/**
* 檔案名稱:ScrollFrame.java
* 環境: GNU/Linux Ubuntu 7.04 + Eclipse 3.2 + JDK 1.6
* 功能:滾動文本顯示面板Demo
* 版本:0.0.2.0
* 版本改動:簡化了0.0.1.0版本中的原始碼,修複了開始不能顯示文本的Bug
* 作者:88250
* 日期:2007.5.3
* E-mail & MDN: DL88250@gmail.com
* QQ:845765
*/
import java.awt.*;
import javax.swing.*;
public class ScrollFrame extends JFrame
{
public static String[] textContent = {"This", "is", "a", "simple", "Demo!"};
public ScrollFrame()
{
super("Scroll Text Display by 88250");
ScrollPane news = new ScrollPane();
setBounds(600, 300, 370, 200);
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel pane = new JPanel();
pane.setLayout(new GridLayout(1, 1, 0, 0));
pane.add(news);
setContentPane(pane);
setVisible(true);
}
public static void main(String[] arguments)
{
ScrollFrame scrollFrame = new ScrollFrame();
}
}
class ScrollPane extends JPanel implements Runnable
{
/**
* 參考縱座標,控制動畫效果
*/
int y;
public ScrollPane()
{
new Thread(this).start();
}
/*
* 線上程的run裡面,它每次都會使y改變,然後調用repaint()方法,此方法會調用paint再畫一次
* 再畫一次的時候,裡面的y座標是每次都會變的,這樣就形成了一種動畫效果
*/
public void run()
{
while (true)
{
y -= 1;
if (y < 0)
{
y = 201;
}
try
{
Thread.sleep(20);
}
catch (InterruptedException e)
{
}
repaint();
}
}
public void paint(Graphics comp)
{
Graphics2D com2D = (Graphics2D) comp;
Font type = new Font("monospaced", Font.BOLD, 14);
com2D.setFont(type);
com2D.setColor(getBackground());
com2D.fillRect(0, 0, getSize().width, getSize().height);
com2D.setColor(Color.black);
for (int i = 0; i < ScrollFrame.textContent.length; i++)
{
com2D.drawString(ScrollFrame.textContent[i], 5, y + (20 * i));
}
}
}