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Java實現類Windows導航欄

Java實現類Windows導航欄

在Windows系統中，通常都會有左側導航欄以供選擇，而Java架構下并沒有給我們提供同樣的組件，但是構建同樣的東西實際上是很容易的。

package org.loon.framework.swing.test;

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:

*

*

*

*

* 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();

// 分割窗體

private final JSplitPane split = new JSplitPane();

private final JScrollPane scroll;

// 折疊效果

public ExampleAccordion() {

super(new BorderLayout());

panel.setOpaque(true);

panel.setBackground(new Color(116, 149, 226));

// 滾動條

scroll = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,

JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

scroll.getVerticalScrollBar().setUnitIncrement(10);

scroll.getViewport().add(panel);

// 構建數據列表

List panelList = makeList();

// 設定監聽

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);

}

// 加載滾動條監聽

scroll.getViewport().addComponentListener(new ComponentAdapter() {

public void componentResized(ComponentEvent e) {

initComponent();

}

});

// 設定大小

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("辛苦遭逢起一經"));

pnl.add(new JLabel("干戈寥落四周星"));

pnl.add(new JLabel("山河破碎風飄絮"));

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實現類Windows導航欄");

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;

// 繪制漸變

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("宋體", 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);

}

效果圖：

posted on 2007-12-18 15:17 cping 閱讀(766) 評論(0) 收藏舉報

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