Re: dev: question about glist_isvisible() and gobj_shouldvis()

Not sure what you're facing, but when I need to update a GUI I just check
for both and do things when both flags are true... but I never bothered to
go deeper, it just works for me. What exactly is your problem?

cheers

Em qua., 20 de ago. de 2025 às 08:49, Pierre Alexandre Tremblay <
[email protected]> escreveu:

> … which makes me think that I need to find a similar tutorial to move away
> from the deprecated ‘sys_vgui’ towards 'pdgui_vmess()’… yet as I use arrays
> and other data structures in the TK, I feel it might require a full
> refactor...
>
> Again pointers welcome again
>
> > On 20 Aug 2025, at 13:34, Pierre Alexandre Tremblay <[email protected]>
> wrote:
> >
> > Hello
> >
> > Thanks for this. Sadly, that flag stays 1 when the [pd] subpatch window
> containing my GUI is closed. I must be missing something.
> >
> > What is the simplest GUI source code I can read, ideally with loads of
> comments, to see the best practices? At the moment, when the subpatcher
> window is closed its ‘pdtk_canvas' is destroyed ("pd -d 5” helped a lot to
> understand the ‘dance’)…
> >
> > To reiterate:
> > - glist_isvisible() is 0 when subpatcher is opened
> > -  gobj_shouldvis() is always on, subpatcher opened or not
> >
> > Thanks all and sorry for the newb questions!
> >
> >> On 20 Aug 2025, at 00:13, Miller Puckette via Pd-list <
> [email protected]> wrote:
> >>
> >> It's my belief that gobj_shouldvis() is true if the object should be
> visible on the screen,
> >> and that glist_isvisible() is on if the glist has actually been drawn
> (which is not yet true
> >> while the glist is first being drawn). So I think you should check
> gobj_shouldvis() and
> >> not glist_isvisible().
> >>
> >> cheers
> >> Miller
> >>
> >> On 8/19/25 12:06 PM, Pierre Alexandre Tremblay wrote:
> >>> Hello
> >>>
> >>> I am struggling with a real understanding of when to redraw my 2
> flucoma GUI objects. At the moment, I get them to behave most of the time…
> >>>
> >>> Tldr: why is glist_isvisible 0 when a window hosting my gui is in the
> background at load time?
> >>>
> >>> Any help/good practice/tutorial welcome.
> >>>
> >>> p
> >>>
> >>> ===
> >>>
> >>> The long read:
> >>>
> >>> At the moment I check the status of glist_isvisible && gobj_shouldvis
> and print when both are on (&& vis flag of my own object)
> >>>
> >>> It works all the time, except:
> >>>
> >>> 1. When I load the patch saved with a [pd patcher] with the gui on
> (that window opens, but the gui doesn’t draw, by opposition to native ones)
> >>>
> >>> 2. When I close that subpatch window and reopen it, it is not drawn.
> >>>
> >>> 3. When I zoom in/out
> >>>
> >>> In both cases it calls my _draw method but the flag glist_isvisible is
> 0 (with the added ‘fun’ of calling the draw function twice when I zoom in
> or out, once with the flag 1 and right after with the flag 0
> >>>
> >>> What have I done wrong? The source code is online, I can send a link….
> >>>
> >>>
> >>>
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