我有一些看起来像这样的滑块:
//Create the slider
JSlider speedSlider = new JSlider(JSlider.VERTICAL, MIN_SPEED, MAX_SPEED, initValue);
speedSlider.addChangeListener(controller);
speedSlider.setMajorTickSpacing(MAJOR_TICK_SPACING);
speedSlider.setPaintTicks(true);
panel.add(speedSlider);
在我的View.java类
中有Controller.java
public class Controller implements ControllerInterface {
//...
@Override
public void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting()) {
int speed = (int)source.getValue();
if (0 == speed) {
// stop
}
else {
model.setSpeedBody(speed);
}
}
}
}
问题在于我无法确定滑块事件究竟是什么,怎么做? (ControllerInterface扩展了ChangeListener)
答案 0 :(得分:2)
测试来源的价值:
JSlider source = (JSlider)e.getSource();
if (source == speedSlider) {
...
}
else if (source == gearSlider) {
...
}
或者为每个滑块添加一个特定的侦听器,以便每个侦听器只通知一个滑块的更改:
speedSlider.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
...
}
});