---------- Forwarded message ---------
From: Giorgos Xou <[email protected]>
Date: Tue, Jun 16, 2026 at 4:35 AM
Subject: Re: move_panel not working with pads
To: Thomas Dickey <[email protected]>
On Mon, Jun 15, 2026 at 07:11:11PM -0400, Thomas Dickey wrote:
> On Mon, Jun 15, 2026 at 06:12:27PM -0400, Bill Gray wrote:
> > On 6/15/26 16:56, Thomas Dickey wrote:
> > > On Mon, Jun 15, 2026 at 02:57:45PM -0400, Bill Gray wrote:
> > > > Hmmm... please post the test code you're using for this? Have
you tried
> > > > it with PDCursesMod? (Its panel library is a near-total rewrite,
but its
> > > > move_panel() does use mvwin() internally.)
No, I haven't tested it against PDCursesMod nor PDCurses, it was just a
speculation
considering it uses mvwin internally too.
> > >
> > > yes... a test-program is needed to see how it compares with the
> > > various implementations :-)
Here's a simple test-program i guess :-D
```
#include <curses.h>
#include <panel.h>
int main( void)
{
int ch = -1;
int y = 0, x = 0;
WINDOW *pad1;
PANEL *panel1;
initscr ();
noecho ();
start_color();
init_pair(1, COLOR_BLUE, COLOR_RED);
keypad(stdscr, TRUE);
refresh();
pad1 = newpad(10,10);
wbkgd (pad1, COLOR_PAIR(1));
waddstr (pad1,"Test.");
prefresh(pad1, 0, 0, 1, 2, 4 , 9);
panel1 = new_panel(pad1);
while(ch != 'q' && ch != 'Q')
{
ch = getch();
if (ch == KEY_UP ) ++y;
else if (ch == KEY_DOWN ) --y;
else if (ch == KEY_RIGHT) ++x;
else if (ch == KEY_LEFT ) --x;
move_panel(panel1, y, x);
update_panels();
}
endwin( );
return(0);
}
```
> >
> > It occurs to me to wonder : is the panel library warranteed to work
if
> > you feed it a pad (or subpad or sub-window) instead of a plain old
window?
> > I've never tried it.
Had the same thoughts, never tried it too.
> >
> > Is there a use case for calling new_panel( ) with a pad?
Pads are really useful with anything involving scrollable text (such as
logs, lists, fancy-tuifimanager stuff etc.).
As you already know, the main appeal of panels is the fact that they
solve the flickering issue of stacked windows in a more elegant way
than manually doing so.
Therefore pads with panels are practically useful for anything that
already previously involved plain old stacked-windows but with
too-much text.
A few practical examples I can think of using pads with panels are
thinks like:
- https://www.reddit.com/r/neovim/comments/1u49mnw/
- https://www.reddit.com/r/commandline/comments/1tbfeua/
- https://github.com/reekta92/graf
- plus, fancy modern-TUI animations?
>
> maybe - but pads differ from windows by being more readily movable
>
> >
> > -- Bill
> >
> > > > -- Bill
> > > >
> > > > On 6/15/26 14:20, Giorgos Xou wrote:
> > > > > move_panel internally uses mvwin, which doesn't work with pads
(pdcurses
> > > > > seems to be affected by this as well). Maybe pnoutrefresh could
be used
> > > > > internally for that specific case or some kind of an alternative
new
> > > > > mvpad function?
> > > > >
> > > > > (It just happened that I was again looking deep into how panels
work
> > > > > internally and just happened to stumble upon this issue.)
> > > > >
> > > > > *Cross-refs: *
> > > > > 3. ncurses 6.3 - patch 20211106 <
https://github.com/mirror/ncurses/commit/f399f54c6c4ea2143afcbf704ce9af0be52b63fc
>
> > > > > 2. hide_panel/show_panel not working with pads.
> > > > > <
https://lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00037.html>
> > > > > 1. https://github.com/wmcbrine/PDCurses/issues/124
> > > > > <https://github.com/wmcbrine/PDCurses/issues/124>
> > > >
> > > >
> > >
> >
>
> --
> Thomas E. Dickey <[email protected]>
> https://invisible-island.net
PS. For some reason html "reply via email to" didn't work and I had to
figure out how (this cool thing that is called) neomutt works. so I've
no idea how this mail will be sent or if it actually was sent
correctly.
