Java swing hold buttons
- by Simon Charette
Hi, I'm trying to create a subclass of JButton or AbstractButton that would call specified .actionPerformed as long as the mouse is held down on the button.
So far I was thinking of extending JButton, adding a mouse listener on creation (inside constructor) and calling actionPerformed while the mouse is down. So far i came up with that but I was wondwering if I was on the right track and if so, how to correctly implement the "held down" logic.
package components;
import java.awt.event.ActionEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.JButton;
public class HoldButton extends JButton {
private class HeldDownMouseListener implements MouseListener {
private boolean mouseIsHeldDown;
private HoldButton button;
private long millis;
public HeldDownMouseListener(HoldButton button, long millis) {
this.button = button;
this.millis = millis;
}
@Override
public void mouseClicked(MouseEvent arg0) { }
@Override
public void mouseEntered(MouseEvent arg0) { }
@Override
public void mouseExited(MouseEvent arg0) { }
@Override
public void mousePressed(MouseEvent arg0) {
mouseIsHeldDown = true;
// This should be run in a sub thread?
// while (mouseIsHeldDown) {
// button.fireActionPerformed(new ActionEvent(button, ActionEvent.ACTION_PERFORMED, "heldDown"));
// try {
// Thread.sleep(millis);
// } catch (InterruptedException e) {
// e.printStackTrace();
// continue;
// }
// }
}
@Override
public void mouseReleased(MouseEvent arg0) {
mouseIsHeldDown = false;
}
}
public HoldButton() {
addHeldDownMouseListener();
}
public HoldButton(Icon icon) {
super(icon);
addHeldDownMouseListener();
}
public HoldButton(String text) {
super(text);
addHeldDownMouseListener();
}
public HoldButton(Action a) {
super(a);
addHeldDownMouseListener();
}
private void addHeldDownMouseListener() {
addMouseListener(new HeldDownMouseListener(this, 300));
}
}
Thanks a lot for your time.
