how to detect if someone clicks on a jpanel in java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TestFrame extends JFrame{
public TestFrame(int size){
JPanel content = new JPanel(new GridLayout(size, size));
JPanel[] panel = new JPanel[size * size];
PanelListener listener = new PanelListener();
for(int i = 0; i < panel.length; i++){
panel[i] = new JPanel();
panel[i].setBackground(Color.white);
panel[i].addMouseListener(listener);
content.add(panel[i]);
}
this.add(content);
}
// MouseListener offers the method mouseClicked(MouseEvent e)
private class PanelListener implements MouseListener {
@Override
public void mouseClicked(MouseEvent event) {
/* source is the object that got clicked
*
* If the source is actually a JPanel,
* then will the object be parsed to JPanel
* since we need the setBackground() method
*/
Object source = event.getSource();
if(source instanceof JPanel){
JPanel panelPressed = (JPanel) source;
panelPressed.setBackground(Color.blue);
}
}
@Override
public void mouseEntered(MouseEvent arg0) {}
@Override
public void mouseExited(MouseEvent arg0) {}
@Override
public void mousePressed(MouseEvent arg0) {}
@Override
public void mouseReleased(MouseEvent arg0) {}
}
public static void main(String[] args){
TestFrame theGUI = new TestFrame(8);
theGUI.setTitle("Grid");
theGUI.setVisible(true);
theGUI.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
theGUI.setSize(400,400);
}
}