Swing带关闭按钮的JTabelpane成效

Swing带关闭按钮的JTabelpane效果

 

Swing中有JTabelPane也签面板可以使用，但是面板不带有关闭按钮，为了模仿eclipse里面打开代码窗口关闭的效果，需要在JTabelpane上面也加一个关闭的"X"效果。由于自己Swing水平还比较有限，于是到网上找了一个开源的，开源Swing控件的名称为OpenSwing.OpenSwing对Swing常用的一些Swing空间做了封装，使用起来还是比较方便的。如果您对Swing有兴趣也可以参考OpenSwing的实现自己做几个方便自己用。OpenSwing自带的JCloseableTabbedPane带的关闭按钮带有立体效果。我略作了修改将立体效果去掉了。

1、没修改前效果

2、Nimbus样式效果，还是Nimbus样式好看

3、第二个页签"X"显示和其他不一样

这里的效果是有代码中的

tab.setIconDrawCenter(1, false);

 

这句话设置的，如果想和其他效果一样，注释掉该行代码即可。

4、最后效果样式

 

5、代码如下：

package gui;

import java.io.*;

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

import javax.swing.*;
import javax.swing.event.*;

/**
 * <p>Title: OpenSwing</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author <a href="mailto:sunkingxie@hotmail.com">SunKing</a>
 * @version 1.0
 */
public class JCloseableTabbedPane extends JTabbedPane implements Serializable{
    public static final String ON_TAB_CLOSE = "ON_TAB_CLOSE";
    public static final String ON_TAB_DOUBLECLICK = "ON_TAB_DOUBLECLICK";
    private JPopupMenu popup = null;
    public JCloseableTabbedPane(){
        super();
        init();
    }

    public JCloseableTabbedPane(int tabPlacement){
        super(tabPlacement);
        init();
    }

    public JCloseableTabbedPane(int tabPlacement, int tabLayoutPolicy){
        super(tabPlacement, tabLayoutPolicy);
        init();
    }

    protected void init(){
        addMouseListener(new DefaultMouseAdapter());
    }

    public void setPopup(JPopupMenu popup){
        this.popup = popup;
    }

    public void setIconDrawCenter(int index, boolean drawCenter){
        ((CloseIcon)getIconAt(index)).setDrawCenter(drawCenter);
        repaint();
    }

    public JPopupMenu getPopup(){
        return popup;
    }

    public boolean isDrawCenter(int index){
        return((CloseIcon)getIconAt(index)).isDrawCenter();
    }

    protected EventListenerList closeListenerList = new EventListenerList();
    public void addCloseListener(ActionListener l){
        closeListenerList.add(ActionListener.class, l);
    }

    public void removeCloseListener(ActionListener l){
        closeListenerList.remove(ActionListener.class, l);
    }

    protected void fireClosed(ActionEvent e){
        Object[] listeners = closeListenerList.getListenerList();
        for(int i = listeners.length - 2; i >= 0; i -= 2){
            if(listeners[i] == ActionListener.class){
                ((ActionListener)listeners[i + 1]).actionPerformed(e);
            }
        }
    }

    class DefaultMouseAdapter extends MouseAdapter{
        CloseIcon icon;
        public void mousePressed(MouseEvent e){
            int index = indexAtLocation(e.getX(), e.getY());
            if(index != -1){
                icon = (CloseIcon)getIconAt(index);
                if(icon.getBounds().contains(e.getPoint())){
                    icon.setPressed(true);
                    fireClosed(new ActionEvent(
                        e.getComponent(),
                        ActionEvent.ACTION_PERFORMED,
                        ON_TAB_CLOSE));
                } else if(e.getClickCount() == 2){
                    fireClosed(new ActionEvent(
                        e.getComponent(),
                        ActionEvent.ACTION_PERFORMED,
                        ON_TAB_DOUBLECLICK));
                }
            }
        }
        @Override
        public void mouseEntered(MouseEvent e) {
        	 int index = indexAtLocation(e.getX(), e.getY());
             if(index != -1){
                 icon = (CloseIcon)getIconAt(index);
                 if(icon.getBounds().contains(e.getPoint())){
                 }
             }
        }
        public void mouseReleased(MouseEvent e){
            if(icon != null){
                icon.setPressed(false);
                icon = null;
                repaint();
            }
            if(popup != null){
                if(!SwingUtilities.isRightMouseButton(e)){
                    return;
                }

                if(indexAtLocation(e.getX(), e.getY()) != -1){
                    popup.show(e.getComponent(), e.getX(), e.getY());
                }
            }
        }
    }

    public Icon getIconAt(int index){
        Icon icon = super.getIconAt(index);
        if(icon == null || !(icon instanceof CloseIcon)){
            super.setIconAt(index, new CloseIcon());
        }
        return super.getIconAt(index);
    }

    class CloseIcon implements Icon{
        Rectangle rec = new Rectangle(0, 0, 15, 16);
        private boolean pressed = false;
        private boolean drawCenter = true;
        public synchronized void paintIcon(
            Component c, Graphics g, int x1, int y1){
            int x = x1+5, y = y1;
            if(pressed){
                x++;
                y++;
            }
            rec.x = x;
            rec.y = y;
            Color oldColor =Color.WHITE;
            //去掉按钮立体形状
/*            g.setColor(UIManager.getColor("TabbedPane.highlight"));
            g.drawLine(x, y, x, y + rec.height);
            g.drawLine(x, y, x + rec.width, y);
            g.setColor(UIManager.getColor("TabbedPane.shadow"));
            g.drawLine(x, y + rec.height, x + rec.width, y + rec.height);
            g.drawLine(x + rec.width, y, x + rec.width, y + rec.height);
            g.setColor(UIManager.getColor("TabbedPane.foreground"));*/
            //draw X
            //left top
            g.drawRect(x + 4, y + 4, 1, 1);
            g.drawRect(x + 5, y + 5, 1, 1);
            g.drawRect(x + 5, y + 9, 1, 1);
            g.drawRect(x + 4, y + 10, 1, 1);
            //center
            if(drawCenter){
                g.drawRect(x + 6, y + 6, 1, 1);
                g.drawRect(x + 8, y + 6, 1, 1);
                g.drawRect(x + 6, y + 8, 1, 1);
                g.drawRect(x + 8, y + 8, 1, 1);
            }
            //right top
            g.drawRect(x + 10, y + 4, 1, 1);
            g.drawRect(x + 9, y + 5, 1, 1);
            //right bottom
            g.drawRect(x + 9, y + 9, 1, 1);
            g.drawRect(x + 10, y + 10, 1, 1);
            g.setColor(oldColor);
        }

        private void drawRec(Graphics g, int x, int y){
            g.drawRect(x, y, 1, 1);
        }

        public Rectangle getBounds(){
            return rec;
        }

        public void setBounds(Rectangle rec){
            this.rec = rec;
        }

        public int getIconWidth(){
            return rec.width;
        }

        public int getIconHeight(){
            return rec.height;
        }

        public void setPressed(boolean pressed){
            this.pressed = pressed;
        }

        public void setDrawCenter(boolean drawCenter){
            this.drawCenter = drawCenter;
        }

        public boolean isPressed(){
            return pressed;
        }

        public boolean isDrawCenter(){
            return drawCenter;
        }
    };

    /**
     * 测试
     * @param args String[]
     */
    public static void main(String[] args){
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
        }
        catch (Exception e) {
        }
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setTitle("JCloseableTabbedPane Demo");
        frame.getContentPane().setLayout(new BorderLayout());
        final JCloseableTabbedPane tab = new JCloseableTabbedPane();
        tab.add(new JPanel(), "TabbedPane");
        tab.add(new JPanel(), "Has");
        tab.add(new JPanel(), "Popup");
        tab.add(new JPanel(), "PopupMenu");

//        tab.setIconDrawCenter(1, false);
        
        //添加关闭按钮事件
        tab.addCloseListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                if(e.getActionCommand().equals(tab.ON_TAB_CLOSE)){
                    tab.removeTabAt(tab.getSelectedIndex());
                }
            }
        });
        //设置弹出菜单
        JPopupMenu menu = new JPopupMenu();
        for(int i = 0; i < 10; i++){
            menu.add(new JMenuItem("item "+i));
        }
        tab.setPopup(menu);

        frame.getContentPane().add(tab, BorderLayout.CENTER);
        frame.setSize(400, 320);
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        frame.setLocation((d.width - frame.getSize().width) / 2,
                          (d.height - frame.getSize().height) / 2);
        frame.setVisible(true);
    }
}

 

 

慢慢研究Swing还是很强大的，很多电信级别的网管软件就都是Swing做出来的。

 

同时发布在其他Blog。