import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDletStateChangeException;


public class test extends MIDlet implements CommandListener,ItemStateListener{
    private Form form;
    private TextBox tb;
    private Alert alert;
    private List list;
    Display display;
    Command ShowTextBox;
    Command ShowList;
    Command ShowAlert;
    Command SelectOnList;
    Command DeleteOneItemOfList;
    Command AddOneItemList;
    Command GoBack;
    String[] ListContext={"list1","list2","list3"};
    
    
	public test() {
		// TODO Auto-generated constructor stub
		form=new Form("FORM窗體展示：");
		form.append("本例子展示LIST，TEXTBOX，ALERT的用法，請單擊\"菜單\"查看");
		tb=new TextBox("TextBox","textbox的內(nèi)容",50,TextField.ANY);
		display=Display.getDisplay(this);
		ShowTextBox=new Command("顯示textbox",Command.OK,1);
		ShowList=new Command("顯示List",Command.OK,1);
		ShowAlert=new Command("顯示Alert",Command.OK,1);
		SelectOnList=new Command("選擇List",Command.OK,2);
		DeleteOneItemOfList=new Command("刪除List",Command.OK,2);
		AddOneItemList=new Command("添加一條List",Command.OK,2);
		GoBack=new Command("返回",Command.OK,1);
		alert=new Alert("ALERT實例","alert 內(nèi)容",null,AlertType.INFO);    
		list=new List("LIST實例",List.EXCLUSIVE,ListContext,null);
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}

	protected void startApp() throws MIDletStateChangeException {
		// TODO Auto-generated method stub
		display=Display.getDisplay(this);
        display.setCurrent(form);
        tb.addCommand(GoBack);
        tb.setCommandListener(this);
        form.addCommand(ShowAlert);
        form.addCommand(ShowList);
        form.addCommand(ShowTextBox);
        list.addCommand(SelectOnList);
        list.addCommand(DeleteOneItemOfList);
        list.addCommand(AddOneItemList);   
        list.addCommand(GoBack);
        form.setCommandListener(this);
        form.setItemStateListener(this);
        list.setCommandListener(this);
	}
    
	public void commandAction(Command c,Displayable d){
		if(c==ShowTextBox){
			display.setCurrent(tb);
			tb.setString("textbox setstring");
		}else if(c==ShowList){
			display.setCurrent(list);			
		}else if(c==ShowAlert){
			display.setCurrent(alert);
			alert.setTimeout(Alert.FOREVER);
			AlertType.INFO.playSound(display);
			display.flashBacklight(1500);	        		
		}else if(c==SelectOnList){
			 list.setTitle("您選擇的是："+list.getString(list.getSelectedIndex()));		   
		}else if(c==DeleteOneItemOfList){
			try{
				int Index=list.getSelectedIndex();
				list.delete(Index);
			}catch(IndexOutOfBoundsException e){
				System.out.println(e.toString());
			}
			
		}else if(c==AddOneItemList){
			list.append("新條目", null);
		}else if(c==GoBack){
			display.setCurrent(form);
		}
		
		
	}
	
	public void itemStateChanged(Item item){
		if(item.getLabel().equals("list1")){
			list.setSelectedIndex(1,true);
			if(list.isSelected(1)){
			list.setSelectedIndex(0, true);	
			list.setSelectedIndex(2, true); 
			}
		}
	}
}