/**
* Class constructor alloowing specification of the heading text.
*
* @param properties the Properties object containing the initial values of the extensions list
* and the path to be displayed. This object is updated tin response to root changes,
* extension changes, and file selections. If any property is missing, a suitable one is
* supplied by default.
* @param heading the text to appear in the heading of the JPanel.
* @param background the background color or null if the default is to be used.
*/
public SourcePanel(ApplicationProperties properties, String heading, Color background) {
super();
this.properties = properties;
if (background == null) this.background = Color.getHSBColor(0.58f, 0.17f, 0.95f);
else this.background = background;
// Make the file filter
filter = new GeneralFileFilter();
String extensions = properties.getProperty("extensions");
if (extensions != null) filter.setExtensions(extensions);
else {
filter.addExtension(".dcm");
properties.setProperty("extensions", filter.getExtensionString());
}
// Get the starting directory path from the properties.
// If it is missing, start in the directory containing the program.
String currentDirectoryPath = properties.getProperty("directory");
if (currentDirectoryPath == null) currentDirectoryPath = System.getProperty("user.dir");
// Create the UI components
this.setLayout(new BorderLayout());
directoryPane = new DirectoryPane(filter, currentDirectoryPath);
directoryPane.addFileListener(this);
headerPanel = new HeaderPanel(heading);
footerPanel = new FooterPanel();
this.add(headerPanel, BorderLayout.NORTH);
this.add(directoryPane, BorderLayout.CENTER);
this.add(footerPanel, BorderLayout.SOUTH);
}