MY CALCULATOR

app.js

/*ALl Logical and graphical codes for Calculator*/

var self = Ti.UI.createWindow({
	title : "GENERAL CALCULATOR",
	backgroundColor : '#000',
	layout : 'vertical',
	orientationModes : [Ti.UI.PORTRAIT]
});

// Create a TextField.
var main = Ti.UI.createTextArea({
	height : 60,
	width : 320,
	textAlign : Ti.UI.TEXT_ALIGNMENT_RIGHT,
	backgroundColor : 'gray',
	font : {
		fontSize : 30,
		fontWeight : 'bold'
	},
	value : "0",
	maxLength : 16,
	//name:"display",

	//softKeyboardOnFocus : Ti.UI.Android.SOFT_KEYBOARD_DEFAULT_ON_FOCUS, // Android only
	//keyboardType : Ti.UI.KEYBOARD_DEFAULT,
	//returnKeyType : Ti.UI.RETURNKEY_DEFAULT,
	borderStyle : Ti.UI.INPUT_BORDERSTYLE_ROUNDED,

});
self.add(main);
// Listen for return events.
main.addEventListener('click', function(e) {
	main.blur();
});
/// AGAIN FUNCTION
function addChar(input, character) {
	//alert(input); alert(character);
	if (main.value == null || main.value == "0")
		main.value = character;
	else
		main.value += character;
}

function deleteChar(input) {
	main.value = main.value.substring(0, main.value.length - 1);
}

function compute(form) {
	var str=main.value;
	if(ch=="^")
	alert("power");
	else
	main.value = eval(main.value);
	main.blur();
}

function expr(form) {
	main.value = Math.exp(main.value);
	main.blur();
}

function square(form) {
	main.value = eval(main.value) * eval(main.value);
	main.blur();
}

function sqrt(form) {
	main.value = Math.sqrt(main.value);
	main.blur();
}

function changeSign(input) {
	if (input.substring(0, 1) == "-")
		main.value = input.substring(1, main.value.length);
	else
		main.value = "-" + main.value;

	main.blur();
}

function percentval() {
	main.value = eval(main.value) / (100);
	main.blur();

}

function fact() {
	var n = eval(main.value);
	var k=1;
	for (var i = 1; i <= n; i++) {
		k=k*i;  
	}
	main.value=k;
	main.blur();
}

function coss(form) {
	main.value = Math.cos(main.value);
}

function sins(form) {
	main.value = Math.sin(main.value);
}

function tans(form) {
	main.value = Math.tan(main.value);
}

function lns(form) {
	main.value = Math.log(main.value);
}
function powerval() {
  
}

function checkNum(str) {
	for (var i = 0; i < str.length; i++) {
		var ch = str.substring(i, i + 1);
		if (ch < "0" || ch > "9") {
			if (ch != "/" && ch != "*" && ch != "+" && ch != "-" && ch != "." && ch != "(" && ch != ")" && ch != "^") {
				alert("invalid entry!");
				return false;
			}
		}
	}
	return true;
}

//--------VIEW sin cos-------------
var viewlogic = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 10,
	//left:10,
	layout : 'horizontal'
});
self.add(viewlogic);
// Create a Button.
var sin = Ti.UI.createButton({
	title : 'sin',
	height : 50,
	width : 64,
	value : 'sin'
});
sin.addEventListener('click', function(e) {
	if (checkNum(main.value)) {
		sins(main);
	}
});

// Add to the parent view.
viewlogic.add(sin);
// Create a Button.
var cos = Ti.UI.createButton({
	title : 'cos',
	height : 50,
	width : 64,
	value : 'cos'
});
cos.addEventListener('click', function(e) {
	if (checkNum(main.value)) {
		coss(main);
	}
});

// Add to the parent view.
viewlogic.add(cos);
// Create a Button.
var tan = Ti.UI.createButton({
	title : 'tan',
	height : 50,
	width : 64,
	value : 'tan'
});
tan.addEventListener('click', function(e) {
	if (checkNum(main.value)) {
		tans(main);
	}
});

// Add to the parent view.
viewlogic.add(tan);
// Create a Button.
var ln = Ti.UI.createButton({
	title : 'ln',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : 'ln'
});
ln.addEventListener('click', function(e) {
	if (checkNum(main.value)) {
		lns(main);
	}

});

// Add to the parent view.
viewlogic.add(ln);
// Create a Button.
var log = Ti.UI.createButton({
	title : 'log',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : 'log'
});
log.addEventListener('click', function(e) {

});

// Add to the parent view.
viewlogic.add(log);

//---------END VIEW sin cos----------
//--------VIEW NpR-------------
var viewnCr = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 5,
	//left:10,
	layout : 'horizontal'
});
self.add(viewnCr);
// Create a Button.
var yx = Ti.UI.createButton({
	title : ' y^x',
	height : 50,
	width : 64,
	value : 'y^x'
});
yx.addEventListener('click', function(e) {
	powerval();
	addChar(main.value, '^');
	main.blur();
});

// Add to the parent view.
viewnCr.add(yx);
// Create a Button.
var fac = Ti.UI.createButton({
	title : 'n!',
	height : 50,
	width : 64,
	value : 'n!'
});
fac.addEventListener('click', function(e) {
	fact();
});

// Add to the parent view.
viewnCr.add(fac);
// Create a Button.
var nc = Ti.UI.createButton({
	title : 'nCr',
	height : 50,
	width : 64,
	value : 'nCr'
});
nc.addEventListener('click', function(e) {
});

// Add to the parent view.
viewnCr.add(nc);
// Create a Button.
var np = Ti.UI.createButton({
	title : 'nPr',
	height : 50,
	width : 64,
	value : 'nPr'
});
np.addEventListener('click', function(e) {
});

// Add to the parent view.
viewnCr.add(np);
// Create a Button.
var pai = Ti.UI.createButton({
	title : 'π',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : 'π'
});
pai.addEventListener('click', function(e) {
	//percentval();

});

// Add to the parent view.
viewnCr.add(pai);
// Create a Button.

//---------END VIEW NpR----------

//--------VIEW Zero-------------
var view0 = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 5,
	//left:10,
	layout : 'horizontal'
});
self.add(view0);
// Create a Button.
var sqr = Ti.UI.createButton({
	title : '√',
	height : 50,
	width : 64,
	value : '√'
});
sqr.addEventListener('click', function(e) {
	//sqrrootval();
	if (checkNum(main.value)) {
		sqrt(main);
	}
});

// Add to the parent view.
view0.add(sqr);
// Create a Button.
var x2 = Ti.UI.createButton({
	title : 'x^2',
	height : 50,
	width : 64,
	value : 'x^2'
});
x2.addEventListener('click', function(e) {
	if (checkNum(main.value)) {
		square(main);
	}
});

// Add to the parent view.
view0.add(x2);
// Create a Button.
var pr = Ti.UI.createButton({
	title : '%',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : '%'
});
pr.addEventListener('click', function(e) {
	percentval();

});

// Add to the parent view.
view0.add(pr);
var fb = Ti.UI.createButton({
	title : '(',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : '('
});
fb.addEventListener('click', function(e) {
	addChar(main.value, '(');
	main.blur();
});

// Add to the parent view.
view0.add(fb);
// Create a Button.
var bra = Ti.UI.createButton({
	title : ')',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : 'bra'
});
bra.addEventListener('click', function(e) {
	//alert(ac.value);
	//reset();
	addChar(main.value, ')');
	main.blur();
});

// Add to the parent view.
view0.add(bra);

//---------END VIEW0-----------

//--------VIEW ONE-------------
var view1 = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 5,
	//left:10,
	layout : 'horizontal'
});
self.add(view1);
// Create a Button.
var num7 = Ti.UI.createButton({
	title : '7',
	height : 50,
	width : 64,
	value : '7'
});
num7.addEventListener('click', function(e) {
	addChar(main.value, '7');
});

// Add to the parent view.
view1.add(num7);
// Create a Button.
var num8 = Ti.UI.createButton({
	title : '8',
	height : 50,
	width : 64,
	value : '8'
});
num8.addEventListener('click', function(e) {
	addChar(main.value, '8');
	main.blur();
});

// Add to the parent view.
view1.add(num8);
// Create a Button.
var num9 = Ti.UI.createButton({
	title : '9',
	height : 50,
	width : 64,
	value : '9'
});
num9.addEventListener('click', function(e) {
	addChar(main.value, '9');
	main.blur();
});

// Add to the parent view.
view1.add(num9);
// Create a Button.
var del = Ti.UI.createButton({
	title : 'DEL',
	height : 50,
	width : 64,
	//backgroundColor:'red',
	value : 'del'
});
del.addEventListener('click', function(e) {
	deleteChar(main.value);
	main.blur();
});

// Add to the parent view.
view1.add(del);
// Create a Button.
var ac = Ti.UI.createButton({
	title : 'AC',
	height : 42,
	width : 58,
	backgroundColor : 'red',
	value : 'ac'
});
ac.addEventListener('click', function(e) {
	main.value = 0;
	main.blur();
});

// Add to the parent view.
view1.add(ac);
num7.addEventListener('click', function(e) {
	main.blur();
});

//---------END VIEW1-----------

//--------VIEW2 START-------------
var view2 = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 5,
	//left:10,
	layout : 'horizontal'
});
self.add(view2);
// Create a Button.
var num4 = Ti.UI.createButton({
	title : '4',
	height : 50,
	width : 64,
	value : '4'
});
num4.addEventListener('click', function(e) {
	addChar(main.value, '4');
	main.blur();
});

// Add to the parent view.
view2.add(num4);
// Create a Button.
var num5 = Ti.UI.createButton({
	title : '5',
	height : 50,
	width : 64,
	value : '5'
});
num5.addEventListener('click', function(e) {
	addChar(main.value, '5');
	main.blur();
});

// Add to the parent view.
view2.add(num5);
// Create a Button.
var num6 = Ti.UI.createButton({
	title : '6',
	height : 50,
	width : 64,
	value : '6'
});
num6.addEventListener('click', function(e) {
	addChar(main.value, '6');
	main.blur();
});

// Add to the parent view.
view2.add(num6);
// Create a Button.
var mul = Ti.UI.createButton({
	title : '*',
	height : 50,
	width : 64,
	value : '*'
});
mul.addEventListener('click', function(e) {
	addChar(main.value, '*');
	main.blur();

});

// Add to the parent view.
view2.add(mul);
// Create a Button.
var div = Ti.UI.createButton({
	title : '/',
	height : 50,
	width : 64,
	value : '/'
});
div.addEventListener('click', function(e) {
	addChar(main.value, '/');
	main.blur();
});

// Add to the parent view.
view2.add(div);
//---------END VIEW2-----------

//--------VIEW3 START-------------
var view3 = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 5,
	//left:10,
	layout : 'horizontal'
});
self.add(view3);
// Create a Button.
var num1 = Ti.UI.createButton({
	title : '1',
	height : 50,
	width : 64,
	value : '1'
});
num1.addEventListener('click', function(e) {
	addChar(main.value, '1');
	main.blur();
});

// Add to the parent view.
view3.add(num1);
// Create a Button.
var num2 = Ti.UI.createButton({
	title : '2',
	height : 50,
	width : 64,
	value : '2'
});
num2.addEventListener('click', function(e) {
	addChar(main.value, '2');
	main.blur();
});

// Add to the parent view.
view3.add(num2);
// Create a Button.
var num3 = Ti.UI.createButton({
	title : '3',
	height : 50,
	width : 64,
	value : '3'
});
num3.addEventListener('click', function(e) {
	addChar(main.value, '3');
	main.blur();
});

// Add to the parent view.
view3.add(num3);
// Create a Button.
var add = Ti.UI.createButton({
	title : '+',
	height : 50,
	width : 64,
	value : '+'
});
add.addEventListener('click', function(e) {
	addChar(main.value, '+');
	main.blur();

});

// Add to the parent view.
view3.add(add);
// Create a Button.
var min = Ti.UI.createButton({
	title : '-',
	height : 50,
	width : 64,
	value : '-'
});
min.addEventListener('click', function(e) {
	//alert(min.value);
	//operator("-");
	addChar(main.value, '-');
	main.blur();

});

// Add to the parent view.
view3.add(min);
//---------END VIEW3-----------

//--------VIEW4 START-------------
var view4 = Titanium.UI.createView({
	//borderRadius : 10,
	backgroundColor : 'black',
	height : 50,
	top : 5,
	//left:10,
	layout : 'horizontal'
});
self.add(view4);
// Create a Button.
var num0 = Ti.UI.createButton({
	title : '0',
	height : 50,
	width : 64,
	value : '0'
});
num0.addEventListener('click', function(e) {
	addChar(main.value, '0');
	main.blur();
});
// Add to the parent view.
view4.add(num0);
// Create a Button.
var pm = Ti.UI.createButton({
	title : '+/-',
	height : 50,
	width : 64,
	value : '+/-'
});
// Add to the parent view.changeSign(this.form.display)
pm.addEventListener('click', function(e) {
	changeSign(main.value);
	main.blur();
});
view4.add(pm);
// Create a Button.
var dot = Ti.UI.createButton({
	title : '.',
	height : 50,
	width : 64,
	value : '.'

});
dot.addEventListener('click', function(e) {
	//displaynum(".");
	addChar(main.value, '.');
	main.blur();
});
// Add to the parent view.
view4.add(dot);
// Create a Button.
var exp = Ti.UI.createButton({
	title : 'EXP',
	height : 50,
	width : 64,
	value : 'exp'
});
// Add to the parent view.
exp.addEventListener('click', function(e) {
	//equals();
	if (checkNum(main.value)) {
		expr(main);
	}
});
view4.add(exp);
var eq = Ti.UI.createButton({
	title : '=',
	height : 50,
	width : 64,
	value : '='
});
eq.addEventListener('click', function(e) {
	//equals();
	if (checkNum(main.value)) {
		compute(main);
	}
	main.blur();
});
// Add to the parent view.
view4.add(eq);
//---------END VIEW4-----------

self.open();