Pixels between rects instead of drawn lines in HTML5 Canvas

Basically I want background to be seen between rects. Right now I'm trying to leave a distance which is dependable on rect size between them, can I make that size to be exact number of pixels?

Because right now these empty spaces merge, sometimes are not seen at all, etc.

function getMousePos(canvas, evt) {

  var rect = canvas.getBoundingClientRect();

  return {

    x: evt.clientX - rect.left,

    y: evt.clientY - rect.top

  };

}



var canvas = document.getElementById("posHourCanvas");

var context = canvas.getContext('2d');



var boxes = ;



function init() {

  context.clearRect(0, 0, canvas.width, canvas.height);

  boxes.length = 0;

  const strokeWidth = 0.2;

  canvas.width = $('#two')[0].clientWidth;

  var cellSize = canvas.width / 27;

  canvas.height = 7 / 27 * canvas.width;

  var x = y = 0;

  draw(x, y, canvas.width, canvas.height, cellSize, strokeWidth);

}



function Box(x, y, day, hour) {

  this.x = x;

  this.y = y;

  this.day = day;

  this.hour = hour;

}



function draw(x, y, w, h, cellSize, strokeWidth) {



  let onePixel = cellSize * strokeWidth;

  cellSize = cellSize * (1 - strokeWidth);

  context.beginPath();

  context.lineWidth = 0.01;

  context.strokeStyle = 'rgba(255, 255, 255, 0)';



  for (let i = 0; i < 7; i++) {

    context.beginPath();

    dayRect(context, cellSize, i, onePixel);

    let startX = 3 * cellSize + onePixel;

    for (let j = 0; j < 25; j++) {

      context.rect(startX, i * cellSize + i * onePixel, cellSize, cellSize);

      context.fillStyle = "white";

      context.fill();

      startX += cellSize + onePixel;

    }

  }

}



function dayRect(context, cellSize, day, onePixel) {

  var offSet = day * onePixel;

  context.rect(0, day * cellSize + offSet, 3 * cellSize, cellSize);

  context.fillStyle = "white";

  context.fill();

}



init();

window.addEventListener("resize", init, false);

body {

  margin: auto;

  color: white;

  background-color: black;

}



div#two {

  margin-left: 5%;

  width: 10%;

  height: 30%;

}

<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>



<div id="parent">

  <div>text above</div>



  <div id="two">

    <canvas id="posHourCanvas" width="600" height="300"></canvas>

  </div>



  <div>text under</div>

</div>

JSFIDDLE: http://jsfiddle.net/kgbh9352/

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

asked Jan 18 at 14:11

Ne Nenne

6119

add a comment |

Basically I want background to be seen between rects. Right now I'm trying to leave a distance which is dependable on rect size between them, can I make that size to be exact number of pixels?

Because right now these empty spaces merge, sometimes are not seen at all, etc.

function getMousePos(canvas, evt) {

  var rect = canvas.getBoundingClientRect();

  return {

    x: evt.clientX - rect.left,

    y: evt.clientY - rect.top

  };

}



var canvas = document.getElementById("posHourCanvas");

var context = canvas.getContext('2d');



var boxes = ;



function init() {

  context.clearRect(0, 0, canvas.width, canvas.height);

  boxes.length = 0;

  const strokeWidth = 0.2;

  canvas.width = $('#two')[0].clientWidth;

  var cellSize = canvas.width / 27;

  canvas.height = 7 / 27 * canvas.width;

  var x = y = 0;

  draw(x, y, canvas.width, canvas.height, cellSize, strokeWidth);

}



function Box(x, y, day, hour) {

  this.x = x;

  this.y = y;

  this.day = day;

  this.hour = hour;

}



function draw(x, y, w, h, cellSize, strokeWidth) {



  let onePixel = cellSize * strokeWidth;

  cellSize = cellSize * (1 - strokeWidth);

  context.beginPath();

  context.lineWidth = 0.01;

  context.strokeStyle = 'rgba(255, 255, 255, 0)';



  for (let i = 0; i < 7; i++) {

    context.beginPath();

    dayRect(context, cellSize, i, onePixel);

    let startX = 3 * cellSize + onePixel;

    for (let j = 0; j < 25; j++) {

      context.rect(startX, i * cellSize + i * onePixel, cellSize, cellSize);

      context.fillStyle = "white";

      context.fill();

      startX += cellSize + onePixel;

    }

  }

}



function dayRect(context, cellSize, day, onePixel) {

  var offSet = day * onePixel;

  context.rect(0, day * cellSize + offSet, 3 * cellSize, cellSize);

  context.fillStyle = "white";

  context.fill();

}



init();

window.addEventListener("resize", init, false);

body {

  margin: auto;

  color: white;

  background-color: black;

}



div#two {

  margin-left: 5%;

  width: 10%;

  height: 30%;

}

<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>



<div id="parent">

  <div>text above</div>



  <div id="two">

    <canvas id="posHourCanvas" width="600" height="300"></canvas>

  </div>



  <div>text under</div>

</div>

JSFIDDLE: http://jsfiddle.net/kgbh9352/

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

asked Jan 18 at 14:11

Ne Nenne

6119

add a comment |

Basically I want background to be seen between rects. Right now I'm trying to leave a distance which is dependable on rect size between them, can I make that size to be exact number of pixels?

Because right now these empty spaces merge, sometimes are not seen at all, etc.

function getMousePos(canvas, evt) {

  var rect = canvas.getBoundingClientRect();

  return {

    x: evt.clientX - rect.left,

    y: evt.clientY - rect.top

  };

}



var canvas = document.getElementById("posHourCanvas");

var context = canvas.getContext('2d');



var boxes = ;



function init() {

  context.clearRect(0, 0, canvas.width, canvas.height);

  boxes.length = 0;

  const strokeWidth = 0.2;

  canvas.width = $('#two')[0].clientWidth;

  var cellSize = canvas.width / 27;

  canvas.height = 7 / 27 * canvas.width;

  var x = y = 0;

  draw(x, y, canvas.width, canvas.height, cellSize, strokeWidth);

}



function Box(x, y, day, hour) {

  this.x = x;

  this.y = y;

  this.day = day;

  this.hour = hour;

}



function draw(x, y, w, h, cellSize, strokeWidth) {



  let onePixel = cellSize * strokeWidth;

  cellSize = cellSize * (1 - strokeWidth);

  context.beginPath();

  context.lineWidth = 0.01;

  context.strokeStyle = 'rgba(255, 255, 255, 0)';



  for (let i = 0; i < 7; i++) {

    context.beginPath();

    dayRect(context, cellSize, i, onePixel);

    let startX = 3 * cellSize + onePixel;

    for (let j = 0; j < 25; j++) {

      context.rect(startX, i * cellSize + i * onePixel, cellSize, cellSize);

      context.fillStyle = "white";

      context.fill();

      startX += cellSize + onePixel;

    }

  }

}



function dayRect(context, cellSize, day, onePixel) {

  var offSet = day * onePixel;

  context.rect(0, day * cellSize + offSet, 3 * cellSize, cellSize);

  context.fillStyle = "white";

  context.fill();

}



init();

window.addEventListener("resize", init, false);

body {

  margin: auto;

  color: white;

  background-color: black;

}



div#two {

  margin-left: 5%;

  width: 10%;

  height: 30%;

}

<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>



<div id="parent">

  <div>text above</div>



  <div id="two">

    <canvas id="posHourCanvas" width="600" height="300"></canvas>

  </div>



  <div>text under</div>

</div>

JSFIDDLE: http://jsfiddle.net/kgbh9352/

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

asked Jan 18 at 14:11

Ne Nenne

6119

Basically I want background to be seen between rects. Right now I'm trying to leave a distance which is dependable on rect size between them, can I make that size to be exact number of pixels?

Because right now these empty spaces merge, sometimes are not seen at all, etc.

function getMousePos(canvas, evt) {

  var rect = canvas.getBoundingClientRect();

  return {

    x: evt.clientX - rect.left,

    y: evt.clientY - rect.top

  };

}



var canvas = document.getElementById("posHourCanvas");

var context = canvas.getContext('2d');



var boxes = ;



function init() {

  context.clearRect(0, 0, canvas.width, canvas.height);

  boxes.length = 0;

  const strokeWidth = 0.2;

  canvas.width = $('#two')[0].clientWidth;

  var cellSize = canvas.width / 27;

  canvas.height = 7 / 27 * canvas.width;

  var x = y = 0;

  draw(x, y, canvas.width, canvas.height, cellSize, strokeWidth);

}



function Box(x, y, day, hour) {

  this.x = x;

  this.y = y;

  this.day = day;

  this.hour = hour;

}



function draw(x, y, w, h, cellSize, strokeWidth) {



  let onePixel = cellSize * strokeWidth;

  cellSize = cellSize * (1 - strokeWidth);

  context.beginPath();

  context.lineWidth = 0.01;

  context.strokeStyle = 'rgba(255, 255, 255, 0)';



  for (let i = 0; i < 7; i++) {

    context.beginPath();

    dayRect(context, cellSize, i, onePixel);

    let startX = 3 * cellSize + onePixel;

    for (let j = 0; j < 25; j++) {

      context.rect(startX, i * cellSize + i * onePixel, cellSize, cellSize);

      context.fillStyle = "white";

      context.fill();

      startX += cellSize + onePixel;

    }

  }

}



function dayRect(context, cellSize, day, onePixel) {

  var offSet = day * onePixel;

  context.rect(0, day * cellSize + offSet, 3 * cellSize, cellSize);

  context.fillStyle = "white";

  context.fill();

}



init();

window.addEventListener("resize", init, false);

body {

  margin: auto;

  color: white;

  background-color: black;

}



div#two {

  margin-left: 5%;

  width: 10%;

  height: 30%;

}

<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>



<div id="parent">

  <div>text above</div>



  <div id="two">

    <canvas id="posHourCanvas" width="600" height="300"></canvas>

  </div>



  <div>text under</div>

</div>

JSFIDDLE: http://jsfiddle.net/kgbh9352/

function getMousePos(canvas, evt) {

  var rect = canvas.getBoundingClientRect();

  return {

    x: evt.clientX - rect.left,

    y: evt.clientY - rect.top

  };

}



var canvas = document.getElementById("posHourCanvas");

var context = canvas.getContext('2d');



var boxes = ;



function init() {

  context.clearRect(0, 0, canvas.width, canvas.height);

  boxes.length = 0;

  const strokeWidth = 0.2;

  canvas.width = $('#two')[0].clientWidth;

  var cellSize = canvas.width / 27;

  canvas.height = 7 / 27 * canvas.width;

  var x = y = 0;

  draw(x, y, canvas.width, canvas.height, cellSize, strokeWidth);

}



function Box(x, y, day, hour) {

  this.x = x;

  this.y = y;

  this.day = day;

  this.hour = hour;

}



function draw(x, y, w, h, cellSize, strokeWidth) {



  let onePixel = cellSize * strokeWidth;

  cellSize = cellSize * (1 - strokeWidth);

  context.beginPath();

  context.lineWidth = 0.01;

  context.strokeStyle = 'rgba(255, 255, 255, 0)';



  for (let i = 0; i < 7; i++) {

    context.beginPath();

    dayRect(context, cellSize, i, onePixel);

    let startX = 3 * cellSize + onePixel;

    for (let j = 0; j < 25; j++) {

      context.rect(startX, i * cellSize + i * onePixel, cellSize, cellSize);

      context.fillStyle = "white";

      context.fill();

      startX += cellSize + onePixel;

    }

  }

}



function dayRect(context, cellSize, day, onePixel) {

  var offSet = day * onePixel;

  context.rect(0, day * cellSize + offSet, 3 * cellSize, cellSize);

  context.fillStyle = "white";

  context.fill();

}



init();

window.addEventListener("resize", init, false);

body {

  margin: auto;

  color: white;

  background-color: black;

}



div#two {

  margin-left: 5%;

  width: 10%;

  height: 30%;

}

<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>



<div id="parent">

  <div>text above</div>



  <div id="two">

    <canvas id="posHourCanvas" width="600" height="300"></canvas>

  </div>



  <div>text under</div>

</div>

function getMousePos(canvas, evt) {

  var rect = canvas.getBoundingClientRect();

  return {

    x: evt.clientX - rect.left,

    y: evt.clientY - rect.top

  };

}



var canvas = document.getElementById("posHourCanvas");

var context = canvas.getContext('2d');



var boxes = ;



function init() {

  context.clearRect(0, 0, canvas.width, canvas.height);

  boxes.length = 0;

  const strokeWidth = 0.2;

  canvas.width = $('#two')[0].clientWidth;

  var cellSize = canvas.width / 27;

  canvas.height = 7 / 27 * canvas.width;

  var x = y = 0;

  draw(x, y, canvas.width, canvas.height, cellSize, strokeWidth);

}



function Box(x, y, day, hour) {

  this.x = x;

  this.y = y;

  this.day = day;

  this.hour = hour;

}



function draw(x, y, w, h, cellSize, strokeWidth) {



  let onePixel = cellSize * strokeWidth;

  cellSize = cellSize * (1 - strokeWidth);

  context.beginPath();

  context.lineWidth = 0.01;

  context.strokeStyle = 'rgba(255, 255, 255, 0)';



  for (let i = 0; i < 7; i++) {

    context.beginPath();

    dayRect(context, cellSize, i, onePixel);

    let startX = 3 * cellSize + onePixel;

    for (let j = 0; j < 25; j++) {

      context.rect(startX, i * cellSize + i * onePixel, cellSize, cellSize);

      context.fillStyle = "white";

      context.fill();

      startX += cellSize + onePixel;

    }

  }

}



function dayRect(context, cellSize, day, onePixel) {

  var offSet = day * onePixel;

  context.rect(0, day * cellSize + offSet, 3 * cellSize, cellSize);

  context.fillStyle = "white";

  context.fill();

}



init();

window.addEventListener("resize", init, false);

body {

  margin: auto;

  color: white;

  background-color: black;

}



div#two {

  margin-left: 5%;

  width: 10%;

  height: 30%;

}

<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>



<div id="parent">

  <div>text above</div>



  <div id="two">

    <canvas id="posHourCanvas" width="600" height="300"></canvas>

  </div>



  <div>text under</div>

</div>

javascript html5-canvas

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

asked Jan 18 at 14:11

Ne Nenne

6119

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

asked Jan 18 at 14:11

Ne Nenne

6119

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

edited Jan 18 at 14:15

Islam Elshobokshy

2,3051428

asked Jan 18 at 14:11

Ne Nenne

6119

asked Jan 18 at 14:11

Ne Nenne

6119

asked Jan 18 at 14:11

Ne Nenne

6119

add a comment |

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