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MainPanel.java
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/
MainPanel.java
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// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ItemEvent;
import java.io.File;
import java.io.IOException;
import java.io.Serializable;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout());
JRadioButton check1 = new JRadioButton("Default", true);
JRadioButton check2 = new JRadioButton("Directory < File", false);
JRadioButton check3 = new JRadioButton("Group Sorting", false);
JTable table = makeTable();
RowSorter<? extends TableModel> sorter = table.getRowSorter();
if (sorter instanceof TableRowSorter) {
TableRowSorter<? extends TableModel> rs = (TableRowSorter<? extends TableModel>) sorter;
IntStream.range(0, 3).forEach(i -> rs.setComparator(i, new DefaultFileComparator(i)));
check1.addItemListener(e -> {
if (e.getStateChange() == ItemEvent.SELECTED) {
IntStream.range(0, 3)
.forEach(i -> rs.setComparator(i, new DefaultFileComparator(i)));
}
});
check2.addItemListener(e -> {
if (e.getStateChange() == ItemEvent.SELECTED) {
IntStream.range(0, 3)
.forEach(i -> rs.setComparator(i, new FileComparator(i)));
}
});
check3.addItemListener(e -> {
if (e.getStateChange() == ItemEvent.SELECTED) {
IntStream.range(0, 3)
.forEach(i -> rs.setComparator(i, new FileGroupComparator(table, i)));
}
});
}
JPanel p = new JPanel();
ButtonGroup bg = new ButtonGroup();
Stream.of(check1, check2, check3).forEach(rb -> {
bg.add(rb);
p.add(rb);
});
add(p, BorderLayout.NORTH);
add(new JScrollPane(table));
setPreferredSize(new Dimension(320, 240));
}
private static JTable makeTable() {
String[] columnNames = {"Name", "Size", "Full Path"};
TableModel model = new DefaultTableModel(columnNames, 0) {
@Override public Class<?> getColumnClass(int column) {
return File.class;
}
};
return new JTable(model) {
@Override public void updateUI() {
super.updateUI();
putClientProperty("Table.isFileList", Boolean.TRUE);
setCellSelectionEnabled(true);
setIntercellSpacing(new Dimension());
setComponentPopupMenu(new TablePopupMenu());
setShowGrid(false);
setFillsViewportHeight(true);
setAutoCreateRowSorter(true);
setDropMode(DropMode.INSERT_ROWS);
setTransferHandler(new FileTransferHandler());
setDefaultRenderer(Object.class, new FileIconCellRenderer());
}
};
}
public static void main(String[] args) {
EventQueue.invokeLater(MainPanel::createAndShowGui);
}
private static void createAndShowGui() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (UnsupportedLookAndFeelException ignored) {
Toolkit.getDefaultToolkit().beep();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
ex.printStackTrace();
return;
}
JFrame frame = new JFrame("@title@");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new MainPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
class FileIconCellRenderer extends DefaultTableCellRenderer {
private final transient FileSystemView fileSystemView = FileSystemView.getFileSystemView();
@Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component c = super.getTableCellRendererComponent(
table, value, isSelected, hasFocus, row, column);
if (c instanceof JLabel && value instanceof File) {
JLabel l = (JLabel) c;
l.setHorizontalAlignment(LEFT);
l.setIcon(null);
File file = (File) value;
switch (table.convertColumnIndexToModel(column)) {
case 0:
// ???: WindowsLnF, Java 1.7.0
// if (file.isDirectory()) {
// l.setIcon(UIManager.getIcon("FileView.directoryIcon"));
// } else {
// l.setIcon(UIManager.getIcon("FileView.fileIcon"));
// }
l.setIcon(fileSystemView.getSystemIcon(file));
l.setText(fileSystemView.getSystemDisplayName(file));
// l.setText(file.getName());
break;
case 1:
l.setHorizontalAlignment(RIGHT);
l.setText(file.isDirectory() ? "" : Long.toString(file.length()));
break;
case 2:
l.setText(file.getAbsolutePath());
break;
default:
break;
}
}
return c;
}
}
class FileTransferHandler extends TransferHandler {
@Override public int getSourceActions(JComponent component) {
return COPY;
}
@Override public boolean canImport(TransferHandler.TransferSupport support) {
return support.isDataFlavorSupported(DataFlavor.javaFileListFlavor);
}
@Override public boolean importData(TransferHandler.TransferSupport support) {
List<?> list;
try {
list = (List<?>) support.getTransferable().getTransferData(DataFlavor.javaFileListFlavor);
} catch (UnsupportedFlavorException | IOException ex) {
return false;
}
DefaultTableModel model = (DefaultTableModel) ((JTable) support.getComponent()).getModel();
list.stream().filter(File.class::isInstance).map(File.class::cast)
.map(f -> Collections.nCopies(3, f).toArray()).forEach(model::addRow);
return true;
}
}
class DefaultFileComparator implements Comparator<File>, Serializable {
private static final long serialVersionUID = 1L;
private final int column;
protected DefaultFileComparator(int column) {
this.column = column;
}
@Override public int compare(File a, File b) {
switch (column) {
case 0: return a.getName().compareToIgnoreCase(b.getName());
case 1: return Long.compare(a.length(), b.length());
default: return a.getAbsolutePath().compareToIgnoreCase(b.getAbsolutePath());
}
}
public int getColumn() {
return column;
}
}
class FileComparator extends DefaultFileComparator {
private static final long serialVersionUID = 1L;
protected FileComparator(int column) {
super(column);
}
@Override public int compare(File a, File b) {
if (a.isDirectory() && !b.isDirectory()) {
return -1;
} else if (!a.isDirectory() && b.isDirectory()) {
return 1;
} else {
return super.compare(a, b);
}
}
}
// > dir /O:GN
// > ls --group-directories-first
class FileGroupComparator extends DefaultFileComparator {
private static final long serialVersionUID = 1L;
private final JTable table;
protected FileGroupComparator(JTable table, int column) {
super(column);
this.table = table;
}
@Override public int compare(File a, File b) {
int flag = 1;
List<? extends RowSorter.SortKey> keys = table.getRowSorter().getSortKeys();
if (!keys.isEmpty()) {
RowSorter.SortKey sortKey = keys.get(0);
if (sortKey.getColumn() == getColumn() && sortKey.getSortOrder() == SortOrder.DESCENDING) {
flag = -1;
}
}
if (a.isDirectory() && !b.isDirectory()) {
return -1 * flag;
} else if (!a.isDirectory() && b.isDirectory()) {
return flag;
} else {
return super.compare(a, b);
}
}
}
// class FileTableModel extends AbstractTableModel {
// private final String[] columnNames = {"Name", "Size", "Full Path"};
// private File[] files;
//
// protected FileTableModel() {
// this(new File[0]);
// }
//
// protected FileTableModel(File[] files) {
// this.files = files;
// }
//
// @Override public Object getValueAt(int row, int column) {
// return files[row];
// }
//
// @Override public int getColumnCount() {
// return columnNames.length;
// }
//
// @Override public Class<?> getColumnClass(int column) {
// return File.class;
// }
//
// @Override public String getColumnName(int column) {
// return columnNames[column];
// }
//
// @Override public int getRowCount() {
// return files.length;
// }
//
// public File getFile(int row) {
// return files[row];
// }
//
// public void setFiles(File[] files) {
// this.files = files;
// fireTableDataChanged();
// }
//
// // public void removeRow(int row) {
// // files.removeElementAt(row);
// // fireTableRowsDeleted(row, row);
// // }
// }
final class TablePopupMenu extends JPopupMenu {
private final JMenuItem delete;
/* default */ TablePopupMenu() {
super();
delete = add("delete");
delete.addActionListener(e -> deleteSelectedRows());
}
@Override public void show(Component c, int x, int y) {
if (c instanceof JTable) {
delete.setEnabled(((JTable) c).getSelectedRowCount() > 0);
super.show(c, x, y);
}
}
private void deleteSelectedRows() {
JTable table = (JTable) getInvoker();
DefaultTableModel model = (DefaultTableModel) table.getModel();
int[] selection = table.getSelectedRows();
for (int i = selection.length - 1; i >= 0; i--) {
model.removeRow(table.convertRowIndexToModel(selection[i]));
}
}
}