Lmms: Unable to drag and drop anything

[qjnr]

After hours and hours of searching I still couldn't find a solution...

I'm unable to drag and drop samples, instruments and everything! I can't even use LMMS this way anymore! When trying to drag and drop a sample or an instrument the cursor shows a circle with a line through it.

Also, when I use CTRL + drag on a track (#881) LMMS crashes and shows this in the console:

QPixmap::grabWidget is deprecated, use QWidget::grab() instead
QPixmap::grabWidget is deprecated, use QWidget::grab() instead
QPixmap::grabWidget is deprecated, use QWidget::grab() instead
[1]    7742 segmentation fault (core dumped)  lmms

[zonkmachine]

@qjnr What version of lmms is this?
Which Qt version are you using?
What OS/version do you use?

[qjnr]

% lmms -v                                                                     ~
LMMS 1.2.0-rc7
(Linux x86_64, Qt 5.11.2, GCC 8.2.1 20180831)

Copyright (c) 2008-2018 LMMS Developers

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

Try "lmms --help" for more information.

My OS is Arch Linux

[zonkmachine]

Found a similar case in the lmms support channel on discord.

stormy Last Thursday at 11:19 AM
ok for some reason i can no longer drag & drop instruments into the song editor
cursor is constantly in the "not-allowed" state
right-clicking on instrument presets -> open in new instrument-track seems to work
but dragging still doesn't

stormy Last Thursday at 2:37 PM
fixed by downgrading to qt5-base-5.11.2-3

The user stormy is also on Arch Linux.

Running Arch linux 4.18.16, Wine 3.20

[ghost]

I'm also on Arch, I don't experience this. But I did a minimal install of Arch and did setup the desktop enviroment myself (fluxbox). I tried latest LMMS from Arch package manager.
LMMS 1.2.0-rc7 (Linux x86_64, Qt 5.11.2, GCC 8.2.1 20180831)
wine-3.21
4.19.4-arch1-1-ARCH #1 SMP PREEMPT Fri Nov 23 09:06:58 UTC 2018 x86_64 GNU/Linux

[zonkmachine]

It's this bug: https://bugs.archlinux.org/task/61036

[qjnr]

Thank you! I resolved the issue by downgrading Qt!

[zonkmachine]

It looks like all they (Arch team) need to do may be rebuilding the lmms package but it's currently failing.

[justas-d]

FYI Compilation succeeded after downgrading Wine to 3.20, but I am still unable to drag & drop instruments.

QT-base version is 5.12.

CTRL Dragging does not cause crashes. No console output is generated when LMMS is ran from the terminal.

[ion201]

Recompiled with wine 3.20, drag-and-drop still doesn't function - so this issue should be re-evaluated if it relates to QT 5.12 rather than arch specifically?

[ghost]

Can you try if it's ok when you add -DWANT_VST=OFF flag?

[justas-d]

Can you try if it's ok when you add -DWANT_VST=OFF flag?

Did a clean compile using

cmake .. -DWANT_VST=OFF
make -j6

Build succeeded but I was still unable to drag & drop instruments into the song editor.

$ ./lmms -v
LMMS 1.2.0-rc7.391
(Linux x86_64, Qt 5.12.0, GCC 8.2.1 20181127)

$ wine --version   
wine-4.0-rc2

Is anybody able to build & test LMMS with QT 5.12 on a non-arch machine and see if the same regression stands?

[ghost]

If you haven't cleared your pacman cache you could do pacman -U /var/cache/pacman/pkg/wine-3.21-1-x86_64.pkg.tar.xz to downgrade wine to wine-3.21, then compile again.

[justas-d]

wine 3.21 build fails when -DWANT_VST=ON

In file included from /home/justas/builds/lmms/include/MidiEvent.h:28,
                 from /home/justas/builds/lmms/include/RemotePlugin.h:28,
                 from /home/justas/builds/lmms/plugins/vst_base/RemoteVstPlugin.cpp:35:
/usr/include/c++/8.2.1/cstdlib:75:15: fatal error: stdlib.h: No such file or directory
 #include_next <stdlib.h>
               ^~~~~~~~~~
compilation terminated.
winegcc: g++ failed
make[5]: *** [CMakeFiles/RemoteVstPlugin32.dir/build.make:63: CMakeFiles/RemoteVstPlugin32.dir/home/justas/builds/lmms/plugins/vst_base/RemoteVstPlugin.cpp.o] Error 2
make[4]: *** [CMakeFiles/Makefile2:73: CMakeFiles/RemoteVstPlugin32.dir/all] Error 2
make[3]: *** [Makefile:84: all] Error 2
make[2]: *** [plugins/vst_base/CMakeFiles/RemoteVstPlugin32.dir/build.make:111: plugins/vst_base/RemoteVstPlugin32-prefix/src/RemoteVstPlugin32-stamp/RemoteVstPlugin32-build] Error 2
make[1]: *** [CMakeFiles/Makefile2:8076: plugins/vst_base/CMakeFiles/RemoteVstPlugin32.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/justas/builds/lmms/build/plugins/vst_base/RemoteVstPlugin64-prefix/src/RemoteVstPlugin64-build
[ 98%] Performing build step for 'RemoteVstPlugin64'
Scanning dependencies of target RemoteVstPlugin64
[ 50%] Building CXX object CMakeFiles/RemoteVstPlugin64.dir/home/justas/builds/lmms/plugins/vst_base/RemoteVstPlugin.cpp.o
In file included from /home/justas/builds/lmms/include/MidiEvent.h:28,
                 from /home/justas/builds/lmms/include/RemotePlugin.h:28,
                 from /home/justas/builds/lmms/plugins/vst_base/RemoteVstPlugin.cpp:35:
/usr/include/c++/8.2.1/cstdlib:75:15: fatal error: stdlib.h: No such file or directory
 #include_next <stdlib.h>
               ^~~~~~~~~~
compilation terminated.
winegcc: g++ failed
make[5]: *** [CMakeFiles/RemoteVstPlugin64.dir/build.make:63: CMakeFiles/RemoteVstPlugin64.dir/home/justas/builds/lmms/plugins/vst_base/RemoteVstPlugin.cpp.o] Error 2
make[4]: *** [CMakeFiles/Makefile2:73: CMakeFiles/RemoteVstPlugin64.dir/all] Error 2
make[3]: *** [Makefile:84: all] Error 2
make[2]: *** [plugins/vst_base/CMakeFiles/RemoteVstPlugin64.dir/build.make:111: plugins/vst_base/RemoteVstPlugin64-prefix/src/RemoteVstPlugin64-stamp/RemoteVstPlugin64-build] Error 2
make[1]: *** [CMakeFiles/Makefile2:8039: plugins/vst_base/CMakeFiles/RemoteVstPlugin64.dir/all] Error 2

wine --version
wine-3.21

Drag & drop is still broken when building without Vestige. (built using QT 5.12)

[ghost]

I can confirm that this issue is only present in Qt 5.12. I build a simple drag/drop application and did some testing with versions. After a while I got it working on 5.12 by adding dragMoveEvent and accepting it.

So I added the following code and it worked like a charm again.

src/gui/TrackContainerView.cpp

void TrackContainerView::dragMoveEvent( QDragMoveEvent * _dme )
{
    _dme->accept();
}

include/TrackContainerView.h

virtual void dragMoveEvent( QDragMoveEvent * _dme );

[Capital-Asterisk]

I got this exact issue on a nearly-fresh install of Arch. Using the released 1.2.0-rc7 appimage, instead of using the package, works just fine.

[harish2704]

I can confirm that, this bug ( Drag & drop issue ) exists on OpenSUSE Tumbleweed which uses QT-5.12 .

OpenSUSE Tumbleweed users can get patched LMMS RPM from https://build.opensuse.org/package/show/home:harish2704:branches:openSUSE:Factory/lmms

[qjnr]

I can confirm that, this bug ( Drag & drop issue ) exists on OpenSUSE Tumbleweed which uses QT-5.12 .

OpenSUSE Tumbleweed users can get patched LMMS RPM from https://build.opensuse.org/package/show/home:harish2704:branches:openSUSE:Factory/lmms

I tried your patched version, but it still crashes. (OpenSUSE Tumbleweed)

[cschenio]

I can confirm that, this bug ( Drag & drop issue ) exists on OpenSUSE Tumbleweed which uses QT-5.12 .

OpenSUSE Tumbleweed users can get patched LMMS RPM from https://build.opensuse.org/package/show/home:harish2704:branches:openSUSE:Factory/lmms

thanks, work like a charm for me