Print all keyboard shortcuts to cheatset

[timmie]

Spyder has may good shortcuts. But they are well hidden in the preferences dialogue

Tools --> Preferences --> Keyboard shortcuts?

Solution:
add a print (to PDF) function to the keyboard settings so that users can have these open on a separate file while learning the programme.

References:
https://code.google.com/archive/p/spyderlib/issues/578
#578

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

Please provide any additional information below

Versions and main components

• Spyder Version: 3.0.dev
• Python Version: 2.7
• Operating system: linux, ubuntu mint 17.3

Dependencies

jedi >=0.8.1 : 0.9.0 (OK)
matplotlib >=1.0 : 1.5.1 (OK)
nbconvert >=4.0 : 4.0.0 (OK)
numpy >=1.7 : 1.10.4 (OK)
pandas >=0.13.1 : 0.17.1 (OK)
pep8 >=0.6 : 1.7.0 (OK)
psutil >=0.3 : 3.3.0 (OK)
pyflakes >=0.5.0 : 1.0.0 (OK)
pygments >=2.0 : 2.0.2 (OK)
qtconsole >=4.2.0: 4.2.1 (OK)
rope >=0.9.4 : 0.9.4 (OK)
sphinx >=0.6.6 : 1.3.1 (OK)
sympy >=0.7.3 : 0.7.6.1 (OK)

[goanpeca]

Would a shortcut to display a summary of shortcuts help? Like Ubuntu when leaving the "windows" key
pressed.

[timmie]

@goanpeca This would be perfect!

[goanpeca]

@rlaverde

https://github.com/spyder-ide/spyder/blob/master/spyderlib/plugins/shortcuts.py
https://github.com/spyder-ide/spyder/blob/master/spyderlib/widgets/arraybuilder.py

[rlaverde]

I'm working in this issue, this is the current state, any opinions? improvements? Which shortcut will display the dialog?

[ccordoba12]

@rlaverde, this is really nice!

Just a couple of comments:

1. The Pylint and Profiler sections look too big, but other than that, I like it very much!
2. Please test this in other platforms to see how it looks.
3. This list should be printable somehow. I mean, we could add a Print button to the dialog and a printable representation associated with it. @goanpeca, what do you think?

[goanpeca]

Hi @rlaverde, thanks for working on this :-)

@ccordoba12 on your comments:

1. Yes, hmmm maybe if the column rows are smaller than the max allowed, we could add a stretch (layout.addStretch), so that they line up and dont waste space
2. I can see how it looks on windows and OSX as soon as @rlaverde has a PR
3. That is a great idea :-p, but Probably we would need to reformat the content?, maybe for another PR cause it might need some extra tweaking?

[timmie]

@ccordoba12 as initial requester I would be happy with the quick display. Maybe saving as image file. But well formatted printing is not needed if let's say WIN+F1 brings this panel up very quickly.

[cybervigilante]

What I could use, but don't see in the displayed shortcuts, is Insert Cell Below, which I constantly use to experiment with things, get info, or correct an error in the cell above

[ccordoba12]

Cells are simply created by comments of the form #%%, so I don't think that needs a shortcut.