java - 按钮、JTextFields 和 JComboBox 是不可点击的

Question

该程序由一个选项卡式 View 组成，其中包含一些 JTextField的和JButton前两个和 2 JTable和JButton在第三个。这些按钮在前两个选项卡中工作正常，但在第三个选项卡中则无法单击。我尝试将按钮更改为其他内容，例如 JComboBox或JTextField但这些也是不可编辑和不可点击的。设置setEnabled()和setEditable()函数为 true 似乎不起作用。我不知道发生了什么。

我做的唯一与平常不同的事情是这段代码，当我单击表中的单元格时强制重新绘制选项卡。但即使这还没有被调用，我仍然不能

ContentIWantToRepaint.this.paintImmediately(ContentIWantToRepaint.this.getVisibleRect());

有关布局的一些其他信息:选项卡的内容保存在 JPanel 中。与 GridBagLayout

• JTextField
• 表格标题
• 表格内容
• JTextField
• 表格标题
• 表格内容
• 按钮

有什么建议吗？

checkOutPanel.java

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.DefaultTableModel;


public class checkOutPanel extends JPanel {
    private JTable userTable;
    private JTable bookTable;
    private JScrollPane scrollUserTable, scrollBookTable;
    private JLabel userLabel, bookLabel;
    private DefaultTableModel userTableModel = new DefaultTableModel(){
        public boolean isCellEditable(int row, int column){return false;}
    };
    private DefaultTableModel bookTableModel = new DefaultTableModel(){
        public boolean isCellEditable(int row, int column){return false;}
    };
    private int selectedUser, selectedBook;
    private JComboBox date_month, date_day, date_year;

    public checkOutPanel(){

        JPanel mainGrid = new JPanel();//panel that will hold all stuff in tab
        JPanel buttonPanel = new JPanel();//panel for holding buttons

        mainGrid.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        c.gridx=0; c.gridy=0; //first row first column
        c.anchor = GridBagConstraints.WEST;//align left
        c.fill = GridBagConstraints.HORIZONTAL;

        //1 row, 2 columns, 15 horizontal padding, 0 vertical padding
        //buttonPanel.setLayout(new GridLayout(1,2,15,0));

        //labels to describe what the user has to do
        userLabel = new JLabel("User :");
        bookLabel = new JLabel("Book :");
        JLabel dateLabel = new JLabel("Date :");
        JPanel datePanel = new JPanel();

        bookTable = new JTable(bookTableModel);
        bookTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        userTable = new JTable(userTableModel);
        userTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        Dimension d = new Dimension(500, 120);

        scrollBookTable = new JScrollPane(bookTable); 
        scrollBookTable.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); 
        scrollBookTable.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS); 
        scrollBookTable.setMaximumSize(d);
        scrollBookTable.setMinimumSize(d);
        scrollBookTable.setPreferredSize(d);

        scrollUserTable = new JScrollPane(userTable); 
        scrollUserTable.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); 
        scrollUserTable.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS); 
        scrollUserTable.setMaximumSize(d);
        scrollUserTable.setMinimumSize(d);
        scrollUserTable.setPreferredSize(d);

        updateTables();

        //String[] month = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};       

        //Vector<Integer> days = new Vector<Integer>();
        //for (int i=1 ; i<=31 ; i++) { days.add(i); }

        //Vector<Integer> years = new Vector<Integer>();
        //for (int i=2012 ; i>=1900 ; i--) { years.add(i); }

        //date_month = new JComboBox(days);
        JButton testButton = new JButton("WORK!!!!!!!");
        //date_day = new JTextField(6);
        //date_year = new JTextField(6);

        //datePanel.add(dateLabel);
        //datePanel.add(date_month);
        //datePanel.add(date_day);
        //datePanel.add(date_year);



        mainGrid.add(userLabel, c);                     c.gridy++;
        mainGrid.add(userTable.getTableHeader(), c);    c.gridy++;
        mainGrid.add(scrollUserTable, c);               c.gridy++;
        c.insets = new Insets(15, 0, 0, 0);//put some padding between users and books
        mainGrid.add(bookLabel, c);                     c.gridy++;
        c.insets= new Insets(0,0,0,0);//back to no padding
        mainGrid.add(bookTable.getTableHeader(), c);    c.gridy++;
        mainGrid.add(scrollBookTable, c);               c.gridy++;
        c.insets = new Insets(15, 0, 0, 0);//put some padding between books and date

        mainGrid.add(testButton, c);                        c.gridy++;





        this.add(mainGrid);//add contents to tab


        userTable.addMouseListener(new mouseListener());
        bookTable.addMouseListener(new mouseListener());

    }

    public class mouseListener implements MouseListener{
        @Override
        public void mouseClicked(MouseEvent e) {}
        @Override
        public void mouseEntered(MouseEvent e) {}
        @Override
        public void mouseExited(MouseEvent e) {}
        @Override
        public void mousePressed(MouseEvent e) {}
        @Override
        public void mouseReleased(MouseEvent e) {
            if(e.getSource()==userTable){
                selectedUser=userTable.getSelectedRow();
                userLabel.setText("User :  "+ (selectedUser!=-1 ? selectedUser : ""));

                //don't know why i should need to use this, but it makes it work
                checkOutPanel.this.paintImmediately(checkOutPanel.this.getVisibleRect());


            }else if(e.getSource()==bookTable){
                selectedBook = bookTable.getSelectedRow();
                System.out.println("Date Month : "+date_month.getSelectedItem().toString());
                bookLabel.setText("Book :  "+ (selectedBook!=-1 ? selectedBook : ""));

                //don't know why i should need to use this, but it makes it work
                checkOutPanel.this.paintImmediately(checkOutPanel.this.getVisibleRect());


            }
        }
    }





    private void updateTables(){
        bookTableModel.setDataVector(fillBookData(SystemStart.getDbName()), fillBookColNames());
        userTableModel.setDataVector(fillUserData(SystemStart.getDbName()), fillUserColNames());
    }




    private Vector<String> fillUserColNames(){
        Vector<String> colNames = new Vector<String>();
        colNames.add("ID");
        colNames.add("First");
        colNames.add("Last");
        colNames.add("Phone");
        colNames.add("Email");
        colNames.add("Address");
        colNames.add("City");
        colNames.add("State");
        colNames.add("Zip");        
        return colNames;
    }
    private Vector<String> fillBookColNames(){
        Vector<String> colNames = new Vector<String>();
        colNames.add("Title");
        colNames.add("Format");
        colNames.add("Author");
        colNames.add("ISBN");
        colNames.add("Year Pub.");
        colNames.add("Publisher");
        colNames.add("Call #");
        colNames.add("Copy #");     
        return colNames;    
    }
    private Vector<Vector<String>> fillUserData(String dbName){
        Vector<Vector<String>> v = new Vector<Vector<String>>();
        Vector<String> u;
        for (int i=0; i<10; i++){
            u = new Vector<String>(9);
            u.add(""+i);
            u.add("First");
            u.add("Last");
            u.add("Phone");
            u.add("Email");
            u.add("Address");
            u.add("City");
            u.add("State");
            u.add("Zip");
            v.add(u);
        }
        return v;
    }

    private Vector<Vector<String>> fillBookData(String dbName) {
        Vector<Vector<String>> v = new Vector<Vector<String>>();
        Vector<String> b;
        for (int i=0; i<10; i++){//only include books that arent check out
            b = new Vector<String>(8);
            b.add("Title "+i);
            b.add("Format");
            b.add("Author");
            b.add("ISBN");
            b.add("Year Pub.");
            b.add("Publisher");
            b.add("Call #");
            b.add("Copy #");
            v.add(b);
        }
        return v;
    }
}

使用此文件来查看它如何不起作用:

import javax.swing.JFrame;

public class SystemStart{
    private static String dbName = "dbnamehere.db";

    public static void main(String[] args) {

        //new TabbedFrame("Libary System");
        JFrame jf = new JFrame("WORK!");
        jf.add(new checkOutPanel());
        jf.pack();
        jf.setVisible(true);
            jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static String getDbName(){return dbName;}

}

Answer 1

您要向面板添加一个标签，然后是表格标题，然后是包含表格(...和表格标题)的滚动 Pane 。删除要添加到 mainGrid 表标题的两行(您应该只添加滚动 Pane ):

    mainGrid.add(userTable.getTableHeader(), c);    c.gridy++;
    mainGrid.add(bookTable.getTableHeader(), c);    c.gridy++;

您的按钮现在可以使用了。