Allow setting the value of data-lake variables with joystick buttons

[rafaellehmkuhl]

This works for both boolean and floating buttons, so one can use trigger/bumper buttons as well.

Fix #1657

[ES-Alexander]

I haven't had a chance to test yet, but if this triggers on both press and release of buttons, it could be relevant to #1475 :-)

[rafaellehmkuhl]

I haven't had a chance to test yet, but if this triggers on both press and release of buttons, it could be relevant to #1475 :-)

Totally doable with this new architecture. The one reading the variable has full control on the implementation.

[ArturoManzoli]

Feature is awesome and the code looks fine.

• I was able to assign a button to a variable and its pressing was reflected on the data-lake variable value, as you can see on the spikes (graphic on the left).

• The association was also available to the axis, though, I wasn't able to see the value from an analog axis reflected on the variable.
  I successfully assigned the same variable to the axis 2, but moving it generated only zeros. (The graphic sliding on its X axis is axis 2 adding zeros on the data-lake variable.)

Should the association be available to the analog axis too?

Screenshare.-.2025-02-05.11_17_56.AM.mp4

[rafaellehmkuhl]

• I was able to assign a button to a variable and its pressing was reflected on the data-lake variable value, as you can see on the spikes (graphic on the left).

On which data-lake variable? If it's the cockpit-memory-usage or the application-fps, it is normal, as the data-lake uses system resources, as expected.

• The association was also available to the axis, though, I wasn't able to see the value from an analog axis reflected on the variable.
  I successfully assigned the same variable to the axis 2, but moving it generated only zeros. (The graphic sliding on its X axis is axis 2 adding zeros on the data-lake variable.)

Should the association be available to the analog axis too?

No, this PR is meant only to add the feature to buttons for now, but a new one extending it to axis is on progress.

[ES-Alexander]

I haven't had a chance to test yet, but if this triggers on both press and release of buttons, it could be relevant to #1475 :-)

Totally doable with this new architecture. The one reading the variable has full control on the implementation.

Nice!
I expect #1539 could make this more practical to users, along with options 3/4 and the subsequent comments in #1538.

[rafaellehmkuhl]

I haven't had a chance to test yet, but if this triggers on both press and release of buttons, it could be relevant to #1475 :-)

Totally doable with this new architecture. The one reading the variable has full control on the implementation.

Nice! I expect #1539 could make this more practical to users, along with options 3/4 and the subsequent comments in #1538.

I actually have this functionality ready in another branch. I'm just waiting for this PR and another one (that will open after this one) to open the one that adds triggers.

I didn't want to put everything in the same to make the review easier/faster and also to make all changes clear in the changelog.

[ArturoManzoli]

Since you said that there is another PR coming very soon that binds axes to data-lake variables, it's ok to keep this function enabled on this merge.