1,HTML source code£º
<![CDATA[
<html>
<head>
<title>How to use EventListener</title>
</head>
<body>
<script src="jsjava.js"></script>
<script>
function MyActionListener(){
this.actionPerformed=function(actionEvent){
var source=actionEvent.getSource();
debug(source.getActionCommand());
if(source==item1){
debug("item1 clicked");
}else if(source==item11){
debug("item11 clicked");
}else if(source==menu11){
debug("menu11 clicked");
}
};
}
MyActionListener.prototype=new ActionListener();
MyActionListener.prototype.constructor=MyActionListener;
var item1=new MenuItem("item1");
item1.setShortcut(new MenuShortcut("c"));
item1.addActionListener(new MyActionListener());
item1.setActionCommand("open");
var item2=new MenuItem("item2");
item2.setShortcut(new MenuShortcut("d"));
var menu1=new Menu("menu1");
menu1.add(item1);
menu1.add(item2);
var item11=new MenuItem("item11");
item11.setActionCommand("delete");
item11.addActionListener(new MyActionListener());
var item22=new MenuItem("item22");
item22.setShortcut(new MenuShortcut("e"));
var menu11=new Menu("menu11");
menu11.setShortcut("q");
menu11.addActionListener(new MyActionListener());
menu11.add(item11);
menu11.add(item22);
var menu2=new Menu("menu2");
menu2.add(menu11);
var mb=new MenuBar();
mb.add(menu1);
mb.add(menu2);
</script>
<script>
function clickItem1(){
var actionEvent=new ActionEvent(item1);
item1.processActionEvent(actionEvent);
}
function clickItem11(){
var actionEvent=new ActionEvent(item11);
item11.processActionEvent(actionEvent);
}
function clickMenu11(){
var actionEvent=new ActionEvent(menu11);
menu11.processActionEvent(actionEvent);
}
function showAllShortCuts(){
var str="";
var ss=mb.shortcuts();
while(ss.hasMoreElements()){
str+=ss.nextElement()+",";
}
debug(str);
}
function debug(str){
document.getElementById("debug").value+=str+"\n";
}
</script>
<textarea id="debug" rows="15" cols="55"></textarea><br>
<input type="button" value="click item1" onclick="clickItem1()">
<input type="button" value="click item11" onclick="clickItem11()">
<input type="button" value="click menu11" onclick="clickMenu11()">
<input type="button" value="show all shortcuts" onclick="showAllShortCuts()">
</body>
</html>
]]>
2,The display:
