如何在swing中实现动态GUI

Question

首先,抱歉发布一些可能有点过于具体的内容,但我对Swing不是很有经验,似乎无法找到符合我需求的好例子.

所以我试图找出实现动态GUI的最佳方法,以便在Swing中选择过滤条件:

底层模型是一个类,其中包含可以否定的标准列表(即应用NOT前缀),以及指示这些标准是否应与AND或OR组合的属性.

GUI将允许用户添加,更改或删除标准,并选择组合运算符(和/或).第一个标准自然没有组合选择器,第三个和后续标准将简单地使用与第二个标准相同的组合运算符.

右侧的X按钮将用于删除标准.按下"添加"按钮后,将在底部添加一个新的组件行.随着更改,这些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实现"原始",但我更喜欢更简洁的解决方案,例如TableModel提供的解决方案.

所以我想知道一个带有自定义TableModel和TableCellRenderer/Editor的表是否是最好的方法,或者是否有更好的方法来实现这样的东西.如果table确实是最好的方法,我会很感激指出如何使用TableCellRenderers或-Editors来实现这一目标.

提前致谢.

Answer 1

唯一的例子,一切都是硬编码,以便更好地理解

编辑:

正如kleopatra注意到的那样,将JTable#fireTableDataChanged()从ActionListener移到了TableModel,修改了所有ClassNames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());
    }
}