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Gdx.input.isKeyPressed(ANY_KEY) broken (Linux)

See original GitHub issue

After dragging the application window, the Gdx.input.isKeyPressed() method always returns false when Input.Keys.ANY_KEY is passed as parameter.

Issue details

I’m not familiar with the libgdx codebase enough, but I think the pressedKeys value stops being updated at a certain point for whatever reason. This is also a platform specfic issue. I tested the same program on Windows 7 and it works as expected.

Reproduction steps/code

SSCCE That demostrates the issue..

Clone the repository linked above.
Run the desktop launcher.
Press left, right, up, down, and space keys to verify that the image moves.
Drag the window either with your mouse or a key combination.
Repeat step 3.

Expected behaviour: At step 5 the program behaves like in step 3 with key presses moving the image inside the application window.

Observed behaviour: At step 5, the program keeps running normally, but Gdx.input.isKeyPressed(Input.Keys.ANY_KEY) always returns false even though input is still correctly processed.

Version of LibGDX and/or relevant dependencies

libgdx 1.9.8

Environment

OS: Linux Kernel: x86_64 Linux 4.14.15-1-ARCH WM: i3wm CPU: Intel Core i7-5600U @ 4x 3.2GHz GPU: Mesa DRI Intel® HD Graphics 5500 (Broadwell GT2)

Java implementation

openjdk version “1.8.0_162” OpenJDK Runtime Environment (build 1.8.0_162-b12) OpenJDK 64-Bit Server VM (build 25.162-b12, mixed mode)

Affected platforms

Android
iOS (robovm)
iOS (MOE)
HTML/GWT
Windows
Linux
MacOS

[EDIT]

Added java implementation information (15 April 2018)

Issue Analytics

State:
Created 6 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

crykncommented, Nov 20, 2020

I think we can close this issue if the bug doesn’t happen with LWJGL 3. LWJGL 2 itself is no longer actively developed since 4 years ago, so legacy projects should consider migrating over to our LWJGL 3 backend anyway.

1reaction

yuripourrecommented, Apr 6, 2018

@nhatzHK thank you for your information about JVM version.

I may be wrong but my guess is that the (awt) window is losing focus after move event, and messing with input listeners, I have to take a deeper look to understand what is happening.

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