ConnectionsLayer.vue

<template>
  <div class="connections">
    <canvas id="pixi"></canvas>
  </div>
</template>

<script>
import { mapState } from 'vuex'
import * as PIXI from 'pixi.js'

export default {
  name: 'ConnectionsLayer',
  computed: mapState({
    toolmode: (state) => state.ui.mode,
  }),
  // data() {
  //   // return {
  //   //   // app: new PIXI.Application({
  //   //   //   width: window.innerWidth,
  //   //   //   height: window.innerHeight,
  //   //   //   antialias: true,
  //   //   //   transparent: true,
  //   //   //   view: canvas,
  //   //   // }),
  //   // }
  // },
  methods: {
    drawPixi() {
      var canvas = document.getElementById('pixi')

      const app = new PIXI.Application({
        width: window.innerWidth,
        height: window.innerHeight,
        antialias: true,
        transparent: true,
        view: canvas,
      })

      let graphics = new PIXI.Graphics()
      ///graphics.x = app.renderer.width / 2
      //graphics.y = app.renderer.width / 2
      //document.body.appendChild(app.view)

      // graphics.lineStyle(0)
      // graphics.beginFill(0xde3249, 1)
      // graphics.drawCircle(100, 250, 50)
      // graphics.endFill()

      // graphics.lineStyle(0)
      // graphics.beginFill(0xde3249, 1)
      // graphics.drawCircle(300, 250, 50)
      // graphics.endFill()

      graphics.lineStyle(8, 0x000000)
      //start
      graphics.moveTo(300, 250)
      //end
      graphics.lineTo(500, 250)

      // graphics.lineStyle(2, 0xffffff, 1)
      // graphics.moveTo(0, 0)
      app.stage.addChild(graphics)
    },
  },

  mounted() {
    this.drawPixi()
  },
}

// Opt-in to interactivity
// graphics.interactive = true

// // Shows hand cursor
// graphics.buttonMode = true

// graphics
//   .on('pointerdown', onDragStart)
//   .on('pointerup', onDragEnd)
//   .on('pointerupoutside', onDragEnd)
//   .on('pointermove', onDragMove)

// let lines = []
// let initialMoveTo

// function onDragStart(event) {
//   this.dragging = true

//   let mouseX = event.data.global.x
//   let mouseY = event.data.global.y

//   initialMoveTo = [mouseX, mouseY]

//   let line = new PIXI.Graphics()
//   line.lineStyle(6, 0xffffff)
//   line.moveTo(mouseX, mouseY)

//   lines = [line].concat(lines)

//   app.stage.addChild(line)
// }

// function onDragEnd() {
//   this.dragging = false
// }

// function onDragMove(event) {
//   if (this.dragging) {
//     let mouseX = event.data.global.x
//     let mouseY = event.data.global.y
//     lines[0].clear()
//     lines[0].lineStyle(6, 0xffffff)
//     lines[0].moveTo(initialMoveTo[0], initialMoveTo[1])
//     lines[0].lineTo(mouseX, mouseY)
//   }
// }
</script>