哪个Swing布局管理器可以获取我想要的布局? [英] Which Swing layout manager to get my desired layout?

问题描述

在此模拟之后，我试图制作一个基本的登录菜单:

I am trying to make a basic login menu following this mock up :

我决定将整个菜单放入一个JPanel中，以便在连接成功后可以切换到另一个面板.

I decided to put this whole menu into a JPanel so I can switch to another panel once the connexion is successful.

因此，我决定使用Borderlayout在北部区域使用标题，在南部区域使用连接按钮.

So I decided to use a Borderlayout to have the title in north area and the connect button in the south area .

我将边框布局的中心设置为面板本身.我决定使其既具有标签(登录名，密码)又具有用户将其ID放在其中的文本字段的网格布局.

I made the center of the borderlayout a panel itself . I decided to make it a gridlayout to both have the labels(login,password) but also the textfield in which the user will put his id.

结果非常丑陋，与我的预期相去甚远:

The result is very ugly and very far from what I expected :

这是菜单的代码:

public class EcranAccueil extends JPanel {    
    private JLabel labelTitre;
    private JPanel PanelConnexion;
    private JButton boutonConnexion;     
    private JLabel labelLogin;
    private JLabel labelMotDepasse;
    private JTextField loginUser;
    private JTextField MotDepasseUser;

     EcranAccueil(EcranGestion EcranPrincipale){
            PanelConnexion = new JPanel();     
            this.setLayout(new BorderLayout());
            PanelConnexion.setLayout(new GridLayout(2,2));
            loginUser = new JTextField("User");
            loginUser.setMinimumSize(new Dimension(20,20));
            loginUser.setMaximumSize(new Dimension(20,20));
            MotDepasseUser = new JTextField("Password");
            boutonConnexion = new JButton("Connect");
            boutonConnexion.setMinimumSize(new Dimension(200,200));
            boutonConnexion.setMaximumSize(new Dimension(200,200));
            labelTitre=  new JLabel("ApplicationName");
            labelLogin=  new JLabel("Login");
            labelMotDepasse =  new JLabel("Password");          
            PanelConnexion.add(labelLogin);
            PanelConnexion.add(loginUser);
            PanelConnexion.add(labelMotDepasse);
            PanelConnexion.add(MotDepasseUser);
            this.add(labelTitre, BorderLayout.NORTH);
            this.add(PanelConnexion, BorderLayout.CENTER);       
            this.add(boutonConnexion, BorderLayout.SOUTH);
            }     }

我尝试使用gridboxlayout，但是我完全无法使用它，并且无法编译.有人有建议或建议吗?

I tried to use a gridboxlayout but I completely failed at using it and it did not compile. Does anyone have advices or suggestion?

推荐答案

解决复杂计算任务的常用策略是将它们分解为细小，定义明确的可管理任务.分而治之. 这也适用于gui:将设计分为较小的，易于布局的容器. 在这种情况下，例如，首先将设计分为三个区域:

A common strategy to solve complex computing tasks, is to break them into small, well defined manageable tasks. Divide and conquer. This also applies to gui: break the design into small, easy to layout containers. In this case, for example start by dividing the design into 3 areas:

每个这样的区域都是由嵌套面板实现的. 如您在代码中所见，mainPanel被进一步分为两个嵌套面板，以简化和改善布局:

Each such area is implemented by a nested panel. As you can see in the code, mainPanel is further divided into two nested panels, to ease and improve layout:

class EcranAccueil extends JPanel {

    EcranAccueil(){
        //Set layout (JPanel uses Flowlayout by default)
        setLayout(new BorderLayout(5,5));

        // a nested panel for application label
        JPanel topPanel = new JPanel();
        add(topPanel, BorderLayout.NORTH);
        topPanel.setLayout(new FlowLayout(FlowLayout.LEADING));//set

        JLabel labelTitre=  new JLabel("ApplicationName");
        topPanel.add(labelTitre);

        // a nested panel for login and password, having two rows
        JPanel mainPanel = new JPanel(new GridLayout(2, 1));
        add(mainPanel, BorderLayout.CENTER);

        JPanel loginPanel = new JPanel();
        loginPanel.setLayout(new FlowLayout(FlowLayout.TRAILING));
        mainPanel.add(loginPanel);

        JLabel labelLogin = new JLabel("Login");
        loginPanel.add(labelLogin);

        JTextField loginUser = new JTextField("User");
        loginUser.setColumns(10);
        loginPanel.add(loginUser);

        JPanel passwordPanel = new JPanel();
        passwordPanel.setLayout(new FlowLayout(FlowLayout.TRAILING));
        mainPanel.add(passwordPanel);
        JLabel labelMotDepasse = new JLabel("Password");
        passwordPanel.add(labelMotDepasse);
        JTextField motDepasseUser = new JTextField("Password");
        motDepasseUser.setColumns(10);
        passwordPanel.add(motDepasseUser);

        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
        add(buttonPanel,BorderLayout.SOUTH);
        JButton boutonConnexion = new JButton("Connect");
        buttonPanel.add(boutonConnexion);
    }
}

一旦您掌握了基本概念，就可以进一步改善布局及其响应能力.

Once you get the basic idea, the layout and its responsiveness can be further improved.

更多应用此策略的示例: 1 3

More examples of applying this strategy: 1 2 and 3

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