Finding QSettings keys from source code?

Question

I'm looking to change a number of QGIS settings with a python script. Whilst I can find references to some specific keys through various questions/answers on StackExchange, I can't find a method to actually look these up myself.

The question How do I access QGIS program settings programmatically? indicates that I need to go into the source code to look these up. However, I'm only a novice with this scripting stuff, and don't really know where to start or what to look for.

Can you provide a generalised set of steps for finding these keys in the source code?

• artwork21: Your question is broad, what specific setting are you interested in? See, docs.qgis.org/2.14/en/docs/pyqgis_developer_cookbook/…
• firefly-orange: @artwork21 Right now I'm interested in toggling "Auto Open Form". However, what I'm really after is a method for answering this question myself (if that makes sense). Then I won't have to post another question on SE the next time I want to find a key.

Answer 1

You can use the QSettings::allKeys() method by first importing it:

from PyQt4.QtCore import QSettings

---

Then

• To get a list of current keys:

  QSettings().allKeys()
  

• To print all keys individually (for readability):

  for keys in QSettings().allKeys():
   print keys
  

• To search for a specific key:

  for keys in QSettings().allKeys():
   if 'Qgis' in keys:
   print keys