в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

Admin: 1 версия

2010-05-31T14:44:45Z

1 версия

Новая страница

== DefaultMutableTreeNode: add(MutableTreeNode newChild) ==



<source lang="java">
import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.ScrollPaneConstants;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
public class MainClass extends JPanel {
public MainClass() {
final JTree tree;
final JTextField jtf;
DefaultMutableTreeNode top = new DefaultMutableTreeNode("Options");
DefaultMutableTreeNode a = new DefaultMutableTreeNode("A");
top.add(a);
DefaultMutableTreeNode a1 = new DefaultMutableTreeNode("A1");
a.add(a1);
DefaultMutableTreeNode a2 = new DefaultMutableTreeNode("A2");
a.add(a2);
DefaultMutableTreeNode b = new DefaultMutableTreeNode("B");
top.add(b);
DefaultMutableTreeNode b1 = new DefaultMutableTreeNode("B1");
b.add(b1);
DefaultMutableTreeNode b2 = new DefaultMutableTreeNode("B2");
b.add(b2);
DefaultMutableTreeNode b3 = new DefaultMutableTreeNode("B3");
b.add(b3);
tree = new JTree(top);
JScrollPane jsp = new JScrollPane(tree);
add(jsp, BorderLayout.CENTER);
jtf = new JTextField("", 20);
add(jtf, BorderLayout.SOUTH);
tree.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent me) {
TreePath tp = tree.getPathForLocation(me.getX(), me.getY());
if (tp != null)
jtf.setText(tp.toString());
else
jtf.setText("");
}
});
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new MainClass());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200, 200);
frame.setVisible(true);
}
}

</source>



== DefaultMutableTreeNode: breadthFirstEnumeration() ==



<source lang="java">
import java.awt.BorderLayout;
import java.util.Enumeration;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class MainClass {
public static void main(String args[]) {
JFrame frame = new JFrame("Traverse Tree");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree();
tree.setRootVisible(true);
TreeModel model = tree.getModel();
Object rootObject = model.getRoot();
if ((rootObject != null) && (rootObject instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode r = (DefaultMutableTreeNode) rootObject;
printDescendents(r);
Enumeration breadth = r.breadthFirstEnumeration();
Enumeration depth = r.depthFirstEnumeration();
Enumeration preOrder = r.preorderEnumeration();
printEnumeration(breadth, "Breadth");
printEnumeration(depth, "Depth");
printEnumeration(preOrder, "Pre");
}
TreeSelectionListener treeSelectionListener = new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent treeSelectionEvent) {
JTree treeSource = (JTree) treeSelectionEvent.getSource();
TreePath path = treeSource.getSelectionPath();
System.out.println(path);
System.out.println(path.getPath());
System.out.println(path.getParentPath());
System.out.println(((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject());
System.out.println(path.getPathCount());
}
};
tree.addTreeSelectionListener(treeSelectionListener);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 400);
frame.setVisible(true);
}
private static void printEnumeration(Enumeration e, String label) {
System.out.println("-----" + label + "-----");
while (e.hasMoreElements()) {
System.out.println(e.nextElement());
}
}
public static void printDescendents(TreeNode root) {
System.out.println(root);
Enumeration children = root.children();
if (children != null) {
while (children.hasMoreElements()) {
printDescendents((TreeNode) children.nextElement());
}
}
}
}

</source>



== DefaultMutableTreeNode: depthFirstEnumeration() ==



<source lang="java">
import java.awt.BorderLayout;
import java.util.Enumeration;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class MainClass {
public static void main(String args[]) {
JFrame frame = new JFrame("Traverse Tree");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree();
tree.setRootVisible(true);
TreeModel model = tree.getModel();
Object rootObject = model.getRoot();
if ((rootObject != null) && (rootObject instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode r = (DefaultMutableTreeNode) rootObject;
printDescendents(r);
Enumeration breadth = r.breadthFirstEnumeration();
Enumeration depth = r.depthFirstEnumeration();
Enumeration preOrder = r.preorderEnumeration();
printEnumeration(breadth, "Breadth");
printEnumeration(depth, "Depth");
printEnumeration(preOrder, "Pre");
}
TreeSelectionListener treeSelectionListener = new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent treeSelectionEvent) {
JTree treeSource = (JTree) treeSelectionEvent.getSource();
TreePath path = treeSource.getSelectionPath();
System.out.println(path);
System.out.println(path.getPath());
System.out.println(path.getParentPath());
System.out.println(((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject());
System.out.println(path.getPathCount());
}
};
tree.addTreeSelectionListener(treeSelectionListener);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 400);
frame.setVisible(true);
}
private static void printEnumeration(Enumeration e, String label) {
System.out.println("-----" + label + "-----");
while (e.hasMoreElements()) {
System.out.println(e.nextElement());
}
}
public static void printDescendents(TreeNode root) {
System.out.println(root);
Enumeration children = root.children();
if (children != null) {
while (children.hasMoreElements()) {
printDescendents((TreeNode) children.nextElement());
}
}
}
}

</source>



== DefaultMutableTreeNode: getUserObject() ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.ToolTipManager;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;
public class MainClass {
public static void main(final String args[]) {
JFrame frame = new JFrame("Tree Tips");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree(new String[]{"a","b","c"});
ToolTipManager.sharedInstance().registerComponent(tree);
TreeCellRenderer renderer = new ToolTipTreeCellRenderer();
tree.setCellRenderer(renderer);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class ToolTipTreeCellRenderer implements TreeCellRenderer {
DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
public ToolTipTreeCellRenderer() {
}
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected,
boolean expanded, boolean leaf, int row, boolean hasFocus) {
Object tip = null;
if (value != null) {

if (value instanceof DefaultMutableTreeNode) {
tip = ((DefaultMutableTreeNode) value).getUserObject();
} else {
tip = tree.convertValueToText(value, selected, expanded, leaf, row, hasFocus);
}
renderer.setToolTipText((String)tip);
}
renderer.setText((String)tip);
return renderer;
}
}

</source>



== DefaultMutableTreeNode: preorderEnumeration() ==



<source lang="java">
import java.awt.BorderLayout;
import java.util.Enumeration;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class MainClass {
public static void main(String args[]) {
JFrame frame = new JFrame("Traverse Tree");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree();
tree.setRootVisible(true);
TreeModel model = tree.getModel();
Object rootObject = model.getRoot();
if ((rootObject != null) && (rootObject instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode r = (DefaultMutableTreeNode) rootObject;
printDescendents(r);
Enumeration breadth = r.breadthFirstEnumeration();
Enumeration depth = r.depthFirstEnumeration();
Enumeration preOrder = r.preorderEnumeration();
printEnumeration(breadth, "Breadth");
printEnumeration(depth, "Depth");
printEnumeration(preOrder, "Pre");
}
TreeSelectionListener treeSelectionListener = new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent treeSelectionEvent) {
JTree treeSource = (JTree) treeSelectionEvent.getSource();
TreePath path = treeSource.getSelectionPath();
System.out.println(path);
System.out.println(path.getPath());
System.out.println(path.getParentPath());
System.out.println(((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject());
System.out.println(path.getPathCount());
}
};
tree.addTreeSelectionListener(treeSelectionListener);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 400);
frame.setVisible(true);
}
private static void printEnumeration(Enumeration e, String label) {
System.out.println("-----" + label + "-----");
while (e.hasMoreElements()) {
System.out.println(e.nextElement());
}
}
public static void printDescendents(TreeNode root) {
System.out.println(root);
Enumeration children = root.children();
if (children != null) {
while (children.hasMoreElements()) {
printDescendents((TreeNode) children.nextElement());
}
}
}
}

</source>



== DefaultMutableTreeNode: setToolTipText(String text) ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.ruponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.ToolTipManager;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;
public class MainClass {
public static void main(final String args[]) {
JFrame frame = new JFrame("Tree Tips");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree(new String[]{"a","b","c"});
ToolTipManager.sharedInstance().registerComponent(tree);
TreeCellRenderer renderer = new ToolTipTreeCellRenderer();
tree.setCellRenderer(renderer);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class ToolTipTreeCellRenderer implements TreeCellRenderer {
DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
public ToolTipTreeCellRenderer() {
}
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected,
boolean expanded, boolean leaf, int row, boolean hasFocus) {
Object tip = null;
if (value != null) {

if (value instanceof DefaultMutableTreeNode) {
tip = ((DefaultMutableTreeNode) value).getUserObject();
} else {
tip = tree.convertValueToText(value, selected, expanded, leaf, row, hasFocus);
}
renderer.setToolTipText((String)tip);
}
renderer.setText((String)tip);
return renderer;
}
}

</source>



== new DefaultMutableTreeNode(String text) ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.ScrollPaneConstants;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
public class MainClass extends JPanel {
public MainClass() {
final JTree tree;
final JTextField jtf;
DefaultMutableTreeNode top = new DefaultMutableTreeNode("Options");
DefaultMutableTreeNode a = new DefaultMutableTreeNode("A");
top.add(a);
DefaultMutableTreeNode a1 = new DefaultMutableTreeNode("A1");
a.add(a1);
DefaultMutableTreeNode a2 = new DefaultMutableTreeNode("A2");
a.add(a2);
DefaultMutableTreeNode b = new DefaultMutableTreeNode("B");
top.add(b);
DefaultMutableTreeNode b1 = new DefaultMutableTreeNode("B1");
b.add(b1);
DefaultMutableTreeNode b2 = new DefaultMutableTreeNode("B2");
b.add(b2);
DefaultMutableTreeNode b3 = new DefaultMutableTreeNode("B3");
b.add(b3);
tree = new JTree(top);
JScrollPane jsp = new JScrollPane(tree);
add(jsp, BorderLayout.CENTER);
jtf = new JTextField("", 20);
add(jtf, BorderLayout.SOUTH);
tree.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent me) {
TreePath tp = tree.getPathForLocation(me.getX(), me.getY());
if (tp != null)
jtf.setText(tp.toString());
else
jtf.setText("");
}
});
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new MainClass());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200, 200);
frame.setVisible(true);
}
}

</source>

← Предыдущая	Версия 17:43, 31 мая 2010
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Java by API/javax.swing.tree/DefaultMutableTreeNode - История изменений

в 17:43, 31 мая 2010

Admin: 1 версия