set(o, "e_start_menu", m);
>
> e_theme_edje_object_set(o, "base/theme/menus",
>
> "e/widgets/menu/default/background");
>
> m->sw_bg_object = o;
>
>
> And then using this as the parent object when I create the table:
>
> /* Create the menu container, an Elm Table widget. */
>
> o = elm_table_add(canvas); /* canvas IS m->sw_bg_object */
> fprintf(stderr,"*** e_start_menu_realize_inwindow(): elm_table_add(%p)
> returns %p\n",canvas,o);
> m->container_object = o;
>
> And finally I am using edje_object_part_swallow() to swallow the elm_table
> into the background object. I'm guessing this is wrong. I need to do
> something different somewhere, but I am unsure what I should be doing.
>
> There isn't any good documentation on what is the proper way to use elm
> widgets with Enlightenment itself. The Enlightenment 'widgets' (and even more
> primitive e_<thing> things) leave lots to be desired and are poorly documented
> and are effectively depreciated -- eventually Enlightenment will move to use
> Elementary (elm) widgets, so there must be a proper way to do this. Or at
> least there is a contemplated way of doing this. What is it?
>
>
--
Robert Heller -- 978-544-6933 / hel...@deepsoft.com
Deepwoods Software -- http://www.deepsoft.com/
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