Java Swing实现类似QQ的停靠在桌面边缘时自动隐藏
代码语言：javascript复制import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.JFrame;
import javax.swing.Timer;
public class HideFrame extends JFrame implements ActionListener{
private Rectangle rect;
private int frameLeft;// 窗体离屏幕左边的距离
private int frameRight;// 窗体离屏幕右边的距离；
private int frameTop;// 窗体离屏幕顶部的距离
private int frameWidth; // 窗体的宽
private int frameHeight; // 窗体的高
private int screenXX;// 屏幕的宽度；
private Point point; // 鼠标在窗体的位置
private Timer timer = new Timer(10, this);
private int xx, yy;
private boolean isDraging = false;
public HideFrame(){
timer.start();
setTitle("窗体在屏幕边缘隐藏演示");
setSize(400, 300);
setUndecorated(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setAlwaysOnTop(true);
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
isDraging = true;
xx = e.getX();
yy = e.getY();
}
public void mouseReleased(MouseEvent e) {
isDraging = false;
}
});
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {
if (isDraging) {
int left = getLocation().x;
int top = getLocation().y;
setLocation(left e.getX() - xx, top e.getY() - yy);
repaint();
}
}
});
setVisible(true);
}
@Override
public void actionPerformed(ActionEvent arg0) {
frameLeft = getLocationOnScreen().x;
frameTop = getLocationOnScreen().y;
frameWidth = getWidth();
frameHeight = getHeight();
screenXX = java.awt.Toolkit.getDefaultToolkit().getScreenSize().width;
frameRight =screenXX- frameLeft - frameWidth;
// 获取窗体的轮廓
rect = new Rectangle(0, 0, frameWidth, frameHeight);
// 获取鼠标在窗体的位置
point =getMousePosition();
if (frameLeft < 0 && isPtInRect(rect, point)) {
setLocation(0, frameTop); // 隐藏在左边，鼠标指到后显示窗体；
} else if (frameLeft > -5 && frameLeft < 5 && !(isPtInRect(rect, point))) {
setLocation(frameLeft - frameWidth 1, frameTop); // 窗体移到左边边缘隐藏到左边；
} else if ((frameTop < 0 && frameLeft < 0) && isPtInRect(rect, point)) {// 窗体在左上角；
setLocation(0, 0);// 窗口隐藏了，鼠标指到他，就显示出来；
} else if ((frameTop > -5 && frameTop < 5) && (frameLeft > -5 && frameLeft < 5) && !(isPtInRect(rect, point))) {
// 当窗体的上边框与屏幕的顶端的距离小于5时 ，
// 并且鼠标不再窗体上将窗体隐藏到屏幕的顶端
setLocation(frameLeft - frameWidth 1, 1);
} else if ((frameTop < 0) && isPtInRect(rect, point)) {
setLocation(frameLeft, 0);// 窗口隐藏了，鼠标指到他，就显示出来；
} else if (frameTop > -5 && frameTop < 5 && !(isPtInRect(rect, point))) {
// 当窗体的上边框与屏幕的顶端的距离小于5时 ，
// 并且鼠标不再窗体上将窗体隐藏到屏幕的顶端
setLocation(frameLeft, 1 - frameHeight);
} else if (frameRight < 0 && isPtInRect(rect, point)) {
setLocation(screenXX - frameWidth 1, frameTop);// 隐藏在右边，鼠标指到后显示；
} else if (frameRight > -5 && frameRight < 5 && !(isPtInRect(rect, point))) {
setLocation(screenXX - 1, frameTop); // 窗体移到屏幕右边边缘隐藏到右边；
} else if (frameRight < 0 && frameTop < 0 && isPtInRect(rect, point)) {// 窗体在右上角；
setLocation(screenXX - frameWidth 1, 0);// 隐藏在右边，鼠标指到后显示；
} else if ((frameRight > -5 && frameRight < 5) && (frameTop > -5 && frameTop < 5) && !(isPtInRect(rect, point))) {
setLocation(screenXX - 1, 1); // 窗体移到屏幕右边边缘隐藏到右边；
}
}
/**
* 检测是否在矩形框内
* @param rect
* @param point
* @return
*/
public boolean isPtInRect(Rectangle rect, Point point) {
if (rect != null && point != null) {
int x0 = rect.x;
int y0 = rect.y;
int x1 = rect.width;
int y1 = rect.height;
int x = point.x;
int y = point.y;
return x >= x0 && x < x1 && y >= y0 && y < y1;
}
return false;
}
public static void main(String[] args){
HideFrame frame = new HideFrame();
}
}</pre> 
