java swing树形控件示例源码(treeview)

AboveCellTreeToolTips.zip
// -*- mode:java; encoding:utf-8 -*-// vim:set fileencoding=utf-8:// @homepage@package example;import java.awt.*;import java.awt.event.MouseEvent;import java.util.Objects;import javax.swing.*;import javax.swing.tree.DefaultMutableTreeNode;import javax.swing.tree.DefaultTreeCellRenderer;import javax.swing.tree.DefaultTreeModel;import javax.swing.tree.TreeCellRenderer;import javax.swing.tree.TreeModel;import javax.swing.tree.TreeSelectionModel;public final class MainPanel extends JPanel { private MainPanel() { super(new BorderLayout()); JTree tree0 = new JTree(new DefaultTreeModel(makeTreeRoot())) { @Override public void updateUI() { super.updateUI(); setCellRenderer(new TooltipTreeCellRenderer()); } }; ToolTipManager.sharedInstance().registerComponent(tree0); JTree tree1 = new TooltipTree(new DefaultTreeModel(makeTreeRoot())); ToolTipManager.sharedInstance().registerComponent(tree1); JPanel p = new JPanel(new GridLayout(2, 1)); p.add(makeTitledPanel("Default location", tree0)); p.add(makeTitledPanel("Draw directly above the cell", tree1)); JSplitPane sp = new JSplitPane(); sp.setResizeWeight(.5); sp.setLeftComponent(p); sp.setRightComponent(new JLabel("dummy panel")); add(sp); setPreferredSize(new Dimension(320, 240)); } private static DefaultMutableTreeNode makeTreeRoot() { DefaultMutableTreeNode set4 = new DefaultMutableTreeNode("Set 00000004"); set4.add(new DefaultMutableTreeNode("222222111111111111111122222")); set4.add(new DefaultMutableTreeNode("eeeeeeeeeeeee")); set4.add(new DefaultMutableTreeNode("bbbbbbbbbbbb")); set4.add(new DefaultMutableTreeNode("zzzzzzz")); DefaultMutableTreeNode set1 = new DefaultMutableTreeNode("Set 00000001"); set1.add(new DefaultMutableTreeNode("33333333333333333333333333333333333")); set1.add(new DefaultMutableTreeNode("111111111")); set1.add(new DefaultMutableTreeNode("22222222222")); set1.add(set4); set1.add(new DefaultMutableTreeNode("222222")); set1.add(new DefaultMutableTreeNode("222222222")); DefaultMutableTreeNode set2 = new DefaultMutableTreeNode("Set 00000002"); set2.add(new DefaultMutableTreeNode("eeeeeeeeeeeee")); set2.add(new DefaultMutableTreeNode("bbbbbbbbbbbb")); DefaultMutableTreeNode set3 = new DefaultMutableTreeNode("Set 00000003"); set3.add(new DefaultMutableTreeNode("zzzzzzz")); set3.add(new DefaultMutableTreeNode("aaaaaaaaaaaa")); set3.add(new DefaultMutableTreeNode("ccccccccc")); DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root"); root.add(new DefaultMutableTreeNode("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")); root.add(set3); root.add(new DefaultMutableTreeNode("eeeeeeeeeeeeeeeeeeeeeeeeeeeee")); root.add(set1); root.add(set2); root.add(new DefaultMutableTreeNode("22222222222222222222222222222222222")); root.add(new DefaultMutableTreeNode("bbbbbbbbbbbbbbbbbbbbbbbbbbbbb")); return root; } private static Component makeTitledPanel(String title, Component c) { JScrollPane scroll = new JScrollPane(c); scroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); JPanel p = new JPanel(new BorderLayout()); p.setBorder(BorderFactory.createTitledBorder(title)); p.add(scroll); return p; } public static void main(String... args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { createAndShowGui(); } }); } public static void createAndShowGui() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); Toolkit.getDefaultToolkit().beep(); } 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 TooltipTree extends JTree { private final JLabel label = new JLabel() { @Override public Dimension getPreferredSize() { Dimension d = super.getPreferredSize(); d.height = getRowHeight(); return d; } }; protected TooltipTree(TreeModel model) { super(model); } @Override public void updateUI() { super.updateUI(); // setRowHeight(24); setCellRenderer(new TooltipTreeCellRenderer()); } @Override public Point getToolTipLocation(MouseEvent e) { Point p = e.getPoint(); int i = getRowForLocation(p.x, p.y); Rectangle cellBounds = getRowBounds(i); if (i >= 0 && Objects.nonNull(cellBounds) && cellBounds.contains(p.x, p.y)) { TreeSelectionModel tsm = getSelectionModel(); Object node = getPathForRow(i).getLastPathComponent(); // System.out.println(node); boolean hasFocus = hasFocus() && tsm.getLeadSelectionRow() == i; boolean isLeaf = getModel().isLeaf(node); TreeCellRenderer r = getCellRenderer(); Component tcr = r.getTreeCellRendererComponent(this, node, isRowSelected(i), isExpanded(i), isLeaf, i, hasFocus); if (tcr instanceof JComponent && Objects.nonNull(((JComponent) tcr).getToolTipText())) { // System.out.println(((JComponent) tcr).getToolTipText()); Point pt = cellBounds.getLocation(); // label.setBorder(BorderFactory.createLineBorder(Color.RED)); Insets ins = label.getInsets(); pt.translate(-ins.left, -ins.top); label.setIcon(new RendererIcon(tcr, cellBounds)); // System.out.println(pt); return pt; } } return null; } // @Override public String getToolTipText(MouseEvent e) { // String str = super.getToolTipText(e); // System.out.println("getToolTipText: " str); // return str; // } @Override public JToolTip createToolTip() { JToolTip tip = new JToolTip() { @Override public Dimension getPreferredSize() { return label.getPreferredSize(); } }; // System.out.println("createToolTip"); tip.setBorder(BorderFactory.createEmptyBorder()); tip.setLayout(new BorderLayout()); tip.setComponent(this); tip.add(label); return tip; }}class TooltipTreeCellRenderer implements TreeCellRenderer { private final TreeCellRenderer renderer = new DefaultTreeCellRenderer(); @Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { JLabel l = (JLabel) renderer.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus); l.setToolTipText(value == null ? null : value.toString()); // Container c = SwingUtilities.getAncestorOfClass(JScrollPane.class, tree); // if (c instanceof JScrollPane) { // Insets i = l.getInsets(); // Rectangle rect = ((JScrollPane) c).getViewportBorderBounds(); // FontMetrics fm = l.getFontMetrics(l.getFont()); // String str = Objects.toString(value, ""); // l.setToolTipText(fm.stringWidth(str) > rect.width ? str : null); // } return l; }}class RendererIcon implements Icon { private final Component renderer; private final Rectangle rect; protected RendererIcon(Component renderer, Rectangle rect) { this.renderer = renderer; this.rect = rect; rect.setLocation(0, 0); } @Override public void paintIcon(Component c, Graphics g, int x, int y) { if (c instanceof Container) { Graphics2D g2 = (Graphics2D) g.create(); g2.clearRect(0, 0, c.getWidth(), c.getHeight()); // g2.translate(x, y); SwingUtilities.paintComponent(g2, renderer, (Container) c, rect); g2.dispose(); } } @Override public int getIconWidth() { return renderer.getPreferredSize().width; } @Override public int getIconHeight() { return renderer.getPreferredSize().height; }}