package Gof.command;

public class RemoteController {

Command[] onCommands;

Command[] offCommands;

//执行撤销的命令

Command undoCommand;

//n:指定了一共有几个命令按钮

public RemoteController(int n)

{

onCommands=new Command[n];

offCommands=new Command[n];

for(int i=0;i<n;i++)

{

onCommands[i]=new NoCommand();

offCommands[i]=new NoCommand();

}

}

//给我们的命令按钮设置我们的命令

public void setCommand(int no,Command OnCommand, Command OffCommand){

onCommands[no]=OnCommand;

offCommands[no]=OffCommand;

}

public void onButtonWasPush(int no)

{

onCommands[no].execute();

//记录按下的按钮，用于撤销

undoCommand=onCommands[no];

}

public void offButtonWasPush(int no){

offCommands[no].execute();

undoCommand=offCommands[no];

}

//执行撤销命名

public void undoButtonWasPush()

{

undoCommand.undo();

}

}