有没有办法在 fabric js 上只显示旋转点？

Question

我只想显示 canvas 对象的旋转点并隐藏其控件。我尝试了以下方法：

obj.hasControls = false;
obj.hasRotatingPoint = true;

但它不起作用。

Answer 1

试试这个：

obj.setControlsVisibility({
    mt: false,
    mb: false,
    ml: false,
    mr: false,
    tr: false,
    tl: false,
    br: false,
    bl: false
});
obj.hasRotatingPoint = true;

查看jsFiddle

Answer 2

或者像这样：

var canvas = window._canvas = new fabric.Canvas('c');

var circle = new fabric.Circle({
  left: 50,
  top: 50,
  radius: 25,
  fill: 'rgba(0,255,0,0.5)',
});


circle.setControlsVisibility({
  mt: false,
  mb: false,
  ml: false,
  mr: false,
  tr: false,
  tl: false,
  br: false,
  bl: false,
  mtr: true //the rotating point (defaut: true)
});

canvas.add(circle);

canvas {
  border: 1px solid #999;
}

<script src="https://rawgit.com/kangax/fabric.js/master/dist/fabric.js"></script>
<canvas id="c" width="400" height="200"></canvas>

"mtr"为旋转点

有没有办法在 fabric js 上只显示旋转点？

Is there a way to show only the rotating point on fabric js?

fabricjs