Opening a file when another instance is already is running sometimes fails

[swiftgeek]

Opening a file when another instance is already is running sometimes fails

[dail8859]

What version of Linux? Is the AppImage or Flatpack?

[ErickWei]

I have also encountered the same problem under MAC. When NN is already open and minimized, double-clicking another file will not wake up NN. The NN window needs to be restored manually, then the file will be imported by NN.

Kapture.2024-04-07.at.12.36.39.webm

[swiftgeek]

Archlinux, installed from AUR

@ErickWei that sounds like exact opposite to my problem

[ErickWei]

Ohh it could be another issue sorry

Archlinux, installed from AUR

@ErickWei that sounds like exact opposite to my problem

[swiftgeek]

Actually if I minimize like in @ErickWei test case it feels like it's failing a lot less

Normally I'm just switching virtual desktops on KDE

[dail8859]

Archlinux, installed from AUR

I'm not sure who maintains that repository but I'm assuming this is a general Linux issue and not specifical to Archlinux+AUR.

I have also encountered the same problem under MAC.

There's a few different components to all this working. And it works different depending on OS.

The first part is just forcing the window to be maximized and forcing it to the front of everything else. Most operating systems deem this as being malicious and make it difficult to do this.

The MainWindow::bringWindowToForeground() method probably needs more specific implementations for Linux and Mac. I've had to implement one for Windows just because Qt doesn't provide a good cross-platform way to do it that I've found.

The other piece is sending the information of the file to open to the other instance. It relies on the 3rd party library to implement this and I know there were issues on Qt6.6+. Mac also works slightly differently when telling another instance to open a file. So I'm not completely sure why this would be failing.

I did just recently add some extra debugging info into the application to hopefully help troubleshoot but this will probably be difficult since it seems to be so OS specific.