From 3d2846faf6e5be64c152e81e714096c3d8a1750e Mon Sep 17 00:00:00 2001
From: linyuan <yuanlincuc@gmail.com>
Date: Thu, 21 Dec 2023 12:09:34 +0800
Subject: [PATCH] feature: container scroll

---
 .../v3/components/day/EventWrapper.tsx        |  9 ++-
 src/view/LCalendar/v3/utils/selector.ts       | 80 +++++++++++++++----
 2 files changed, 70 insertions(+), 19 deletions(-)

diff --git a/src/view/LCalendar/v3/components/day/EventWrapper.tsx b/src/view/LCalendar/v3/components/day/EventWrapper.tsx
index e3f461b..c46dee1 100644
--- a/src/view/LCalendar/v3/components/day/EventWrapper.tsx
+++ b/src/view/LCalendar/v3/components/day/EventWrapper.tsx
@@ -77,7 +77,7 @@ export const  EventWrapperComponent = function(props:React.PropsWithChildren<IPr
   }
 
 
-  const selector:Selector = new Selector()
+  const selector:Selector = new Selector(scrollContainer)
   // 整个滚动区域的容器
   const scrollRect = scrollContainer?.getBoundingClientRect()
   // 日历所有天数的容器
@@ -110,6 +110,12 @@ export const  EventWrapperComponent = function(props:React.PropsWithChildren<IPr
     return false
   })
   selector.on('selecting', (data:ICoordinates) => {
+
+    // 整个滚动区域的容器
+    const scrollRect = scrollContainer?.getBoundingClientRect()
+    // 日历所有天数的容器
+    const daysRect = daysContainer?.getBoundingClientRect()
+
     const timestamp = getTimeFromPoint(
       scrollRect,
       daysRect,
@@ -119,7 +125,6 @@ export const  EventWrapperComponent = function(props:React.PropsWithChildren<IPr
       intervalHeight,
       intervalMinutes
     )
-    selector.updateParentScroll(scrollContainer, data)
     // if (scrollContainer) {
     //   setTimeout(() => {
     //     scrollContainer.scrollTop = scrollContainer.scrollTop + 10
diff --git a/src/view/LCalendar/v3/utils/selector.ts b/src/view/LCalendar/v3/utils/selector.ts
index 446a193..38910bf 100644
--- a/src/view/LCalendar/v3/utils/selector.ts
+++ b/src/view/LCalendar/v3/utils/selector.ts
@@ -13,37 +13,80 @@ function addDocEventListener(type:string, fn:(arg:any)=>any) {
 
 export class Selector {
   public listeners: IAny
-  constructor() {
+  public scrollContainer:HTMLDivElement
+  public  coordinate:ICoordinates|null
+  public timerID:NodeJS.Timeout|null
+  constructor(scrollContainer:HTMLDivElement) {
     this.handleInitialEvent = this.handleInitialEvent.bind(this)
     this.handleTerminatingEvent = this.handleTerminatingEvent.bind(this)
+    this.updateParentScroll = this.updateParentScroll.bind(this)
+    this.clearUpdateParentScroll = this.clearUpdateParentScroll.bind(this)
     this.listeners = Object.create(null)
-  }
-  updateParentScroll(scrollContainer:HTMLDivElement, coordinate:ICoordinates) {
-    const scrollRect = scrollContainer.getBoundingClientRect()
-    const scrollRectTop = scrollRect.top
-    const scrollRectBottom = scrollRect.bottom
-    const mousePointY = coordinate.clientY
 
-    const distanceTop = mousePointY - scrollRectTop
-    const distanceBottom = scrollRectBottom - mousePointY
 
-    const thresholdDistance = 20
-    if (distanceTop < thresholdDistance) {
-      scrollContainer.scrollTop = scrollContainer.scrollTop - 10
-    } else if (distanceBottom < thresholdDistance) {
-      scrollContainer.scrollTop = scrollContainer.scrollTop + 10
+    this.scrollContainer = scrollContainer // 记录滚动的容器元素
+    this.coordinate = null // 记录鼠标坐标点
+    this.timerID = null
+  }
+  updateParentScroll() {
+    const scrollContainer = this.scrollContainer
+    const coordinate = this.coordinate
+    if (!coordinate || !scrollContainer) {
+      return
     }
+    setTimeout(() => {
+
+      const scrollRect = scrollContainer.getBoundingClientRect()
+      const scrollRectTop = scrollRect.top
+      const scrollRectBottom = scrollRect.bottom
+      const mousePointY = coordinate.clientY
+
+      const distanceTop = mousePointY - scrollRectTop
+      const distanceBottom = scrollRectBottom - mousePointY
+
+      // 距离上下边界的阈值
+      const thresholdDistance = 20
+      // 设置每一帧的滚动速度
+      const scrollSpeed = 2
+
+      // 之前距离滚动框未滚动的位置
+      const beforeScrollTop = scrollContainer.scrollTop
+      if (distanceTop < thresholdDistance) {
+        // 向上滚动
+        scrollContainer.scrollTop = beforeScrollTop - scrollSpeed
+        // 新的坐标点
+        coordinate.clientY -= beforeScrollTop - scrollContainer.scrollTop
+      } else if (distanceBottom < thresholdDistance) {
+        // 向下滚动
+        scrollContainer.scrollTop = beforeScrollTop + scrollSpeed
+        coordinate.clientY +=  scrollContainer.scrollTop - beforeScrollTop
+      }
 
+      this.emit('selecting', coordinate)
+    })
 
-    console.log(
-      distanceTop, distanceBottom, distanceBottom + distanceTop
-    )
 
     // document.addEventListener('click', (e) => {
     //   console.log('pageY:', e.pageY)
     //   console.log('clientY:', e.clientY)
     // })
   }
+  addUpdateParentScroll() {
+    if (this.timerID !== null) {
+      return
+    }
+    this.timerID = setInterval(() => {
+      requestAnimationFrame(this.updateParentScroll)
+    })
+  }
+  clearUpdateParentScroll() {
+    if (this.timerID === null) {
+      return
+    }
+    clearInterval(this.timerID)
+    this.timerID = null
+    this.coordinate = null
+  }
   removeEndListener() {
     return
   }
@@ -85,12 +128,15 @@ export class Selector {
   }
   handleMoveEvent(e:React.MouseEvent) {
     const selectingCoordinates = getEventCoordinates(e)
+    this.coordinate = selectingCoordinates
+    this.addUpdateParentScroll()
     this.emit('selecting', selectingCoordinates)
   }
   handleTerminatingEvent(e:React.MouseEvent) {
     this.removeMoveListener()
     this.removeEndListener()
     const endCoordinates = getEventCoordinates(e)
+    this.clearUpdateParentScroll()
     this.emit('select', endCoordinates)
   }
 }