java 使用 JButton 将鼠标悬停在事件上
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Mouse over events with JButton
提问by Van-Sama
I'm trying to create a custom mouse over event on a JButton. The reason being that my JButton is currently an image, so I had to remove all the borders and animations and what not. so I did this:
我正在尝试在 JButton 上创建自定义鼠标悬停事件。原因是我的 JButton 目前是一个图像，所以我不得不删除所有的边框和动画，什么都没有。所以我这样做了：
btnSinglePlayer.setOpaque(false);
btnSinglePlayer.setContentAreaFilled(false);
btnSinglePlayer.setBorderPainted(false);
And that works perfect to only display the image, and the button does in fact work. I want to know if there's any pre-built methods perhaps that can do this, or how I would go about learning to do what I want.
这非常适合仅显示图像，并且按钮确实有效。我想知道是否有任何预先构建的方法可以做到这一点，或者我将如何学习做我想做的事。
More specifically, what I want the image to do when I mouse over is for it to get just a bit bigger.
更具体地说，当我将鼠标悬停在图像上时，我希望图像变大一点。
I have tried these so far, and did nothing:
到目前为止，我已经尝试过这些，但什么也没做：
btnSinglePlayer.setRolloverIcon(singlePlayerButton);
btnSinglePlayer.setPressedIcon(singlePlayerButton);
采纳答案by mKorbel
you can to use ButtonModel with ChangeListener
(by default) for JButtons JComponentsthere no reason to use
Mouse(Xxx)Listeneror itsMouseEvent, all those events are implemented and correctly
您可以将ButtonModel 与 ChangeListener一起使用
（默认情况下）对于JButtons JComponents没有理由使用
Mouse(Xxx)Listener或它的MouseEvent，所有这些事件都被正确地实现
回答by Vishal K
As an alternative You can achieve this by registering MouseListenerto the JButtonand override mouseEntered(),mouseExited(), mousePressed()and mouseReleased()method.For Example:
作为替代可以通过注册实现这个MouseListener到JButton并覆盖mouseEntered()，mouseExited()，mousePressed()和mouseReleased()method.For实施例：
final ImageIcon icon1 = new ImageIcon("tray.gif");
final JButton button = new JButton(icon1);
final int width = icon1.getIconWidth();
final int height = icon1.getIconHeight();
button.addMouseListener(new MouseAdapter()
{
public void mouseEntered(MouseEvent evt)
{
icon1.setImage((icon1.getImage().getScaledInstance(width + 10, height,Image.SCALE_SMOOTH)));
//button.setIcon(icon1);
}
public void mouseExited(MouseEvent evt)
{
icon1.setImage((icon1.getImage().getScaledInstance(width , height,Image.SCALE_SMOOTH)));
}
public void mousePressed(MouseEvent evt)
{
icon1.setImage((icon1.getImage().getScaledInstance(width + 5, height,Image.SCALE_SMOOTH)));
}
public void mouseReleased(MouseEvent evt)
{
icon1.setImage((icon1.getImage().getScaledInstance(width + 10, height,Image.SCALE_SMOOTH)));
}
});
button.setOpaque(false);
button.setContentAreaFilled(false);
button.setBorderPainted(false);
