Allow controlling the camera with the keyboard

[ArturKovacs]

Closes #159

With this, the configuration accepts the following bindings

[bindings]
zoom_in = ["x"]
zoom_out = ["z"]
pan_left = ["j"]
pan_right = ["l"]
pan_up = ["i"]
pan_down = ["k"]

[ArturKovacs]

@akimdi could you check if this does what you needed? You'd need to have rust installed to be able to build and run this so if you can't check this that's completely fine, I can just merge this as-is.

[akimdi]

@ArturKovacs Everything works for me. Thank you. Can I remap the keys?

[ArturKovacs]

Can I remap the keys?

Abolutely, that should be possible :) The guide on the website might help with that: https://arturkovacs.github.io/emulsion-website/bindings.html

Report back if something doesn't work.

[ArturKovacs]

@akimdi Could you remap the keys the way you wanted?

[akimdi]

@ArturKovacs Yes, but I found some bugs during testing.

1. It hangs a little for a few seconds when I delete files one by one and there are no files left in the folder and then throws this error

Error occurred while loading image: Could not got current file descriptor
Error occurred while loading image: Could not got current file descriptor
Error while updating directory Error(DirError(Other("No such file or directory (os error 2)")), State { next_error: None, backtrace: InternalBacktrace { backtrace: None } })

2. Not everywhere can create .Trash-1000 folder. For example, cannot do it in my ram folder I suspect that this is due to access rights. Other apps can do this.

Error while moving file '"1.jpg"' to trash: Remove { code: Some(1) }

3. Can't assign -
   for example

[bindings]
zoom_in = ["+"]
zoom_out = ["-"]

Isn't working for me.

You are making an amazing product. Thanks for everything. Happy New Year 🎄

[akimdi]

This is what my config file looks like now
https://github.com/akimdi/emulsion/blob/master/cfg.toml

[ArturKovacs]

1. I opened #166
2. I added this information to #163
3. I opened Input bindings is missing describing that 'subtract' must be used instead of '-' emulsion-website#6

You are making an amazing product. Thanks for everything. Happy New Year

Thank you so much! It makes me glad to know that you enjoy this program. Happy New Year to you too! 🎆

[ArturKovacs]

On top of the missing documentation, there was a bug in the code that prevented the alphanumeric - key from triggering actions bound to subtract

[akimdi]

key from triggering actions bound to subtract

@ArturKovacs Thank you.

[ArturKovacs]

You're welcome