学步园

      AWT中没有提供状态栏工具，可以在Frame中添加一个Panel实现类似的功能。基本功能有创建状态栏，添加指示器，移除指示器，改变指示器内容，获得指示器内容，添加指示器鼠标消息响应，添加指示器右键弹出菜单，获得对一个指示器的引用等。

import java.awt.Color;<br /> import java.awt.Component;<br /> import java.awt.FlowLayout;<br /> import java.awt.Frame;<br /> import java.awt.Graphics;<br /> import java.awt.Label;<br /> import java.awt.Panel;<br /> import java.awt.PopupMenu;<br /> import java.awt.event.MouseAdapter;<br /> import java.awt.event.MouseEvent;<br /> import java.awt.event.MouseListener;<br /> import java.util.LinkedList;</p> <p>public class StatusBar extends Panel {</p> <p> /**<br /> * 用AWT实现的状态栏 版本：1.0 作者：鑫海 E-mail:lingdushanke@163.com 日期：2010.1.28<br /> *<br /> */<br /> private static final long serialVersionUID = 7224543356553391436L;</p> <p> private LinkedList<Label> list = new LinkedList<Label>();<br /> Frame frame = null;</p> <p> /*<br /> * 用指定指示器个数初始化状态栏<br /> */<br /> StatusBar(int ItemNum, Frame frame) {<br /> this.frame = frame;<br /> for (int ii = 0; ii < ItemNum; ii++) {<br /> list.add(new Label());<br /> }<br /> InitStatusBar();<br /> }</p> <p> /*<br /> * 用指定的字符串数组初始化状态栏<br /> */<br /> StatusBar(String[] str, Frame frame) {<br /> this.frame = frame;<br /> for (int ii = 0; ii < str.length; ii++) {<br /> list.add(new Label(str[ii]));<br /> }<br /> InitStatusBar();<br /> }</p> <p> /*<br /> * 改变一个指示器的文本<br /> */<br /> public void SetStatu(int index, String text) {<br /> list.get(index).setText(text);<br /> }</p> <p> /*<br /> * 获得一个指示器的内容<br /> */<br /> public String GetStatuText(int index) {<br /> return GetStatu(index).getText();<br /> }</p> <p> /*<br /> * 获得对一个指示器的引用<br /> */<br /> public Label GetStatu(int index) {<br /> return list.get(index);<br /> }</p> <p> /*<br /> * 添加一个新的指示器<br /> */<br /> public void AddStatu(int index, String text){<br /> list.add(index, new Label(text));<br /> InitStatusBar();<br /> }</p> <p> /*<br /> * 移除一个指示器<br /> */<br /> public void RemoveStatu(int index){<br /> list.remove(index);<br /> InitStatusBar();<br /> }</p> <p> /*<br /> * 对一个指示器增加鼠标消息响应<br /> */<br /> public void AddMouseListener(int index, MouseListener event) {<br /> GetStatu(index).addMouseListener(event);<br /> }</p> <p> /*<br /> * 对一个指示器增加鼠标右键菜单<br /> */<br /> public void AddPopupMenu(int index, final PopupMenu menu){<br /> GetStatu(index).addMouseListener(new MouseAdapter(){<br /> @Override<br /> public void mouseClicked(MouseEvent e) {<br /> // TODO Auto-generated method stub<br /> if (e.getButton() == MouseEvent.BUTTON3){<br /> menu.show((Component) menu.getParent(), e.getX(), e.getY());<br /> }<br /> super.mouseClicked(e);<br /> }<br /> });<br /> }</p> <p> /*<br /> * 初始化状态栏<br /> */<br /> public void InitStatusBar() {</p> <p> this.setBackground(Color.lightGray);<br /> this.setLayout(new FlowLayout());</p> <p> this.removeAll();<br /> for (int ii = 0; ii < list.size(); ii++) {<br /> this.add(GetStatu(ii));<br /> }</p> <p> frame.setVisible(true);<br /> }</p> <p> /*<br /> * 窗口绘图(non-Javadoc)<br /> *<br /> * @see java.awt.Container#paint(java.awt.Graphics)<br /> */<br /> @Override<br /> public void paint(Graphics g) {<br /> g.setColor(Color.black);<br /> g.drawLine(3, 0, this.getWidth() - 3, 0);<br /> for (int ii = 1; ii < list.size(); ii++) {<br /> Label label = GetStatu(ii);<br /> g.drawLine(label.getX() - 2, label.getY() + 2, label.getX() - 2,<br /> label.getY() + label.getHeight() - 2);<br /> }<br /> }<br /> }</p> <p>

测试代码

import java.awt.BorderLayout;<br /> import java.awt.Button;<br /> import java.awt.Frame;<br /> import java.awt.MenuItem;<br /> import java.awt.PopupMenu;<br /> import java.awt.event.MouseAdapter;<br /> import java.awt.event.MouseEvent;<br /> import java.awt.event.WindowAdapter;<br /> import java.awt.event.WindowEvent;</p> <p>public class TestStatusBar extends Frame{</p> <p> TestStatusBar(){<br /> this.setSize(400, 300);</p> <p> this.setLayout(new BorderLayout());</p> <p> final StatusBar statu = new StatusBar(4, this);<br /> statu.GetStatu(0).setText("num1");<br /> statu.SetStatu(1, "num2");<br /> statu.GetStatu(2).setText("num3");</p> <p> Button but = new Button("button");<br /> this.add(but, BorderLayout.NORTH);<br /> but.addMouseListener(new MouseAdapter(){<br /> @Override<br /> public void mouseClicked(MouseEvent e) {<br /> // TODO Auto-generated method stub<br /> statu.AddStatu(2, "tttttttt");<br /> super.mouseClicked(e);<br /> }<br /> });</p> <p> final PopupMenu menu = new PopupMenu("menu");<br /> MenuItem mi = new MenuItem("Test");<br /> menu.add(mi);<br /> statu.GetStatu(3).add(menu);<br /> statu.GetStatu(3).setText("hah");<br /> statu.AddPopupMenu(3, menu);<br /> this.add(statu, BorderLayout.SOUTH);</p> <p> /* String[] str = new String[2];<br /> str[0] = "num1";<br /> str[1] = "num2";<br /> StatusBar statu = new StatusBar(str, this);<br /> this.add(statu, BorderLayout.SOUTH);*/</p> <p> this.pack();</p> <p> this.addWindowListener(new WindowAdapter(){<br /> @Override<br /> public void windowClosing(WindowEvent e) {<br /> // TODO Auto-generated method stub<br /> System.exit(0);<br /> super.windowClosing(e);<br /> }<br /> });<br /> this.setVisible(true);<br /> }</p> <p> public static void main(String[] arge){<br /> new TestStatusBar();<br /> }<br /> }</p> <p>