FileChooser and Slow Operation in EDT

IntelliJ Platform
1

Hi, I have a JButton that triggers a file selection by invoking a com.intellij.openapi.fileChooser.FileChooser.
Basically, it looks like

myButton.addActionListener(al -> {
    FileChooserDescriptor fileChooserDescriptor = new FileChooserDescriptor(...);
    VirtualFile virtualFile = FileChooser.chooseFile(fileChooserDescriptor, null, null); // <- error here
    ...
});

This triggers a Slow operations are prohibited on EDT exception.

If I move FileChooser.chooseFile outside from the EDT, it says I need to run in EDT…

A workaround is to replace com.intellij.openapi.fileChooser.FileChooser by a good old javax.swing.JFileChooser, but its UI is ugly.

Do you know how to integrate a FileChooser? Thanks.

1 Like
2

@jonathanlermitage.1 have you succeeded on that one?

3

Unfortunately, no :disappointed_face:.
BTW, users may see these warnings when the Internal mode is activated. If so, they can hide them by setting ide.slow.operations.assertion=false in IDE’s properties.

4

Sorry folks, there is no solution unfortunately yet. But this diagnostic is not shown to users in releases, please do not worry, only during development and internal mode.

5

It looks so the slow operations may be bypassed if the not null initial value for FileChoser is provided. For me the following approach works

VirtualFile initLocation = defaultLocation; // should not be null
VirtualFile virtualFile = FileChooser.chooseFile(fileChooserDescriptor, null, defaultLocation);