Question

我创建了一个JTabbedPane和一些JPanel个对象。由于每个面板几乎看起来相同，因此字段也称为相同。我认为没关系，因为所有字段都是局部变量。现在我在控制器类中，我遇到了一个问题：

向每个JPanel和
确定选择了哪个标签窗格。

这是GUI：包mainGUI;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.border.LineBorder;

public class MainMenuGUI {

JTabbedPane tabbedPane = new JTabbedPane();

JPanel findUserPanel;
JPanel deleteUserPanel;
JPanel addUserPanel;

JFrame frame = new JFrame();
JPanel tabbedPanel = new JPanel();

//Controller class for MainMenuGUI
ControllerMainMenuGUI listen = new ControllerMainMenuGUI(this);

public MainMenuGUI() {

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, 400);
    findUserPanel = createFindUserPanel();
    deleteUserPanel = createDeleteUserPanel();
    addUserPanel = createAddUserPanel();

    tabbedPane.addTab("Find User", findUserPanel);
    tabbedPane.addTab("Delete User", deleteUserPanel);
    tabbedPane.addTab("Add User", addUserPanel);

    tabbedPanel.add(tabbedPane);
    frame.add(tabbedPanel);

    frame.pack();
    // opens frame in the center of the screen
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}

JPanel createFindUserPanel() {
    findUserPanel = new JPanel();
    findUserPanel.setPreferredSize(new Dimension(300, 300));
    findUserPanel.setLayout(new GridLayout(5, 7));

    JLabel firstlbl = new JLabel("First Name");
    JLabel lastlbl = new JLabel("Last Name");
    JLabel addresslbl = new JLabel("Address");
    JLabel agelbl = new JLabel("Age");

    JTextField firstNametxt = new JTextField(15);
    JTextField lastNametxt = new JTextField(15);
    JTextField addresstxt = new JTextField(30);
    JTextField age = new JTextField(3);
    JButton btn = new JButton("Submit");
    JScrollPane window = new JScrollPane();
    window.setViewportBorder(new LineBorder(Color.RED));
    window.setPreferredSize(new Dimension(150, 150));

    findUserPanel.add(firstlbl);
    findUserPanel.add(firstNametxt);
    findUserPanel.add(lastlbl);
    findUserPanel.add(lastNametxt);
    findUserPanel.add(addresslbl);
    findUserPanel.add(addresstxt);
    findUserPanel.add(agelbl);
    findUserPanel.add(age);
    findUserPanel.add(window, BorderLayout.CENTER);
    findUserPanel.add(btn);

    return findUserPanel;
}

JPanel createDeleteUserPanel() {
    deleteUserPanel = new JPanel();
    deleteUserPanel.setPreferredSize(new Dimension(300, 300));
    deleteUserPanel.setLayout(new GridLayout(5, 7));

    JLabel firstlbl = new JLabel("First Name");
    JLabel lastlbl = new JLabel("Last Name");
    JLabel addresslbl = new JLabel("Address");
    JLabel agelbl = new JLabel("Age");

    JTextField firstNametxt = new JTextField(15);
    JTextField lastNametxt = new JTextField(15);
    JTextField addresstxt = new JTextField(30);
    JTextField age = new JTextField(3);
    JButton btn = new JButton("Submit");
    JScrollPane window = new JScrollPane();
    window.setViewportBorder(new LineBorder(Color.RED));
    window.setPreferredSize(new Dimension(150, 150));

    deleteUserPanel.add(firstlbl);
    deleteUserPanel.add(firstNametxt);
    deleteUserPanel.add(lastlbl);
    deleteUserPanel.add(lastNametxt);
    deleteUserPanel.add(addresslbl);
    deleteUserPanel.add(addresstxt);
    deleteUserPanel.add(agelbl);
    deleteUserPanel.add(age);
    deleteUserPanel.add(window, BorderLayout.CENTER);
    deleteUserPanel.add(btn);
    return deleteUserPanel;
}

JPanel createAddUserPanel() {
    addUserPanel = new JPanel();
    addUserPanel.setPreferredSize(new Dimension(300, 300));
    addUserPanel.setLayout(new GridLayout(5, 7));
    JLabel firstlbl = new JLabel("First Name");
    JLabel lastlbl = new JLabel("Last Name");
    JLabel addresslbl = new JLabel("Address");
    JLabel agelbl = new JLabel("Age");

    JTextField firstNametxt = new JTextField(15);
    JTextField lastNametxt = new JTextField(15);
    JTextField addresstxt = new JTextField(30);
    JTextField age = new JTextField(3);
    // nametxt.setPreferredSize(new Dimension(1,10));
    JButton btn = new JButton("Submit");
    JScrollPane window = new JScrollPane();
    window.setViewportBorder(new LineBorder(Color.RED));
    window.setPreferredSize(new Dimension(150, 150));

    addUserPanel.add(firstlbl);
    addUserPanel.add(firstNametxt);
    addUserPanel.add(lastlbl);
    addUserPanel.add(lastNametxt);
    addUserPanel.add(addresslbl);
    addUserPanel.add(addresstxt);
    addUserPanel.add(agelbl);
    addUserPanel.add(age);
    addUserPanel.add(window, BorderLayout.CENTER);
    addUserPanel.add(btn);
    return addUserPanel;
}
}

控制器类：

package mainGUI;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class ControllerMainMenuGUI {

MainMenuGUI mainMenuGUI;

int currentTabbedIndex = 0;

ControllerMainMenuGUI(MainMenuGUI mainMenuGUI){
    this.mainMenuGUI = mainMenuGUI;
}

//inner class will handle MainMenuGUI actions
class Actions implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {


    }

    private void addTabbedPaneListeners() {

        mainMenuGUI.tabbedPane.addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent ce) {

                currentTabbedIndex =   
mainMenuGUI.tabbedPane.getSelectedIndex();
                System.out.println("Current tab is:" + currentTabbedIndex);

            }
        });
    }



}

}

JPanel动作监听器

0 个答案: