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

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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