File and Class Choosers
To let a user choose a file, directory or multiple files, use the
FileChooser.chooseFiles() method. This method has multiple overloads. The best method to use is the one which returns void and takes a callback receiving the list of selected files as a parameter. This is the only overload which will display a native file open dialog on macOS.
FileChooserDescriptor class allows you to control which files can be selected. The constructor parameters specify whether files and/or directories can be selected, and whether multiple selection is allowed (see FileChooserDescriptorFactory for common variants).
For more fine-grained control over the allowed selection, you can overload the
isFileSelectable() method. You can also customize the presentation of files by overriding
getComment() methods. Note that the native macOS file chooser does not support most of the customizations, so if you rely on them, you need to use an overload of
chooseFiles() which displays the standard IntelliJ Platform dialog.
A very common way of using file choosers is to use a text field for entering the path with an ellipsis button ("...") for showing the file chooser. To create such a control, use the
TextFieldWithBrowseButton component and call the
addBrowseFolderListener() method on it to set up the file chooser. As an added bonus, this will enable filename completion when entering paths in the text box.
An alternative UI for selecting files, which works best when the most common way of selecting a file is by typing its name, is available through the
The dialog shown by this API has two tabs:
One shows the project structure
Another shows a list of files similar to the one used by the
To show the dialog, call
showDialog() on the chooser returned from
createFileChooser(), and then call
getSelectedFile to retrieve the user's selection.
Class and Package Choosers
If you want to offer the user a possibility to select a Java class, you can use the
TreeClassChooserFactory class. Its different methods allow you to specify the scope from which the classes are taken, to restrict the choice to descendants of a specific class or implementations of an interface, and to include or exclude inner classes from the list.
For choosing a Java package, you can use the