写一个创建选项卡的按钮,我需要将一些信息传递给新选项卡?

时间:2012-12-02 12:14:26

标签: java swing actionlistener jtabbedpane

我正在用JTabbed Panes编写一个程序。我想要一个从JTextField获取一些文本的按钮,使用该文本创建一个新选项卡。新选项卡将包含name = Jtextfield.getText(),它将在JTextArea中打印10次。

我真正的问题是,如何将一些数据传递给一个按钮的ActionListener,或者我该如何解决这个问题,因为这会给我带来麻烦?

更新:

这是我试图解决这个问题。我知道代码很复杂,我是一个可怕的程序员。我希望你能帮助我看看这里出了什么问题。我担心我的CreateComponent方法和CreateNewFeedBlock actionListener出错了。

以下是我的一些代码,请耐心等待。

private static JPanel mainPane;    
private JPanel categoryPanel; 
private JTextField categoryName;
private JPanel panel1;
private JTextField title1;
private JTextField url1;
private JPanel panel2;
private JTextField title2;
private JTextField url2;
private JPanel panel3;
private JTextField title3;
private JTextField url3;
private JPanel panel4;
private JTextField title4;
private JTextField url4;

public BIS() 
{
//unecessary code
categoryPanel = new JPanel();
categoryPanel.setLayout(new GridLayout(2,2));
JLabel emptyLabel1 = new JLabel("");
JLabel emptyLabel2 = new JLabel("");
JLabel insertCategoryName = new JLabel("Category name:");
categoryName = new JTextField(20);

panel1 = new JPanel();
panel1.setLayout(new GridLayout(2,2));
JLabel insertTitle1 = new JLabel("Feed Title:");
title1 = new JTextField(20);
JLabel insertURL1 = new JLabel("URL:");
url1 = new JTextField(20);
panel1.add(insertTitle1);
panel1.add(title1);
panel1.add(insertURL1);
panel1.add(url1);




categoryPanel.add(emptyLabel1);
categoryPanel.add(emptyLabel2);
categoryPanel.add(insertCategoryName);
categoryPanel.add(categoryName);

JPanel addPanel = new JPanel(new GridLayout(6,1));
JButton addButton = new JButton("Create Your RSS Show");

addPanel.add(categoryPanel);
addPanel.add(panel1);
addPanel.add(addButton);
addPanel.setBorder(BorderFactory.createEmptyBorder(64, 64, 64, 64));

addButton.addActionListener(new CreateTab());

pane.add("Create Your Own", addPanel);

Timer timer = new Timer(15000, new ActionListener()
{

public void actionPerformed(ActionEvent e)
{
allRun();
//System.out.println("U BO NIHER");
}
});
timer.setRepeats(true);
timer.setCoalesce(true);
timer.start();
timer.restart();
}


public class CreateTab implements ActionListener
{
public void actionPerformed(ActionEvent e)
{

panel = new JPanel();
while (!url1.getText().contains("http://"))
{
JOptionPane.showMessageDialog(panel, "The RSS Feed Link does not contain http//.");
url1.setText(JOptionPane.showInputDialog("Please enter the full URL to the RSS Feed?"));
}


rssListForTab = new ArrayList<rssInfo>();

rssInfo feedInfo = new rssInfo(title1.getText(), url1.getText());

rssListForTab.add(feedInfo);
rssListForAll.add(rssListForTab);

final Component newTab = createComponent(panel, rssListForTab);
pane.add(categoryName.getText(), newTab);


// newTab.get
// newTab.getComponent(2);

categoryName.setText("");
title1.setText("");
url1.setText("");

}
}

private JComponent createComponent(JPanel panel, ArrayList<rssInfo> rssList)
{
JLabel t1 = new JLabel(title1.getText(), JLabel.CENTER);
JTextArea u1 = new JTextArea(5,5);
JScrollPane u1Scroll = new JScrollPane(u1);
u1Scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
u1Scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
u1.setEditable(false);
u1.setFont(new Font("Tahoma", Font.BOLD, 12));
u1.setLineWrap(true);
u1.setWrapStyleWord(true);

JButton addFeedButton = new JButton("Add Feed");
panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));

panel.add(addFeedButton);
panel.add(t1);
panel.add(u1Scroll);
panel.setSize(1,1);
panel.setBorder(BorderFactory.createEmptyBorder(6, 6, 6, 6));

addFeedButton.addActionListener(new createNewFeedBlock());
return panel;
}

public class createNewFeedBlock implements ActionListener  
{
public void actionPerformed(ActionEvent e)
{
rssInfo newFeedInfo = DisplayDialog();

JLabel t2 = new JLabel(newFeedInfo.getTitle(), JLabel.CENTER);
JTextArea u2 = new JTextArea(5,5);
JScrollPane u2Scroll = new JScrollPane(u2);  
u2Scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
u2Scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
u2.setEditable(false);
u2.setFont(new Font("Tahoma", Font.BOLD, 12));   
u2.setLineWrap(true);
u2.setWrapStyleWord(true);

rssListForTab.add(newFeedInfo);

panel.add(t2);
panel.add(u2Scroll);

}
}

我认为问题在于CreateNewFeedBlock和/或createComponent方法。我知道这段代码很难阅读,但请看看你是否可以帮我找到出错的地方。

请看看你看错了什么,告诉我,我正在尽力解决这个问题,但我很无奈。我希望你的帮助能带我度过这一挑战。

UPDATE **

此代码无法正常运行,每当我点击addFeedButton,而不是将一个Feed添加到调用它的相应选项卡时,它会向窗格中的所有选项卡添加一个Feed。

我很确定这是一个可变范围问题,有人可以帮我找到解决方法吗? 谢谢!

1 个答案:

答案 0 :(得分:0)

当调用Click-Action时,ActionListener将获取对作为ActionEvent-Object的一部分传递给它的cause对象的引用。所以在事件处理函数中你可以使用例如:

public void actionPerformed(ActionEvent e) { 
    JButton sourceButton = (JButton)e.getSource();
}

如果你想从函数内部引用TextField,那么你可以尝试直接解决它(如果actionHandler在与对象相同的类中定义,则很容易),或者你创建自己的自定义按钮类,包括引用文本字段(如果您在父类中单独定义了动作处理程序,则可能很有用) 例如:

class MyTabButton extends JButton{
   private JTextField tabTextField;
   public MyTabButton(JTextField text){
      tabTextField = text;
   }
   public JTextField getTabTextField(){
      return tabTextField;
   }
   //... someOtherStuff
}

然后你会通过

在actionHandler中得到它
public void actionPerformed(ActionEvent e) { 
    MyTabButton sourceButton = (MyTabButton)e.getSource();
    String text = sourceButton.gettabTextField().getText();
}