opt: opt overlay event trigger display.

Author: liihuu

src/Store.ts

@@ -1236,10 +1236,12 @@ export default class StoreImp implements Store {
       if (isValid(OverlayClazz)) {
         const id = create.id ?? createId(OVERLAY_ID_PREFIX)
         const overlay = new OverlayClazz()
+        const paneId = overlay.paneId
         create.id = id
         create.groupId ??= id
+        const zLevel = this.getOverlaysByPaneId(paneId).length
+        create.zLevel ??= zLevel
         overlay.override(create)
-        const paneId = overlay.paneId
         if (!updatePaneIds.includes(paneId)) {
           updatePaneIds.push(paneId)
         }
@@ -1383,6 +1385,7 @@ export default class StoreImp implements Store {
         let ignoreUpdateFlag = false
         let sortFlag = false
         if (overlay !== null) {
+          overlay.override({ zLevel: overlay.getPrevZLevel() })
           sortFlag = true
           if (isFunction(overlay.onMouseLeave)) {
             overlay.onMouseLeave({ chart: this._chart, overlay, figureKey, figureIndex, ...event })
@@ -1391,6 +1394,8 @@ export default class StoreImp implements Store {
         }
 
         if (infoOverlay !== null) {
+          infoOverlay.setPrevZLevel(infoOverlay.zLevel)
+          infoOverlay.override({ zLevel: Number.MAX_SAFE_INTEGER })
           sortFlag = true
           if (isFunction(infoOverlay.onMouseEnter)) {
             infoOverlay.onMouseEnter({ chart: this._chart, overlay: infoOverlay, figureKey: info.figureKey, figureIndex: info.figureIndex, ...event })

src/component/Overlay.ts

@@ -322,6 +322,8 @@ export default class OverlayImp implements Overlay {
   onSelected: Nullable<OverlayEventCallback> = null
   onDeselected: Nullable<OverlayEventCallback> = null
 
+  private _prevZLevel = 0
+
   private _prevOverlay: Overlay
 
   private _prevPressedPoint: Nullable<Partial<Point>> = null
@@ -393,6 +395,10 @@ export default class OverlayImp implements Overlay {
     }
   }
 
+  getPrevZLevel (): number { return this._prevZLevel }
+
+  setPrevZLevel (zLevel: number): void { this._prevZLevel = zLevel }
+
   shouldUpdate (): { draw: boolean, sort: boolean } {
     const sort = this._prevOverlay.zLevel !== this.zLevel
     const draw = sort ||