Add SmartPad support

[TheLastMillennial]

Added new option to Key Bindings under the General Settings to select 'SmartPad'. This will allow a user to connect their calculator (running the SmartPad app) to their computer, and control the CEmu Keypad with it.

Testing needed on Windows:
Pressing a key that contains the combination Alt+Ctrl+Win+Shift on Windows 10 will launch the Office application (or a webpage asking you to download Office). I have already disabled this via a Registry tweak so I cannot test. I need to be sure this nuisance won't appear on other's machines.

[jacobly0]

Works on linux (with xkb_options srvrkeys:none).

[adriweb]

So hm, on macOS, some keys don't work, and most keys that work don't get released (in fact, only Enter seems to behave fine)

Keys that don't work: 2nd, mode, del, arrows, alpha, Xtn, stats, résol, ,, (, )
actually nevermind it's rather random and most of the time it doesn't work as expected.

[TheLastMillennial]

[enter] is the only key that TI implemented sensibly into Smartpad. By default, [enter] on the calculator simply maps to [enter] on a keyboard. That's probably why it works reliably.

The rest of the keys utilize some combination of [meta] and the [ctrl], [alt], or [shift] keys.

Maybe the issue lies with global keyboard shortcuts? I read you can turn them off on Mac by doing:

1. Open System Preferences
2. Click Keyboard
3. Click Shortcuts pill (third one from the left)
4. Deselect all checked shortcuts

[adriweb]

Eh well, it's not nice to have the user change their settings, so I won't do that especially because I use some :P
Anyway SV handles it just fine so at least we know there's a way.

[TheLastMillennial]

I'm not sure what SV is?
So, is this a problem that still needs to be addressed?

[adriweb]

SmartView CE, I mean.

[TheLastMillennial]

This may not be the best solution, but I found a way to disable all shortcuts: https://stackoverflow.com/questions/5311459/disable-keyboard-shortcut

[adriweb]

So hm, should we merge this addign a warning that it may only work correctly under some circumstances?

[TheLastMillennial]

bump I think this was merged? Can we close the PR?

[adriweb]

How does it behave on Windows?

[TheLastMillennial]

EDIT: See #439 (comment) instead!

Original comment:
It works totally fine unless the user has Microsoft Office installed. SmartPad will sometimes trigger the global shortcut (ctrl+alt+shift+win) to open the Office application.
You can disable this either by installing software to disable all office shortcuts, or applying a registry tweak to just disable the Office shortcut.

Perhaps this PR should look into disabling the Office shortcut while CEmu is open?

[adriweb]

Well, considering it has global conflicts on both Windows and macOS, maybe either:

• make the code available only on Linux
• Have a confirm popup warning of potential issues, before it gets actually enabled when the win/mac user tries to enable it.

[calc84maniac]

Looking at the code in this PR, it appears that the Office shortcut is only used with function keys, so it wouldn't be necessary to use the full OfficeKeyFix. The real question is whether the registry tweak applies instantly without needing to restart explorer.exe, in which case it might be a viable option.

Edit: Actually, looking at OfficeKeyFix, I wonder if registering hotkeys with the function keys we're using would prevent the office shortcut from being triggered as well.

[TheLastMillennial]

I just now retested this and the behavior seems to have changed. Office no longer opens whenever ctrl+alt+shift+win+anykey is pressed. It only opens when a valid shortcut is pressed (i.e. ctrl+alt+shift+win+d for onedrive). I was unable to get Office to open anymore using SmartPad so I don't think this is any issue anymore on Windows.

[adriweb]

Probably depends on the Windows/office version then I guess. In any case, still probably warrants a warning shown to the user.

[adriweb]

warning shown to the user

Can anyone take care of this before we release v2.0?

[adriweb]

Done via cc5c270 + c8ab958