Disable buttons

[littlea5h]

For my calculator i am still able to choose an operator before i click on a number. I would like to disable that. This is how i have implemented it but it doesn’t seem to work:

var currentNumber:String="";
function pressNumber(e:MouseEvent):void {
    display_txt.appendText(e.currentTarget.num);
    if (operatorSelected) {
        opBtn.mouseEnabled = true;//DISABLE HERE
        num2S+=e.currentTarget.num;
        num2=Number(num2S);
    } else {
        num1S+=e.currentTarget.num;
        num1=Number(num1S);
    }
}

This is the rest of my code as follows:

import flash.events.MouseEvent; 
var btn:Array = new Array();
for (var i = 0; i < 10; i++) {
    var myBtn:Btn = new Btn();
	myBtn.y = 15;
	myBtn.x = i * 100 + 15;
	myBtn.width = 48;
	myBtn.height = 48;
    myBtn.buttonMode=true;
    myBtn.mouseChildren=false;
    myBtn.num=Number(i);
    myBtn.caption.text=String(i);
    addChild(myBtn);
    btn.push(myBtn);
    myBtn.addEventListener(MouseEvent.CLICK,pressNumber);
}
//EVENT TO ADD NUMBERS TO DISPLAY                                       ;
 
btn[0].y += 370;
btn[0].x += 10;


btn[1].y += 310;
btn[1].x += -90;


btn[2].y += 310;
btn[2].x += -130;


btn[3].y += 310;
btn[3].x += -170;


btn[4].y += 250;
btn[4].x += -390;


btn[5].y += 250;
btn[5].x += -430;


btn[6].y += 250;
btn[6].x += -470;


btn[7].y += 190;
btn[7].x += -690;


btn[8].y += 190;
btn[8].x += -730;


btn[9].y += 190;
btn[9].x += -770;


//OPERATORS//
//OPERATORS//
var operatorSelected:Boolean;
var operate:Array=new Array("÷","x","-","+");
var operators:Array = new Array();
for (var io:int = 0; io < 4; io++) {
    var opBtn:Btn_operator = new Btn_operator();
	opBtn.width = 48;
	opBtn.height = 48;
    opBtn.buttonMode=true;
    opBtn.mouseChildren=false;
    opBtn.op=Number(operators);
    addChild(opBtn);
    operators.push(opBtn);
    opBtn.addEventListener(MouseEvent.CLICK, pressOperator);
}
//EVENT TO ADD OPERATORS TO DISPLAY;


operators[0].y += 383;
operators[0].x += 198;
operators[0].caption_op.text = String("/");


operators[1].y += 323;
operators[1].x += 198;
operators[1].caption_op.text = String("*");


operators[2].y += 263;
operators[2].x += 198;
operators[2].caption_op.text = String("-");


operators[3].y += 203;
operators[3].x += 198;
operators[3].caption_op.text = String("+");


/*operators[4].y += 263;
operators[4].x += 256;
operators[4].caption_op.text = String("-/+");*/






//ADD DOT
var dot:Btn_dot = new Btn_dot();
	dot.width = 48;
	dot.height = 48;
	dot.buttonMode = true;
	dot.mouseChildren = false;
	dot.caption_op.text = String (".");
	addChild(dot);


dot.y += 383;
dot.x += 78;
dot.addEventListener(MouseEvent.CLICK, addDot);//EVENT TO ADD DOT TO DISPLAY


//BACKSPACE
var goBack:Btn_backspace = new Btn_backspace();
	goBack.width = 48;
	goBack.height = 48;
	goBack.buttonMode = true;
	goBack.mouseChildren = false;
	goBack.caption_op.text = String ("<--");
	addChild(goBack);


goBack.y += 203;
goBack.x += 256;
goBack.addEventListener(MouseEvent.CLICK, backSpace);//EVENT TO GO BACK SPACE IN DISPLAY


//clearAll
var clearAll:Btn_clear = new Btn_clear();
	clearAll.width = 48;
	clearAll.height = 48;
	clearAll.buttonMode = true;
	clearAll.mouseChildren = false;
	clearAll.caption_op.text = String ("C");
	addChild(clearAll);


clearAll.y += 323;
clearAll.x += 256;
clearAll.addEventListener(MouseEvent.CLICK, clearFields);//EVENT TO GO BACK SPACE IN DISPLAY






//EQUALS
var equals:Btn_equals = new Btn_equals();
equals.width = 48;
equals.height = 48;
equals.buttonMode=true;
equals.mouseChildren=false;
equals.caption_op.text=String("=");
addChild(equals);
	
equals.y += 383;
equals.x += 138;
equals.addEventListener(MouseEvent.CLICK, performEquals);
//EVENT TO CALCULATE




//VARIABLE HANDLE OPERATION NOT BUTTON
var operates:String;


//HANDLE FIRST AND SECOND VALUE
var num1:Number;
var num2:Number;


var num1S:String="";
var num2S:String="";


var currentNumber:String="";
function pressNumber(e:MouseEvent):void {
    display_txt.appendText(e.currentTarget.num);
    if (operatorSelected) {
		opBtn.mouseEnabled = true;
        num2S+=e.currentTarget.num;
        num2=Number(num2S);
    } else {
        num1S+=e.currentTarget.num;
        num1=Number(num1S);
    }
}




//DISPLAY OPERATORS
function pressOperator(event:MouseEvent):void {
    operatorSelected = true;
    operates=operate[operators.indexOf(event.target)];
    display_txt.appendText(operate[operators.indexOf(event.target)]);
    trace(operate[operators.indexOf(event.target)]);
}


//CLEARS DISPLAY AREA
function clearFields(event:MouseEvent):void{
	display_txt.text = "";
	answer_txt.text = "";
	num1=NaN;
	num2=NaN;
	}


//ADDS DECIMAL PLACE
function addDot(event:MouseEvent):void{
	if(event.currentTarget.num == Number(display_txt.text))
	{
	display_txt.text = "0";
	}
	if (display_txt.text.indexOf(".")==-1){
		display_txt.appendText(".");


	}
	
	}
//BACKSPACE DISPLAY AREA
function backSpace(e:MouseEvent):void{
	var temp_str:String = display_txt.text;
	display_txt.text = temp_str.substr(0, (temp_str.length-1)); // Get rid of last character in the string, which in this case is the phantom \r or 
 character
}


var devideZero:Boolean;
function performCalculation():void {
    operatorSelected = false;
    switch (operates) {
        case "÷" :
            if(num2 != 0) {
    		num1 /= num2;
			}else{
     		answer_txt.text = "Cannot devide by zero";
     devideZero = true;
	 }
            break;
        case "x" :
            num1*=num2;
            break;
        case "-" :
            num1-=num2;
            break;
        case "+" :
            num1+=num2;
            break;
        default :
            break;
    }
}
 
function performEquals(e:MouseEvent):void {
	num1S="";
    num2S="";
	 performCalculation();
	 answer_txt.text=num1.toPrecision(2);
	trace(num1.toPrecision(2));//traces
	if(!devideZero){
    answer_txt.text=String(num1);
	}
	num2 = NaN;
}