介绍
上网看视频的时候都看见过，一个视频滚动的窗体，通过点击按钮视频可以产生横向滚动效果，下面自己用swing写了一个类似的功能窗口。
效果图：
代码
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| import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;
import javax.swing.Timer;
public class RollingFrame extends JFrame{
private static final int LIST_CELL_WIDTH = 120;// 每次滚一次的 刻度
private static int y = 0;// 滚动轴滑动的刻度
private JScrollPane sp;
private static int index = 0; // 用来 计数，算的开始滚动到最后滚动的y
private int currentResolution = 20; // 动画效果，50毫秒
private Timer timer1 = null, timer2 = null;// 两个timer 用于 操作两个监听事件
private int moveMinX;// 每次滚动的开始刻度
private int moveMaxX;// 每次滚动的结束刻度
private static int max;// 计算滚动面板的滚动轴的最大滑动刻度
private JPanel j,centerPanel,statusPanel,scollPanel; // 定义一个面板。用于将节点添加到面板上，并将j天津到滚动面板上
private JButton leftButton,rightButton;
public RollingFrame()
{
// TODO Auto-generated constructor stub
setBackground(Color.WHITE);
initGui();
setTitle("横向滚动");
setBounds(100, 100, 365, 80);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
private void initGui()
{
// 初始化操作，将各个组件和节点添加到面板中
setLayout(new BorderLayout(0, 0));
add(getLeftButton(), BorderLayout.WEST);
add(getRightButton(), BorderLayout.EAST);
add(getSp(), BorderLayout.CENTER);
}
// 定义滚动面板，将j 和滚动条添加进去
private JScrollPane getSp(){
if(j==null){
j = new JPanel();
j.setBackground(Color.WHITE);
j.setLayout(new FlowLayout(FlowLayout.LEFT, 5, 5));
for(int i=0;i<15;i++){
j.add(new JButton("按钮："+i));
}
sp = new JScrollPane(j, ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
sp.setBackground(Color.WHITE);
}
return sp;
}
// 得到向左滑动按钮
public JButton getLeftButton()
{
if (leftButton == null)
{
leftButton = new JButton("<<");
leftButton.setBorder(null);
leftButton.setContentAreaFilled(false);
leftButton.setFocusPainted(false);
}
leftButton.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
max = sp.getHorizontalScrollBar().getMaximum()
- sp.getHorizontalScrollBar().getModel().getExtent();// 得到滚动轴
// 最大滑动刻度
moveMinX = (index - 1) * LIST_CELL_WIDTH > max ? max
: (index - 1) * LIST_CELL_WIDTH;
moveMaxX = index * LIST_CELL_WIDTH > max ? max : index
* LIST_CELL_WIDTH;
if (moveMaxX > 0)
{
if (timer1 == null)
{
timer1 = new Timer(currentResolution, action1);
}
if (!timer1.isRunning())
{
timer1.start();
}
}
}
});
leftButton.setPreferredSize(new Dimension(48, 50));
return leftButton;
}
// 得到向右滑动按钮
public JButton getRightButton()
{
if (rightButton == null)
{
rightButton = new JButton(">>");
rightButton.setBorder(null);
rightButton.setContentAreaFilled(false);
rightButton.setFocusPainted(false);
}
rightButton.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
max = sp.getHorizontalScrollBar().getMaximum()
- sp.getHorizontalScrollBar().getModel().getExtent();// 得到滚动轴
// 最大滑动刻度
moveMinX = index * LIST_CELL_WIDTH > 0 ? index
* LIST_CELL_WIDTH : 0;
moveMaxX = moveMinX + LIST_CELL_WIDTH > max ? max : moveMinX
+ LIST_CELL_WIDTH;
if (moveMinX < max)
{
if (timer2 == null)
{
timer2 = new Timer(currentResolution, action2);
}
if (!timer2.isRunning())
{
timer2.start();
}
}
}
});
rightButton.setPreferredSize(new Dimension(48, 50));
return rightButton;
}
private ActionListener action1 = new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
y -= 8;
if (y <= moveMinX)
{
y = moveMinX;
timer1.stop();
if (index > 0)
{
index--;
}
}
sp.getHorizontalScrollBar().setValue(y);
}
};
private ActionListener action2 = new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
y += 8;
if (y >= moveMaxX)
{
y = moveMaxX;
timer2.stop();
index++;
}
sp.getHorizontalScrollBar().setValue(y);
}
};
public static void main(String[] args) {
new RollingFrame();
}
}
|
