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Группа: Модератор
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Регистрация: 2.7.2002
Где: Санкт-Петербург
Репутация: 51 Всего: 118
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Можно было бы поискать в сылках, но так уж и быть. Не стал добавлять файлы с картинками - так тоже работает. Код | /** * Copyright 1999-2002 Matthew Robinson and Pavel Vorobiev. * All Rights Reserved. * * =================================================== * This program contains code from the book "Swing" * 2nd Edition by Matthew Robinson and Pavel Vorobiev * http://www.spindoczine.com/sbe * =================================================== * * The above paragraph must be included in full, unmodified * and completely intact in the beginning of any source code * file that references, copies or uses (in any way, shape * or form) code contained in this file. */
import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*;
import javax.swing.*; import javax.swing.tree.*; import javax.swing.event.*; import javax.swing.border.*;
public class DirTree extends JFrame {
public static final String APP_NAME = "Directories Tree";
public static final ImageIcon ICON_COMPUTER = new ImageIcon("computer.gif"); public static final ImageIcon ICON_DISK = new ImageIcon("disk.gif"); public static final ImageIcon ICON_FOLDER = new ImageIcon("folder.gif"); public static final ImageIcon ICON_EXPANDEDFOLDER = new ImageIcon("expandedfolder.gif");
protected JTree m_tree; protected DefaultTreeModel m_model; protected JTextField m_display;
protected DefaultTreeCellEditor m_editor; protected FileNode m_editingNode; protected JPopupMenu m_popup; protected Action m_expandAction; protected TreePath m_clickedPath;
public DirTree() { super(APP_NAME); setSize(400, 300);
DefaultMutableTreeNode top = new DefaultMutableTreeNode( new IconData(ICON_COMPUTER, null, "Computer"));
DefaultMutableTreeNode node; File[] roots = File.listRoots(); for (int k=0; k<roots.length; k++) { node = new DefaultMutableTreeNode(new IconData(ICON_DISK, null, new FileNode(roots[k]))); top.add(node); node.add( new DefaultMutableTreeNode(new Boolean(true))); }
m_model = new DefaultTreeModel(top); m_tree = new JTree(m_model) { public boolean isPathEditable(TreePath path) { if (path == null || path.getPathCount() < 3) // Skip first two levels return false; FileNode node = getFileNode(getTreeNode(path)); if (node == null) return false; File dir = node.getFile(); if (dir != null && dir.isDirectory()) { m_editingNode = node; return true; } return false; }
// NEW public String getToolTipText(MouseEvent ev) { if(ev == null) return null; TreePath path = m_tree.getPathForLocation(ev.getX(), ev.getY()); if (path != null) { FileNode fnode = getFileNode(getTreeNode(path)); if (fnode==null) return null; File f = fnode.getFile(); return (f==null ? null : f.getPath()); } return null; } }; ToolTipManager.sharedInstance().registerComponent(m_tree); // important
m_tree.putClientProperty("JTree.lineStyle", "Angled");
IconCellRenderer renderer = new IconCellRenderer(); m_tree.setCellRenderer(renderer);
m_tree.addTreeExpansionListener(new DirExpansionListener());
m_tree.addTreeSelectionListener(new DirSelectionListener());
m_tree.getSelectionModel().setSelectionMode( TreeSelectionModel.SINGLE_TREE_SELECTION); m_tree.setShowsRootHandles(true);
JScrollPane s = new JScrollPane(); s.getViewport().add(m_tree); getContentPane().add(s, BorderLayout.CENTER);
CellEditorListener cel = new CellEditorListener() { public void editingStopped(ChangeEvent e) { if (m_editingNode != null) { String newName = m_editor.getCellEditorValue().toString(); File dir = m_editingNode.getFile(); File newDir = new File(dir.getParentFile(), newName); dir.renameTo(newDir); // Update tree TreePath path = m_tree.getSelectionPath(); DefaultMutableTreeNode node = getTreeNode(path); IconData idata = new IconData(DirTree.ICON_FOLDER, DirTree.ICON_EXPANDEDFOLDER, new FileNode(newDir)); node.setUserObject(idata); m_model.nodeStructureChanged(node); m_display.setText(newDir.getAbsolutePath()); } m_editingNode = null; }
public void editingCanceled(ChangeEvent e) { m_editingNode = null; } }; m_editor = new DefaultTreeCellEditor(m_tree, renderer); m_editor.addCellEditorListener(cel); m_tree.setCellEditor(m_editor); m_tree.setEditable(true);
JToolBar tb = new JToolBar(); tb.setFloatable(false); m_display = new JTextField(); m_display.setEditable(false); m_display.setBorder(new SoftBevelBorder(BevelBorder.LOWERED)); tb.add(m_display); tb.addSeparator();
m_popup = new JPopupMenu(); m_expandAction = new AbstractAction() { public void actionPerformed(ActionEvent e) { if (m_clickedPath==null) return; if (m_tree.isExpanded(m_clickedPath)) m_tree.collapsePath(m_clickedPath); else m_tree.expandPath(m_clickedPath); } }; m_popup.add(m_expandAction); m_popup.addSeparator();
Action a1 = new AbstractAction("Create", new ImageIcon("New16.gif")) { public void actionPerformed(ActionEvent e) { m_tree.repaint(); TreePath path = m_tree.getSelectionPath(); if (path == null || path.getPathCount() < 2) return; DefaultMutableTreeNode treeNode = getTreeNode(path); FileNode node = getFileNode(treeNode); if (node == null) return;
File dir = node.getFile(); int index = 0; File newDir = new File(dir, "New Directory"); while (newDir.exists()) { index++; newDir = new File(dir, "New Directory"+index); } newDir.mkdirs();
IconData idata = new IconData(DirTree.ICON_FOLDER, DirTree.ICON_EXPANDEDFOLDER, new FileNode(newDir)); DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(idata); treeNode.add(newNode); m_model.nodeStructureChanged(treeNode);
path = path.pathByAddingChild(newNode); System.out.println("path="+path); m_tree.scrollPathToVisible(path); m_tree.startEditingAtPath(path); } }; m_popup.add(a1); JButton bt = tb.add(a1); bt.setToolTipText("Create new directory");
Action a2 = new AbstractAction("Delete", new ImageIcon("Delete16.gif")) { public void actionPerformed(ActionEvent e) { m_tree.repaint(); TreePath path = m_tree.getSelectionPath(); if (path == null || path.getPathCount() < 3) return; DefaultMutableTreeNode treeNode = getTreeNode(path); FileNode node = getFileNode(treeNode); if (node == null) return; File dir = node.getFile(); if (dir != null && dir.isDirectory()) { if (JOptionPane.showConfirmDialog(DirTree.this, "Do you want to delete \ndirectory \""+dir.getName()+"\" ?", DirTree.APP_NAME, JOptionPane.YES_NO_OPTION) != JOptionPane.YES_OPTION) return;
setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)); deleteDirectory(dir); setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
TreeNode parent = treeNode.getParent(); treeNode.removeFromParent(); m_model.nodeStructureChanged(parent); m_display.setText(""); } } }; m_popup.add(a2); bt = tb.add(a2); bt.setToolTipText("Delete directory"); m_tree.registerKeyboardAction(a2, KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0), JComponent.WHEN_FOCUSED);
Action a3 = new AbstractAction("Rename", new ImageIcon("Edit16.gif")) { public void actionPerformed(ActionEvent e) { m_tree.repaint(); TreePath path = m_tree.getSelectionPath(); if (path == null) return; m_tree.scrollPathToVisible(path); m_tree.startEditingAtPath(path); } }; m_popup.add(a3); bt = tb.add(a3); bt.setToolTipText("Rename directory");
getContentPane().add(tb, BorderLayout.NORTH); m_tree.add(m_popup); m_tree.addMouseListener(new PopupTrigger()); }
DefaultMutableTreeNode getTreeNode(TreePath path) { return (DefaultMutableTreeNode)(path.getLastPathComponent()); }
FileNode getFileNode(DefaultMutableTreeNode node) { if (node == null) return null; Object obj = node.getUserObject(); if (obj instanceof IconData) obj = ((IconData)obj).getObject(); if (obj instanceof FileNode) return (FileNode)obj; else return null; }
class PopupTrigger extends MouseAdapter {
public void mouseReleased(MouseEvent e) { if (e.isPopupTrigger()) { int x = e.getX(); int y = e.getY(); TreePath path = m_tree.getPathForLocation(x, y); if (path == null) return;
if (m_tree.isExpanded(path)) m_expandAction.putValue(Action.NAME, "Collapse"); else m_expandAction.putValue(Action.NAME, "Expand");
m_tree.setSelectionPath(path); m_tree.scrollPathToVisible(path); m_popup.show(m_tree, x, y); m_clickedPath = path; } } }
// Make sure expansion is threaded and updating the tree model // only occurs within the event dispatching thread. class DirExpansionListener implements TreeExpansionListener {
public void treeExpanded(TreeExpansionEvent event) {
final DefaultMutableTreeNode node = getTreeNode( event.getPath()); final FileNode fnode = getFileNode(node);
Thread runner = new Thread() { public void run() { if (fnode != null && fnode.expand(node)) { Runnable runnable = new Runnable() { public void run() { m_model.reload(node); } }; SwingUtilities.invokeLater(runnable); } } }; runner.start(); }
public void treeCollapsed(TreeExpansionEvent event) {} }
class DirSelectionListener implements TreeSelectionListener {
public void valueChanged(TreeSelectionEvent event) { DefaultMutableTreeNode node = getTreeNode( event.getPath()); FileNode fnode = getFileNode(node); if (fnode != null) m_display.setText(fnode.getFile(). getAbsolutePath()); else m_display.setText(""); } }
public static void deleteDirectory(File dir) { if (dir == null || !dir.isDirectory() || dir.isHidden()) return; File[] files = dir.listFiles(); if (files != null) for (int k=0; k<files.length; k++) { File f = files[k]; if (f.isDirectory()) deleteDirectory(f); else f.delete(); } dir.delete(); }
public static void main(String argv[]) { DirTree frame = new DirTree(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }
class IconCellRenderer extends DefaultTreeCellRenderer {
public IconCellRenderer() { setLeafIcon(null); setOpenIcon(null); }
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) {
// Invoke default implementation Component result = super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
DefaultMutableTreeNode node = (DefaultMutableTreeNode)value; Object obj = node.getUserObject(); setText(obj.toString());
if (obj instanceof Boolean) setText("Retrieving data...");
if (obj instanceof IconData) { IconData idata = (IconData)obj; if (expanded) setIcon(idata.getExpandedIcon()); else setIcon(idata.getIcon()); } else setIcon(null);
return result; } }
class IconData { protected Icon m_icon; protected Icon m_expandedIcon; protected Object m_data;
public IconData(Icon icon, Object data) { m_icon = icon; m_expandedIcon = null; m_data = data; }
public IconData(Icon icon, Icon expandedIcon, Object data) { m_icon = icon; m_expandedIcon = expandedIcon; m_data = data; }
public Icon getIcon() { return m_icon; }
public Icon getExpandedIcon() { return m_expandedIcon!=null ? m_expandedIcon : m_icon; }
public Object getObject() { return m_data; }
public String toString() { return m_data.toString(); } }
class FileNode { protected File m_file;
public FileNode(File file) { m_file = file; }
public File getFile() { return m_file; }
public String toString() { return m_file.getName().length() > 0 ? m_file.getName() : m_file.getPath(); }
// Alternatively we copud sub-class TreeNode public boolean expand(DefaultMutableTreeNode parent) { DefaultMutableTreeNode flag = (DefaultMutableTreeNode)parent.getFirstChild(); if (flag==null) // No flag return false; Object obj = flag.getUserObject(); if (!(obj instanceof Boolean)) return false; // Already expanded
parent.removeAllChildren(); // Remove Flag
File[] files = listFiles(); if (files == null) return true;
Vector v = new Vector();
for (int k=0; k<files.length; k++) { File f = files[k]; if (!(f.isDirectory())) continue;
FileNode newNode = new FileNode(f);
boolean isAdded = false; for (int i=0; i<v.size(); i++) { FileNode nd = (FileNode)v.elementAt(i); if (newNode.compareTo(nd) < 0) { v.insertElementAt(newNode, i); isAdded = true; break; } } if (!isAdded) v.addElement(newNode); }
for (int i=0; i<v.size(); i++) { FileNode nd = (FileNode)v.elementAt(i); IconData idata = new IconData(DirTree.ICON_FOLDER, DirTree.ICON_EXPANDEDFOLDER, nd); DefaultMutableTreeNode node = new DefaultMutableTreeNode(idata); parent.add(node);
if (nd.hasSubDirs()) node.add(new DefaultMutableTreeNode( new Boolean(true) )); }
return true; }
public boolean hasSubDirs() { File[] files = listFiles(); if (files == null) return false; for (int k=0; k<files.length; k++) { if (files[k].isDirectory()) return true; } return false; }
public int compareTo(FileNode toCompare) { return m_file.getName().compareToIgnoreCase( toCompare.m_file.getName() ); }
protected File[] listFiles() { if (!m_file.isDirectory()) return null; try { return m_file.listFiles(); } catch (Exception ex) { JOptionPane.showMessageDialog(null, "Error reading directory "+m_file.getAbsolutePath(), DirTree.APP_NAME, JOptionPane.WARNING_MESSAGE); return null; } } }
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