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@naruse naruse/Calc.cs
Created Oct 22, 2013

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What would you like to do?
Basically draws a calculator and all the logic inside of it.
/*
Basically draws a calculator and all the logic inside.
programmed by: Juan Sebastian Munoz Arango
naruse@gmail.com
October
*/
using UnityEngine;
using System.Collections;
using System.Globalization;
public class Calc : MonoBehaviour {
private Rect calcSize = new Rect(360, 20, 220, 250);
private float[] registers = new float[2];//2 registers
private string currentNumber = "0";
private int calcScreenFontSize = 27;
private int operationFontSize = 15;
private string currentOperationToPerform = "";
private int maxDigits = 11;
private bool isFirst = true;
private bool shouldClearScreen = false;
private string GetCalcInternalsInfo() {
string info = "";
info += "Screen: " + currentNumber + "\n";
info += "Clear Screen?: " + shouldClearScreen + "\n";
for(int i = 0; i < registers.Length; i++ ) {
info += "Reg[" + i + "] <= " + registers[i] + "\n";
}
info += "Current op: " + currentOperationToPerform + "\n";
info += "Register to use: " + (isFirst?"0":"1");
return info;
}
void Update() {
GetInputFromCalc();
}
void OnGUI() {
//GUILayout.Label(GetCalcInternalsInfo());//uncomment this if you want to see some info internals.
calcSize = GUI.Window(0, calcSize, DoMyWindow, "Calculator");
}
void DoMyWindow(int windowID) {
GUI.Box(new Rect(20,20, calcSize.width-40, 43),"");
int tmpSize = GUI.skin.GetStyle("Label").fontSize;
GUI.skin.GetStyle("Label").fontSize = calcScreenFontSize;
GUI.Label(new Rect(23,18,calcSize.width-40, 37), currentNumber);
GUI.skin.GetStyle("Label").fontSize = tmpSize;
tmpSize = GUI.skin.GetStyle("Label").fontSize;
GUI.skin.GetStyle("Label").fontSize = operationFontSize;
GUI.Label(new Rect(130,42,calcSize.width-42, 37), currentOperationToPerform);
GUI.skin.GetStyle("Label").fontSize = tmpSize;
if(GUI.Button(new Rect(8, 70, 47, 30), "C")) {
ClearCalcData();
}
if(GUI.Button(new Rect(61, 70, 47, 30), "+/-")) {
if(currentNumber != "0") {
if(currentNumber[0] != '-')
currentNumber = currentNumber.Insert(0,"-");
else
currentNumber = currentNumber.Remove(0,1);
}
}
if(GUI.Button(new Rect(165, 141, 47, 30), "+"))
OperatorPressed("+");
if(GUI.Button(new Rect(165, 106, 47, 30), "-"))
OperatorPressed("-");
if(GUI.Button(new Rect(113, 70, 47, 30), "/"))
OperatorPressed("/");
if(GUI.Button(new Rect(165, 70, 47, 30), "x"))
OperatorPressed("x");
if(GUI.Button(new Rect(8, 176, 47, 30), "1"))
AppendNumber("1");
if(GUI.Button(new Rect(61, 176, 47, 30), "2"))
AppendNumber("2");
if(GUI.Button(new Rect(113, 176, 47, 30), "3"))
AppendNumber("3");
if(GUI.Button(new Rect(8, 141, 47, 30), "4"))
AppendNumber("4");
if(GUI.Button(new Rect(61, 141, 47, 30), "5"))
AppendNumber("5");
if(GUI.Button(new Rect(113, 141, 47, 30), "6"))
AppendNumber("6");
if(GUI.Button(new Rect(8, 106, 47, 30), "7"))
AppendNumber("7");
if(GUI.Button(new Rect(61, 106, 47, 30), "8"))
AppendNumber("8");
if(GUI.Button(new Rect(113, 106, 47, 30), "9"))
AppendNumber("9");
if(GUI.Button(new Rect(8, 212, 100, 30), "0"))
AppendNumber("0");
if(GUI.Button(new Rect(113, 212, 47, 30), ".")) {
if(!currentNumber.Contains(".") || shouldClearScreen)
AppendNumber(".");
}
if(GUI.Button(new Rect(165, 176, 47, 66), "=")) {
PerformOperation();
}
GUI.DragWindow();
}
private void OperatorPressed(string op) {
StoreCurrentNumberInReg(0);
isFirst = false;
shouldClearScreen = true;
currentOperationToPerform = op;
}
private void ClearCalcData() {
isFirst = true;
shouldClearScreen = true;
currentOperationToPerform = "";
currentNumber = "0";
for(int i = 0; i < registers.Length; i++)
registers[i] = 0;
}
private void PerformOperation() {
switch(currentOperationToPerform) {
case "+":
if(currentNumber != "NaN")
currentNumber = (registers[0] + registers[1]).ToString();
break;
case "-":
if(currentNumber != "NaN")
currentNumber = (registers[0] - registers[1]).ToString();
break;
case "x":
if(currentNumber != "NaN")
currentNumber = (registers[0] * registers[1]).ToString();
break;
case "/":
if(currentNumber != "NaN")
currentNumber = (registers[1] != 0) ? (registers[0] / registers[1]).ToString() : "NaN";
break;
case "":
break;
default:
Debug.LogError("Unknown operation: " + currentOperationToPerform);
break;
}
StoreCurrentNumberInReg(0);
isFirst = true;
shouldClearScreen = true;
}
private void StoreCurrentNumberInReg(int regNumber) {
registers[regNumber] = float.Parse(currentNumber, CultureInfo.InvariantCulture.NumberFormat);
}
private void AppendNumber(string s) {
if((currentNumber == "0") || shouldClearScreen)
currentNumber = (s == ".") ? "0." : s;
else
if(currentNumber.Length < maxDigits)
currentNumber += s;
if(shouldClearScreen)
shouldClearScreen = false;
StoreCurrentNumberInReg(isFirst ? 0 : 1);
}
private void GetInputFromCalc() {
if(Input.GetKeyDown(KeyCode.Keypad0) || Input.GetKeyDown(KeyCode.Alpha0))
AppendNumber("0");
if(Input.GetKeyDown(KeyCode.Keypad1) || Input.GetKeyDown(KeyCode.Alpha1))
AppendNumber("1");
if(Input.GetKeyDown(KeyCode.Keypad2) || Input.GetKeyDown(KeyCode.Alpha2))
AppendNumber("2");
if(Input.GetKeyDown(KeyCode.Keypad3) || Input.GetKeyDown(KeyCode.Alpha3))
AppendNumber("3");
if(Input.GetKeyDown(KeyCode.Keypad4) || Input.GetKeyDown(KeyCode.Alpha4))
AppendNumber("4");
if(Input.GetKeyDown(KeyCode.Keypad5) || Input.GetKeyDown(KeyCode.Alpha5))
AppendNumber("5");
if(Input.GetKeyDown(KeyCode.Keypad6) || Input.GetKeyDown(KeyCode.Alpha6))
AppendNumber("6");
if(Input.GetKeyDown(KeyCode.Keypad7) || Input.GetKeyDown(KeyCode.Alpha7))
AppendNumber("7");
if(Input.GetKeyDown(KeyCode.Keypad8) || Input.GetKeyDown(KeyCode.Alpha8))
AppendNumber("8");
if(Input.GetKeyDown(KeyCode.Keypad9) || Input.GetKeyDown(KeyCode.Alpha9))
AppendNumber("9");
if(Input.GetKeyDown(KeyCode.C))
ClearCalcData();
if(Input.GetKeyDown(KeyCode.KeypadPeriod) || Input.GetKeyDown(KeyCode.Period))
if(!currentNumber.Contains(".") || shouldClearScreen)
AppendNumber(".");
if(Input.GetKeyDown(KeyCode.KeypadDivide) || Input.GetKeyDown(KeyCode.Slash))
OperatorPressed("/");
if(Input.GetKeyDown(KeyCode.KeypadMultiply) || Input.GetKeyDown(KeyCode.Asterisk))
OperatorPressed("*");
if(Input.GetKeyDown(KeyCode.KeypadPlus) || Input.GetKeyDown(KeyCode.Plus))
OperatorPressed("+");
if(Input.GetKeyDown(KeyCode.KeypadMinus) || Input.GetKeyDown(KeyCode.Minus))
OperatorPressed("-");
if(Input.GetKeyDown(KeyCode.Return) || Input.GetKeyDown(KeyCode.KeypadEnter))
PerformOperation();
}
}
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