How to support presentation remote that sends weird keys and set custom key bindings

[VorpalBlade]

Is your feature request related to a problem? Please describe.
I have a combined presentation remote / touch screen pen that was included with my computer. It sends (according to evtest on Linux) Alt-F20 and Alt-F19 for "forward" and "back" respectively. I cannot find a way to support this in pympress other than rebinding at the OS level using something like AutoKey.

Describe the solution you'd like
It would be nice to have support for custom key bindings in pympress, with multiple bindings for the same action (i.e. allow both right arrow and Alt-F20 to go forward). Personally I would be okay with editing a config file for this, I don't need a GUI to configure it.

Describe alternatives you've considered
Currently I'm using a pair of AutoKey scripts to send a right arrow and left arrow when Alt-F20/Alt-F19 are detected. This has multiple downsides:

• There is a noticable delay of maybe 1-2 tenths of a second compared to the output of evtest.
• It is Linux and X11 specific. Any user of Wayland or on another OS could not use this but would need to find specific solutions to their platforms.
• Solutions like AutoKey on Linux with X11 or AutoHotKey on Windows (and got knows what on Mac OS) require a needlessly high level of technical knowledge.

Additional context
The presentation remote is a Lenovo Pen Pro, and it was included with a Lenovo ThinkPad P15 Gen1.

[Cimbali]

I cannot find a way to support this in pympress […] It would be nice to have support for custom key bindings in pympress, with multiple bindings for the same action (i.e. allow both right arrow and Alt-F20 to go forward). Personally I would be okay with editing a config file for this […]

Your exact wishes have already come true! You can edit the config file directly. Its actual location should be displayed in the Help > About dialog, and should be %APPDATA%/pympress.ini on Windows and ~/.config/pympress on Linux.

For previous / next pages, the shortcuts you want to extend are next-page and prev-page, which should be the 2 first ones:

pympress/pympress/share/defaults.conf

Lines 177 to 179 in 3696763

	[shortcuts]
	next-page = Right Down Page_Down space
	prev-page = Left Up Page_Up

Gtk seems to know about F19 and F20, so the syntax should be <alt>F19 and <alt>F20 respectively:

[shortcuts]
next-page = Right Down Page_Down space <alt>F20
prev-page = Left Up Page_Up <alt>F19

[VorpalBlade]

Nice! I was looking in the readme on github and found nothing about editable key bindings. Maybe this bug is really about more obvious documentation in that case? I see now that there is a link to configuration file documentation (sorry about missing this). But it would have helped lazy or stressed people to have a mention of key bindings directly in the readme with a pointer to the config file.

[Cimbali]

Yeah documentation is improvable definitely. Especially making features more discoverable is not very easy. The shortcuts configurability is now mentioned in the README (since 9a5fb29).