[英]Changing value of boolean when mouse cursor hovers over a JButton
I have a button that will change from black to gray when you hover over, I do this with setRolloverIcon(ImageIcon);
我有一个按钮,当您将鼠标悬停在上面时,它会从黑色变为灰色,这是通过setRolloverIcon(ImageIcon);
. 。 Is there any easy way to make a boolean equals to true while the mouse cursor hovers over the JButton or would I have to use a MouseMotionListener to check the position of the mouse cursor? 当鼠标光标悬停在JButton上时,是否有任何简单的方法可以使布尔值等于true,还是我必须使用MouseMotionListener来检查鼠标光标的位置?
Is there any easy way to make a boolean equals to true while the mouse cursor hovers over the JButton 有什么简单的方法可以使鼠标悬停在JButton上时使布尔值等于true
you can to add ChangeListener
to ButtonModel
, eg 您可以将ChangeListener
添加到ButtonModel
,例如
JButton.getModel().addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
ButtonModel model = (ButtonModel) e.getSource();
if (model.isRollover()) {
//do something with Boolean variable
} else {
}
}
});
This is an example of using the ButtonModel
: 这是使用ButtonModel
的示例:
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class TestButtons {
protected void createAndShowGUI() {
JFrame frame = new JFrame("Test button");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JButton button = new JButton("Hello");
button.getModel().addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
if (button.getModel().isRollover()) {
button.setText("World");
} else {
button.setText("Hello");
}
}
});
frame.add(button);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestButtons().createAndShowGUI();
}
});
}
}
Try this: 尝试这个:
button.addMouseListener(new MouseListener() {
public void mouseEntered(MouseEvent e) {
yourBoolean = true;
}
}
good luck 祝好运
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