Swing带关闭按钮的JTabelpane效果
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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
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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。
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同时发布在其他Blog。
1 楼 cclsw07 2011-01-24 再做个右键类似eclipse上右键的功能~~