How to add an ActionListener to customize the component
I created a component and want to add ActionListener
to customize the component.
I want to create a component like JButton
and show an actionPerformed
event in Events
Dialog in design view.
JBaseComponent
the class will be derived from JComponent
.
Code:
public class JCButton extends JBaseComponent implements ActionListener,ItemSelectable,ChangeListener{
private JButton _button=new JButton();
private ActionEvent _actevent=new ActionEvent(this,ActionEvent.ACTION_PERFORMED,"");
public JCButton() {
super();
_button.setPreferredSize(new Dimension(105, 25));
_button.setFocusTraversalKeysEnabled(false);
_button.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
JComponent c = (JComponent) e.getSource();
TransferHandler handler = c.getTransferHandler();
handler.exportAsDrag(c, e, TransferHandler.COPY);
}
});
_button.setTransferHandler(new TransferHandler("btn"));
setColorFocus(false);
_button.addActionListener(this);
actionPerformed(_actevent);
addActionListener(this);
revalidate();
repaint();
add(_button);
}
public void setText(String txt){
_button.setText(txt);
}
public void setIcon(Icon ico){
_button.setIcon(ico);
}
public void addActionListener(ActionListener act){
_button.addActionListener(act);
}
@Override
public void actionPerformed(ActionEvent e) {
}
@Override
public Object[] getSelectedObjects() {
return null;
}
@Override
public void addItemListener(ItemListener l) {
}
@Override
public void removeItemListener(ItemListener l) {
}
@Override
public void stateChanged(ChangeEvent e) {
}
}
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If you really can't use JButton
to do this, your next best option expands AbstractButton
, which includes the EventListenerList
plumbing mentioned here , For example,
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.AbstractButton;
import javax.swing.Action;
import javax.swing.DefaultButtonModel;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.plaf.ButtonUI;
/** @see https://stackoverflow.com/a/14429304/230513 */
public class JCButtonTest {
private void display() {
JFrame f = new JFrame("JCButtonTest");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new JCButton(new AbstractAction("JCButton") {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println(e);
}
}));
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
private static class JCButton extends AbstractButton {
public static final int SIZE = 32;
public JCButton(Action action) {
this.setModel(new DefaultButtonModel());
System.out.println(action.getValue(Action.NAME));
this.init((String) action.getValue(Action.NAME), null);
this.addActionListener(action);
}
@Override
public void updateUI() {
setUI((ButtonUI) UIManager.getUI(this));
}
@Override
public String getUIClassID() {
return "ButtonUI";
}
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new JCButtonTest().display();
}
});
}
}
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