2012-03-22 20:40:05|?次阅读|上传:wustguangh【已有?条评论】发表评论
关键词:Java, Swing, 界面设计|来源:唯设编程网
在Windows程序中,状态栏起着提示用户的功能,比如提示用户当前程序的状态,鼠标位置等,合理的使用状态栏能够大大改善系统的用户体验,在使用Java语言的Swing客户端程序中,状态栏并不是Swing提供的一个标准控件。本文将介绍一种实现Swing程序状态栏的方案,本方法实现了立体的状态栏效果,并且在右下方模拟的常见Windows程序的三角形小图标。
首先给出程序的运行效果:

下面是具体的Java源代码:
Java示例:
package Test;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.SystemColor;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* Swing状态栏测试例子
*
*/
public class StatusBarSimulator {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setBounds(200, 200, 600, 200);
frame.setTitle("Status bar simulator");
Container contentPane = frame.getContentPane();
contentPane.setLayout(new BorderLayout());
StatusBar statusBar = new StatusBar();
contentPane.add(statusBar, BorderLayout.SOUTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
/**
* Swing状态栏Panel
*
*/
class StatusBar extends JPanel {
private static final long serialVersionUID = 1L;
public StatusBar() {
setLayout(new BorderLayout());
setPreferredSize(new Dimension(10, 23));
JPanel rightPanel = new JPanel(new BorderLayout());
rightPanel.add(new JLabel(new AngledLinesWindowsCornerIcon()),
BorderLayout.SOUTH);
rightPanel.setOpaque(false);
add(rightPanel, BorderLayout.EAST);
setBackground(SystemColor.control);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
//状态栏顶部阴影
int y = 0;
g.setColor(new Color(156, 154, 140));
g.drawLine(0, y, getWidth(), y);
y++;
g.setColor(new Color(196, 194, 183));
g.drawLine(0, y, getWidth(), y);
y++;
g.setColor(new Color(218, 215, 201));
g.drawLine(0, y, getWidth(), y);
y++;
g.setColor(new Color(233, 231, 217));
g.drawLine(0, y, getWidth(), y);
//状态栏底部阴影
y = getHeight() - 3;
g.setColor(new Color(233, 232, 218));
g.drawLine(0, y, getWidth(), y);
y++;
g.setColor(new Color(233, 231, 216));
g.drawLine(0, y, getWidth(), y);
y++;
g.setColor(new Color(221, 221, 220));
g.drawLine(0, y, getWidth(), y);
}
}
/**
* 状态栏右侧的图标
*
*/
class AngledLinesWindowsCornerIcon implements Icon {
private static final Color WHITE_LINE_COLOR = new Color(255, 255, 255);
private static final Color GRAY_LINE_COLOR = new Color(172, 168, 153);
private static final int WIDTH = 13;
private static final int HEIGHT = 13;
public int getIconHeight() {
return WIDTH;
}
public int getIconWidth() {
return HEIGHT;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.setColor(WHITE_LINE_COLOR);
g.drawLine(0, 12, 12, 0);
g.drawLine(5, 12, 12, 5);
g.drawLine(10, 12, 12, 10);
g.setColor(GRAY_LINE_COLOR);
g.drawLine(1, 12, 12, 1);
g.drawLine(2, 12, 12, 2);
g.drawLine(3, 12, 12, 3);
g.drawLine(6, 12, 12, 6);
g.drawLine(7, 12, 12, 7);
g.drawLine(8, 12, 12, 8);
g.drawLine(11, 12, 12, 11);
g.drawLine(12, 12, 12, 12);
}
}
到此,一个包含状态栏的Swing窗体演示程序便完成了,本实例中使用了JPanel模拟窗体的状态栏,通过边界布局模式将状态栏放在窗体的底部。同时,定义了一个继承自Icon的类AngledLinesWindowsCornerIcon实现了右下角的小图标。