JFrame拒绝重绘()

时间:2013-12-30 05:17:33

标签: java swing jframe repaint

我真的需要帮助。我有一个JFrame与一些JTextFields,我已禁用。我希望通过单击一下JToggleButton(“编辑”)来启用它们,这也是在JFrame上。因此,在costructor中,我将一个 boolean isEditable参数(它是一个字段)传递给所有JTextField的.isEditable()方法,以便在JFrame显示并单击editButton之后发生的是isEditable值更改为 true ,并重新绘制整个JFrame。问题是JFrame拒绝重新绘制!我能做什么?我会非常感激我得到的任何帮助。谢谢:)
代码:

package job;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.JToggleButton;
import javax.swing.SwingConstants;
import javax.swing.border.EmptyBorder;

public class TestFrame extends JFrame implements ItemListener{

    private JPanel contentPane;
    private boolean saveEnabled = false;
    private boolean editEnabled = false; 
    private String actionCommand;
    private Node n;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    TestFrame frame = new TestFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public TestFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout(0, 0));
        setContentPane(contentPane);

        setBounds(50, 60, 600, 640);

        JLabel detailsBanner = new JLabel();

        contentPane.add(detailsBanner, BorderLayout.NORTH);
        JPanel contentDetail = new JPanel();
        contentDetail.setLayout(new BoxLayout(contentDetail, BoxLayout.PAGE_AXIS));
        JPanel namePanel = new JPanel();
        namePanel.setLayout(new BoxLayout(namePanel, BoxLayout.LINE_AXIS));
        namePanel.setBorder(BorderFactory.createEmptyBorder(10, 0, 0, 10));
        String nameString = "Sample";
        setTitle(nameString);
        JLabel nameText = new JLabel(nameString);
        namePanel.add(nameText);
        contentDetail.add(namePanel);
        JSeparator sep = new JSeparator(SwingConstants.HORIZONTAL);
        contentDetail.add(sep);
        JPanel commanderPanel = new JPanel();
        commanderPanel.setLayout(new BoxLayout(commanderPanel, BoxLayout.PAGE_AXIS));

        JPanel commanderNamePanel = new JPanel();
        JLabel commanderTitle = new JLabel("Commander");
        JTextField commanderName = new JTextField("Sample");
        commanderName.setEnabled(editEnabled);
        commanderNamePanel.setLayout(new GridLayout(1,2));
        commanderNamePanel.add(commanderTitle);
        commanderNamePanel.add(commanderName);
        commanderPanel.add(commanderNamePanel);

        contentPane.add(commanderPanel);

        JPanel  mainAuxButtonPanel = new JPanel();
        mainAuxButtonPanel.setLayout(new BorderLayout(0, 0));
        JPanel auxButtonPanel = new JPanel();
        GridBagLayout auxButtonsLayout = new GridBagLayout();
        JPanel sepPanel = new JPanel();
        GridBagLayout sepLayout = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        c.insets = new Insets(30, 0, 0, 0);
        c.fill = GridBagConstraints.HORIZONTAL;
        sepPanel.setLayout(sepLayout);
        sepPanel.add(new JSeparator(SwingConstants.HORIZONTAL), c);
        mainAuxButtonPanel.add(sepPanel, BorderLayout.NORTH);

        c.fill = GridBagConstraints.NONE;
        c.insets = new Insets(10, 5, 0, 0);
        auxButtonPanel.setLayout(auxButtonsLayout);
        JButton back = new JButton("Back");
        auxButtonsLayout.setConstraints(back, c);
        back.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent arg0) {
                dispose();
            }
        });
        auxButtonsLayout.setConstraints(back, c);
        auxButtonPanel.add(back);

        JToggleButton edit = new JToggleButton("Edit");
        auxButtonsLayout.setConstraints(edit, c);
        edit.addItemListener(this);
        auxButtonPanel.add(edit);

        JButton save = new JButton("Save");
        save.setEnabled(saveEnabled);
        auxButtonsLayout.setConstraints(save, c);
        back.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent arg0) {
            }
        });
        auxButtonPanel.add(save);
        mainAuxButtonPanel.add(auxButtonPanel, BorderLayout.EAST);

        contentPane.add(mainAuxButtonPanel, BorderLayout.SOUTH);
    }

    @Override
    public void itemStateChanged(ItemEvent e) {
        if (e.getStateChange() == ItemEvent.SELECTED){
            editEnabled = true;
            System.out.println(editEnabled);
        }else{
            editEnabled = false;
            System.out.println(editEnabled);
        }
        System.out.println("repaintin...");
        contentPane.repaint();
    }
}

1 个答案:

答案 0 :(得分:0)

我不知道为什么你需要重新绘制JFrame。

假设您有一个名为field的JTextField,只需添加一个actionlistener并添加如下代码:

filed.setEnabled(!filed.isEnabled());

更重要的是,也许你应该在正确的组件上调用repaint方法,而不是在JFrame上调用。

或尝试revalidate()和类似的方法。

<强>更新

我的意思是,您不应该在重绘方法中更新组件的启用状态。

也许没有必要使用editEnabled变量来保存状态,请尝试这种方式并修改它以满足您的需求:

JToggleButton edit = new JToggleButton("Edit");
        auxButtonsLayout.setConstraints(edit, c);
        edit.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                commanderName.setEnabled(!commanderName.isEnabled());
            }
        });
        auxButtonPanel.add(edit);

如果您有许多JTextField,只需迭代它。