Because ClockListener is a nested class (lower), the enclosing instance (upper) can access the listener’s private fields. If you have a reference to an instance of ClockListener, ClockListener cl = new ClockListener(); you can use it to initialize your timer Timer t = new Timer(1000, cl); and you can use it in your test: if … Read more
I’d use a JToggelButton, as shown here, or delegate to the contained buttons, as @duffymo suggests. If you really need a custom OnOffSwitchEvent, the standard wiring is outlined in EventListenerList, an instance of which is contained in every JComponent. Addendum: Here’s an example of delegating to a ButtonGroup containing two buttons. The label is decorated … Read more
As a general rule, you should not have your GUI classes, such as the class extending JPanel, implement any listener interfaces, and in fact you should strive for just the opposite — to separate the control functions of the program (the listeners and the like) from the view functions of the program (the GUI). So … Read more
another way as implementing inner ActionListener (with setActionCommand(String actionCommand)) for whole JMenu is wrote java.swing.Action for each of JMenuItem or implements EventHandler (seems like as valid for all Listeners that I tried) example about JButtons and with implemented ActionListener and EventHandler (both Listeners firing events) EDIT: EventHandler os too hacky, because in Swing aren’t another … Read more
From a JavaRanch Forum post. Key press and release handlers are added on the scene and update movement state variables recorded in the application. An animation timer hooks into the JavaFX pulse mechanism (which by default will be capped to fire an event 60 times a second) – so that is a kind of game … Read more
Two ways: 1. Implement ActionListener in your class, then use jBtnSelection.addActionListener(this); Later, you’ll have to define a menthod, public void actionPerformed(ActionEvent e). However, doing this for multiple buttons can be confusing, because the actionPerformed method will have to check the source of each event (e.getSource()) to see which button it came from. 2. Use anonymous … Read more
Yes, simply create a DefaultComboBoxModel for each set, and do setModel() on JComboBox2 when JComboBox1 changes. Addendum: For example, import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ComboBoxModel; import javax.swing.DefaultComboBoxModel; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; public class ComboTest extends JPanel implements ActionListener, Runnable { private final JComboBox combo1 = new JComboBox( new String[]{“Course 1”, “Course … Read more
If you want to create a CustomButtonUI then you have to look deepest to the BasicXxxUI. overide List of Colors from JButton Note there isn’t paintComponent(). It’s wrong, just use the paint() method, Below is just a simple example if that is possible (for Metal JButton). Note just for Metal LaF, I’m so lazy and … Read more
actionListener Use actionListener if you want have a hook before the real business action get executed, e.g. to log it, and/or to set an additional property (by <f:setPropertyActionListener>), and/or to have access to the component which invoked the action (which is available by ActionEvent argument). So, purely for preparing purposes before the real business action … Read more
Sort of. Java has events instead of interrupts. The main reason for the distinguishing between mouse and action events is that there are other ways to click a button other than actually clicking on it. You could direct focus to the button and then press the space bar, at least on Mac.