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标题: 关于GUI中卡片布局 [打印本页]

作者: 陌花╮有意、 时间: 2012-6-25 00:55
标题: 关于GUI中卡片布局
import java.awt.*;
import java.awt.event.*;

import javax.swing.JFrame;

public class CardLayout_1 {
public static void main(String args[]) {
new CardLayout_1().go();
}

public void go() {
final Frame f = new Frame("CardLayout演示");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
f.setVisible(false);
f.dispose();
System.exit(0);
}
});

f.setSize(300, 100);
f.setLayout(new CardLayout());

final Frame f1 = f;
for (int i = 1; i <= 5; i++) {
Button b = new Button("Button " + i);
b.setSize(100, 25);
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
CardLayout cl = (CardLayout) f1.getLayout();
cl.next(f1);
}
});
f.add(b, "button" + i);
}
f.setVisible(true);
}
}

谁能给解释下这个卡片布局到底是怎么运行的希望有更好的例子可以借鉴

作者: 张华廷 时间: 2012-6-25 09:48
public class CardLayout_1 {
      public static void main(String args[]) {
            new CardLayout_1().go();
      }

      public void go() {
            final Frame f = new Frame("CardLayout演示");
            f.addWindowListener(new WindowAdapter() {
                     public void windowClosing(WindowEvent evt) {
                              f.setVisible(false);
                              f.dispose();
                              System.exit(0);
                     }
            });

            f.setSize(300, 100);
            f.setLayout(new FlowLayout());
            //f.setLayout(new CardLayout());buttom按钮自动充满窗体,改为f.setLayout(new FlowLayout())就可以看到全部布局。

            final Frame f1 = f;
            for (int i = 1; i <= 5; i++) {
                     Button b = new Button("Button " + i);
                     b.setSize(100, 25);
                     b.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent ae) {
                                    CardLayout cl = (CardLayout) f1.getLayout();
                                    cl.next(f1);
                              }
                     });
                     f.add(b, "button" + i);
            }
            f.setVisible(true);
      }
}
看完毕老师视频写的例子：

import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class MyMenuTest
{
private Frame f;
private MenuBar bar;
private TextArea ta;
private Menu fileMenu;
private MenuItem openItem,saveItem,closeItem;

private FileDialog openDia,saveDia;

private File file;
MyMenuTest()
{
init();

}
public void init()
{
f = new Frame("my window");
f.setBounds(300,100,650,600);
//f.setLayout(new FlowLayout());//边界布局

bar = new MenuBar();

ta = new TextArea();

fileMenu = new Menu("文件");

openItem = new MenuItem("文件");
saveItem = new MenuItem("保存");
   closeItem = new MenuItem("退出");

   fileMenu.add(openItem);
   fileMenu.add(saveItem);
   fileMenu.add(closeItem);
   bar.add(fileMenu);

   f.setMenuBar(bar);
   openDia = new FileDialog(f,"我要打开",FileDialog.LOAD);
   saveDia = new FileDialog(f,"我要保存",FileDialog.SAVE);

   f.add(ta);
   myEvent();

   f.setVisible(true);



}
private void myEvent()
{
saveItem.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if(file ==null)
{
saveDia.setVisible(true);

String dirPath =saveDia.getDirectory();
String fileName = saveDia.getFile();
if(dirPath==null || fileName== null)
   return;

   file = new File(dirPath,fileName);
}
try
{
BufferedWriter bufw = new BufferedWriter(new FileWriter(file));

String text = ta.getText();

bufw.write(text);
//bufw.flush();
bufw.close();

}
   catch(IOException ex)
   {
      throw new RuntimeException();
   }

}

});
openItem.addActionListener(new ActionListener()
{
   public void actionPerformed(ActionEvent e)
   {
        openDia.setVisible(true);
        String dirPath = openDia.getDirectory();//路径
        String fileName = openDia.getFile();//文件名
        System.out.println(dirPath+"......"+fileName);
        if (dirPath == null || fileName==null)
        return;

        ta.setText("");//清空
        file = new File(dirPath,fileName);//封装文件

        try
        {

           BufferedReader bufr = new BufferedReader(new FileReader(file));
           String line =null ;

           while((line=bufr.readLine())!=null)
           {
           ta.append(line+"\r\n");
           }
           bufr.close();


        }
     catch(IOException ex)
   {
      throw new RuntimeException("读取失败");
   }


}
});
closeItem.addActionListener(new ActionListener()
{
//closeItem.addPerformed(ActionEvent e)

public void actionPerformed(ActionEvent e)
{
System.exit(0);
}

});
f.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});

}

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

}

}

作者: 陈少文 时间: 2012-6-25 12:40
/*
卡片布局是一种共享容器面板的技术。当用鼠标单击控件的选项后，将显示不同的功能界面
卡片布局把容器面板视作一盒卡片，当控件添加到面板后，将自动放入一个卡片中，单击后进入下一个卡片
用到的类：
java.awt.CardLayout;
javax.swing.JButton;
因为有事件产生用到事件类
java.awt.event.ActionListener;
java.awt.enent.ActionEvent;

可以看一下下面的例子，当单击jButton1时，就会出现jButton2,单击jButton2时，出现
jButton3
*/
import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
class UsedCardLayout extends JFrame implements ActionListener
{

   //创建卡片布局管理器
   CardLayout cardLayout1 = new CardLayout(20,30);
   JButton jButton1 = new JButton("按钮1");
   JButton jButton2 = new JButton("按钮2");
   JButton jButton3 = new JButton("按钮3");

   UsedCardLayout()
   {
         setTitle("卡片布局示例");
         setSize(300,200);
         setDefaultCloseOperation(EXIT_ON_CLOSE);

         this.getContentPane().setLayout(cardLayout1);
         this.getContentPane().add("myCard1",jButton1);
         this.getContentPane().add("myCard2",jButton2);
         this.getContentPane().add("myCard3",jButton3);
      //添加监听
         jButton1.addActionListener(this);
         jButton2.addActionListener(this);
         jButton3.addActionListener(this);
      setVisible(true);

         }

//进行卡片翻阅 next 显示下一个卡片 first 显示第一个卡片
   public void actionPerformed(ActionEvent e)
   {
         Object source = e.getSource();
         if(source == jButton1 || source == jButton2 )
         {
               cardLayout1.next(this.getContentPane());

         }
         else if(e.getSource() == jButton3)
         {
                  cardLayout1.first(this.getContentPane());

         }

   }
public static void main(String[] args)
{
      UsedCardLayout usedCardLayout = new UsedCardLayout();
}

}

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