canvas

src/pages/canvas.vue

@@ -0,0 +1,148 @@
+<template>
+  <div class="canvas-wrap">
+    <canvas id="lineCanvas" width="400" height="500"></canvas>
+    <canvas id="carCanvas" width="400" height="500"></canvas>
+  </div>
+</template>
+
+<script>
+import Easing from '@config/Easing.js'
+export default {
+  data () {
+    return {
+      keyPoints: [{x: 160, y: 200}, {x: 60, y: 200}, {x: 60, y: 400}, {x: 160, y: 400}]
+    }
+  },
+  mounted () {
+    setTimeout(() => {
+      this.handleCanvasLine()
+    }, 5000)
+    setTimeout(() => {
+      this.handleCanvasCar()
+    }, 5900)
+  },
+  methods: {
+    handleCanvasLine () {
+      const canvas = document.querySelector('#lineCanvas')
+      const ctx = canvas.getContext('2d')
+      let img = new Image()
+      img.src = require('../images/che.png')
+      // 设置线条样式
+      ctx.lineWidth = 1
+      ctx.lineJoin = 'round'
+      ctx.lineCap = 'round'
+      let prevX = this.keyPoints[0].x
+      let prevY = this.keyPoints[0].y
+      let nextX
+      let nextY
+      // 第一帧执行的时间
+      let startTime
+      // 期望动画持续的时间
+      const duration = 900
+      // 动画被切分成若干段,每一段所占总进度的比例
+      const partProportion = 1 / (this.keyPoints.length - 1)
+      // 缓存绘制第n段线段的n值,为了在进行下一段绘制前把这一段线段的末尾补齐
+      let lineIndexCache = 1
+      // 动画帧绘制方法currentTime是requestAnimation执行回调方法step时会传入的一个执行时的时间(由performance.now()获得).
+      const step = (currentTime) => {
+        // 第一帧绘制时记录下开始的时间
+        !startTime && (startTime = currentTime)
+        // 已经过去的时间(ms)
+        const timeElapsed = currentTime - startTime
+        // 动画执行的进度 {0,1}
+        let progress = Math.min(timeElapsed / duration, 1)
+        // 加入二次方缓动函数
+        progress = Easing.Quadratic.In(progress)
+        // 描述当前所绘制的是第几段线段
+        const lineIndex = Math.min(Math.floor(progress / partProportion) + 1, this.keyPoints.length - 1)
+        //  当前线段的进度 {0,1}
+        const partProgress = (progress - (lineIndex - 1) * partProportion) / partProportion
+        // 绘制方法
+        const draw = () => {
+          ctx.strokeStyle = `rgba(${81 + 175 * Math.abs(1 - progress * 2)}, ${160 - 160 * Math.abs(progress * 2 - 1)}, ${255},${1})`
+          ctx.beginPath()
+          ctx.moveTo(prevX, prevY)
+          // 当绘制下一段线段前,把上一段末尾缺失的部分补齐
+          if (lineIndex !== lineIndexCache) {
+            ctx.lineTo(this.keyPoints[lineIndex - 1].x, this.keyPoints[lineIndex - 1].y)
+            lineIndexCache = lineIndex
+          }
+          prevX = nextX = ~~(this.keyPoints[lineIndex - 1].x + ((this.keyPoints[lineIndex]).x - this.keyPoints[lineIndex - 1].x) * partProgress)
+          prevY = nextY = ~~(this.keyPoints[lineIndex - 1].y + ((this.keyPoints[lineIndex]).y - this.keyPoints[lineIndex - 1].y) * partProgress)
+          ctx.lineTo(nextX, nextY)
+          ctx.stroke()
+        }
+        draw()
+        if (progress < 1) {
+          requestAnimationFrame(step)
+        } else {
+          console.log('动画执行完毕')
+        }
+      }
+      requestAnimationFrame(step)
+    },
+    handleCanvasCar () {
+      const canvas = document.querySelector('#carCanvas')
+      const ctx = canvas.getContext('2d')
+      let img = new Image()
+      img.src = require('../images/che.png')
+      let nextX
+      let nextY
+      // 第一帧执行的时间
+      let startTime
+      // 期望动画持续的时间
+      const duration = 2000
+      // 动画被切分成若干段,每一段所占总进度的比例
+      const partProportion = 1 / (this.keyPoints.length - 1)
+      // 缓存绘制第n段线段的n值,为了在进行下一段绘制前把这一段线段的末尾补齐
+      // 动画帧绘制方法currentTime是requestAnimation执行回调方法step时会传入的一个执行时的时间(由performance.now()获得).
+      const step = (currentTime) => {
+        // 第一帧绘制时记录下开始的时间
+        !startTime && (startTime = currentTime)
+        // 已经过去的时间(ms)
+        const timeElapsed = currentTime - startTime
+        // 动画执行的进度 {0,1}
+        let progress = Math.min(timeElapsed / duration, 1)
+        // 加入二次方缓动函数
+        progress = Easing.Quadratic.In(progress)
+        // 描述当前所绘制的是第几段线段
+        const lineIndex = Math.min(Math.floor(progress / partProportion) + 1, this.keyPoints.length - 1)
+        //  当前线段的进度 {0,1}
+        const partProgress = (progress - (lineIndex - 1) * partProportion) / partProportion
+        // 绘制方法
+        const draw = () => {
+          ctx.beginPath()
+          ctx.clearRect(0, 0, 400, 500)
+          nextX = ~~(this.keyPoints[lineIndex - 1].x + ((this.keyPoints[lineIndex]).x - this.keyPoints[lineIndex - 1].x) * partProgress)
+          nextY = ~~(this.keyPoints[lineIndex - 1].y + ((this.keyPoints[lineIndex]).y - this.keyPoints[lineIndex - 1].y) * partProgress)
+          ctx.drawImage(img, nextX - 15, nextY - 50, 30, 50)
+        }
+        draw()
+        if (progress < 1) {
+          requestAnimationFrame(step)
+        } else {
+          console.log('动画执行完毕')
+        }
+      }
+      requestAnimationFrame(step)
+    }
+  }
+}
+</script>
+
+<style lang="stylus" scoped>
+.canvas-wrap
+  position relative
+  width 100%
+  height 100%
+#lineCanvas
+  position absolute
+  left 0
+  top 0
+  z-index 10
+#carCanvas
+  position absolute
+  left 0
+  top 0
+  z-index 11
+</style>

src/pages/index.vue

@@ -1,111 +1,147 @@
 <template>
-  <div class="zd-row contianer">
-    <div class="zd-col-8 l-wrap">
-      <div class="zd-row filter-item border-b-0">
-        <div class="zd-col-10 filter-label">站点</div>
-        <div class="zd-col-13 filter-value">10-10-1</div>
-      </div>
-      <div class="zd-row filter-item">
-        <div class="zd-col-10 filter-label">目标站点</div>
-        <div class="zd-col-13 filter-value">
-          <el-select v-model="value" placeholder="请选择">
-            <el-option
-              v-for="item in options"
-              :key="item.value"
-              :label="item.label"
-              :value="item.value">
-            </el-option>
-          </el-select>
+  <div class="contianer">
+    <div class="zd-row content">
+      <div class="l-wrap">
+        <div class="zd-row">
+          <div class="zd-col-24 filter-name">站点：10-10-1</div>
+        </div>
+        <div class="item-wrap">
+          <div class="zd-row filter-item">
+            <div class="zd-col-10 filter-label">目标站点</div>
+            <div class="zd-col-13 filter-value">
+              <el-select v-model="value" placeholder="请选择">
+                <el-option
+                  v-for="item in options"
+                  :key="item.value"
+                  :label="item.label"
+                  :value="item.value">
+                </el-option>
+              </el-select>
+            </div>
+          </div>
+          <div class="zd-row filter-item">
+            <div class="zd-col-10 filter-label">物料类型</div>
+            <div class="zd-col-13 filter-value">
+              <el-select v-model="value" placeholder="请选择">
+                <el-option
+                  v-for="item in options"
+                  :key="item.value"
+                  :label="item.label"
+                  :value="item.value">
+                </el-option>
+              </el-select>
+            </div>
+          </div>
+          <div class="zd-row jcflexend button-wrap">
+            <button class="button btn-primary">确认下料</button>
+          </div>
+        </div>
+        <div class="item-wrap">
+          <div class="zd-row filter-item">
+            <div class="zd-col-10 filter-label">区域</div>
+            <div class="zd-col-13 filter-value">
+              <el-select v-model="value" placeholder="请选择">
+                <el-option
+                  v-for="item in options"
+                  :key="item.value"
+                  :label="item.label"
+                  :value="item.value">
+                </el-option>
+              </el-select>
+            </div>
+          </div>
+          <div class="zd-row jcflexend button-wrap">
+            <button class="button btn-primary">区域管控</button>
+          </div>
+        </div>
+        <div class="item-wrap">
+          <div class="zd-row filter-item">
+            <div class="zd-col-24 filter-value">
+              <el-select v-model="value" placeholder="请选择">
+                <el-option
+                  v-for="item in options"
+                  :key="item.value"
+                  :label="item.label"
+                  :value="item.value">
+                </el-option>
+              </el-select>
+            </div>
+          </div>
+        </div>
+        <div class="zd-row button-wrap">
+          <button class="zd-col-4 button button_s btn-primary">取消</button>
+          <button class="zd-col-6 button button_s btn-primary">强制完成</button>
+          <button class="zd-col-6 button button_s btn-primary">放货确认</button>
+          <button class="zd-col-6 button button_s btn-primary" @click="handleCanvasBG">卸货确认</button>
         </div>
       </div>
-      <div class="zd-row filter-item">
-        <div class="zd-col-10 filter-label">物料类型</div>
-        <div class="zd-col-13 filter-value">
-          <el-select v-model="value" placeholder="请选择">
-            <el-option
-              v-for="item in options"
-              :key="item.value"
-              :label="item.label"
-              :value="item.value">
-            </el-option>
-          </el-select>
-        </div>
-      </div>
-      <div class="zd-row jcflexend button-wrap">
-        <button class="button btn-primary">确认下料</button>
-      </div>
-      <div class="zd-row filter-item">
-        <div class="zd-col-10 filter-label">区域</div>
-        <div class="zd-col-13 filter-value">
-          <el-select v-model="value" placeholder="请选择">
-            <el-option
-              v-for="item in options"
-              :key="item.value"
-              :label="item.label"
-              :value="item.value">
-            </el-option>
-          </el-select>
-        </div>
-      </div>
-      <div class="zd-row jcflexend button-wrap">
-        <button class="button btn-primary">区域管控</button>
-      </div>
-      <div class="zd-row filter-item">
-        <div class="zd-col-24 filter-value">
-          <el-select v-model="value" placeholder="请选择">
-            <el-option
-              v-for="item in options"
-              :key="item.value"
-              :label="item.label"
-              :value="item.value">
-            </el-option>
-          </el-select>
-        </div>
-      </div>
-      <div class="zd-row button-wrap">
-        <button class="zd-col-6_w button button_s btn-primary">取消</button>
-        <button class="zd-col-6_w button button_s btn-primary">强制完成</button>
-        <button class="zd-col-6_w button button_s btn-primary">放货确认</button>
-        <button class="zd-col-6_w button button_s btn-primary">卸货确认</button>
+      <div class="r-wrap" @click="rectClick">
+        <t-canvas></t-canvas>
       </div>
     </div>
-    <div class="zd-col-16 r-wrap"></div>
   </div>
 </template>
 
 <script>
+import TCanvas from './canvas.vue'
 export default {
+  components: {
+    TCanvas
+  },
   data () {
     return {
       options: [{
         value: '选项1',
         label: '黄金糕'
       }],
-      value: ''
+      value: '',
+      points: [[160, 200], [60, 200], [60, 400], [160, 400]],
+      mapCoordinateList: [{x: 160, y: 200}, {x: 60, y: 200}, {x: 60, y: 400}, {x: 160, y: 400}]
+    }
+  },
+  methods: {
+    rectClick () {
+      var ev = window.event
+      // 获取相对于当前所指向对象的位置坐标
+      alert('x:' + ev.offsetX + 'y:' + ev.offsetY)
+    },
+    // handleCanvasBG () {
+    //   this.points.forEach(([x, y]) => {
+    //     this.drawDot(x, y)
+    //   })
+    // },
+    // drawDot (x1, y1, r) {
+    //   const myContext = document.getElementById('canvasBG')
+    //   const ctx = myContext.getContext('2d')
+    //   // ctx.save()
+    //   ctx.beginPath()
+    //   ctx.fillStyle = 'red'
+    //   ctx.arc(x1, y1, r)
+    // },
+    handleCanvasBG () {
+      const myContext = document.getElementById('canvasBG')
+      const ctx = myContext.getContext('2d')
+      ctx.beginPath()
+      this.mapCoordinateList.forEach((item, index) => {
+        if (index + 1 < this.mapCoordinateList.length) {
+          ctx.moveTo(item.x, item.y)
+          ctx.lineTo(this.mapCoordinateList[index + 1].x, this.mapCoordinateList[index + 1].y)
+          ctx.strokeStyle = 'yellow'
+          ctx.lineWidth = '20'
+          ctx.lineCap = 'round'
+        } else {
+          // ctx.moveTo(item.x, item.y)
+          // ctx.lineTo(this.mapCoordinateList[0].x, this.mapCoordinateList[0].y)
+        }
+      })
+      ctx.stroke()
     }
   }
 }
 </script>
 
 <style lang="stylus" scoped>
-@import '~@style/mixin'
-.contianer
-  _wh(100vw, 100vh)
-.l-wrap
-  height 100%
-  padding 1%
-.r-wrap
-  height 100%
-  padding 1%
-.zd-col-6_w
-  width 24%
-.filter-item
-  height 50px
-  border-bottom 2px solid #fff
-.border-b-0
-  border-bottom 0
-.filter-label
-  _font(14px, 50px, #fff,,)
-.filter-value
-  _font(16px, 50px, #fff,,right)
+// @import '~@style/mixin'
+#canvasBG
+  background-color: #999
 </style>