`Input.is_action_just_pressed` flickers when action is tied to an input axis (joystick direction)

[mieldepoche]

Godot version

4.2.dev5

System information

linux, wired switch pro controller

Issue description

may be related to #81170 (as before that, my axes were getting stuck, but since then I get this bug). (although I didn't bisect or anything, I just remember that)

I have an action tied to an input axis (a joystick direction).
This happens as I move my joystick in the direction of the action:

simplescreenrecorder-2023-09-20_13.57.30.webm

(red circle is deadzone)

Steps to reproduce

1. assign a controller axis to an action
2. print Input.is_action_just_pressed("your_action") in _process
3. wiggle your stick

Minimal reproduction project

axis_jittering.zip

[mieldepoche]

it is counting the amount of times that a certain action is pressed at the same time

not 100% sure but I think that if you assign two keys to an action (say, the left key on your keyboard and the left dpad of a controller), pressing them together can only be tracked correctly that way.

[ErezShahaf]

it is counting the amount of times that a certain action is pressed at the same time

not 100% sure but I think that if you assign two keys to an action (say, the left key on your keyboard and the left dpad of a controller), pressing them together can only be tracked correctly that way.

In that case I can't understand intentions of the developers:

// If axis is already pressed, don't increase the pressed counter.

Then what is the point of having this counter anyway? It won't count the amount of concurrent presses, and line 731 will be meaningless as well - as the maximum is 1. I can see how the bug lies in there and would love to fix it, but I'll wait to hear from others what's the idea of that counter because there may be something that I'm missing.

[Sauermann]

Then what is the point of having this counter anyway?

The counter tracks how many different keys are pressed, that are bound to the same Action.

// If axis is already pressed, don't increase the pressed counter.

That is to make sure that input from a single Axis can affect the counter only once.

The jittering likely got introduced in this PR: #80859 (comment) CC @KoBeWi.

[ErezShahaf]

Then what is the point of having this counter anyway?

The counter tracks how many different keys are pressed, that are bound to the same Action.

// If axis is already pressed, don't increase the pressed counter.

That is to make sure that input from a single Axis can affect the counter only once.

The jittering likely got introduced in this PR: #80859 (comment) CC @KoBeWi.

Makes sense, I'll look into it.

[KoBeWi]

That is to make sure that input from a single Axis can affect the counter only once.

To expand on this, an axis can press an action multiple times in a row without releasing it. This is because axis events come with a strength and they count as pressed when the strength is above deadzone. You can get multiple events with strength above deadzone.
This condition checks only axis input, as buttons and keys are unaffected.

[ErezShahaf]

It ended up being a fairly simple issue, the assignments of pressed_frame were in the wrong scope; it works perfectly now.
Btw, unrelated question - when I tried to debug the issue from source whenever I open the test project of miel it would detach the debugger. Is there a way to solve it?

[KoBeWi]

Use --path and provide path to the project. You need to open it without starting project manager, because it's a separate process.