[Bug] Cancelling out of "Open Image" file explorer makes the program unresponsive

[KyleKing54]

Describe the bug
When you select the File > Open option and launch a file explorer and then close the file explorer without selecting an image, the program window becomes unresponsive.

To Reproduce
Steps to reproduce the behavior:

1. Go to File
2. Click on Open
3. Click "Cancel" on the file explorer window
4. Program window is now unresponsive to inputs.

Expected behavior
The program should allow you to attempt to open a file again instead of freezing, or an error popup telling you no file was selected.

Desktop (please complete the following information):

• OS: MacOS
• Version: 10.13.6

[jody]

All currently open windows also become unresponsive (except to minimize/restore actions).
Testing with Java versions 9 and 16 under macOS 11.6 produced the same results.

[lonespartan12]

checkpoint: We think the listener is not looking for the possible file explorer exit code and returning to where the file explorer was called from.

[KaizenPool]

I found the same problem as well. I clicked on the file menu option -> opened an image from the repository -> a new window opened with the picture, and I could quit the window. This makes me think that it is an interaction with the MAC OS rather than the program itself. In JMenu there is no code that shows the connection between the Finder Window and the application program.

[Li-es]

I would like to be assigned to this issue.