我想动态地在java中的每个jlist
项目中添加jPanel
。其中jPanel
包含一个按钮和进度条和标签。并且jlist
在jlist
中的每个元组中包含jpanel
。如何在java中的每个jList项目中添加Jpanel
回答
JList不能保存组件,而只能保存组件的效果图。所以简而言之,你的请求不是直接可能的。 但是,你可以用一个JTable来保存JButton和JProgressBar和JLabel的可编辑渲染。与JTable最大的区别在于它的单元格是可编辑的,所以这个按钮可以在这个环境中“工作”。
您可以通过查看链接到秋千教程和其他Swing资源在这里找到更多:Swing Info
示例代码:
- 注意,这里使用罗布Camicker的令人惊讶的精彩ButtonColumn。文章可以找到here,代码可以找到here。
- 这也从mKorbel的StackOverflow的答案代码here
- 除了TrashGod的代码借用发现here
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
import javax.swing.event.SwingPropertyChangeSupport;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
@SuppressWarnings("serial")
public class ComplexTableEg extends JPanel {
private CTTableModel tableModel = new CTTableModel();
private JTable table = new JTable(tableModel);
public ComplexTableEg() {
StartProgressAction startProgressAction = new StartProgressAction(
"Start Progress", KeyEvent.VK_S);
new ButtonColumn(table, startProgressAction, 0);
table.getColumnModel().getColumn(2).setCellRenderer(new ProgressRenderer());
JPanel buttonPanel = new JPanel();
buttonPanel.add(new JButton(new AddRowAction("Add Row", KeyEvent.VK_A)));
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
add(buttonPanel, BorderLayout.PAGE_END);
}
private class AddRowAction extends AbstractAction {
public AddRowAction(String name, int mnemonic) {
super(name);
putValue(MNEMONIC_KEY, mnemonic);
}
@Override
public void actionPerformed(ActionEvent e) {
int rowCount = tableModel.getRowCount() + 1;
CTRowData ctRow = new CTRowData("Row " + rowCount);
tableModel.addRow(ctRow);
}
}
private static void createAndShowGui() {
ComplexTableEg mainPanel = new ComplexTableEg();
JFrame frame = new JFrame("Complex Table Eg");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
/**
* From mKorbel's StackOverflow answer
* @link: https://stackoverflow.com/a/7036206/522444
*
*/
class ProgressRenderer extends DefaultTableCellRenderer {
private final JProgressBar b = new JProgressBar(0, 100);
public ProgressRenderer() {
super();
setOpaque(true);
b.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Integer i = (Integer) value;
String text = "Completed";
if (i < 0) {
text = "Error";
} else if (i < 100) {
b.setValue(i);
return b;
}
super.getTableCellRendererComponent(table, text, isSelected, hasFocus, row, column);
return this;
}
}
@SuppressWarnings("serial")
class StartProgressAction extends AbstractAction {
public StartProgressAction(String name, int mnemonic) {
super(name);
putValue(MNEMONIC_KEY, mnemonic);
}
@Override
public void actionPerformed(ActionEvent e) {
JTable table = (JTable) e.getSource();
int rowIndex = Integer.parseInt(e.getActionCommand());
CTTableModel model = (CTTableModel) table.getModel();
CTRowData row = model.getRow(rowIndex);
row.startProcessing();
}
}
@SuppressWarnings("serial")
class CTTableModel extends AbstractTableModel {
public static final String[] COLUMN_HEADERS = { "Button", "Label",
"Progress" };
private List<CTRowData> dataList = new ArrayList<>();
@Override
public int getRowCount() {
return dataList.size();
}
public CTRowData getRow(int rowIndex) {
return dataList.get(rowIndex);
}
@Override
public int getColumnCount() {
return COLUMN_HEADERS.length;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
CTRowData row = dataList.get(rowIndex);
switch (columnIndex) {
case 0:
return CTRowData.START_PROCESSING;
case 1:
return row.getText();
case 2:
return row.getValue();
}
return null;
}
@Override
public Class<?> getColumnClass(int columnIndex) {
switch (columnIndex) {
case 0:
return String.class;
case 1:
return String.class;
case 2:
return Integer.class;
}
// should never need this default
return super.getColumnClass(columnIndex);
}
@Override
public String getColumnName(int column) {
return COLUMN_HEADERS[column];
}
public void addRow(CTRowData row) {
dataList.add(row);
int firstRow = dataList.size() - 1;
fireTableRowsInserted(firstRow, firstRow);
row.addPropertyChangeListener(new RowDataListener(firstRow));
}
private class RowDataListener implements PropertyChangeListener {
private int row;
public RowDataListener(int row) {
this.row = row;
}
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (CTRowData.VALUE.equals(evt.getPropertyName())) {
fireTableCellUpdated(row, 2);
}
}
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
boolean cellEditable = false;
if (columnIndex != 0) {
cellEditable = false;
} else {
cellEditable = true;
}
return cellEditable;
}
}
class CTRowData {
public static final String VALUE = "value";
public static final String PROCESSING = "processing";
public static final String START_PROCESSING = "Start Processing";
private static final int TIMER_DELAY = 500;
public static final int MAX_VALUE = 100;
private String text;
private boolean processing = false;
private int value = 0;
private Random random = new Random();
private SwingPropertyChangeSupport pcSupport = new SwingPropertyChangeSupport(
this);
public CTRowData(String text) {
this.text = text;
}
public boolean isProcessing() {
return processing;
}
public void setProcessing(boolean processing) {
boolean oldValue = this.processing;
boolean newValue = processing;
this.processing = processing;
pcSupport.firePropertyChange(PROCESSING, oldValue, newValue);
}
public void startProcessing() {
if (processing) {
return;
}
setProcessing(true);
setValue(0);
new Timer(TIMER_DELAY, new TimerListener()).start();
}
public String getText() {
return text;
}
public int getValue() {
return value;
}
public void setValue(int value) {
int oldValue = this.value;
int newValue = value;
this.value = value;
pcSupport.firePropertyChange(VALUE, oldValue, newValue);
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcSupport.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcSupport.removePropertyChangeListener(listener);
}
private class TimerListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
int temp = value;
temp += 5 + random.nextInt(10);
temp = Math.min(temp, MAX_VALUE);
setValue(temp);
if (temp >= MAX_VALUE) {
((Timer) e.getSource()).stop();
setProcessing(false);
}
}
}
}
那么,如果你编写一个自定义的'ListCellRenderer',它是_is_可能的:http://docs.oracle.com/javase/tutorial/uiswing/components/list.html#renderer。 –
@dudeprgm:除了创建一个*响应*按钮之外,大部分都是可能的。同样,这也是JTable与JList不同的地方。它不仅可以显示多列渲染,其中JList只能显示一列,还可以使其单元格可编辑,从而使渲染的按钮起作用。 –
@dudeprgm:请参阅上面的示例程序。如果您可以使用JList和自定义的ListCellRenderer来复制此内容,请这样做,在此发布您的答案,向我发表评论以通知我,然后让我投票给它。 –
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