如何在Swing中实现动态GUI
首先，为发布一些过分具体的内容而道歉，但是我对Swing并不十分了解，并且似乎找不到适合我需求的好例子。
因此，我试图找出实现动态GUI以便在Swing中选择过滤条件的最佳方法：
要实现的GUI样机
基础模型是一个类，其中包含可否定（例如，使用NOT前缀）条件的列表，以及指示这些条件应与AND还是OR组合的属性。
GUI将允许用户添加，更改或删除条件，并选择组合运算符（和/或）。第一个条件自然不会具有组合选择器，而第三个条件和后续条件将仅使用与第二个条件相同的组合操作符。
右侧的X按钮将用于删除条件。当按下添加按钮时，新的组件行将被添加到底部。进行更改时，这些更改将反映在基础模型中。
当然，我可以通过简单地将组件添加到JPanel然后相应地更新模型来“非常原始地”实现此功能，但是我更喜欢更整洁的解决方案，例如TableModel提供的解决方案。
因此，我想知道带有自定义TableModel和TableCellRenderer / Editor的表是否是最佳方法，或者是否有更好的方法来实现类似的方法。如果table确实是最好的方法，我将对使用TableCellRenderers或-Editors如何完成此工作的一些指示表示赞赏。
提前致谢。
回答：
仅作为示例，所有内容都经过硬编码，以更好地理解
编辑：
正如kleopatra所注意到的那样，将JTable＃fireTableDataChanged（）从ActionListener移到了TableModel，修改了所有ClassName以lowerCase开头
`import java.awt.;
import java.awt.event.;
import java.util.EventObject;
import javax.swing.;
import javax.swing.table.;
public class ComponentTableTest {
private JFrame frame;private JTable CompTable = null;
private CompTableModel CompModel = null;
private JButton addButton = null;
public static void main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new ComponentTableTest().makeUI();
}
});
}
public void makeUI() {
CompTable = CreateCompTable();
JScrollPane CompTableScrollpane = new JScrollPane(CompTable, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
JPanel bottomPanel = CreateBottomPanel();
frame = new JFrame("Comp Table Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(CompTableScrollpane, BorderLayout.CENTER);
frame.add(bottomPanel, BorderLayout.SOUTH);
frame.setPreferredSize(new Dimension(800, 400));
frame.setLocation(150, 150);
frame.pack();
frame.setVisible(true);
}
public JTable CreateCompTable() {
CompModel = new CompTableModel();
CompModel.addRow();
JTable table = new JTable(CompModel);
table.setRowHeight(new CompCellPanel().getPreferredSize().height);
table.setTableHeader(null);
CompCellEditorRenderer compCellEditorRenderer = new CompCellEditorRenderer();
table.setDefaultRenderer(Object.class, compCellEditorRenderer);
table.setDefaultEditor(Object.class, compCellEditorRenderer);
return table;
}
public JPanel CreateBottomPanel() {
addButton = new JButton("Add Comp");
addButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if (source == addButton) {
CompModel.addRow();
//CompModel.fireTableDataChanged(); // moved to TableModel
}
}
});
JPanel panel = new JPanel(new GridBagLayout());
panel.add(addButton);
return panel;
}
}
class CompCellEditorRenderer extends AbstractCellEditor implements TableCellRenderer, TableCellEditor {
private static final long serialVersionUID = 1L;private CompCellPanel renderer = new CompCellPanel();
private CompCellPanel editor = new CompCellPanel();
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
renderer.setComp((Comp) value);
return renderer;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
editor.setComp((Comp) value);
return editor;
}
@Override
public Object getCellEditorValue() {
return editor.getComp();
}
@Override
public boolean isCellEditable(EventObject anEvent) {
return true;
}
@Override
public boolean shouldSelectCell(EventObject anEvent) {
return false;
}
}
class CompTableModel extends DefaultTableModel {
private static final long serialVersionUID = 1L;@Override
public int getColumnCount() {
return 1;
}
public void addRow() {
super.addRow(new Object[]{new Comp(0, 0, "", "")});
//super.fireTableDataChanged();
}
}
class Comp {
int type;int relation;
String lower;
String upper;
public Comp(int type, int relation, String lower, String upper) {
this.type = type;
this.relation = relation;
this.lower = lower;
this.upper = upper;
}
}
class CompCellPanel extends JPanel {
private static final long serialVersionUID = 1L;private JLabel labelWith = new JLabel("With ");
private JComboBox typeCombo = new JComboBox(new Object[]{"height", "length", "volume"});
private JComboBox relationCombo = new JComboBox(new Object[]{"above", "below", "between"});
private JTextField lowerField = new JTextField();
private JLabel labelAnd = new JLabel(" and ");
private JTextField upperField = new JTextField();
private JButton removeButton = new JButton("remove");
CompCellPanel() {
setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
relationCombo.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
enableUpper(relationCombo.getSelectedIndex() == 2);
}
});
enableUpper(false);
removeButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JTable table = (JTable) SwingUtilities.getAncestorOfClass(JTable.class, (Component) e.getSource());
int row = table.getEditingRow();
table.getCellEditor().stopCellEditing();
((DefaultTableModel) table.getModel()).removeRow(row);
}
});
add(labelWith);
add(typeCombo);
add(relationCombo);
add(lowerField);
add(labelAnd);
add(upperField);
add(Box.createHorizontalStrut(100));
add(removeButton);
}
private void enableUpper(boolean enable) {
labelAnd.setEnabled(enable);
upperField.setEnabled(enable);
}
public void setComp(Comp Comp) {
typeCombo.setSelectedIndex(Comp.type);
relationCombo.setSelectedIndex(Comp.relation);
lowerField.setText(Comp.lower);
upperField.setText(Comp.upper);
enableUpper(Comp.relation == 2);
}
public Comp getComp() {
return new Comp(typeCombo.getSelectedIndex(), relationCombo.getSelectedIndex(), lowerField.getText(), upperField.getText());
}
}`
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