Code
class CheckBoxNodeEditor extends TriStateCheckBox implements TreeCellEditor {
private final FileSystemView fileSystemView;
private final JPanel panel = new JPanel(new BorderLayout());
private DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
private File file;
public CheckBoxNodeEditor(FileSystemView fileSystemView) {
super();
this.fileSystemView = fileSystemView;
this.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
stopCellEditing();
}
});
panel.setFocusable(false);
panel.setRequestFocusEnabled(false);
panel.setOpaque(false);
panel.add(this, BorderLayout.WEST);
this.setOpaque(false);
}
@Override public Component getTreeCellEditorComponent(
JTree tree, Object value, boolean isSelected, boolean expanded,
boolean leaf, int row) {
JLabel l = (JLabel)renderer.getTreeCellRendererComponent(
tree, value, true, expanded, leaf, row, true);
l.setFont(tree.getFont());
setOpaque(false);
if(value != null && value instanceof DefaultMutableTreeNode) {
this.setEnabled(tree.isEnabled());
this.setFont(tree.getFont());
Object userObject = ((DefaultMutableTreeNode)value).getUserObject();
if(userObject!=null && userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode)userObject;
if(node.status==Status.INDETERMINATE) {
setIcon(new IndeterminateIcon());
}else{
setIcon(null);
}
file = node.file;
l.setIcon(fileSystemView.getSystemIcon(file));
l.setText(fileSystemView.getSystemDisplayName(file));
setSelected(node.status==Status.SELECTED);
}
//panel.add(this, BorderLayout.WEST);
panel.add(l);
return panel;
}
return l;
}
@Override public Object getCellEditorValue() {
return new CheckBoxNode(file, isSelected()?Status.SELECTED:Status.DESELECTED);
}
@Override public boolean isCellEditable(EventObject e) {
if(e != null && e instanceof MouseEvent && e.getSource() instanceof JTree) {
MouseEvent me = (MouseEvent)e;
JTree tree = (JTree)e.getSource();
TreePath path = tree.getPathForLocation(me.getX(), me.getY());
Rectangle r = tree.getPathBounds(path);
if(r==null) return false;
Dimension d = getPreferredSize();
r.setSize(new Dimension(d.width, r.height));
if(r.contains(me.getX(), me.getY())) {
if(file==null && System.getProperty("java.version").startsWith("1.7.0")) {
System.out.println("XXX: Java 7, only on first run\n"+getBounds());
setBounds(new Rectangle(0,0,d.width,r.height));
}
return true;
}
}
return false;
}
@Override public void updateUI() {
super.updateUI();
if(panel!=null) panel.updateUI();
//1.6.0_24 bug??? @see 1.7.0 DefaultTreeCellRenderer#updateUI()
renderer = new DefaultTreeCellRenderer();
}
//......
References
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