bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Thierry Volpiatto]

Hello,

when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
x-popup-menu and larger than (window-height) doesn't have a scroll bar.
The part which is shown is the center part (first lines and last lines
doesn't appear).  This doesn't happen with a default build (gtk).

I don't know if it is a misfeature of Lucid or an emacs bug.

Thanks.


In GNU Emacs 29.4 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.16.0, Xaw3d scroll bars) of 2024-06-23 built on IPad-S340
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Linux Mint 21.3

Configured using:
 'configure CFLAGS=-O8 --bindir=/usr/local/sbin/emacs-29.3 --with-cairo
 --with-x-toolkit=lucid --with-modules --without-tree-sitter
 --without-native-compilation'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
X11 XAW3D XDBE XIM XINPUT2 XPM LUCID ZLIB

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  locale-coding-system: utf-8-unix

Major mode: 

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Load-path shadows:
None found.

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Memory information:
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<#secure method=pgpmime mode=sign>

-- 
Thierry

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Thierry Volpiatto <thievol@posteo.net> writes:

> Hello,
>
> when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
> x-popup-menu and larger than (window-height) doesn't have a scroll bar.
> The part which is shown is the center part (first lines and last lines
> doesn't appear).  This doesn't happen with a default build (gtk).
>
> I don't know if it is a misfeature of Lucid or an emacs bug.

lwlib doesn't support this feature.  I suggest building with Motif.

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Thierry Volpiatto]

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Po Lu <luangruo@yahoo.com> writes:

> Thierry Volpiatto <thievol@posteo.net> writes:
>
>> Hello,
>>
>> when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
>> x-popup-menu and larger than (window-height) doesn't have a scroll bar.
>> The part which is shown is the center part (first lines and last lines
>> doesn't appear).  This doesn't happen with a default build (gtk).
>>
>> I don't know if it is a misfeature of Lucid or an emacs bug.
>
> lwlib doesn't support this feature.

Thanks for the info, it is what I wanted to know.

> I suggest building with Motif.

Motif seems to have the same problem, quite different though, the
beginning of text is shown (title and next candidates) but the end is
not shown (normal it is out of screen) and we can't scroll further,
only gtk allow moving up and down in the list of candidates.
As with lwlib, I guess it is not supported by motif and out of emacs scope.

-- 
Thierry

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bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Eli Zaretskii]

> Cc: 72791@debbugs.gnu.org
> Date: Sun, 25 Aug 2024 10:32:47 +0800
> From:  Po Lu via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Thierry Volpiatto <thievol@posteo.net> writes:
> 
> > Hello,
> >
> > when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
> > x-popup-menu and larger than (window-height) doesn't have a scroll bar.
> > The part which is shown is the center part (first lines and last lines
> > doesn't appear).  This doesn't happen with a default build (gtk).
> >
> > I don't know if it is a misfeature of Lucid or an emacs bug.
> 
> lwlib doesn't support this feature.  I suggest building with Motif.

OK, but why (window-height)?  Is the intent to the frame height, or
the height of the screen, perhaps?  I don't understand why the height
of the menu should be limited by the window.

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Eli Zaretskii]

> From: Thierry Volpiatto <thievol@posteo.net>
> Date: Sat, 24 Aug 2024 13:39:34 +0000
> 
> when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
> x-popup-menu and larger than (window-height) doesn't have a scroll bar.
> The part which is shown is the center part (first lines and last lines
> doesn't appear).  This doesn't happen with a default build (gtk).

Which menu was too long?  Is it a menu generated by a core Emacs
feature or by 3rd-party package?

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Thierry Volpiatto]

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Eli Zaretskii <eliz@gnu.org> writes:

>> Cc: 72791@debbugs.gnu.org
>> Date: Sun, 25 Aug 2024 10:32:47 +0800
>> From:  Po Lu via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>> 
>> Thierry Volpiatto <thievol@posteo.net> writes:
>> 
>> > Hello,
>> >
>> > when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
>> > x-popup-menu and larger than (window-height) doesn't have a scroll bar.
>> > The part which is shown is the center part (first lines and last lines
>> > doesn't appear).  This doesn't happen with a default build (gtk).
>> >
>> > I don't know if it is a misfeature of Lucid or an emacs bug.
>> 
>> lwlib doesn't support this feature.  I suggest building with Motif.
>
> OK, but why (window-height)?  Is the intent to the frame height, or
> the height of the screen, perhaps?  I don't understand why the height
> of the menu should be limited by the window.

Yes, you are right, I meant the height of the screen.

-- 
Thierry

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bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Thierry Volpiatto]

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Eli Zaretskii <eliz@gnu.org> writes:

>> From: Thierry Volpiatto <thievol@posteo.net>
>> Date: Sat, 24 Aug 2024 13:39:34 +0000
>> 
>> when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
>> x-popup-menu and larger than (window-height) doesn't have a scroll bar.
>> The part which is shown is the center part (first lines and last lines
>> doesn't appear).  This doesn't happen with a default build (gtk).
>
> Which menu was too long?  Is it a menu generated by a core Emacs
> feature or by 3rd-party package?

A menu in Helm, screenshots attached, the first is with Lucid and the
other with Gtk.

-- 
Thierry

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bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Eli Zaretskii]

> From: Thierry Volpiatto <thievol@posteo.net>
> Cc: Thierry Volpiatto <thievol@posteo.net>,  72791@debbugs.gnu.org
> Date: Sun, 25 Aug 2024 06:31:49 +0000
> 
> > Which menu was too long?  Is it a menu generated by a core Emacs
> > feature or by 3rd-party package?
> 
> A menu in Helm, screenshots attached, the first is with Lucid and the
> other with Gtk.

Given this limitation of Lucid, my suggestion would be to organize the
menu into a multilevel menu by grouping related items, to make the
top-level menu shorter.

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Eli Zaretskii]

> From: Thierry Volpiatto <thievol@posteo.net>
> Cc: Po Lu <luangruo@yahoo.com>,  thievol@posteo.net,  72791@debbugs.gnu.org
> Date: Sun, 25 Aug 2024 06:28:54 +0000
> 
> >> > when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
> >> > x-popup-menu and larger than (window-height) doesn't have a scroll bar.
> >> > The part which is shown is the center part (first lines and last lines
> >> > doesn't appear).  This doesn't happen with a default build (gtk).
> >> >
> >> > I don't know if it is a misfeature of Lucid or an emacs bug.
> >> 
> >> lwlib doesn't support this feature.  I suggest building with Motif.
> >
> > OK, but why (window-height)?  Is the intent to the frame height, or
> > the height of the screen, perhaps?  I don't understand why the height
> > of the menu should be limited by the window.
> 
> Yes, you are right, I meant the height of the screen.

OK, thanks.

I've added a PROBLEMS entry about this, and I think we should close
this bug with that.

bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Thierry Volpiatto]

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Eli Zaretskii <eliz@gnu.org> writes:

>> From: Thierry Volpiatto <thievol@posteo.net>
>> Cc: Thierry Volpiatto <thievol@posteo.net>,  72791@debbugs.gnu.org
>> Date: Sun, 25 Aug 2024 06:31:49 +0000
>> 
>> > Which menu was too long?  Is it a menu generated by a core Emacs
>> > feature or by 3rd-party package?
>> 
>> A menu in Helm, screenshots attached, the first is with Lucid and the
>> other with Gtk.
>
> Given this limitation of Lucid, my suggestion would be to organize the
> menu into a multilevel menu by grouping related items, to make the
> top-level menu shorter.

Didn't know it was even possible, I will try this, thanks.

-- 
Thierry

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bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Thierry Volpiatto]

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Eli Zaretskii <eliz@gnu.org> writes:

>> From: Thierry Volpiatto <thievol@posteo.net>
>> Cc: Po Lu <luangruo@yahoo.com>,  thievol@posteo.net,  72791@debbugs.gnu.org
>> Date: Sun, 25 Aug 2024 06:28:54 +0000
>> 
>> >> > when Emacs is built with "--with-x-toolkit=lucid" a menu displayed by
>> >> > x-popup-menu and larger than (window-height) doesn't have a scroll bar.
>> >> > The part which is shown is the center part (first lines and last lines
>> >> > doesn't appear).  This doesn't happen with a default build (gtk).
>> >> >
>> >> > I don't know if it is a misfeature of Lucid or an emacs bug.
>> >> 
>> >> lwlib doesn't support this feature.  I suggest building with Motif.
>> >
>> > OK, but why (window-height)?  Is the intent to the frame height, or
>> > the height of the screen, perhaps?  I don't understand why the height
>> > of the menu should be limited by the window.
>> 
>> Yes, you are right, I meant the height of the screen.
>
> OK, thanks.
>
> I've added a PROBLEMS entry about this, and I think we should close
> this bug with that.

For me it is ok to close, thanks for your help.

-- 
Thierry

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bug#72791: 29.4; x-popup-menu in emacs built with lucid xtoolkit can't scroll

[Eli Zaretskii]

> From: Thierry Volpiatto <thievol@posteo.net>
> Cc: Thierry Volpiatto <thievol@posteo.net>,  luangruo@yahoo.com,
>   72791@debbugs.gnu.org
> Date: Sun, 25 Aug 2024 07:54:16 +0000
> 
> > I've added a PROBLEMS entry about this, and I think we should close
> > this bug with that.
> 
> For me it is ok to close, thanks for your help.

Thanks, closing.