perf: 优化画布拖拽逻辑

2026-04-23 00:00:12 +08:00 · 2022-12-16 22:18:24 +08:00
parent 0d4e83c940
commit 405e884e70
4 changed files with 296 additions and 276 deletions
@@ -1,49 +1,157 @@
 <template>
-  <sketch-rule
-    v-if="configShow"
-    :thick="thick"
-    :scale="scale"
-    :width="canvasBox().width"
-    :height="canvasBox().height"
-    :startX="startX"
-    :startY="startY"
-    :lines="lines"
-  ></sketch-rule>
+  <div class="go-sketch-rule">
+    <sketch-rule
+      v-if="sketchRuleReDraw"
+      :thick="thick"
+      :scale="scale"
+      :width="canvasBox().width"
+      :height="canvasBox().height"
+      :startX="startX"
+      :startY="startY"
+      :lines="lines"
+      :palette="paletteStyle"
+    >
+    </sketch-rule>
+    <div ref="$app" class="edit-screens" @scroll="handleScroll">
+      <div ref="$container" class="edit-screen-container" :style="{ width: width * 2 + 'px' }">
+        <div
+          ref="refSketchRuleBox"
+          class="canvas"
+          @mousedown="dragCanvas"
+          :style="{ marginLeft: '-' + (canvasBox().width / 2 - 25) + 'px' }"
+        >
+          <div :style="{ pointerEvents: isPressSpace ? 'none' : 'auto' }">
+            <slot></slot>
+          </div>
+        </div>
+      </div>
+    </div>
+    <!-- 修复右下角白点用的 -->
+    <div v-if="designStore.getDarkTheme" class="fix-edit-screens-block"></div>
+  </div>
 </template>
-
 <script setup lang="ts">
-import { ref, toRefs, computed, watch, nextTick, onBeforeUnmount } from 'vue'
-import { useChartEditStore } from '@/store/modules/chartEditStore/chartEditStore'
+import { ref, reactive, onMounted, toRefs, watch, onUnmounted, computed } from 'vue'
+import { listen } from 'dom-helpers'
 import { useDesignStore } from '@/store/modules/designStore/designStore'
-import { useChartLayoutStore } from '@/store/modules/chartLayoutStore/chartLayoutStore'
+import { useChartEditStore } from '@/store/modules/chartEditStore/chartEditStore'

 const chartEditStore = useChartEditStore()
-const chartLayoutStore = useChartLayoutStore()
 const designStore = useDesignStore()

-const { width, height } = toRefs(chartEditStore.getEditCanvasConfig)
-const { scale, lockScale } = toRefs(chartEditStore.getEditCanvas)
-const { getLayers, getCharts, getDetails } = toRefs(chartLayoutStore)
-
-const configShow = ref(true)
-
-// x轴标尺开始的坐标数值
-const startX = -10
-// y轴标尺开始的坐标数值
-const startY = -10
-// 标尺的厚度
 const thick = 20
-// 初始化水平标尺上的参考线
-const lines = {
-  h: [],
-  v: []
+let prevMoveXVallue = [0, 0]
+let prevMoveYVallue = [0, 0]
+
+const $app = ref()
+const sketchRuleReDraw = ref(true)
+const refSketchRuleBox = ref()
+const $container = ref()
+const isPressSpace = ref(false)
+const cursorStyle = ref('auto')
+const { width, height } = toRefs(chartEditStore.getEditCanvasConfig)
+const startX = ref(0)
+const startY = ref(0)
+const lines = reactive({ h: [], v: [] })
+
+const scale = computed(() => {
+  return chartEditStore.getEditCanvas.scale
+})
+
+// 滚动条拖动的高度
+const containerWidth = computed(() => {
+  return `${height.value * 2}px`
+})
+
+// 主题
+const paletteStyle = computed(() => {
+  const isDarkTheme = designStore.getDarkTheme
+  return isDarkTheme
+    ? {
+        bgColor: '#18181c',
+        longfgColor: '#4d4d4d',
+        shortfgColor: '#4d4d4d',
+        fontColor: '#4d4d4d',
+        shadowColor: '#18181c',
+        borderColor: '#18181c',
+        cornerActiveColor: '#18181c'
+      }
+    : {}
+})
+
+// 颜色
+const themeColor = computed(() => {
+  return designStore.getAppTheme
+})
+
+const handleWheel = (e: any) => {
+  e.preventDefault()
+  if (e.ctrlKey || e.metaKey) {
+    let resScale = scale.value
+    // 放大(200%)
+    if (e.wheelDelta >= 0 && scale.value < 2) {
+      resScale = scale.value + 0.05
+      chartEditStore.setScale(resScale)
+      return
+    }
+    // 缩小(10%)
+    if (e.wheelDelta < 0 && scale.value > 0.1) {
+      resScale = scale.value - 0.05
+      chartEditStore.setScale(resScale)
+    }
+  }
+}
+
+const handleScroll = () => {
+  if (!$app.value) return
+  const screensRect = $app.value.getBoundingClientRect()
+  const canvasRect = refSketchRuleBox.value.getBoundingClientRect()
+  // 标尺开始的刻度
+  startX.value = (screensRect.left + thick - canvasRect.left) / scale.value
+  startY.value = (screensRect.top + thick - canvasRect.top) / scale.value
+}
+
+const dragCanvas = (e: any) => {
+  if (!window.$KeyboardActive?.space) return
+
+  // @ts-ignore
+  document.activeElement?.blur()
+
+  e.preventDefault()
+  e.stopPropagation()
+
+  const startX = e.pageX
+  const startY = e.pageY
+
+  const listenMousemove = listen(window, 'mousemove', (e: any) => {
+    const nx = e.pageX - startX
+    const ny = e.pageY - startY
+
+    const [prevMoveX1, prevMoveX2] = prevMoveXVallue
+    const [prevMoveY1, prevMoveY2] = prevMoveYVallue
+
+    prevMoveXVallue = [prevMoveX2, nx]
+    prevMoveYVallue = [prevMoveY2, ny]
+
+    $app.value.scrollLeft -=
+      prevMoveX2 > prevMoveX1 ? Math.abs(prevMoveX2 - prevMoveX1) : -Math.abs(prevMoveX2 - prevMoveX1)
+    $app.value.scrollTop -=
+      prevMoveY2 > prevMoveY1 ? Math.abs(prevMoveY2 - prevMoveY1) : -Math.abs(prevMoveY2 - prevMoveY1)
+  })
+
+  const listenMouseup = listen(window, 'mouseup', () => {
+    listenMousemove()
+    listenMouseup()
+    prevMoveXVallue = [0, 0]
+    prevMoveYVallue = [0, 0]
+  })
 }

 const canvasBox = () => {
  const layoutDom = document.getElementById('go-chart-edit-layout')
  if (layoutDom) {
    return {
-      height: layoutDom.clientHeight - 40,
+      height: layoutDom.clientHeight - 40 - 44,
      width: layoutDom.clientWidth
    }
  }
@@ -53,53 +161,61 @@ const canvasBox = () => {
  }
 }

-// 颜色
-const themeColor = computed(() => {
-  return designStore.getAppTheme
-})
+// 在位置不动的情况下重绘标尺
+const reDraw = () => {
+  sketchRuleReDraw.value = false
+  setTimeout(() => {
+    sketchRuleReDraw.value = true
+  }, 10)
+}
+
+watch(
+  () => designStore.getDarkTheme,
+  () => {
+    reDraw()
+  }
+)

 // 处理标尺重制大小
-const ruleChangeHandle = () => {
-  configShow.value = false
-  setTimeout(() => {
-    configShow.value = true
-  })
-}
-
-const ruleChangeHandleTimeOut = () => {
-  if (lockScale.value) {
-    setTimeout(() => {
-      ruleChangeHandle()
-    }, 500)
-  }
-}
-
 watch(
  () => scale.value,
-  () => ruleChangeHandle()
+  (newValue, oldValue) => {
+    if (oldValue !== newValue) {
+      handleScroll()
+      chartEditStore.setScale(newValue)
+    }
+  }
 )

 watch(
-  () => getLayers.value,
-  () => ruleChangeHandleTimeOut()
+  () => isPressSpace.value,
+  newValue => {
+    cursorStyle.value = newValue ? 'grab' : 'auto'
+  }
 )

-watch(
-  () => getCharts.value,
-  () => ruleChangeHandleTimeOut()
-)
+onMounted(() => {
+  if ($app.value) {
+    $app.value.addEventListener('wheel', handleWheel, { passive: false })
+    // 滚动居中
+    $app.value.scrollLeft = $container.value.getBoundingClientRect().width / 2 - canvasBox().width / 2
+  }
+})

-watch(
-  () => getDetails.value,
-  () => ruleChangeHandleTimeOut()
-)
+onUnmounted(() => {
+  if ($app.value) {
+    $app.value.removeEventListener('wheel', handleWheel)
+  }
+})

+window.onKeySpacePressHold = (isHold: boolean) => {
+  isPressSpace.value = isHold
+}
 </script>

 <style>
 /* 使用 SCSS 会报错，直接使用最基础的 CSS 进行修改，
 此库有计划 Vue3 版本，但是开发的时候还没发布 */
-
 #mb-ruler {
  top: 0;
  left: 0;
@@ -142,3 +258,69 @@ watch(
  border-width: 0 !important;
 }
 </style>
+
+<style lang="scss" scoped>
+@include go('sketch-rule') {
+  position: relative;
+  overflow: hidden;
+  width: 100%;
+  height: 100%;
+
+  .edit-screens {
+    position: absolute;
+    width: 100%;
+    height: 100%;
+    overflow: auto;
+    user-select: none;
+    padding-bottom: 0px;
+
+    /* firefox */
+    scrollbar-color: rgba(144, 146, 152, 0.3) transparent;
+    scrollbar-width: thin;
+
+    /* chrome */
+    &::-webkit-scrollbar,
+    &::-webkit-scrollbar-track-piece {
+      background-color: transparent;
+    }
+
+    &::-webkit-scrollbar {
+      width: 7px;
+    }
+
+    &::-webkit-scrollbar-thumb {
+      border-radius: 5px;
+      background-color: rgba(144, 146, 152, 0.3);
+    }
+  }
+
+  .fix-edit-screens-block {
+    position: absolute;
+    bottom: 0;
+    right: 0;
+    width: 10px;
+    height: 10px;
+    background-color: $--color-dark-bg-1;
+  }
+
+  .edit-screen-container {
+    position: absolute;
+    height: v-bind('containerWidth');
+  }
+
+  .canvas {
+    position: absolute;
+    top: 80px;
+    left: 50%;
+    transform-origin: 50% 0;
+
+    &:hover {
+      cursor: v-bind('cursorStyle');
+    }
+
+    &:active {
+      cursor: crosshair;
+    }
+  }
+}
+</style>