PolymorphicJListpublic class PolymorphicJList extends JList
| Fields Summary |
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| static Color | listForeground | | static Color | listBackground | | static Color | listSelectionForeground | | static Color | listSelectionBackground | | ImageIcon | fileIcon | | ImageIcon | textFileIcon | | ImageIcon | directoryIcon | | ImageIcon | imageFileIcon | | ImageIcon | pngFileIcon | | ImageIcon | gifFileIcon | | ImageIcon | jpegFileIcon | | JComponent | fileCellPrototype | | JComponent | textCellPrototype | | JComponent | imageCellPrototype | | JComponent | directoryCellPrototype | | JLabel | fileNameLabel | | JLabel | textNameLabel | | JLabel | directoryNameLabel | | JLabel | imageNameLabel | | JLabel | fileSizeLabel | | JLabel | textSizeLabel | | JLabel | textWordCountLabel | | JLabel | directoryCountLabel | | JLabel | imageSizeLabel | | JLabel | imageIconLabel |
| Constructors Summary |
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public PolymorphicJList(File dir)
super();
buildPrototypeCells();
setCellRenderer (new PolyRenderer());
setModel (new DefaultListModel());
if (! dir.isDirectory())
dir = new File (dir.getParent());
buildModelFromDir (dir);
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| Methods Summary |
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| private void | addWithGridBag(java.awt.Component comp, java.awt.Container cont, int x, int y, int width, int height, int anchor, int fill, int weightx, int weighty)
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = x;
gbc.gridy = y;
gbc.gridwidth = width;
gbc.gridheight = height;
gbc.anchor = anchor;
gbc.fill = fill;
gbc.weightx = weightx;
gbc.weighty = weighty;
cont.add (comp, gbc);
| | protected void | buildIcons()
String SEP = System.getProperty ("file.separator");
fileIcon = new ImageIcon ("images" + SEP + "generic.gif");
textFileIcon = new ImageIcon ("images" + SEP + "text.gif");
directoryIcon = new ImageIcon ("images" + SEP + "folder.gif");
imageFileIcon = new ImageIcon ("images" + SEP + "image.gif");
pngFileIcon = new ImageIcon ("images" + SEP + "png.gif");
gifFileIcon = new ImageIcon ("images" + SEP + "gif.gif");
jpegFileIcon = new ImageIcon ("images" + SEP + "jpeg.gif");
| | protected void | buildModelFromDir(java.io.File dir)
File[] files = dir.listFiles();
DefaultListModel mod = (DefaultListModel) getModel();
for (int i=0; i<files.length; i++) {
if (isTextFile (files[i]))
mod.addElement (new TextFileItem (files[i]));
else if (isImageFile (files [i]))
mod.addElement (new ImageFileItem (files[i]));
else if (files[i].isDirectory())
mod.addElement (new DirectoryItem (files[i]));
else
mod.addElement (new FileItem (files[i]));
}
| | protected void | buildPrototypeCells()
buildIcons();
fileCellPrototype = new JPanel();
fileCellPrototype.setLayout (new GridBagLayout());
addWithGridBag (new JLabel(fileIcon), fileCellPrototype,
0, 0, 1, 2,
GridBagConstraints.WEST, GridBagConstraints.BOTH, 0, 0);
fileNameLabel = new JLabel();
Font defaultLabelFont = fileNameLabel.getFont();
Font nameFont = defaultLabelFont.deriveFont (Font.BOLD,
defaultLabelFont.getSize()+2);
fileNameLabel.setFont (nameFont);
addWithGridBag (fileNameLabel, fileCellPrototype,
1, 0, 1, 1,
GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, 1, 0);
fileSizeLabel = new JLabel();
addWithGridBag (fileSizeLabel, fileCellPrototype,
1, 1, 1, 1,
GridBagConstraints.SOUTH, GridBagConstraints.HORIZONTAL, 1, 0);
opacify (fileCellPrototype);
// text file
textCellPrototype = new JPanel();
textCellPrototype.setLayout (new GridBagLayout());
addWithGridBag (new JLabel(textFileIcon), textCellPrototype,
0, 0, 1, 2,
GridBagConstraints.WEST, GridBagConstraints.BOTH, 0, 0);
textNameLabel = new JLabel();
textNameLabel.setFont (nameFont);
addWithGridBag (textNameLabel, textCellPrototype,
1, 0, 2, 1,
GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, 1, 0);
textSizeLabel = new JLabel();
textWordCountLabel = new JLabel();
addWithGridBag (textSizeLabel, textCellPrototype,
1, 1, 1, 1,
GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, 0, 0);
addWithGridBag (textWordCountLabel, textCellPrototype,
2, 1, 1, 1,
GridBagConstraints.SOUTH, GridBagConstraints.HORIZONTAL, 1, 0);
opacify (textCellPrototype);
// directory
directoryCellPrototype = new JPanel();
directoryCellPrototype.setLayout (new GridBagLayout());
addWithGridBag (new JLabel(directoryIcon), directoryCellPrototype,
0, 0, 1, 2,
GridBagConstraints.WEST, GridBagConstraints.BOTH, 0, 0);
directoryNameLabel = new JLabel();
directoryNameLabel.setFont (nameFont);
addWithGridBag (directoryNameLabel, directoryCellPrototype,
1, 0, 1, 1,
GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, 1, 0);
directoryCountLabel = new JLabel();
addWithGridBag (directoryCountLabel, directoryCellPrototype,
1, 1, 1, 1,
GridBagConstraints.SOUTH, GridBagConstraints.HORIZONTAL, 1, 0);
opacify (directoryCellPrototype);
// image
imageCellPrototype = new JPanel();
imageCellPrototype.setLayout (new GridBagLayout());
addWithGridBag (new JLabel(imageFileIcon), imageCellPrototype,
0, 0, 1, 2,
GridBagConstraints.WEST, GridBagConstraints.BOTH, 0, 0);
imageNameLabel = new JLabel();
imageNameLabel.setFont (nameFont);
addWithGridBag (imageNameLabel, imageCellPrototype,
1, 0, 1, 1,
GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, 1, 0);
imageSizeLabel = new JLabel();
addWithGridBag (imageSizeLabel, imageCellPrototype,
1, 1, 1, 1,
GridBagConstraints.SOUTH, GridBagConstraints.HORIZONTAL, 1, 0);
imageIconLabel = new JLabel();
addWithGridBag (imageIconLabel, imageCellPrototype,
2, 0, 1, 2,
GridBagConstraints.EAST, GridBagConstraints.VERTICAL, 0, 0);
opacify (imageCellPrototype);
| | protected boolean | isImageFile(java.io.File f)
if (f.isDirectory())
return false;
String name = f.getName();
return name.endsWith (".gif") || name.endsWith (".GIF") ||
name.endsWith (".jpg") || name.endsWith (".JPG") ||
name.endsWith (".jpeg") || name.endsWith (".JPEG") ||
name.endsWith (".bmp") || name.endsWith (".BMP") ||
name.endsWith (".png") || name.endsWith (".PNG");
| | protected boolean | isTextFile(java.io.File f)
if (f.isDirectory())
return false;
String name = f.getName();
return name.endsWith (".txt") || name.endsWith (".html") ||
name.endsWith (".xml") || name.endsWith (".xhtml") ||
name.endsWith (".java") || name.endsWith (".c") ||
name.endsWith (".cpp") || name.endsWith (".c++") ||
name.endsWith (".m") || name.endsWith (".h");
| | public static void | main(java.lang.String[] args)
File dir = new File (".");
if (args.length > 0)
dir = new File (args[0]);
JList list = new PolymorphicJList (dir);
JScrollPane pain =
new JScrollPane (list,
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
JFrame frame = new JFrame ("PolymorphicJList");
frame.getContentPane().add (pain);
frame.pack();
frame.setVisible(true);
| | private void | opacify(java.awt.Container prototype)
Component[] comps = prototype.getComponents();
for (int i=0; i<comps.length; i++) {
if (comps[i] instanceof JComponent)
((JComponent)comps[i]).setOpaque(true);
}
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