Combobox with issues using dark theme - QDarkStyle problem

Issue Report Checklist

• 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
• Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

Combo boxes are showing a white line in top and bottom when opened, and it includes a checkbox inside the combobox when using DarkStyle.

That is a problem with QDarkStyle, I need a confirmation of this bug reported in: https://github.com/ColinDuquesnoy/QDarkStyleSheet/issues/132

What steps reproduce the problem?

1. Open the Spyder IDE
2. Go to Help tab
3. Open Combobox of Console
4. Or preferences/Appearence theme combobox

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

A normal combobox as in Fonts Menu.

Versions

• Spyder version: 4.0.0.dev
• Python version: 3.6.8
• Qt version: 5.6.2
• PyQt version: 5.6
• Operating System name/version: Linux, Ubuntu 18.04

Also, providing this versions as you do with dependencies should very nice to make the reporting easy. Or using help-dev below.

helpdev-info.txt

Dependencies

pygments >=2.0 : 2.3.1 (OK) qdarkstyle >=2.6.4: 2.6.6 (OK) sphinx >=0.6.6 : 2.0.1 (OK) psutil >=0.3 : 5.6.1 (OK) pyls >=0.19.0 : 0.26.1 (OK) nbconvert >=4.0 : 5.4.1 (OK) pandas >=0.13.1 : None (NOK) numpy >=1.7 : 1.16.3 (OK) sympy >=0.7.3 : None (NOK) cython >=0.21 : None (NOK) qtconsole >=4.2.0 : 4.4.3 (OK) IPython >=4.0 : 7.4.0 (OK) matplotlib >=2.0.0: None (NOK) pylint >=0.25 : 2.3.1 (OK)

[ccordoba12]

@dpizetta, thanks for reporting. I noticed this problem too. Is there something we can do about it in Spyder?

[ccordoba12]

This was fixed in QDarkstyle 2.6.7