Java用AWT實現的狀態欄

      AWT中沒有提供狀態欄工具，可以在Frame中添加一個Panel實現類似的功能。基本功能有創建狀態欄，添加指示器，移除指示器，改變指示器內容，獲得指示器內容，添加指示器鼠標消息響應，添加指示器右鍵彈出菜單，獲得對一個指示器的引用等。

 

 

import java.awt.Color; import java.awt.Component; import java.awt.FlowLayout; import java.awt.Frame; import java.awt.Graphics; import java.awt.Label; import java.awt.Panel; import java.awt.PopupMenu; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.util.LinkedList; public class StatusBar extends Panel { /** * 用AWT實現的狀態欄 版本：1.0 作者：鑫海 E-mail:[e-mail] 日期：2010.1.28 * */ private static final long serialVersionUID = 7224543356553391436L; private LinkedList<Label> list = new LinkedList<Label>(); Frame frame = null; /* * 用指定指示器個數初始化狀態欄 */ StatusBar(int ItemNum, Frame frame) { this.frame = frame; for (int ii = 0; ii < ItemNum; ii++) { list.add(new Label()); } InitStatusBar(); } /* * 用指定的字符串數組初始化狀態欄 */ StatusBar(String[] str, Frame frame) { this.frame = frame; for (int ii = 0; ii < str.length; ii++) { list.add(new Label(str[ii])); } InitStatusBar(); } /* * 改變一個指示器的文本 */ public void SetStatu(int index, String text) { list.get(index).setText(text); } /* * 獲得一個指示器的內容 */ public String GetStatuText(int index) { return GetStatu(index).getText(); } /* * 獲得對一個指示器的引用 */ public Label GetStatu(int index) { return list.get(index); } /* * 添加一個新的指示器 */ public void AddStatu(int index, String text){ list.add(index, new Label(text)); InitStatusBar(); } /* * 移除一個指示器 */ public void RemoveStatu(int index){ list.remove(index); InitStatusBar(); } /* * 對一個指示器增加鼠標消息響應 */ public void AddMouseListener(int index, MouseListener event) { GetStatu(index).addMouseListener(event); } /* * 對一個指示器增加鼠標右鍵菜單 */ public void AddPopupMenu(int index, final PopupMenu menu){ GetStatu(index).addMouseListener(new MouseAdapter(){ @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub if (e.getButton() == MouseEvent.BUTTON3){ menu.show((Component) menu.getParent(), e.getX(), e.getY()); } super.mouseClicked(e); } }); } /* * 初始化狀態欄 */ public void InitStatusBar() { this.setBackground(Color.lightGray); this.setLayout(new FlowLayout()); this.removeAll(); for (int ii = 0; ii < list.size(); ii++) { this.add(GetStatu(ii)); } frame.setVisible(true); } /* * 窗口繪圖(non-Javadoc) * * @see java.awt.Container#paint(java.awt.Graphics) */ @Override public void paint(Graphics g) { g.setColor(Color.black); g.drawLine(3, 0, this.getWidth() - 3, 0); for (int ii = 1; ii < list.size(); ii++) { Label label = GetStatu(ii); g.drawLine(label.getX() - 2, label.getY() + 2, label.getX() - 2, label.getY() + label.getHeight() - 2); } } }

 

 

測試代碼

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