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fabricjs-demo
/
tutorial
/
Canvas
/
centeredScaling.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>centeredScaling</title>
  <style>
    #canvasBox {
      border: 1px solid #ccc;
    }
  </style>
</head>
<body>
  <canvas id="canvasBox" width="600" height="400"></canvas>

  <script src="../../script/fabric.js"></script>
<script>

  // 如果 centeredScaling 为 false（默认），需要按alt键才能以中心点作为缩放原点

  let canvas = new fabric.Canvas('canvasBox', {
    centeredScaling: true // 全局所有元素都生效
  })

  let rect = new fabric.Rect({
    width: 100,
    height: 60,
    left: 100,
    top: 100,
    fill: 'pink',
    // centeredScaling: true // 单个元素生效
  })

  let circle = new fabric.Circle({
    radius: 50,
    left: 300,
    top: 80,
    fill: 'green'
  })

  canvas.add(rect)

  canvas.add(circle)
</script>
</body>
</html>