Java 如何使JTable列不包含JTextFields,而是包含JTextAreas?
请告诉我,如何制作包含JTextAreas的JTable列, 因此,当用户键入大量文本和内容时,单元格的高度将增加Java 如何使JTable列不包含JTextFields,而是包含JTextAreas?,java,swing,jtable,textarea,awt,Java,Swing,Jtable,Textarea,Awt,请告诉我,如何制作包含JTextAreas的JTable列, 因此,当用户键入大量文本和内容时,单元格的高度将增加 我们可以看到多行(单元格被展开;因此,行也会展开)您需要基于JTextArea编写自己的单元格渲染器和编辑器: public class Start { public static class JTextPaneCellEditor extends AbstractCellEditor implements TableCellEditor, KeyListener
我们可以看到多行(单元格被展开;因此,行也会展开)您需要基于JTextArea编写自己的单元格渲染器和编辑器:
public class Start
{
public static class JTextPaneCellEditor extends AbstractCellEditor implements TableCellEditor, KeyListener
{
private JViewport viewport;
private JTable table;
private int row;
private JTextPane pane;
public JTextPaneCellEditor(){
viewport = new JViewport();
pane = new JTextPane();
viewport.add(pane);
pane.addKeyListener(this);
}
@Override public Object getCellEditorValue(){
return pane.getText();
}
@Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column){
this.table = table;
this.row = row;
pane.setText(value.toString());
int newHeight = (int)pane.getPreferredSize().getHeight();
if(table.getRowHeight(row) < newHeight){
table.setRowHeight(row, newHeight);
}
return pane;
}
@Override public boolean isCellEditable(EventObject e){
if (e instanceof MouseEvent) {
return ((MouseEvent)e).getClickCount() >= 2;
}
return true;
}
@Override public void keyTyped(KeyEvent e){
table.setRowHeight(row, (int)pane.getPreferredSize().getHeight());
}
@Override public void keyPressed(KeyEvent e){
if(e.getKeyCode() == KeyEvent.VK_ENTER){
stopCellEditing();
}
}
@Override public void keyReleased(KeyEvent e){
}
}
private static class JTextPaneCellRenderer extends JViewport implements TableCellRenderer
{
JTextPane pane;
JTextPaneCellRenderer(){
pane = new JTextPane();
add(pane);
}
@Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column){
pane.setText(value.toString());
table.setRowHeight(row, (int)pane.getPreferredSize().getHeight());
return this;
}
}
public static void main(String[] args){
JTable table = new JTable(new String[][]{{"String String String String StringString String String String StringString String String String StringString String String String StringString String String String String"}, {"String 2"}}, new String[]{"Column"});
table.setDefaultRenderer(Object.class, new JTextPaneCellRenderer());
table.setDefaultEditor(Object.class, new JTextPaneCellEditor());
JFrame test = new JFrame();
test.add(new JScrollPane(table));
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
test.setSize(300, 300);
test.setLocationRelativeTo(null);
test.setVisible(true);
}
}
公共类启动
{
公共静态类JTextPaneCellEditor扩展AbstractCellEditor实现TableCellEditor、KeyListener
{
私有视口;
专用JTable表;
私人int row;
私人JTextPane;
公共JTextPaneCellEditor(){
viewport=newjviewport();
pane=新的JTextPane();
viewport.add(窗格);
pane.addKeyListener(这个);
}
@重写公共对象getCellEditorValue(){
return pane.getText();
}
@重写公共组件getTableCellEditorComponent(JTable表、对象值、布尔isSelected、int行、int列){
this.table=表格;
this.row=行;
setText(value.toString());
int newHeight=(int)pane.getPreferredSize().getHeight();
if(表.getRowHeight(行)=2;
}
返回true;
}
@重写公共void键类型(KeyEvent e){
table.setRowHeight(row,(int)窗格.getPreferredSize().getHeight());
}
@按下覆盖公共无效键(键事件e){
如果(例如getKeyCode()==KeyEvent.VK_ENTER){
stopCellEditing();
}
}
@覆盖公共无效密钥释放(密钥事件e){
}
}
私有静态类JTextPaneCellRenderer扩展了JViewport,实现了TableCellRenderer
{
JTextPane窗格;
JTextPaneCellRenderer(){
pane=新的JTextPane();
添加(窗格);
}
@重写公共组件GetTableCellRenderComponent(JTable表、对象值、布尔isSelected、布尔hasFocus、int行、int列){
setText(value.toString());
table.setRowHeight(row,(int)窗格.getPreferredSize().getHeight());
归还这个;
}
}
公共静态void main(字符串[]args){
JTable table=新JTable(新字符串[][{{“字符串”},{“字符串2”},新字符串[]{“列”});
setDefaultRenderer(Object.class,新的JTextPaneCellRenderer());
setDefaultEditor(Object.class,新的JTextPaneCellEditor());
JFrame测试=新JFrame();
添加(新的JScrollPane(表));
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
测试设置尺寸(300300);
test.setLocationRelativeTo(空);
test.setVisible(真);
}
}
编辑:添加视口以更好地调整大小。但在第一次编辑时该行仍然没有展开。有人有什么想法吗
编辑2:我同意这些评论。您想要的东西是可能的,但您需要未经测试的、黑客式的自定义实现。如果您重新设计布局以排除此类JTable巫术,您的境况会更好。@Jakub Zaverka
稍后我将删除此答案
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.text.*;
public class AutoWrapTest {
public JComponent makeUI() {
String[] columnNames = {"TextAreaCellRenderer"};
Object[][] data = {
{"123456789012345678901234567890"},
{"dddddddddddddddddddddddddddddddddddddddddddddddddddddddddx"},
{"----------------------------------------------0"},
{">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>|"},};
TableModel model = new DefaultTableModel(data, columnNames) {
private static final long serialVersionUID = 1L;
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
JTable table = new JTable(model) {
private static final long serialVersionUID = 1L;
@Override
public void doLayout() {
TableColumn col = getColumnModel().getColumn(0);
for (int row = 0; row < getRowCount(); row++) {
Component c = prepareRenderer(col.getCellRenderer(), row, 0);
if (c instanceof JTextArea) {
JTextArea a = (JTextArea) c;
int h = getPreferredHeight(a) + getIntercellSpacing().height;
if (getRowHeight(row) != h) {
setRowHeight(row, h);
}
}
}
super.doLayout();
} //http://tips4java.wordpress.com/2008/10/26/text-utilities/
private int getPreferredHeight(JTextComponent c) {
Insets insets = c.getInsets();
View view = c.getUI().getRootView(c).getView(0);
int preferredHeight = (int) view.getPreferredSpan(View.Y_AXIS);
return preferredHeight + insets.top + insets.bottom;
}
};
table.setEnabled(false);
table.setShowGrid(false);
table.setTableHeader(null);
table.getColumnModel().getColumn(0).setCellRenderer(new TextAreaCellRenderer());
JScrollPane sp = new JScrollPane(table);
sp.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
JPanel p = new JPanel(new BorderLayout());
p.add(sp);
return p;
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowGUI();
}
});
}
public static void createAndShowGUI() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new AutoWrapTest().makeUI());
f.setSize(200, 200);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
class TextAreaCellRenderer extends JTextArea implements TableCellRenderer {
private static final long serialVersionUID = 1L;
private final Color evenColor = new Color(230, 240, 255);
public TextAreaCellRenderer() {
super();
setLineWrap(true);
setWrapStyleWord(true);
setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
setBackground((row % 2 == 0) ? evenColor : getBackground());
}
setFont(table.getFont());
setText((value == null) ? "" : value.toString());
return this;
}
}
import java.awt.*;
导入javax.swing.*;
导入javax.swing.table.*;
导入javax.swing.text.*;
公共类自动包装{
公共JComponent makeUI(){
String[]columnNames={“TextAreaCellRenderer”};
对象[][]数据={
{"123456789012345678901234567890"},
{“ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddx”},
{"----------------------------------------------0"},
{">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>|"},};
TableModel model=新的DefaultTableModel(数据、列名){
私有静态最终长serialVersionUID=1L;
@凌驾
公共布尔值可编辑(int行,int列){
返回false;
}
};
JTable表格=新JTable(型号){
私有静态最终长serialVersionUID=1L;
@凌驾
公共空间布局(){
TableColumn col=getColumnModel().getColumn(0);
对于(int row=0;row