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多個面板相互下方

[英]Multiple Panels Below Each Other

 原文  2012-11-16 11:26:48  8   3    java/ swing/ user-interface/ layout-manager/ gridbaglayout

問題描述

我可以有一個用於登錄的頂部面板嗎？ 然后是下面的中間和底部面板。 我正在使用 gridbaglayout 並分配了 2 個面板。 一個面板鏈接了用於登錄詳細信息的組件，另一個面板鏈接了其他組件。 但是，計划不會發生。 我試過使用 Box/Borderlayout 來做到這一點，但后來我無法創建我想要的間距。

這是我想要的草圖。

http://s16.postimage.org/dtefn48qd/16_11_2012_11_24_40.png

public class GUI extends JFrame{

    private JPanel myTopPL, myTopPL2;
    private JTextField myUsernameTF;
    private JTextField myPasswordTF;
    private JTextField myMessageTF;
    private JLabel myUsernameLBL;
    private JLabel myPasswordLBL;
    private JLabel myItemsLBL;
    private JTextArea myMainTA;
    private JButton myLoginBN;
    private JButton myConnectBN;
    private JButton mySendBN;
    private JComboBox myItemsCB;

    public GUI () {

        super("GUI ");

        setLayout(new GridBagLayout());
        myTopPL = new JPanel();
        myTopPL2 = new JPanel();
        myTopPL.setLayout(new GridBagLayout());
        myTopPL2.setLayout(new GridBagLayout());
        GridBagConstraints myTopPLGBC = new GridBagConstraints();
        myTopPLGBC.weightx = 1;
        myTopPLGBC.weighty = 1;
        GridBagConstraints myTopPLGBC2 = new GridBagConstraints();
        myTopPLGBC.weightx = 2;
        myTopPLGBC.weighty = 2;

        myUsernameLBL = new JLabel("Username: ");
        myUsernameLBL.setFont(new Font("Arial", Font.BOLD, 13));
        myTopPLGBC.gridx = 1;
        myTopPLGBC.gridy = 1;
        myTopPLGBC.insets = new Insets(5,5,5,5);
        myTopPL.add(myUsernameLBL, myTopPLGBC);

        myUsernameTF = new JTextField(10);
        myTopPLGBC.gridx = 2;
        myTopPLGBC.gridy = 1;
        myTopPLGBC.insets = new Insets(5,5,5,5);
        myTopPL.add(myUsernameTF,myTopPLGBC);

        myPasswordLBL = new JLabel("Password: ");
        myPasswordLBL.setFont(new Font("Arial", Font.BOLD, 13));
        myTopPLGBC.gridx = 3;
        myTopPLGBC.gridy = 1;
        myTopPLGBC.insets = new Insets(5,5,5,5);
        myTopPL.add(myPasswordLBL, myTopPLGBC);

        myPasswordTF = new JTextField(10);
        myTopPLGBC.gridx = 4;
        myTopPLGBC.gridy = 1;
        myTopPLGBC.insets = new Insets(5,5,5,5);
        myTopPL.add(myPasswordTF,myTopPLGBC);

        myLoginBN = new JButton("Login");
        myTopPLGBC.gridx = 5;
        myTopPLGBC.gridy = 1;
        myTopPLGBC.insets = new Insets(5,5,5,5);
        myTopPL.add(myLoginBN,myTopPLGBC);

        myItemsLBL = new JLabel("Items: ");
        myItemsLBL.setFont(new Font("Arial", Font.BOLD, 13));
        myTopPLGBC2.gridx = 1;
        myTopPLGBC2.gridy = 3;
        myTopPLGBC2.insets = new Insets(5,5,5,5);
        myTopPL2.add(myItemsLBL, myTopPLGBC2);

        myItemsCB = new JComboBox();
        myItemsCB.addItem("     Select an Item     ");
        myTopPLGBC2.gridx = 1;
        myTopPLGBC2.gridy = 4;
        myTopPLGBC2.insets = new Insets(5,5,5,5);
        myTopPL2.add(myItemsCB, myTopPLGBC2);

        myConnectBN = new JButton("Connect");
        myTopPLGBC2.gridx = 2;
        myTopPLGBC2.gridy = 4;
        myTopPLGBC2.insets = new Insets (5,5,5,5);
        myTopPL2.add(myConnectBN, myTopPLGBC2);

        GridBagConstraints GBC = new GridBagConstraints();
        GBC.anchor = GridBagConstraints.NORTHWEST;
        GBC.weightx = 1;
        GBC.weighty = 1; 
        this.add(myTopPL,GBC);  

        GridBagConstraints GBC2 = new GridBagConstraints();
        GBC2.anchor = GridBagConstraints.NORTHWEST;
        GBC2.weightx = 2;
        GBC2.weighty = 2; 
        this.add(myTopPL2,GBC2);    

    }

    public static void main(String[] args) {

        GUI GUI = new GUI ();
        GUI .setDefaultCloseOperation(RMIAuctionHouse.EXIT_ON_CLOSE);
        GUI .setSize(750,500);
        GUI .setVisible(true);
    }
}

3 個解決方案

解決方案1
 5 已采納  2012-11-16 12:05:26

我會將應用程序分解為它的各個職責領域，並專注於創建 UI 元素來支持它。 這將使您能夠專注於應用程序每個部分的需求，它還使您有機會根據需要更改布局

在此處輸入圖片說明

public class TestLayout15 {

    public static void main(String[] args) {
        new TestLayout15();
    }

    public TestLayout15() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Test");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new MainPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }

        });
    }

    public class MainPane extends JPanel {

        private JTextField messageField;
        private JButton sendButton;

        public MainPane() {
            setBorder(new EmptyBorder(4, 4, 4, 4));
            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridx = 0;
            gbc.gridy = 0;
            gbc.weightx = 1;
            gbc.fill = GridBagConstraints.HORIZONTAL;
            gbc.gridwidth = GridBagConstraints.REMAINDER;
            add(new LoginPane(), gbc);
            gbc.gridy++;
            add(new ConnectPane(), gbc);
            gbc.gridy++;
            gbc.weighty = 1;
            gbc.fill = GridBagConstraints.BOTH;
            add(new JScrollPane(new JTextArea(5, 20)), gbc);

            gbc.gridwidth = 1;

            messageField = new JTextField(10);
            sendButton = new JButton("Send");

            gbc.gridy++;
            gbc.weighty = 0;
            gbc.fill = GridBagConstraints.HORIZONTAL;
            add(messageField, gbc);
            gbc.gridx++;
            gbc.weightx = 0;
            add(sendButton, gbc);            
        }

    }

    public class ConnectPane extends JPanel {

        private JComboBox comboBox;
        private JButton connectButton;

        public ConnectPane() {
            comboBox = new JComboBox();
            connectButton = new JButton("Connect");

            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridx = 0;
            gbc.gridy = 0;
            gbc.anchor = GridBagConstraints.WEST;
            add(comboBox, gbc);

            gbc.gridx++;
            gbc.weightx = 1;
            add(connectButton, gbc);
        }

    }

    public class LoginPane extends JPanel {

        private JTextField userNameField;
        private JPasswordField passwordField;
        private JButton loginButton;

        public LoginPane() {

            userNameField = new JTextField(10);
            passwordField = new JPasswordField(10);
            loginButton = new JButton("Login");

            setLayout(new GridBagLayout());
            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridx = 0;
            gbc.gridy = 0;
            gbc.anchor = GridBagConstraints.WEST;
            add(new JLabel("User name:"), gbc);

            gbc.gridx++;
            add(userNameField, gbc);

            gbc.gridx++;
            add(new JLabel("Password:"), gbc);

            gbc.gridx++;
            add(passwordField, gbc);

            gbc.gridx++;
            gbc.weightx = 1;
            add(loginButton, gbc);

        }

    }

}

解決方案2
 1  2012-11-16 12:05:38

首先，用GUI.pack()替換對GUI.setSize(750,500)的調用。 這將調整窗口大小以適合您的內容。 這樣做之后，您會看到第二個面板出現在第一個面板的右側。 這是因為你沒有設置gridx / gridy上GBC2所以它默認為把myTopPL2到右側myTopPL1 ，不能低於它。

使用GridBagLayout時，我很少明確設置gridx / gridy 。 對於顯示的第一行，除了myLoginBN ，我將使用默認值，其中我將gridwidth設置為GridBagConstraints.REMAINDER 。 這告訴 GridBagLayout 該行沒有其他內容。 添加了默認 gbc 的下一個項目將放置在第二行的開頭。

小尼特：

  • 使用標准的 Java 大小寫：
    • 類名是駝峰式的，前導大寫字符。 所以，“GUI”，而不是“GUI”。
    • 實例名稱以駝峰命名，帶前導小寫字符。 所以，“gbc1”不是“GBC1”

  • 使用 SwingUtilities.InvokeLater 在 EDT 上啟動 Gui

     SwingUtilities.invokeLater(new Runnable() { public void run() { GUI GUI = new GUI (); GUI .setDefaultCloseOperation(RMIAuctionHouse.EXIT_ON_CLOSE); GUI .setSize(750,500); GUI .setVisible(true); }});

解決方案3
 -3  2012-11-16 12:25:00

似乎您不熟悉 Java 布局，因此我建議您嘗試使用 null(absolute) 布局：

setLayout(null);
...
component.setBounds( x, y, width, heigh );
add(component);

這里的例子

package gui;

import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class GUI extends JFrame{

    private JTextField myUsernameTF;
    private JLabel myUsernameLBL;

    public GUI() {

        super("GUI ");
        setLayout(null);     

        myUsernameLBL = new JLabel("Username: ");
        myUsernameLBL.setFont(new Font("Arial", Font.BOLD, 13));
        myUsernameLBL.setBounds(50,30,80,20);
        add(myUsernameLBL);

        myUsernameTF = new JTextField(10);
        myUsernameTF.setBounds(190,30,80,20);
        add(myUsernameTF);

        // and so on ...



    }

    public static void main(String[] args) {
        GUI frame = new GUI();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(750,500);
        frame.setVisible(true);
    }
}

祝你在處理 java swing 的棘手方式上好運 =)

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