I'm writing a GUI in Swing where I want to do a file chooser that is in the main window, looking something like the image below:
while there seem to be quite a few tutorials on how to write a popup file chooser, i don't see much information on how this type of chooser might be accomplished in swing.
also sorry if this has been asked before, i did a good bit of searching around and wan't able to find anything else..
JFileChooser actually extends JComponent, so you can use like any other component. Here is an example with two in-pane file choosers:
public class TestInPaneChoosers {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
buildFrame();
}
});
}
private static void buildFrame() {
JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.setLayout(new FlowLayout());
f.add(new JFileChooser());
f.add(new JFileChooser());
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
PanelBrowser, shown below, is a basic prototype that functions similarly to the Mac OS X Finder column view illustrated in your question.
Update: Added horizontal scrolling and more file information.
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.io.File;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.DefaultListCellRenderer;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.filechooser.FileSystemView;
/**
* @see http://stackoverflow.com/a/15104660/230513
*/
public class PanelBrowser extends Box {
private static final Dimension SIZE = new Dimension(200, 300);
private List<FilePanel> list = new ArrayList<FilePanel>();
public PanelBrowser(File root) {
super(BoxLayout.LINE_AXIS);
setBackground(Color.red);
FilePanel panel = new FilePanel(this, root);
list.add(panel);
this.add(panel);
}
private void update(FilePanel fp, File file) {
int index = list.indexOf(fp);
int i = list.size() - 1;
while (i > index) {
list.remove(i);
this.remove(i);
i--;
}
final FilePanel panel = new FilePanel(this, file);
list.add(panel);
this.add(panel);
revalidate();
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
scrollRectToVisible(panel.getBounds());
}
});
}
private static class FilePanel extends Box {
private static FileSystemView fsv = FileSystemView.getFileSystemView();
private static DateFormat df = DateFormat.getDateTimeInstance(
DateFormat.SHORT, DateFormat.DEFAULT);
private PanelBrowser parent;
private JList list;
public FilePanel(PanelBrowser parent, File file) {
super(BoxLayout.PAGE_AXIS);
this.parent = parent;
DefaultListModel model = new DefaultListModel();
if (file.isFile()) {
JLabel name = new JLabel(file.getName());
name.setIcon(fsv.getSystemIcon(file));
this.add(name);
Date d = new Date(file.lastModified());
JLabel mod = new JLabel("Date: " + df.format(d));
this.add(mod);
final String v = String.valueOf(file.length());
JLabel length = new JLabel("Size: " + v);
this.add(length);
}
if (file.isDirectory()) {
for (File f : file.listFiles()) {
model.addElement(f);
}
list = new JList(model);
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.setCellRenderer(new FileRenderer());
list.addListSelectionListener(new SelectionHandler());
this.add(new JScrollPane(list) {
@Override
public int getVerticalScrollBarPolicy() {
return JScrollPane.VERTICAL_SCROLLBAR_ALWAYS;
}
});
}
}
private static class FileRenderer extends DefaultListCellRenderer {
@Override
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
JLabel label = (JLabel) super.getListCellRendererComponent(
list, value, index, isSelected, cellHasFocus);
File f = (File) value;
setText(f.getName());
setIcon(fsv.getSystemIcon(f));
return label;
}
}
private class SelectionHandler implements ListSelectionListener {
@Override
public void valueChanged(ListSelectionEvent e) {
if (!e.getValueIsAdjusting()) {
File f = (File) list.getSelectedValue();
parent.update(FilePanel.this, f);
}
}
}
@Override
public Dimension getMinimumSize() {
return new Dimension(SIZE);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(SIZE);
}
@Override
public Dimension getMaximumSize() {
return new Dimension(SIZE.width, Short.MAX_VALUE);
}
}
private static void display() {
String path = System.getProperty("user.dir");
PanelBrowser browser = new PanelBrowser(new File(path));
JFrame f = new JFrame(path);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new JScrollPane(browser) {
@Override
public int getVerticalScrollBarPolicy() {
return JScrollPane.VERTICAL_SCROLLBAR_NEVER;
}
});
f.pack();
f.setSize(4 * SIZE.width, SIZE.height);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
display();
}
});
}
}
来源：https://stackoverflow.com/questions/15073853/choosing-a-file-in-pane-with-swing