FileView defines an abstract class that can be implemented
* to provide the filechooser with UI information for a File.
* Each L&F JFileChooserUI object implements this
* class to pass back the correct icons and type descriptions specific to
* that L&F. For example, the Microsoft Windows L&F returns the
* generic Windows icons for directories and generic files.
* Additionally, you may want to provide your own FileView to
* JFileChooser to return different icons or additional
* information using {@link javax.swing.JFileChooser#setFileView}.
*
*
*
* JFileChooser first looks to see if there is a user defined
* FileView, if there is, it gets type information from
* there first. If FileView returns null for
* any method, JFileChooser then uses the L&F specific
* view to get the information.
* So, for example, if you provide a FileView class that
* returns an Icon for JPG files, and returns null
* icons for all other files, the UI's FileView will provide
* default icons for all other files.
*
*
*
* For an example implementation of a simple file view, see
* yourJDK/demo/jfc/FileChooserDemo/ExampleFileView.java.
* For more information and examples see
* How to Use File Choosers,
* a section in The Java Tutorial.
*
* @see javax.swing.JFileChooser
*
* @author Jeff Dinkins
*
*/
public abstract class FileView {
/**
* The name of the file. Normally this would be simply
* f.getName().
*/
public String getName(File f) {
return null;
};
/**
* A human readable description of the file. For example,
* a file named jag.jpg might have a description that read:
* "A JPEG image file of James Gosling's face".
*/
public String getDescription(File f) {
return null;
}
/**
* A human readable description of the type of the file. For
* example, a jpg file might have a type description of:
* "A JPEG Compressed Image File"
*/
public String getTypeDescription(File f) {
return null;
}
/**
* The icon that represents this file in the JFileChooser.
*/
public Icon getIcon(File f) {
return null;
}
/**
* Whether the directory is traversable or not. This might be
* useful, for example, if you want a directory to represent
* a compound document and don't want the user to descend into it.
*/
public Boolean isTraversable(File f) {
return null;
}
}