How to get Mouse hover event in `Java Swing`
Use a 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);
}
}
TinyStrides
Updated on August 20, 2020Comments
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TinyStrides over 3 years
I have a
JPanel
with multiple components in it - like a fewJLabels
,JTextBoxes
,JComboBoxes
,JCheckBoxes
etc.I want to display a pop up help window if the user hovers over these components for say 3 secs.
So far I added a
MouseListener
to one of my Components and it does display the required pop up and help. However I can't achieve it after 3 sec delay. As soon as the user moves the mouse to through that area of the component the pop up displays. This is very annoying as the components are almost unusable. I have tried usingMouseMotionListener
and having the below code inmouseMoved(MouseEvent e)
method. Gives the same effect.Any suggestion on how can I achieve the mouse hover effect - to display the pop up only after 3 sec delay?
Sample Code:(Mouse Entered 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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StanislavL over 9 yearsGuess the timer should be stop after leaving mouse.