[英]JTextField in JTree - make it editable
有人有帶有復選框和文本字段的樹的示例代碼嗎? 因為現在我有一個代碼用於基於復選框的樹(僅)。 我還嘗試在樹中實現文本字段(使用Jlabels
)。 但是我被困住了,我真的很困惑。 我再無所求,希望您能幫助我。
問題是。 我無法修改JTextFields的文本。 修改不會保存。 而且我不知道如何在JTextField
的同一行中添加JLabel
Root
|
|- Node 1
| - [-] Activate simulation
| - [100] Iterations
|- Node 2
| - [x] Activate simulation
| - [2000] Iterations
package view;
import javax.swing.BoxLayout;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JTextField;
import org.jdesktop.swingx.JXTreeTable;
import org.jdesktop.swingx.treetable.AbstractTreeTableModel;
import org.jdesktop.swingx.treetable.DefaultMutableTreeTableNode;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.event.DocumentListener;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.AbstractCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.DocumentEvent;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
public class test {
private Document dom;
private void parseXmlFile(String xmlpath){
//get the factory
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
//Using factory get an instance of document builder
DocumentBuilder db = dbf.newDocumentBuilder();
//parse using builder to get DOM representation of the XML file
dom = db.parse(xmlpath);
}catch(ParserConfigurationException pce) {
pce.printStackTrace();
}catch(SAXException se) {
se.printStackTrace();
}catch(IOException ioe) {
ioe.printStackTrace();
}
}
public static void main(String args[]) {
JFrame frame = new JFrame("CheckBox Tree");
CheckBoxNode accessibilityOptions[] = {
new CheckBoxNode(
"Move system caret with focus/selection changes", false),
new CheckBoxNode("Always expand alt text for images", true) };
CheckBoxNode browsingOptions[] = {
new CheckBoxNode("Notify when downloads complete", true),
new CheckBoxNode("Disable script debugging", true),
new CheckBoxNode("Use AutoComplete", true),
new CheckBoxNode("Browse in a new process", false)
};
TextBoxNode loloptions[] =
{
new TextBoxNode("oha", "lol"),
new TextBoxNode("oha1", "lol"),
new TextBoxNode("oha2", "lol")
};
Vector accessVector = new NamedVector("Accessibility",
accessibilityOptions);
Vector browseVector = new NamedVector("Browsing", browsingOptions);
Vector browse1Vector = new NamedVector("Browsing", browsingOptions);
Vector browse2Vector = new NamedVector("textboxnodes", loloptions);
Object lolNodes[] = {browse1Vector, browseVector, browse2Vector};
Vector lolvec = new NamedVector("Overking", lolNodes);
Object rootNodes[] = { accessVector, lolvec};
lolvec.add(new CheckBoxNode("oh",false));
Vector rootVector = new NamedVector("Root", rootNodes);
JTree tree = new JTree(rootVector);
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
tree.setCellRenderer(renderer);
tree.setCellEditor(new CheckBoxNodeEditor(tree));
tree.setEditable(true);
for (int i = 0; i < tree.getRowCount(); i++) {
tree.expandRow(i);
}
JScrollPane scrollPane = new JScrollPane(tree);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class CheckBoxNodeRenderer implements TreeCellRenderer {
private JCheckBox leafRenderer = new JCheckBox();
private JTextField leafRendererAlt = new JTextField();
private DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();
Color selectionBorderColor, selectionForeground, selectionBackground,
textForeground, textBackground;
protected Object getLeafRenderer() {
if(leafRenderer.getText().length() > 0)
return leafRenderer;
else
return leafRendererAlt;
}
public CheckBoxNodeRenderer() {
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
leafRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager
.get("Tree.drawsFocusBorderAroundIcon");
leafRenderer.setFocusPainted((booleanValue != null)
&& (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForeground = UIManager.getColor("Tree.selectionForeground");
selectionBackground = UIManager.getColor("Tree.selectionBackground");
textForeground = UIManager.getColor("Tree.textForeground");
textBackground = UIManager.getColor("Tree.textBackground");
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
Component returnValue;
if (leaf) {
String stringValue = tree.convertValueToText(value, selected,
expanded, leaf, row, false);
if(stringValue.contains("TextBoxNode"))
{
leafRenderer = new JCheckBox();
leafRendererAlt.setText(stringValue);
//leafRendererAlt.setValue(value);
leafRendererAlt.setEnabled(tree.isEnabled());
if (selected) {
leafRendererAlt.setForeground(selectionForeground);
leafRendererAlt.setBackground(selectionBackground);
} else {
leafRendererAlt.setForeground(textForeground);
leafRendererAlt.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value)
.getUserObject();
if (userObject instanceof TextBoxNode) {
TextBoxNode node = (TextBoxNode) userObject;
leafRendererAlt.setText(node.getText());
}
}
returnValue = leafRendererAlt;
}
else
{
leafRendererAlt = new JTextField();
leafRenderer.setText(stringValue);
leafRenderer.setSelected(false);
leafRenderer.setEnabled(tree.isEnabled());
if (selected) {
leafRenderer.setForeground(selectionForeground);
leafRenderer.setBackground(selectionBackground);
} else {
leafRenderer.setForeground(textForeground);
leafRenderer.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value)
.getUserObject();
if (userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode) userObject;
leafRenderer.setText(node.getText());
leafRenderer.setSelected(node.isSelected());
}
}
returnValue = leafRenderer;
}
} else {
returnValue = nonLeafRenderer.getTreeCellRendererComponent(tree,
value, selected, expanded, leaf, row, hasFocus);
}
return returnValue;
}
}
class CheckBoxNodeEditor extends AbstractCellEditor implements TreeCellEditor {
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
ChangeEvent changeEvent = null;
JTree tree;
public CheckBoxNodeEditor(JTree tree) {
this.tree = tree;
}
public Object getCellEditorValue() {
JCheckBox checkbox;
JTextField textfield;
CheckBoxNode checkBoxNode;
TextBoxNode txtBoxNode;
if(renderer.getLeafRenderer() instanceof JCheckBox)
{
checkbox = (JCheckBox) renderer.getLeafRenderer();
checkBoxNode = new CheckBoxNode(checkbox.getText(),
checkbox.isSelected());
return checkBoxNode;
}
else
{
textfield = (JTextField) renderer.getLeafRenderer();
String txt = textfield.getText();
txtBoxNode = new TextBoxNode(txt, txt);
return txtBoxNode;
}
}
public boolean isCellEditable(EventObject event) {
boolean returnValue = false;
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
TreePath path = tree.getPathForLocation(mouseEvent.getX(),
mouseEvent.getY());
if (path != null) {
Object node = path.getLastPathComponent();
if ((node != null) && (node instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
Object userObject = treeNode.getUserObject();
if((userObject instanceof TextBoxNode) || (userObject instanceof CheckBoxNode))
returnValue = treeNode.isLeaf();
}
}
}
return returnValue;
}
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row) {
Component editor = renderer.getTreeCellRendererComponent(tree, value,
true, expanded, leaf, row, true);
// editor always selected / focused
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
if (stopCellEditing()) {
fireEditingStopped();
}
}
};
DocumentListener doclistener = new DocumentListener(){
public void changedUpdate(DocumentEvent e) {
System.out.print(e);
}
@Override
public void insertUpdate(DocumentEvent arg0) {
// TODO Auto-generated method stub
javax.swing.text.Document test = arg0.getDocument();
System.out.print(arg0);
fireEditingStopped();
}
@Override
public void removeUpdate(DocumentEvent arg0) {
// TODO Auto-generated method stub
System.out.print(arg0);
}
};
if (editor instanceof JCheckBox) {
((JCheckBox) editor).addItemListener(itemListener);
}
else if (editor instanceof JTextField)
{
((JTextField) editor).getDocument().addDocumentListener(doclistener);
}
return editor;
}
}
class CheckBoxNode {
String text;
boolean selected;
public CheckBoxNode(String text, boolean selected) {
this.text = text;
this.selected = selected;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean newValue) {
selected = newValue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
public String toString() {
return getClass().getName() + "[" + text + "/" + selected + "]";
}
}
class TextBoxNode{
String text;
String value;
public TextBoxNode(String text, String value) {
this.text = text;
this.value = value;
}
public String getValue() {
return value;
}
public void setValue(String newvalue) {
value = newvalue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
public String toString() {
return getClass().getName() + "[" + text + "/" + value + "]";
}
}
class NamedVector extends Vector {
String name;
public NamedVector(String name) {
this.name = name;
}
public NamedVector(String name, Object elements[]) {
this.name = name;
for (int i = 0, n = elements.length; i < n; i++) {
add(elements[i]);
}
}
public String toString() {
return "[" + name + "]";
}
}
問題是。 我無法修改JTextFields
的文本。 而且我不知道如何在JTextField
的同一行中添加JLabel
我希望你能幫助我。
原則上,您應該徹底分離渲染器和編輯器。 在您的情況下,它們緊密地聯系在一起(實際上,編輯器返回渲染器的JTextField實例)...渲染器不應被編輯。 在您的情況下,我懷疑是否曾召集過編輯。
我看到兩種可能的解決方案:
JLabel
渲染和使用JTextField
編輯-或僅使用DefaultTreeCellEditor
示例在此處 )。 讓樹確定何時開始編輯,何時調用編輯器,何時取消編輯等... TreeCellEditor
,然后讓渲染器完成所有工作。 將適當的偵聽器添加到渲染器內的JTextField
和JCheckBox
,並在進行更改時更新模型。 (請注意,一個缺點是您將擁有原始的編輯機制:例如,如果用戶按下ESC,則不會取消編輯)。 關於:
而且我不知道如何在JTextField的同一行中添加JLabel
只需讓您的渲染器返回一個JPanel
即可,並在其中添加JTextField
和JLabel
。
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