cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <div class="wrapper">
  <header>
  <h1>Jackie's <span class="can-speak">*</span> Calculator</h1>
  <p><span class="can-speak">*</span> A calculator that speaks in Chrome and Safari</p>
</header>
<main>
  <canvas width="300" height="500" id="calculator"></canvas>

</main>
<footer>
  &copy; 2015 Se&aacute;n Behan
</footer>
</div>
            
          
!
            
              body {
  background: #fafafa;
  color: #000000;
  font-size: 16px;
}

.can-speak {
  color: #E1163C;
}

h1 {
  font-family: "Share Tech Mono", sans-serif;
  font-size: 2em;
  margin: 10px;
}

.pointer {
  cursor: pointer;
}

.wrapper {
  min-width: 300px;
  text-align: center;
}
            
          
!
            
              var calcCanvas = document.getElementById("calculator"),
    canvasLeft = calcCanvas.offsetLeft,
    canvasTop = calcCanvas.offsetTop,
    ctx = calcCanvas.getContext('2d'),
    buttons = [
      {x: 60, y: 220, char: '7', op: false},
      {x: 120, y: 220, char: '8', op: false},
      {x: 180, y: 220, char: '9', op: false},
      {x: 240, y: 220, char: '\u00F7', op: true}, // division
      {x: 60, y: 280, char: '4', op: false},
      {x: 120, y: 280, char: '5', op: false},
      {x: 180, y: 280, char: '6', op: false},
      {x: 240, y: 280, char: '\u00D7', op: true}, // multiplication
      {x: 60, y: 340, char: '1', op: false},
      {x: 120, y: 340, char: '2', op: false},
      {x: 180, y: 340, char: '3', op: false},
      {x: 240, y: 340, char: '\u2212', op: true}, // minus
      {x: 60, y: 400, char: '0', op: false},
      {x: 120, y: 400, char: '\u002E', op: false}, // decimal point
      {x: 180, y: 400, char: '\u003D', op: true}, // equals
      {x: 240, y: 400, char: '\u002B', op: true} // addition
    ],
    runningTotal = 0,
    displayArr = [],
    operators = {
      '\u002B': function(a, b) {return a + b;},
      '\u2212': function(a, b) {return a - b;},
      '\u00D7': function(a, b) {return a * b;},
      '\u00F7': function(a, b) {return a / b;},
      '\u003D': function(a, b) {return b;}
    },
    lastOperator = '\u003D',
    afterEquals = false; // switch to keep track of operators after an equals



// START - Drawing Functions
// canvas styles
ctx.lineWidth = 2;
var buttonRadius = 25;

//attempt at a gradent to resemble shiny plastic of kids toy
var plasticGradient = ctx.createRadialGradient(0, 0, 350, 50, 50, 600);
plasticGradient.addColorStop(0, '#ffeeee');
plasticGradient.addColorStop(0.9, '#ddefbb');
plasticGradient.addColorStop(1, '#ddd');

// draw a rounded rectangle
function roundedRect(xCor, yCor, cornerRadius, length, height) {
  // take into account radius of corner in sides
  var rectLength = length - cornerRadius * 2;
  var rectHeight = height - cornerRadius * 2;
  ctx.save();
  ctx.beginPath();
  //go around counter clockwise from top left
  ctx.translate(xCor, yCor + cornerRadius);
  ctx.moveTo(0, 0);
  ctx.lineTo(0, rectHeight);
  ctx.translate(0, rectHeight);
  ctx.quadraticCurveTo(0, cornerRadius, cornerRadius, cornerRadius);
  ctx.translate(cornerRadius, cornerRadius);
  ctx.lineTo(rectLength, 0);
  ctx.translate(rectLength, 0);
  ctx.quadraticCurveTo(cornerRadius, 0, cornerRadius, -cornerRadius);
  ctx.translate(cornerRadius, -cornerRadius);
  ctx.lineTo(0, -rectHeight);
  ctx.translate(0, -rectHeight);
  ctx.quadraticCurveTo(0, -cornerRadius, -cornerRadius, -cornerRadius);
  ctx.translate(-cornerRadius, -cornerRadius);
  ctx.lineTo(-rectLength, 0);
  ctx.translate(-rectLength, 0);
  ctx.quadraticCurveTo(-cornerRadius, 0, -cornerRadius, cornerRadius);
  ctx.stroke();
  ctx.restore();
}

// draw the calculator buttons
function drawButtons() {
  ctx.font = '24px sans-serif';
  ctx.textAlign = 'center';
  ctx.textBaseline = 'middle';
  buttons.forEach(function(button) {
    ctx.beginPath();
    if (button.op) {
      ctx.fillStyle = '#77D13F';
    } else {
      ctx.fillStyle = '#E1163C';
    }

    ctx.arc(button.x, button.y, buttonRadius, 0, 2*Math.PI);
    ctx.stroke();
    ctx.fill();

    ctx.fillStyle = 'white';
    ctx.fillText(button.char, button.x, button.y);
  });

}

function drawScreen() {
  ctx.textAlign = 'center';
  ctx.textBaseline = 'middle';
  ctx.fillStyle = 'black';
  ctx.font = '48px Share Tech Mono';
  var numberX = 250, numberY = 140;
  for (var i = displayArr.length - 1; i >= 0; i--) {
    ctx.fillText(displayArr[i], numberX, numberY);
    numberX -= 20;
  }
}

// Draw the calculator
// Called at the start and each time display is changed
function drawCalc() {
  // calculator body
  ctx.beginPath();
  ctx.fillStyle = plasticGradient;
  ctx.moveTo(0, 100);
  ctx.lineTo(10, 450);
  ctx.quadraticCurveTo(150, 500, 290, 450);
  ctx.lineTo(300, 100);
  ctx.quadraticCurveTo(150, 10, 0, 100);
  ctx.fill();
  ctx.stroke();

  // calculator screen frame
  ctx.fillStyle = "#ffe330";
  roundedRect(25, 100, 10, 250, 75);
  ctx.fill();
  ctx.fillStyle = "#4FCCF9";
  roundedRect(35, 110, 5, 230, 55);
  ctx.fill();

  // buttons
  drawButtons();

  // clear button
  ctx.fillStyle = "#ffe330";
  roundedRect(100, 435, 5, 100, 35);
  ctx.fill();
  ctx.fillStyle = 'white';
  ctx.fillText('CLEAR', 150, 455);

  // display digits
  drawScreen();
}
// END Drawing functions


// START - Logic
// which button was pressed
function whichButton(x, y, cx, cy) {
  var dx = x - cx;
  var dy = y - cy;
  return dx * dx + dy * dy <= buttonRadius * buttonRadius;
}

function speak(utter) {
  var sayWhat = utter === '\u002E' ?
    new SpeechSynthesisUtterance('point') : // jshint ignore:line
    new SpeechSynthesisUtterance(utter); // jshint ignore:line

  sayWhat.lang = "en-GB";
  window.speechSynthesis.speak(sayWhat);
}

// calculator logic
function calculate(operator) {
  var displayNum = parseFloat(displayArr.join(''));
  runningTotal = operators[lastOperator](runningTotal, displayNum);
  runningTotal = runningTotal.toPrecision(10).replace(/\.?0+$/,"");
  if (runningTotal > 9999999999) {
    runningTotal = "BIG NUMBER!";
  }
  if (operator === '=') {
    displayArr = runningTotal.toString().split('');
    drawCalc();
  } else {
    displayArr = [];
  }
  lastOperator = operator;
}
//END - Logic



// START - events
// Throttling - http://www.sberry.me/articles/javascript-event-throttling-amp-debouncing
var limiter = true, checkOverButton = false;
calcCanvas.addEventListener('mousemove', function(event) {
  if (limiter) {
    limiter = false;
    var posX = event.pageX - canvasLeft;
    var posY = event.pageY - canvasTop;
    
    buttons.forEach(function(button) {
      if (whichButton(posX, posY, button.x, button.y)) {
        checkOverButton = true;
      }
    });
    if (!checkOverButton) {
      calcCanvas.className = '';
    } else {
      calcCanvas.className = 'pointer';
      checkOverButton = false;
    }
    setTimeout(function() {limiter = true;}, 50);
  }
});

calcCanvas.addEventListener('click', function(event) {
  var clickX = event.pageX - canvasLeft,
      clickY = event.pageY - canvasTop;

  buttons.forEach(function(button) {
    if (whichButton(clickX, clickY, button.x, button.y)) { //was a button clicked?
      if (!button.op) { // if a number is clicked
        if (displayArr.length >= 11) {
          if ('speechSynthesis' in window) {
            speak("Sorry, too many numbers");
          }
        } else {
          if (afterEquals === true) {
            displayArr = [];
            drawCalc();
            afterEquals = false;
          }
          displayArr.push(button.char);
          if ('speechSynthesis' in window) {
            speak(button.char);
          }
          drawCalc();
        }
      } else {
        afterEquals = false;
        calculate(button.char);
        if ('speechSynthesis' in window) {
          speak(button.char);
        }
        if (button.char === '=') {
          if ('speechSynthesis' in window) {
            speak(runningTotal);
          }
          afterEquals = true;
        }
      }
    }
  });
  // clear button
  if ((clickX > 100 && clickX < 200) &&
  (clickY > 435 && clickY < 470)) {
    displayArr = [];
    runningTotal = 0;
    lastOperator = '\u003D';
    afterEquals = false;
    drawCalc();
  }
});

// if speech synthesis api is available change title of page
if ('speechSynthesis' in window){
  document.getElementsByClassName('can-speak')[0].textContent = 'Speaking';
}



// INIT
if (ctx) {
  drawCalc();
}

            
          
!
999px
Loading ..................

Console