actionPerformed
If it exists, the actionPerfomed() method is called every time a GUI component generates an event. It is passed a GUIEvent
as an argument. Events are generated on button click, checkbox state change, radio button state change, and text field focus
change.
The event notification is sent to the listener declared in the particular component’s addActionListener() method.
Syntax
void actionPerformed (GUIEvent e) {
// Statements here will be executed whenever a GUIEvent is generated
}
Example
import interfascia.*;
IFButton b1 = new IFButton ("One", 30, 20, 40, 17);
IFButton b2 = new IFButton ("Two", 30, 60, 40, 17);
void setup() {
GUIController c = new GUIController (this);
b1.addActionListener(this);
b2.addActionListener(this);
c.add (b1);
c.add (b2);
}
void draw() {
background(200);
}
void actionPerformed (GUIEvent e) {
if (e.getSource() == b1) {
println("Button one was clicked");
} else if (e.getSource() == b2) {
println("Button two was clicked");
}
}