From b8a3be7a626791234f2ac89f1d13d8f737aa0292 Mon Sep 17 00:00:00 2001
From: wanglin2 <1013335014@qq.com>
Date: Mon, 3 Jul 2023 22:26:11 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96=E8=A7=A6=E6=8E=A7=E6=9D=BF?=
 =?UTF-8?q?=E7=BC=A9=E6=94=BE=E7=94=BB=E5=B8=83=E6=97=B6=E5=B9=85=E5=BA=A6?=
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---
 simple-mind-map/src/core/view/View.js | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/simple-mind-map/src/core/view/View.js b/simple-mind-map/src/core/view/View.js
index bafe7645..2f89bf66 100644
--- a/simple-mind-map/src/core/view/View.js
+++ b/simple-mind-map/src/core/view/View.js
@@ -82,12 +82,12 @@ class View {
           // 鼠标滚轮，向上和向左，都是缩小
           case CONSTANTS.DIR.UP:
           case CONSTANTS.DIR.LEFT:
-            mousewheelZoomActionReverse ? this.enlarge(cx, cy) : this.narrow(cx, cy)
+            mousewheelZoomActionReverse ? this.enlarge(cx, cy, isTouchPad) : this.narrow(cx, cy, isTouchPad)
             break
           // 鼠标滚轮，向下和向右，都是放大
           case CONSTANTS.DIR.DOWN:
           case CONSTANTS.DIR.RIGHT:
-            mousewheelZoomActionReverse ? this.narrow(cx, cy) : this.enlarge(cx, cy)
+            mousewheelZoomActionReverse ? this.narrow(cx, cy, isTouchPad) : this.enlarge(cx, cy, isTouchPad)
             break
         }
       } else {// 鼠标滚轮事件控制画布移动
@@ -199,16 +199,18 @@ class View {
   }
 
   //  缩小
-  narrow(cx, cy) {
-    const scale = Math.max(this.scale - this.mindMap.opt.scaleRatio, 0.1)
+  narrow(cx, cy, isTouchPad) {
+    const scaleRatio = this.mindMap.opt.scaleRatio / (isTouchPad ? 5 : 1)
+    const scale = Math.max(this.scale - scaleRatio, 0.1)
     this.scaleInCenter(scale, cx, cy)
     this.transform()
     this.mindMap.emit('scale', this.scale)
   }
 
   //  放大
-  enlarge(cx, cy) {
-    const scale = this.scale + this.mindMap.opt.scaleRatio
+  enlarge(cx, cy, isTouchPad) {
+    const scaleRatio = this.mindMap.opt.scaleRatio / (isTouchPad ? 5 : 1)
+    const scale = this.scale + scaleRatio
     this.scaleInCenter(scale, cx, cy)
     this.transform()
     this.mindMap.emit('scale', this.scale)