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fix: 修复箭头放缩变形及比例不一致的问题 #373

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merged 1 commit into from
May 9, 2024
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fix: 修复箭头放缩变形及比例不一致的问题 #373

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13 changes: 9 additions & 4 deletions packages/core/objects/Arrow.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,18 +21,23 @@ fabric.Arrow = fabric.util.createClass(fabric.Line, {
_render(ctx) {
this.callSuper('_render', ctx);
ctx.save();
const xDiff = this.x2 - this.x1;
const yDiff = this.y2 - this.y1;
// 乘或除对应的scaleX(Y)，抵消元素放缩造成的影响，使箭头不会变形
ctx.scale(1 / this.scaleX, 1 / this.scaleY);
const xDiff = (this.x2 - this.x1) * this.scaleX;
const yDiff = (this.y2 - this.y1) * this.scaleY;
const angle = Math.atan2(yDiff, xDiff);
ctx.translate((this.x2 - this.x1) / 2, (this.y2 - this.y1) / 2);
ctx.translate(((this.x2 - this.x1) / 2) * this.scaleX, ((this.y2 - this.y1) / 2) * this.scaleY);
ctx.rotate(angle);
ctx.beginPath();
// Move 5px in front of line to start the arrow so it does not have the square line end showing in front (0,0)
ctx.moveTo(5, 0);
ctx.lineTo(-5, 5);
ctx.lineTo(-5, -5);
ctx.closePath();
ctx.fillStyle = this.stroke;
ctx.lineWidth = this.lineWidth;
ctx.strokeStyle = this.stroke;
ctx.fillStyle = this.fill;
ctx.stroke();
ctx.fill();
ctx.restore();
},
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