Spyder: Maximize current plane works wrong

[mlearnx]

Issue Report Checklist

• [x] Searched the issues page for similar reports
• [ ] Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• [ ] Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• [ ] Could not reproduce inside jupyter qtconsole (if console-related)
• [ ] Tried basic troubleshooting (if a bug/error)
  
  
  
  • [ ] Restarted Spyder
  
  
  • [ ] Reset preferences with spyder --reset
  
  
  • [ ] Reinstalled the latest version of Anaconda
  
  
  • [ ] Tried the other applicable steps from the Troubleshooting Guide
  
  
• [x] Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

I frequently use maximize the pane to switch between different ones for productivity.
Since the begining of Spyder 3.3 it does not properly maximize a pane of my interest (command window, text editor and all others).

I updated to the recent version v 3.3.1 but still the problem exists.

I tested Spyder on two machines: Windows 10 and Windows 7.
Thank you so much for your help.

What steps reproduce the problem?

1. Click the maximize pane from the main window or use a shortcut.
2. 
   
   
   3.
   

What is the expected output? What do you see instead?

Please see the image below. The problem is that it has big white spaces.

Paste Traceback/Error Below (if applicable)

PASTE TRACEBACK HERE

Versions

• Spyder version: 3.3.1
• Python version: 3.6.6
• Qt version: 5.9.6
• PyQt version: 5.9.2
• Operating System name/version: Windows 7 and Window 10

Dependencies

IPython >=4.0     :  6.5.0 (OK)
cython >=0.21     :  0.28.4 (OK)
jedi >=0.9.0      :  0.12.1 (OK)
matplotlib >=2.0.0:  2.2.2 (OK)
nbconvert >=4.0   :  5.3.1 (OK)
numpy >=1.7       :  1.15.0 (OK)
pandas >=0.13.1   :  0.23.4 (OK)
pycodestyle >=2.3 :  2.3.1 (OK)
pyflakes >=0.6.0  :  1.6.0 (OK)
pygments >=2.0    :  2.2.0 (OK)
pylint >=0.25     :  1.9.2 (OK)
qtconsole >=4.2.0 :  4.3.1 (OK)
rope >=0.9.4      :  0.10.7 (OK)
sphinx >=0.6.6    :  1.7.6 (OK)
sympy >=0.7.3     :  None (NOK)

[jitseniesen]

After mdtjan mentioned on gitter they had the same problem on Ubuntu, I had a look on my Linux Fedora computer. I see the same problem on a fresh environment created with conda create spyder, which installs Python 3.7.0, Qt 5.9.6 and PyQt 5.9.2. The problem disappears after conda install qt=5.9.5, which downgrades to Python to 3.6.6 (and Qt to 5.9.5, obviously) and leaves PyQt unchanged.

[CAM-Gerlach]

@jitseniesen I tested the maximize command on various panes of a number of configurations.

The upshot is that the one variable that caused this problem is going from Qt 5.9.4 to 5.9.5; Python version, platform, install method, pyopengl, and Spyder version all didn't make a difference in my testing.

The only changes between Fedora 28 configs that didn't work maximizing, and the one that did, were:

fongconfig:
2.13.0 -> 2.12.6
freetype:
2.9.1 -> 2.8
qt:
5.9.6 -> 5.9.5

and on Windows 8.1 x64, it was just the qt 5.9.5 -> 5.9.6 change.

Probably unrelated, but the Spyder About dialog and the bootstrap.py script (all versions tested) reports Qt 5.9.4 was installed even if 5.9.5 or 5.9.6 is the actual Qt version, e.g. as found by conda list qt, on both Fedora 28 and Windows 8.1.

Full platforms tested list:

WORKS:
Spyder 3.2.8 Miniconda Defaults
Python 3.6.5 x64 | Qt 5.9.4 | PyQt 5.9.2 | Fedora 28 x64

Spyder 3.3.1 Miniconda Defaults
Python 3.6.5 x64 | Qt 5.9.4 | PyQt 5.9.2 | Fedora 28 x64

Spyder 3.3.1 Miniconda Defaults
Python 3.6.5 x64 | Qt 5.9.5 | PyQt 5.9.2 | Fedora 28 x64

Spyder 3.3.1 (Github checkout of release commit)
Python 3.6.6 x64 | Qt 5.9.4 | PyQt 5.9.2 | Windows 8.1 x64

Spyder 3.3.1 (Github checkout of release commit)
Python 3.6.6 x64 | Qt 5.9.5 | PyQt 5.9.2 | Windows 8.1 x64

MAXIMIZE PROBLEM:
Spyder 3.2.8 Miniconda Defaults
Python 3.6.5 x64 | Qt 5.9.6 | PyQt 5.9.2 | Fedora 28 x64

Spyder 3.3.1 Miniconda Defaults
Python 3.6.5 x64 | Qt 5.9.6 | PyQt 5.9.2 | Fedora 28 x64

Spyder 3.2.8 Anaconda Defaults
Python 3.6.6 x64 | Qt 5.9.6 | PyQt 5.9.2 | Windows 8.1 x64

Spyder 3.3.1 Anaconda Defaults
Python 3.6.6 x64 | Qt 5.9.6 | PyQt 5.9.2 | Windows 8.1 x64

Spyder 3.3.1 (Github checkout of release commit)
Python 3.6.6 x64 | Qt 5.9.6 | PyQt 5.9.2 | Windows 8.1 x64

To note, conda install qt=5.9.5 on Fedora 28 worked when updating from qt 5.9.4, but when downgrading from 5.9.6 (and performing the same operations) Spyder wouldn't start and I got the following error:

Inconsistency detected by ld.so: ../elf/dl-tls.c: 481: _dl_allocate_tls_init: Assertion 'listp->slotinfo|cnt].gen <= GLidl_tls_generation]' failed!

However it is pretty clearly not related to Spyder or this issue.

[CAM-Gerlach]

Also, for the record I tested PyQt 5.6.0 | Qt 5.6.2 and it also works.

[ccordoba12]

Pinging @mingwandroid about this one. It looks like a Qt bug introduced in its latest release.

[CAM-Gerlach]

And no @mingwandroid I didn't screw up and use conda-forge this time, haha! I've made sure to stay away from that since you gave me that advice :)

[mlearnx]

Thank you guys for your prompt action. The problem is resolved by following the @jitseniesen suggestion, and the maximize pane works like a charm.

I have done: _conda install qt=5.9.5_:

The following screenshot shows the updated and downgraded packages:

[CAM-Gerlach]

The problem is resolved by following the @jitseniesen suggestion, and the maximize pane works like a charm.

Glad to hear it works for you, @mlearnx . Just to be clear, this is only a temporary and per-user workaround, and will not suffice for many use cases going forward if not addressed properly.

[mingwandroid]

Any pointers where to start looking at this @ccordoba12?

[mingwandroid]

For people using 5.9.6, a workaround for this is that after maximiizing the pane, go to the divider line and move it a pixel, the Window should then get maximized correctly.

[mingwandroid]

I believe this is the bug: https://bugreports.qt.io/browse/QTBUG-68939 and this is the fix: https://codereview.qt-project.org/#/c/233482/

[ccordoba12]

Thanks a lot Ray for helping us with this one!

[mingwandroid]

I built Qt locally with this change and can confirm it fixes this issue for me. I have a few loose ends with Qt to tie up (looking at adding QtCharts and a Designer plugin bug) before I release it though.

[mingwandroid]

No problem @ccordoba12, good to shake these bugs out.

[CAM-Gerlach]

Thanks so much @mingwandroid !

[ccordoba12]

Closing because this is not a Spyder problem. As Ray said, it should be fixed once new Qt packages are uploaded by Anaconda.