这个问题的答案Swing: how to get container bind to JRadioButton? 让我想到了一个简单的应用程序设计中的 MVC。我描述了一个应用程序的总体思路以及我对这种情况下的 MVC 模式的看法。
小应用说明：
这个应用程序允许用户添加由名称和描述组成的简单记录。按下“添加”按钮后，它们将作为两个标签和单选按钮添加到面板中，以便编辑记录。用户可以将他的列表保存在配置文件中（序列化为 xml、属性或其他位置）。
我对如何在这里应用 MVC 的想法：
模型
带有名称和描述字段的记录
具有序列化机制的配置文件
看法
- 包含多个面板（记录列表）的面板 - 每个记录一个（单选按钮 + 2 个用于名称和描述数据的标签）
控制器
2 个带有标签的文本框和一个添加记录的按钮
用于编辑记录的按钮
目前没有代码示例（稍后我会提供它们）。我不想着急，我想了解我是否朝着正确的 MVC 方向前进，或者在实施之前应该改变什么。
更新
代码示例
*MainClass*:
public class RecordsControl extends JFrame {
private RecordsModel model;
private RecordsController controller;
private RecordsControlView view;
public RecordsControl() {
super("Records Control");
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
initMVC();
getContentPane().add(view);
pack();
setMinimumSize(new Dimension(250, 500));
setLocationRelativeTo(null);
setResizable(false);
setVisible(true);
}
private void initMVC() {
model = new RecordsModel();
view = new RecordsControlView(controller);
controller = new RecordsController(model, view);
}
}
*Model*:
public class RecordsModel {
//Record class has only two fields String::name and String::description
private List<Record> RecordsList;
public RecordsModel() {
RecordsList = new ArrayList<Record>();
}
public void addRecord(String name, String description) {
RecordsList.add(new Record(name, description));
}
public List<Record> getRecordsList() {
return RecordsList;
}
}
*View*:
public class RecordsControlView extends JPanel {
private final RecordsController controller;
private JLabel nameLabel;
private JLabel descrLabel;
private JTextField nameField;
private JTextField descrField;
private JButton addButton;
private JButton editButton;
private JButton deleteButton;
private JPanel recordsListPanel;
public RecordsControlView(RecordsController controller) {
super();
this.controller = controller;
achievNameLabel = new JLabel("Name: ");
achievDescrLabel = new JLabel("Description: ");
achievNameField = new JTextField(15);
achievDescrField = new JTextField(15);
addButton = new JButton("Add");
initGUI();
initListeners();
}
private void initListeners() {
addButton.addActionListener(controller);
}
private void initGUI() {
//Main Panel
this.setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
//name panel
//...BoxLayout label + panel
//description panel
//...BoxLayout label + panel
//Records list Panel
//...Vertical BoxLayout
//Add widgets to GridBagLayout
//Name panel
constraints.gridx = 0;
constraints.gridy = 0;
constraints.insets = new Insets(5, 5, 2, 2);
add(namePanel, constraints);
//Description Panel
constraints.gridx = 0;
constraints.gridy = 1;
constraints.insets = new Insets(0, 5, 5, 2);
add(descrPanel, constraints);
//Add button
constraints.gridx = 1;
constraints.gridy = 0;
constraints.gridheight = 2;
constraints.gridwidth = 1;
constraints.insets = new Insets(5, 0, 5, 5);
constraints.fill = GridBagConstraints.VERTICAL;
add(addButton, constraints);
//Records List panel
constraints.gridx = 0;
constraints.gridy = 2;
constraints.gridwidth = GridBagConstraints.REMAINDER;
constraints.gridheight = GridBagConstraints.REMAINDER;
constraints.fill = GridBagConstraints.BOTH;
constraints.insets = new Insets(0, 5, 5, 5);
add(recordsListPanel, constraints);
}
public JButton getAddButton() {
return addButton;
}
public void addRecord(JPanel record) {
recordsListPanel.add(record);
}
}
public class RecordsView extends JPanel {
private static ButtonGroup radioButtons = new ButtonGroup();
private JRadioButton radioButton;
private JLabel name;
private JLabel description;
public RecordsView() {
super();
radioButton = new JRadioButton();
name = new JLabel();
description = new JLabel();
initGUI();
}
private void initGUI() {
radioButtons.add(radioButton);
setLayout(new GridBagLayout());
GridBagConstraints constraints = new GridBagConstraints();
constraints.gridx = 0;
constraints.gridy = 0;
add(radioButton, constraints);
constraints.gridx = 1;
constraints.gridy = 0;
constraints.weightx = 1.0;
constraints.fill = GridBagConstraints.HORIZONTAL;
add(name, constraints);
constraints.gridx = 1;
constraints.gridy = 1;
constraints.weightx = 1.0;
constraints.fill = GridBagConstraints.HORIZONTAL;
add(description, constraints);
}
*Controller*:
public class RecordsController implements ActionListener{
private final RecordsModel model;
private final RecordsControlView view;
public RecordsController(RecordsModel model, RecordsControlView view) {
this.model = model;
this.view = view;
}
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource() == view.getAddButton()) {
RecordsView record = new RecordsView();
view.add(record);
view.updateUI();
}
}
}