JAVA实现类Windows导航栏

package windows.beautify; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Font; import java.awt.GradientPaint; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GridLayout; import java.awt.Insets; import java.awt.Rectangle; import java.awt.event.ComponentAdapter; import java.awt.event.ComponentEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import javax.swing.BorderFactory; import javax.swing.ButtonGroup; import javax.swing.JCheckBox; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.JSplitPane; import javax.swing.SpringLayout; import javax.swing.WindowConstants; import javax.swing.border.Border; /** *//** * * Title: LoonFramework * * * Description: * Copyright: Copyright (c) 2007 * * * Company: LoonFramework * * @author chenpeng * @email：ceponline@yahoo.com.cn * @version 0.1 */ public class ExampleAccordion extends JPanel { /** *//** * */ private static final long serialVersionUID = 1L; private final JPanel panel = new JPanel(); private final JLabel label = new JLabel(); // 分割窗体 private final JSplitPane split = new JSplitPane(); private final JScrollPane scroll; // 折叠效果 public ExampleAccordion() { super(new BorderLayout()); panel.setOpaque(true); panel.setBackground(new Color(116, 149, 226)); // 滚动条 scroll = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); scroll.getVerticalScrollBar().setUnitIncrement(10); scroll.getViewport().add(panel); // 构建数据列表 List panelList = makeList(); // 设定监听 accordionListener exr = new accordionListener() { public void accordionStateChanged(accordionEvent e) { initComponent(); } }; for (Iterator it = panelList.iterator(); it.hasNext();) { AccordionPanel epl = (AccordionPanel) it.next(); addComponent(epl); epl.addaccordionListener(exr); } // 加载滚动条监听 scroll.getViewport().addComponentListener(new ComponentAdapter() { public void componentResized(ComponentEvent e) { initComponent(); } }); // 设定大小 label.setPreferredSize(new Dimension(200, 260)); scroll.setPreferredSize(new Dimension(200, 260)); scroll.setMinimumSize(new Dimension(200, 260)); split.setLeftComponent(scroll); split.setRightComponent(label); split.setDividerSize(1); split.setBackground(Color.WHITE); add(split, BorderLayout.CENTER); } public void initComponent() { Rectangle re = scroll.getViewport().getViewRect(); Insets ins = panel.getInsets(); int cw = (int) re.getWidth() - ins.left - ins.right - 20; int ch = 10; Component[] list = panel.getComponents(); for (int i = 0; i < list.length; i++) { JComponent tmp = (JComponent) list[i]; int th = tmp.getPreferredSize().height; tmp.setPreferredSize(new Dimension(cw, th)); ch = ch + th + 10; } panel.setPreferredSize(new Dimension((int) re.getWidth(), ch + ins.top + ins.bottom)); panel.revalidate(); } public void addComponent(Component label) { SpringLayout layout = new SpringLayout(); Component[] list = panel.getComponents(); if (list.length == 0) { layout.putConstraint(SpringLayout.WEST, label, 10, SpringLayout.WEST, panel); layout.putConstraint(SpringLayout.NORTH, label, 10, SpringLayout.NORTH, panel); } else { JComponent cmp = null; for (int i = 0; i < list.length; i++) { JComponent tmp = (JComponent) list[i]; layout.putConstraint(SpringLayout.WEST, tmp, 10, SpringLayout.WEST, panel); if (cmp == null) { layout.putConstraint(SpringLayout.NORTH, tmp, 10, SpringLayout.NORTH, panel); } else { layout.putConstraint(SpringLayout.NORTH, tmp, 10, SpringLayout.SOUTH, cmp); } cmp = tmp; } layout.putConstraint(SpringLayout.WEST, label, 10, SpringLayout.WEST, panel); layout.putConstraint(SpringLayout.NORTH, label, 10, SpringLayout.SOUTH, cmp); } panel.add(label); panel.setLayout(layout); initComponent(); } private List makeList() { List panelList = new ArrayList(); panelList.add(new AccordionPanel("列表1") { /** *//** * */ private static final long serialVersionUID = 1L; public JPanel makePanel() { JPanel pnl = new JPanel(new GridLayout(0, 1)); JCheckBox c1 = new JCheckBox("aaaaaa"); JCheckBox c2 = new JCheckBox("bbbbbb"); c1.setOpaque(false); c2.setOpaque(false); pnl.add(c1); pnl.add(c2); pnl.setSize(new Dimension(0, 60)); pnl.setBorder(BorderFactory.createEmptyBorder(5, 15, 5, 15)); return pnl; } }); panelList.add(new AccordionPanel("列表2") { /** *//** * */ private static final long serialVersionUID = 1L; public JPanel makePanel() { JPanel pnl = new JPanel(new GridLayout(0, 1)); pnl.add(new JLabel("辛苦遭逢起一经")); pnl.add(new JLabel("干戈寥落四周星")); pnl.add(new JLabel("山河破碎风飘絮")); pnl.add(new JLabel("身世浮沉雨打萍")); pnl.setSize(new Dimension(0, 100)); pnl.setBorder(BorderFactory.createEmptyBorder(5, 15, 5, 15)); return pnl; } }); panelList.add(new AccordionPanel("列表3") { /** *//** * */ private static final long serialVersionUID = 1L; public JPanel makePanel() { JPanel pnl = new JPanel(new GridLayout(0, 1)); JRadioButton b1 = new JRadioButton("aa"); JRadioButton b2 = new JRadioButton("bb"); JRadioButton b3 = new JRadioButton("cc"); b1.setOpaque(false); b2.setOpaque(false); b3.setOpaque(false); pnl.add(b1); pnl.add(b2); pnl.add(b3); ButtonGroup bg = new ButtonGroup(); bg.add(b1); bg.add(b2); bg.add(b3); b1.setSelected(true); pnl.setSize(new Dimension(0, 80)); pnl.setBorder(BorderFactory.createEmptyBorder(5, 15, 5, 15)); return pnl; } }); return panelList; } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { createUI(); } }); } public static void createUI() { JFrame frame = new JFrame("JAVA实现类Windows导航栏"); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.getContentPane().add(new ExampleAccordion()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } } class accordionEvent extends java.util.EventObject { /** *//** * */ private static final long serialVersionUID = 1L; public accordionEvent(Object source) { super(source); } } interface accordionListener { public void accordionStateChanged(accordionEvent e); } abstract class AccordionPanel extends JPanel { abstract public JPanel makePanel(); private final String _title; private final JLabel label; private final JPanel panel; private boolean openFlag = false; public AccordionPanel(String title) { super(new BorderLayout()); _title = title; label = new JLabel("↓ " + title) { /** *//** * */ private static final long serialVersionUID = 1L; protected void paintComponent(Graphics g) { Graphics2D g2 = (Graphics2D) g; // 绘制渐变 g2.setPaint(new GradientPaint(50, 0, Color.WHITE, getWidth(), getHeight(), new Color(199, 212, 247))); g2.fillRect(0, 0, getWidth(), getHeight()); super.paintComponent(g); } }; label.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent evt) { openFlag = !openFlag; initPanel(); fireaccordionEvent(); } }); label.setForeground(new Color(33, 93, 198)); label.setFont(new Font("宋体", 1, 12)); label.setBorder(BorderFactory.createEmptyBorder(2, 5, 2, 2)); panel = makePanel(); panel.setOpaque(true); Border outBorder = BorderFactory.createMatteBorder(0, 2, 2, 2, Color.WHITE); Border inBorder = BorderFactory.createEmptyBorder(10, 10, 10, 10); Border border = BorderFactory.createCompoundBorder(outBorder, inBorder); panel.setBorder(border); panel.setBackground(new Color(240, 240, 255)); add(label, BorderLayout.NORTH); } public boolean isSelected() { return openFlag; } public void setSelected(boolean flg) { openFlag = flg; initPanel(); } protected void initPanel() { if (isSelected()) { label.setText("↑ " + _title); add(panel, BorderLayout.CENTER); setPreferredSize(new Dimension(getSize().width, label.getSize().height + panel.getSize().height)); } else { label.setText("↓ " + _title); remove(panel); setPreferredSize(new Dimension(getSize().width, label.getSize().height)); } revalidate(); } protected ArrayList accordionListenerList = new ArrayList(); public void addaccordionListener(accordionListener listener) { if (!accordionListenerList.contains(listener)) accordionListenerList.add(listener); } public void removeaccordionListener(accordionListener listener) { accordionListenerList.remove(listener); } public void fireaccordionEvent() { List list = (List) accordionListenerList.clone(); Iterator it = list.iterator(); accordionEvent e = new accordionEvent(this); while (it.hasNext()) { accordionListener listener = (accordionListener) it.next(); listener.accordionStateChanged(e); } } }