我在JFrame上有2个Jpanel（leftpanel和rightpanel）。当鼠标移至2个面板的交叉区域时，如何更改光标？
到目前为止，我尝试过：
...
public void mouseMoved(MouseEvent e) {
if (leftpanel.contains(e.getPoint()) && rightpanel.contains(e.getPoint())){
frame.setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
}
else{ frame.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
};
但它没有用..
最佳答案
您的问题是如何检测两个面板的交点并更改光标。这是一个如何做的例子
public static void overlapTest() {
final JPanel p1 = new JPanel();
final JPanel p2 = new JPanel();
p1.setBackground(Color.RED);
p2.setBackground(Color.BLUE);
final JPanel container = new JPanel();
container.setLayout(null);
container.add(p1);
container.add(p2);
p1.setBounds(0,0,120,100);
p2.setBounds(80,0,120,100);
Dimension size = new Dimension(200,100);
container.setPreferredSize(size);
container.addMouseMotionListener(new MouseMotionListener() {
@Override
public void mouseDragged(MouseEvent arg0) {
}
@Override
public void mouseMoved(MouseEvent e) {
Point pt1 = e.getPoint();
pt1.translate(-p1.getX(), -p1.getY());
Point pt2 = e.getPoint();
pt2.translate(-p2.getX(), -p2.getY());
if (p1.contains(pt1) && p2.contains(pt2)) {
System.out.println("both contain: " + e.getPoint());
container.setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
}
else{
container.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
};
}
});
}
关于java - 当鼠标移至2个面板的交叉区域时，更改光标，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/10220540/