How to get mouse over event in `Java Swing`
I have JPanel
a few components in it - a few JLabels
, JTextBoxes
, JComboBoxes
, JCheckBoxes
, etc.
I want to display a help popup if the user hovers over these components for say 3 seconds.
So far I have added MouseListener
to one of my Components and it displays the required popup and help. However, I can't seem to achieve this after a 3 second delay. As soon as the user moves the mouse to this area of the component, a popup will appear. This is very annoying as the components are practically unusable. I tried using MouseMotionListener
and had the following code in the method mouseMoved(MouseEvent e)
. Gives the same effect.
Any suggestion on how I can achieve the mouse hover effect - display the popup only after a 3 second delay?
Example code: (mouse input method)
private JTextField _textHost = new JTextField();
this._textHost().addMouseListener(this);
@Override
public void mouseEntered(MouseEvent e) {
if(e.getSource() == this._textHost())
{
int reply = JOptionPane.showConfirmDialog(this, "Do you want to see the related help document?", "Show Help?", JOptionPane.YES_NO_OPTION);
if(reply == JOptionPane.YES_OPTION)
{
//Opens a browser with appropriate link.
this.get_configPanel().get_GUIApp().openBrowser("http://google.com");
}
}
}
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Use Timer
in mouseEntered()
. Here's a working example:
public class Test {
private JFrame frame;
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Test test = new Test();
test.createUI();
}
});
}
private void createUI() {
frame = new JFrame();
JLabel label = new JLabel("Test");
label.addMouseListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent me) {
startTimer();
}
});
frame.getContentPane().add(label);
frame.pack();
frame.setVisible(true);
}
private void startTimer() {
TimerTask task = new TimerTask() {
@Override
public void run() {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JOptionPane.showMessageDialog(frame, "Test");
}
});
}
};
Timer timer = new Timer(true);
timer.schedule(task, 3000);
}
}
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