feat(Slider): add vertical prop (#4486)

* feat(Slider): add vertical prop

* fix: adjust

* Update README.md

Co-authored-by: neverland <chenjiahan@youzan.com>
Co-authored-by: neverland <chenjiahan@buaa.edu.cn>

example/pages/slider/index.js

@@ -2,19 +2,19 @@ import Page from '../../common/page';
 
 Page({
   data: {
-    currentValue: 50
+    currentValue: 50,
   },
 
   onChange(event) {
     wx.showToast({
       icon: 'none',
-      title: `当前值：${event.detail}`
+      title: `当前值：${event.detail}`,
     });
   },
 
   onDrag(event) {
     this.setData({
-      currentValue: event.detail.value
+      currentValue: event.detail.value,
     });
-  }
+  },
 });

example/pages/slider/index.wxml

@@ -63,3 +63,21 @@
     </view>
   </van-slider>
 </demo-block>
+
+<demo-block title="垂直方向">
+  <view style="height: 150px; padding-left: 30px;">
+    <van-slider
+      value="{{ currentValue }}"
+      vertical
+      custom-class="slider"
+      bind:change="onChange"
+    />
+    <van-slider
+      value="{{ [20, 60 ] }}"
+      vertical
+      range
+      custom-class="slider"
+      bind:change="onChange"
+    />
+  </view>
+</demo-block>

packages/slider/README.md

@@ -33,6 +33,25 @@ Page({
 });
 ```
 
+### 双滑块
+
+添加 `range` 属性就可以开启双滑块模式，确保 `value` 的值是一个数组。
+
+```html
+<van-slider value="{{ 10, 50 }}" range @change="onChange" />
+```
+
+```js
+Page({
+  onChange(event) {
+    wx.showToast({
+      icon: 'none',
+      title: `当前值：${event.detail}`,
+    });
+  },
+});
+```
+
 ### 指定选择范围
 
 ```html
@@ -79,6 +98,34 @@ Page({
 });
 ```
 
+### 垂直方向
+
+设置 `vertical` 属性后，滑块会垂直展示，且高度为 100% 父元素高度。
+
+```html
+<view style="height: 150px;">
+  <van-slider value="50" vertical bind:change="onChange" />
+  <van-slider
+    value="{{ [10, 50] }}"
+    range
+    vertical
+    style="margin-left: 100px;"
+    bind:change="onChange"
+  />
+</view>
+```
+
+```js
+Page({
+  onChange(event) {
+    wx.showToast({
+      icon: 'none',
+      title: `当前值：${event.detail}`,
+    });
+  },
+});
+```
+
 ## API
 
 ### Props
@@ -95,6 +142,7 @@ Page({
 | inactive-color | 进度条默认颜色 | _string_ | `#e5e5e5` |
 | use-slot-button | 是否使用按钮插槽 | _boolean_ | `false` |
 | range `v1.8.4` | 是否开启双滑块模式 | _boolean_ | `false` |
+| vertical `v1.8.5` | 是否垂直展示 | _boolean_ | `false` |
 
 ### Events
 

packages/slider/index.less

@@ -63,4 +63,35 @@
   &--disabled {
     opacity: var(--slider-disabled-opacity, @slider-disabled-opacity);
   }
+
+  &--vertical {
+    display: inline-block;
+    .theme(width, '@slider-bar-height');
+
+    height: 100%;
+
+    .van-slider__button-wrapper,
+    .van-slider__button-wrapper-right {
+      top: auto;
+      right: 50%;
+      bottom: 0;
+      transform: translate3d(50%, 50%, 0);
+    }
+
+    .van-slider__button-wrapper-left {
+      top: 0;
+      right: 50%;
+      left: auto;
+      transform: translate3d(50%, -50%, 0);
+    }
+
+    // use pseudo element to expand click area
+    &::before {
+      top: 0;
+      .theme(right, '-@padding-xs');
+
+      bottom: 0;
+      .theme(left, '-@padding-xs');
+    }
+  }
 }

packages/slider/index.ts

@@ -1,7 +1,7 @@
 import { VantComponent } from '../common/component';
 import { touch } from '../mixins/touch';
 import { canIUseModel } from '../common/version';
-import { getRect } from '../common/utils';
+import { getRect, addUnit } from '../common/utils';
 
 type SliderValue = number | [number, number];
 
@@ -35,6 +35,7 @@ VantComponent({
         }
       },
     },
+    vertical: Boolean,
     barHeight: null,
   },
 
@@ -77,7 +78,10 @@ VantComponent({
       this.dragStatus = 'draging';
 
       getRect(this, '.van-slider').then((rect) => {
-        const diff = (this.deltaX / rect.width) * this.getRange();
+        const { vertical } = this.data;
+        const delta = vertical ? this.deltaY : this.deltaX;
+        const total = vertical ? rect.height : rect.width;
+        const diff = (delta / total) * this.getRange();
 
         if (this.isRange(this.startValue)) {
           (this.newValue as [number, number])[this.buttonIndex] =
@@ -104,8 +108,12 @@ VantComponent({
       const { min } = this.data;
 
       getRect(this, '.van-slider').then((rect) => {
-        const value =
-          ((event.detail.x - rect.left) / rect.width) * this.getRange() + min;
+        const { vertical } = this.data;
+        const delta = vertical
+          ? event.detail.y - rect.top
+          : event.detail.x - rect.left;
+        const total = vertical ? rect.height : rect.width;
+        const value = Number(min) + (delta / total) * this.getRange();
 
         if (this.isRange(this.value)) {
           const [left, right] = this.value;
@@ -146,10 +154,18 @@ VantComponent({
 
       this.value = value;
 
+      const { vertical } = this.data;
+      const mainAxis = vertical ? 'height' : 'width';
+
       this.setData({
+        wrapperStyle: `
+          background: ${this.data.inactiveColor || ''};
+          ${mainAxis}: ${addUnit(this.data.barHeight) || ''};
+        `,
         barStyle: `
-          width: ${this.calcMainAxis()};
-          left: ${this.isRange(value) ? `${value[0]}%` : 0};
+          ${mainAxis}: ${this.calcMainAxis()};
+          left: ${vertical ? 0 : this.calcOffset()};
+          top: ${vertical ? this.calcOffset() : 0};
           ${drag ? 'transition: none;' : ''}
         `,
       });
@@ -187,6 +203,17 @@ VantComponent({
       return `${((value - Number(min)) * 100) / scope}%`;
     },
 
+    // 计算选中条的开始位置的偏移量
+    calcOffset() {
+      const { value } = this;
+      const { min } = this.data;
+      const scope = this.getScope();
+      if (this.isRange(value)) {
+        return `${((value[0] - Number(min)) * 100) / scope}%`;
+      }
+      return '0%';
+    },
+
     format(value: number) {
       const { max, min, step } = this.data;
       return Math.round(Math.max(min, Math.min(value, max)) / step) * step;

packages/slider/index.wxml

@@ -2,8 +2,8 @@
 <wxs src="../wxs/style.wxs" module="style" />
 
 <view
-  class="custom-class {{ utils.bem('slider', { disabled }) }}"
-  style="{{ style({ background: inactiveColor, height: utils.addUnit(barHeight) }) }}"
+  class="custom-class {{ utils.bem('slider', { disabled, vertical }) }}"
+  style="{{ wrapperStyle }}"
   bind:tap="onClick"
 >
   <view