java jtree 节点图标前还能加文本框吗? jtree不熟。我想问问楼主,要换成文本框的目的是...?想要修改jtree的值么?如果这样的话,可以弄的click事件的监听。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 不让新手编辑自己的帖子,发到此处吧:源码长度有限制,只能删除引用项,请自行添加,谢谢!public class CheckNodeTreeExample extends JFrame { public CheckNodeTreeExample() { super("CheckNode TreeExample"); String[] strs = {"swing", // 0 "platf", // 1 "0-basic", // 2 "1-metal", // 3 "JTree", "0-ggg","1-fff","2-ttt"}; // 4 CheckNode[] nodes = new CheckNode[strs.length]; for (int i=0;i<strs.length;i++) { nodes[i] = new CheckNode(strs[i]); } nodes[0].add(nodes[1]); nodes[1].add(nodes[2]); nodes[1].add(nodes[3]); nodes[0].add(nodes[4]); nodes[4].add(nodes[5]); nodes[4].add(nodes[6]); nodes[4].add(nodes[7]); nodes[3].setSelected(true); JTree tree = new JTree( nodes[0] ); tree.setCellRenderer(new CheckRenderer()); tree.getSelectionModel().setSelectionMode( TreeSelectionModel.SINGLE_TREE_SELECTION ); tree.putClientProperty("JTree.lineStyle", "Angled"); tree.addMouseListener(new NodeSelectionListener(tree)); JScrollPane sp = new JScrollPane(tree); ModePanel mp = new ModePanel(nodes); JTextArea textArea = new JTextArea(3,10); JScrollPane textPanel = new JScrollPane(textArea); JButton button = new JButton("print"); button.addActionListener( new ButtonActionListener(nodes[0], textArea)); JPanel panel = new JPanel(new BorderLayout()); panel.add(mp, BorderLayout.CENTER); panel.add(button, BorderLayout.SOUTH); getContentPane().add(sp, BorderLayout.CENTER); getContentPane().add(panel, BorderLayout.EAST); getContentPane().add(textPanel, BorderLayout.SOUTH); } class NodeSelectionListener extends MouseAdapter { JTree tree; NodeSelectionListener(JTree tree) { this.tree = tree; } public void mouseClicked(MouseEvent e) { int x = e.getX(); int y = e.getY(); int row = tree.getRowForLocation(x, y); TreePath path = tree.getPathForRow(row); //TreePath path = tree.getSelectionPath(); if (path != null) { CheckNode node = (CheckNode)path.getLastPathComponent(); boolean isSelected = ! (node.isSelected()); node.setSelected(isSelected); if (node.getSelectionMode() == CheckNode.DIG_IN_SELECTION) { if ( isSelected) { tree.expandPath(path); } else { tree.collapsePath(path); } } ((DefaultTreeModel) tree.getModel()).nodeChanged(node); // I need revalidate if node is root. but why? if (row == 0) { tree.revalidate(); tree.repaint(); } } } } class ModePanel extends JPanel implements ActionListener { CheckNode[] nodes; JRadioButton b_single, b_dig_in; ModePanel(CheckNode[] nodes) { this.nodes = nodes; setLayout(new GridLayout(2, 1)); setBorder(new TitledBorder("Check Mode")); ButtonGroup group = new ButtonGroup(); add(b_dig_in = new JRadioButton("DIG_IN ")); add(b_single = new JRadioButton("SINGLE ")); group.add(b_dig_in); group.add(b_single); b_dig_in.addActionListener(this); b_single.addActionListener(this); b_dig_in.setSelected(true); } public void actionPerformed(ActionEvent e) { int mode; if (b_single == e.getSource()) { mode = CheckNode.SINGLE_SELECTION; } else { mode = CheckNode.DIG_IN_SELECTION; } for (int i = 0; i < nodes.length; i++) { nodes[i].setSelectionMode(mode); } } } class ButtonActionListener implements ActionListener { CheckNode root; JTextArea textArea; ButtonActionListener(final CheckNode root, final JTextArea textArea) { this.root = root; this.textArea = textArea; } public void actionPerformed(ActionEvent ev) { Enumeration e = root.breadthFirstEnumeration(); while (e.hasMoreElements()) { CheckNode node = (CheckNode) e.nextElement(); if (node.isSelected()) { TreeNode[] nodes = node.getPath(); textArea.append("\n" + nodes[0].toString()); for (int i = 1; i < nodes.length; i++) { textArea.append("/" + nodes[i].toString()); } } } } } public static void main(String args[]) { CheckNodeTreeExample frame = new CheckNodeTreeExample(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); frame.setSize(300, 200); frame.setVisible(true); }}class CheckRenderer extends JPanel implements TreeCellRenderer { protected JTextField check; protected TreeLabel label; public CheckRenderer() { setLayout(null); add(check = new JTextField()); add(label = new TreeLabel()); check.setBackground(UIManager.getColor("Tree.textBackground")); label.setForeground(UIManager.getColor("Tree.textForeground")); } public Component getTreeCellRendererComponent(JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row, boolean hasFocus) { String stringValue = tree.convertValueToText(value, isSelected, expanded, leaf, row, hasFocus); setEnabled(tree.isEnabled()); check.setEditable(true); label.setFont(tree.getFont()); label.setText(stringValue); label.setSelected(isSelected); label.setFocus(hasFocus); if (leaf) { label.setIcon(UIManager.getIcon("Tree.leafIcon")); } else if (expanded) { label.setIcon(UIManager.getIcon("Tree.openIcon")); } else { label.setIcon(UIManager.getIcon("Tree.closedIcon")); } return this; } public Dimension getPreferredSize() { Dimension d_label = label.getPreferredSize(); check.setPreferredSize(new Dimension(d_label.height*2, d_label.height)); Dimension d_check = check.getPreferredSize(); return new Dimension(d_check.width + d_label.width, (d_check.height < d_label.height ? d_label.height : d_check.height)); } public void doLayout() { //check.setPreferredSize(new Dimension(40, 20)); Dimension d_check = check.getPreferredSize(); Dimension d_label = label.getPreferredSize(); int y_check = 0; int y_label = 0; check.setBounds(0, y_check, d_label.height*2, d_label.height); //label.setLocation(d_check.width, y_label); label.setBounds(d_check.width, y_label, d_label.width, d_label.height); } public void setBackground(Color color) { if (color instanceof ColorUIResource) color = null; super.setBackground(color); } public class TreeLabel extends JLabel { boolean isSelected; boolean hasFocus; public TreeLabel() { } public void setBackground(Color color) { if (color instanceof ColorUIResource) color = null; super.setBackground(color); } public void paint(Graphics g) { String str; if ((str = getText()) != null) { if (0 < str.length()) { if (isSelected) { g.setColor(UIManager .getColor("Tree.selectionBackground")); } else { g.setColor(UIManager.getColor("Tree.textBackground")); } Dimension d = getPreferredSize(); int imageOffset = 0; Icon currentI = getIcon(); if (currentI != null) { imageOffset = currentI.getIconWidth() + Math.max(0, getIconTextGap() - 1); } g.fillRect(imageOffset, 0, d.width - 1 - imageOffset, d.height); if (hasFocus) { g.setColor(UIManager .getColor("Tree.selectionBorderColor")); g.drawRect(imageOffset, 0, d.width - 1 - imageOffset, d.height - 1); } } } super.paint(g); } public Dimension getPreferredSize() { Dimension retDimension = super.getPreferredSize(); if (retDimension != null) { retDimension = new Dimension(retDimension.width + 3, retDimension.height); } return retDimension; } public void setSelected(boolean isSelected) { this.isSelected = isSelected; } public void setFocus(boolean hasFocus) { this.hasFocus = hasFocus; } }}class CheckNode extends DefaultMutableTreeNode { public final static int SINGLE_SELECTION = 0; public final static int DIG_IN_SELECTION = 4; protected int selectionMode; protected boolean isSelected; public CheckNode() { this(null); } public CheckNode(Object userObject) { this(userObject, true, false); } public CheckNode(Object userObject, boolean allowsChildren, boolean isSelected) { super(userObject, allowsChildren); this.isSelected = isSelected; setSelectionMode(DIG_IN_SELECTION); } public void setSelectionMode(int mode) { selectionMode = mode; } public int getSelectionMode() { return selectionMode; } public void setSelected(boolean isSelected) { this.isSelected = isSelected; if ((selectionMode == DIG_IN_SELECTION) && (children != null)) { Enumeration e = children.elements(); while (e.hasMoreElements()) { CheckNode node = (CheckNode) e.nextElement(); node.setSelected(isSelected); } } } public boolean isSelected() { return isSelected; }} class NodeSelectionListener extends MouseAdapter { JTree tree; NodeSelectionListener(JTree tree) { this.tree = tree; } public void mouseClicked(MouseEvent e) { int x = e.getX(); int y = e.getY(); int row = tree.getRowForLocation(x, y); TreePath path = tree.getPathForRow(row); //TreePath path = tree.getSelectionPath(); if (path != null) { CheckNode node = (CheckNode)path.getLastPathComponent(); boolean isSelected = ! (node.isSelected()); node.setSelected(isSelected); if (node.getSelectionMode() == CheckNode.DIG_IN_SELECTION) { if ( isSelected) { tree.expandPath(path); } else { tree.collapsePath(path); } } ((DefaultTreeModel) tree.getModel()).nodeChanged(node); // I need revalidate if node is root. but why? if (row == 0) { tree.revalidate(); tree.repaint(); } } } }呃,不懂。帮忙顶下。这段代码实现了什么功能呀? 我刚开始接触JAVA,对它也不是很了解,我想应该是添加节点鼠标监听,当鼠标在某一节点单击时,取得此节点所在的行列坐标位置以及行数,然后根据选择是列表展开或关闭吧。 为什么下面的程序说我"keysTocutBysections = {{}}"非法表达式开始 初学JAVA菜鸟 this到底该怎么用 关于JMenu AJAX乱码有什么好的解决方案 mvc模式究竟是什么?他究竟有多重要? 强烈建议开展一个java3d论坛! 关于数组的基础问题 请教线程之间通过优先级的高低来判断由哪个线程来执行! java在执行时,与代码的书写顺序有关吗? java里toString方法到底有什么作用呀? 关于JAVA学习中练习跟进的问题 BufferedReader读取大文件内存溢出问题
public class CheckNodeTreeExample extends JFrame {
public CheckNodeTreeExample() {
super("CheckNode TreeExample");
String[] strs = {"swing", // 0
"platf", // 1
"0-basic", // 2
"1-metal", // 3
"JTree",
"0-ggg","1-fff","2-ttt"}; // 4
CheckNode[] nodes = new CheckNode[strs.length];
for (int i=0;i<strs.length;i++) {
nodes[i] = new CheckNode(strs[i]);
}
nodes[0].add(nodes[1]);
nodes[1].add(nodes[2]);
nodes[1].add(nodes[3]);
nodes[0].add(nodes[4]);
nodes[4].add(nodes[5]);
nodes[4].add(nodes[6]);
nodes[4].add(nodes[7]);
nodes[3].setSelected(true);
JTree tree = new JTree( nodes[0] );
tree.setCellRenderer(new CheckRenderer());
tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION
);
tree.putClientProperty("JTree.lineStyle", "Angled");
tree.addMouseListener(new NodeSelectionListener(tree));
JScrollPane sp = new JScrollPane(tree);
ModePanel mp = new ModePanel(nodes);
JTextArea textArea = new JTextArea(3,10);
JScrollPane textPanel = new JScrollPane(textArea);
JButton button = new JButton("print");
button.addActionListener(
new ButtonActionListener(nodes[0], textArea));
JPanel panel = new JPanel(new BorderLayout());
panel.add(mp, BorderLayout.CENTER);
panel.add(button, BorderLayout.SOUTH);
getContentPane().add(sp, BorderLayout.CENTER);
getContentPane().add(panel, BorderLayout.EAST);
getContentPane().add(textPanel, BorderLayout.SOUTH);
}
class NodeSelectionListener extends MouseAdapter {
JTree tree;
NodeSelectionListener(JTree tree) {
this.tree = tree;
}
public void mouseClicked(MouseEvent e) {
int x = e.getX();
int y = e.getY();
int row = tree.getRowForLocation(x, y);
TreePath path = tree.getPathForRow(row);
//TreePath path = tree.getSelectionPath();
if (path != null) {
CheckNode node = (CheckNode)path.getLastPathComponent();
boolean isSelected = ! (node.isSelected());
node.setSelected(isSelected);
if (node.getSelectionMode() == CheckNode.DIG_IN_SELECTION) {
if ( isSelected) {
tree.expandPath(path);
} else {
tree.collapsePath(path);
}
}
((DefaultTreeModel) tree.getModel()).nodeChanged(node);
// I need revalidate if node is root. but why?
if (row == 0) {
tree.revalidate();
tree.repaint();
}
}
}
} class ModePanel extends JPanel implements ActionListener {
CheckNode[] nodes;
JRadioButton b_single, b_dig_in;
ModePanel(CheckNode[] nodes) {
this.nodes = nodes;
setLayout(new GridLayout(2, 1));
setBorder(new TitledBorder("Check Mode"));
ButtonGroup group = new ButtonGroup();
add(b_dig_in = new JRadioButton("DIG_IN "));
add(b_single = new JRadioButton("SINGLE "));
group.add(b_dig_in);
group.add(b_single);
b_dig_in.addActionListener(this);
b_single.addActionListener(this);
b_dig_in.setSelected(true);
} public void actionPerformed(ActionEvent e) {
int mode;
if (b_single == e.getSource()) {
mode = CheckNode.SINGLE_SELECTION;
} else {
mode = CheckNode.DIG_IN_SELECTION;
}
for (int i = 0; i < nodes.length; i++) {
nodes[i].setSelectionMode(mode);
}
}
} class ButtonActionListener implements ActionListener {
CheckNode root; JTextArea textArea; ButtonActionListener(final CheckNode root, final JTextArea textArea) {
this.root = root;
this.textArea = textArea;
} public void actionPerformed(ActionEvent ev) {
Enumeration e = root.breadthFirstEnumeration();
while (e.hasMoreElements()) {
CheckNode node = (CheckNode) e.nextElement();
if (node.isSelected()) {
TreeNode[] nodes = node.getPath();
textArea.append("\n" + nodes[0].toString());
for (int i = 1; i < nodes.length; i++) {
textArea.append("/" + nodes[i].toString());
}
}
}
}
} public static void main(String args[]) {
CheckNodeTreeExample frame = new CheckNodeTreeExample();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setSize(300, 200);
frame.setVisible(true);
}
}class CheckRenderer extends JPanel implements TreeCellRenderer {
protected JTextField check;
protected TreeLabel label; public CheckRenderer() {
setLayout(null);
add(check = new JTextField());
add(label = new TreeLabel());
check.setBackground(UIManager.getColor("Tree.textBackground"));
label.setForeground(UIManager.getColor("Tree.textForeground"));
} public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean isSelected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
String stringValue = tree.convertValueToText(value, isSelected,
expanded, leaf, row, hasFocus);
setEnabled(tree.isEnabled());
check.setEditable(true);
label.setFont(tree.getFont());
label.setText(stringValue);
label.setSelected(isSelected);
label.setFocus(hasFocus);
if (leaf) {
label.setIcon(UIManager.getIcon("Tree.leafIcon"));
} else if (expanded) {
label.setIcon(UIManager.getIcon("Tree.openIcon"));
} else {
label.setIcon(UIManager.getIcon("Tree.closedIcon"));
}
return this;
} public Dimension getPreferredSize() {
Dimension d_label = label.getPreferredSize();
check.setPreferredSize(new Dimension(d_label.height*2, d_label.height));
Dimension d_check = check.getPreferredSize();
return new Dimension(d_check.width + d_label.width,
(d_check.height < d_label.height ? d_label.height
: d_check.height));
} public void doLayout() {
//check.setPreferredSize(new Dimension(40, 20));
Dimension d_check = check.getPreferredSize();
Dimension d_label = label.getPreferredSize();
int y_check = 0;
int y_label = 0;
check.setBounds(0, y_check, d_label.height*2, d_label.height);
//label.setLocation(d_check.width, y_label);
label.setBounds(d_check.width, y_label, d_label.width, d_label.height);
} public void setBackground(Color color) {
if (color instanceof ColorUIResource)
color = null;
super.setBackground(color);
} public class TreeLabel extends JLabel {
boolean isSelected;
boolean hasFocus; public TreeLabel() {
} public void setBackground(Color color) {
if (color instanceof ColorUIResource)
color = null;
super.setBackground(color);
} public void paint(Graphics g) {
String str;
if ((str = getText()) != null) {
if (0 < str.length()) {
if (isSelected) {
g.setColor(UIManager
.getColor("Tree.selectionBackground"));
} else {
g.setColor(UIManager.getColor("Tree.textBackground"));
}
Dimension d = getPreferredSize();
int imageOffset = 0;
Icon currentI = getIcon();
if (currentI != null) {
imageOffset = currentI.getIconWidth()
+ Math.max(0, getIconTextGap() - 1);
}
g.fillRect(imageOffset, 0, d.width - 1 - imageOffset,
d.height);
if (hasFocus) {
g.setColor(UIManager
.getColor("Tree.selectionBorderColor"));
g.drawRect(imageOffset, 0, d.width - 1 - imageOffset,
d.height - 1);
}
}
}
super.paint(g);
} public Dimension getPreferredSize() {
Dimension retDimension = super.getPreferredSize();
if (retDimension != null) {
retDimension = new Dimension(retDimension.width + 3,
retDimension.height);
}
return retDimension;
} public void setSelected(boolean isSelected) {
this.isSelected = isSelected;
} public void setFocus(boolean hasFocus) {
this.hasFocus = hasFocus;
}
}
}class CheckNode extends DefaultMutableTreeNode { public final static int SINGLE_SELECTION = 0; public final static int DIG_IN_SELECTION = 4; protected int selectionMode; protected boolean isSelected; public CheckNode() {
this(null);
} public CheckNode(Object userObject) {
this(userObject, true, false);
} public CheckNode(Object userObject, boolean allowsChildren,
boolean isSelected) {
super(userObject, allowsChildren);
this.isSelected = isSelected;
setSelectionMode(DIG_IN_SELECTION);
} public void setSelectionMode(int mode) {
selectionMode = mode;
} public int getSelectionMode() {
return selectionMode;
} public void setSelected(boolean isSelected) {
this.isSelected = isSelected; if ((selectionMode == DIG_IN_SELECTION) && (children != null)) {
Enumeration e = children.elements();
while (e.hasMoreElements()) {
CheckNode node = (CheckNode) e.nextElement();
node.setSelected(isSelected);
}
}
} public boolean isSelected() {
return isSelected;
}
}
class NodeSelectionListener extends MouseAdapter {
JTree tree;
NodeSelectionListener(JTree tree) {
this.tree = tree;
}
public void mouseClicked(MouseEvent e) {
int x = e.getX();
int y = e.getY();
int row = tree.getRowForLocation(x, y);
TreePath path = tree.getPathForRow(row);
//TreePath path = tree.getSelectionPath();
if (path != null) {
CheckNode node = (CheckNode)path.getLastPathComponent();
boolean isSelected = ! (node.isSelected());
node.setSelected(isSelected);
if (node.getSelectionMode() == CheckNode.DIG_IN_SELECTION) {
if ( isSelected) {
tree.expandPath(path);
} else {
tree.collapsePath(path);
}
}
((DefaultTreeModel) tree.getModel()).nodeChanged(node);
// I need revalidate if node is root. but why?
if (row == 0) {
tree.revalidate();
tree.repaint();
}
}
}
}呃,不懂。帮忙顶下。
这段代码实现了什么功能呀?