KonvaJS:如何用箭头连接两个形状？

Question

我想使用Konvajs来执行以下任务:

1. 在画布上绘制两个矩形组.每个组包含一个矩形,文本和一个圆圈
2. 当我使用鼠标从圆圈拖动时,它会在拖动时绘制箭头.
3. 当我将箭头拖放到另一个组时,它会停止绘制并将两个组边对边连接

像这样的东西:

是否有任何本机方法支持形状之间的连接？有人能告诉我一些例子吗？

Answer 1

我已连接Konva.Circles。但是图像的逻辑也将相同。请找到笨蛋

var width = window.innerWidth;
    var height = window.innerHeight;

    var stage = new Konva.Stage({
      container: 'container',
      width: width,
      height: height
    });

    var layer = new Konva.Layer();

    var circle = new Konva.Circle({
      x: stage.getWidth() / 2,
      y: stage.getHeight() / 2,
      radius: 40,
      fill: 'green',
      stroke: 'black',
      strokeWidth: 2,
      draggable: true
    });

    var circleA = new Konva.Circle({
      x: stage.getWidth() / 5,
      y: stage.getHeight() / 5,
      radius: 30,
      fill: 'red',
      stroke: 'black',
      strokeWidth: 2,
      draggable: true
    });

    var arrow = new Konva.Arrow({
      points: [circle.getX(), circle.getY(), circleA.getX(), circleA.getY()],
      pointerLength: 10,
      pointerWidth: 10,
      fill: 'black',
      stroke: 'black',
      strokeWidth: 4
    });

    function adjustPoint(e){
      var p=[circle.getX(), circle.getY(), circleA.getX(), circleA.getY()];
      arrow.setPoints(p);
      layer.draw();
    }

    circle.on('dragmove', adjustPoint);

    circleA.on('dragmove', adjustPoint);

    layer.add(circleA);
    // add the shape to the layer
    layer.add(circle);
    layer.add(arrow);

    // add the layer to the stage
    stage.add(layer);