javascript - fabric.js のサイズ変更および回転コントロールをカスタム イメージに置き換えますか?

Question

私は、fabric.jsのサイズ変更と長方形の回転をカスタム画像に置き換える方法の例を探しています....誰かがこれをしましたか?

ありがとう。

Answer 1

次のようにプロトタイプをオーバーライドすることでそれを行うことができます。

var topLeftImage = new Image();
topLeftImage.src = 'images/tl.png';

var topRightImage = new Image();
topRightImage.src = 'images/tr.png';

var bottomRightImage = new Image();
bottomRightImage.src = 'images/br.png';

//Warning I modified some other things here as well, please copy this from the sources and modify it then
fabric.Object.prototype.drawCorners = function(ctx) {
  if (!this.hasControls) return;

  var size = this.cornersize,
      size2 = size / 2,
      strokeWidth2 = this.strokeWidth / 2,
      left = -(this.width / 2),
      top = -(this.height / 2),
      _left,
      _top,
      sizeX = size / this.scaleX,
      sizeY = size / this.scaleY,
      paddingX = this.padding / this.scaleX,
      paddingY = this.padding / this.scaleY,
      scaleOffsetY = size2 / this.scaleY,
      scaleOffsetX = size2 / this.scaleX,
      scaleOffsetSizeX = (size2 - size) / this.scaleX,
      scaleOffsetSizeY = (size2 - size) / this.scaleY,
      height = this.height,
      width = this.width;

  ctx.save();

  ctx.lineWidth = 1 / Math.max(this.scaleX, this.scaleY);

  ctx.globalAlpha = 1; //this.isMoving ? this.borderOpacityWhenMoving : 1;
  ctx.strokeStyle = ctx.fillStyle = '#333333';

  // top-left
  _left = left - scaleOffsetX - strokeWidth2 - paddingX;
  _top = top - scaleOffsetY - strokeWidth2 - paddingY;

  ctx.clearRect(_left, _top, sizeX, sizeY);  
  ctx.drawImage(topLeftImage, _left, _top, sizeX, sizeY);

  // top-right
  _left = left + width - scaleOffsetX + strokeWidth2 + paddingX;
  _top = top - scaleOffsetY - strokeWidth2 - paddingY;

  ctx.clearRect(_left, _top, sizeX, sizeY);  
  ctx.drawImage(topRightImage, _left, _top, sizeX, sizeY);

  // bottom-left
  _left = left - scaleOffsetX - strokeWidth2 - paddingX;
  _top = top + height + scaleOffsetSizeY + strokeWidth2 + paddingY;

  ctx.clearRect(_left, _top, sizeX, sizeY);
  ctx.strokeRect(_left, _top, sizeX, sizeY);

  // bottom-right
  _left = left + width + scaleOffsetSizeX + strokeWidth2 + paddingX;
  _top = top + height + scaleOffsetSizeY + strokeWidth2 + paddingY;

  ctx.clearRect(_left, _top, sizeX, sizeY);
  ctx.drawImage(bottomRightImage, _left, _top, sizeX, sizeY);

  ctx.restore();

  return this;
};