# ArkUI Subsystem Changelog
## cl.arkui.1 Changes in the Default QR Code Color, Background Color, and Size

**Access Level**

Public

**Reason for Change**

The default color and size of the **\<QRCode>** component do not comply with the UX specifications.

**Change Impact**

This change is a compatible change. It delivers a more visually appealing component.

**API Level**

7

**Key API/Component Changes**

In versions earlier than API version 11, the **\<QRCode>** component uses the following default settings: color: **Color.Black**; background color: **Color.White**; width and height: same as the parent component.

![qrcode](figures/qrcodeApi10.png)

Since API version 11, the **\<QRCode>** component uses the following default settings: color: **ohos_id_color_foreground**; background color: **ohos_id_color_background**; width and height: 240 vp.

![qrcode](figures/qrcodeApi11.png)

**Adaptation Guide**

For details, see [QRCode](../../../application-dev/reference/apis-arkui/arkui-ts/ts-basic-components-qrcode.md).

Sample code:
```ts
// xxx.ets
@Entry
@Component
struct QRCodeExample {
  private value: string = 'hello world'
  build() {
    Column() {
      QRCode(this.value)
    }.width('100%').height('100%')
  }
}
```
## cl.arkui.2 Changes to the \<Refresh> Component

**Access Level**

Public

**Reason for Change**

The UI specifications are changed to bring about UX enhancement.

**Change Impact**

1. Default refresh settings

In versions earlier than API version 11, child components of the **\<Refresh>** component do not move down with the pull-down gesture, and the edge bounce effect of the component is independent of the loading.

![refresh](figures/refreshApi9Default.gif)

Since API version 11, child components of the **\<Refresh>** component move down with the pull-down gesture.

![refresh](figures/refreshApi11Default.gif)

2. Custom refresh settings with the builder API

In versions earlier than API version 11, the **\<Refresh>** component is embedded with child components, with a height not greater than 64 vp. The edge bounce effect of the scrolling component and the custom refresh style for the pull-down gesture take effect at the same time.

![refresh](figures/refreshApi9Builder.gif)

Since API version 11, child components of the **\<Refresh>** component move down with the pull-down gesture. There are no constraints on the height of the custom refresh component with the builder API.

![refresh](figures/refreshApi11Builder.gif)

3. **friction** API

In versions earlier than API version 11, the **\<Refresh>** component's sensitivity to the pull-down gesture is set through the **friction** API.
Since API version 11, the **\<Refresh>** component's sensitivity to the pull-down gesture decreases with the pull-down gesture. The **friction** API has no effect.

4. **offset** API

In versions earlier than API version 11, the pull-down distance required for the **\<loadingProgress>** component to start to display is set through the **offset** API of the **\<Refresh>** component.
Since API version 11, the pull-down distance required for the **\<loadingProgress>** component to start to display is fixed at 16 vp. The **friction** API has no effect.

**API Level**

8

**Change Since**

OpenHarmony SDK 4.1.2.2

**Key API/Component Changes**

Refresh

**Adaptation Guide**

1. Default refresh settings

For details, see [Refresh](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-refresh.md).

Sample code:

```ts
@Entry
@Component
struct RefreshExample {
  @State isRefreshing: boolean = false
  @State arr: String[] = ['0', '1', '2', '3', '4','5','6','7','8','9','10']

  build() {
    Column() {
      Refresh({ refreshing: $$this.isRefreshing}) {
        List() {
          ForEach(this.arr, (item: string) => {
            ListItem() {
              Text('' + item)
                .width('100%').height(100).fontSize(16)
                .textAlign(TextAlign.Center).borderRadius(10).backgroundColor(0xFFFFFF)
            }
          }, (item: string) => item)
        }
        .onScrollIndex((first: number) => {
          console.info(first.toString())
        })
        .width('100%')
        .height('100%')
        .divider({strokeWidth:1,color:Color.Yellow,startMargin:10,endMargin:10})
        .scrollBar(BarState.Off)
        .backgroundColor(Color.Yellow)
      }
      .onStateChange((refreshStatus: RefreshStatus) => {
        console.info('Refresh onStatueChange state is ' + refreshStatus)
      })
      .onRefreshing(() => {
        setTimeout(() => {
          this.isRefreshing = false
        }, 2000)
        console.log('onRefreshing test')
      })
      .backgroundColor(0x89CFF0)
    }
  }
}
```

2. Custom refresh settings with the builder API

For details, see [Refresh](../../../application-dev/reference/apis-arkui/arkui-ts/ts-container-refresh.md).

Sample code:

```ts
// xxx.ets
@Entry
@Component
struct RefreshExample {
  @State isRefreshing: boolean = false
  @State arr: String[] = ['0', '1', '2', '3', '4','5','6','7','8','9','10']
  @Builder
  customRefreshComponent()
  {
    Stack()
    {
      Row()
      {
        LoadingProgress().height(32)
        Text("Refreshing...").fontSize(16).margin({left:20})
      }
      .alignItems(VerticalAlign.Center)
    }.width("100%").align(Alignment.Center)
  }

  build() {
    Column() {
      Refresh({ refreshing: $$this.isRefreshing,builder:this.customRefreshComponent()}) {
        List() {
          ForEach(this.arr, (item: string) => {
            ListItem() {
              Text('' + item)
                .width('100%').height(100).fontSize(16)
                .textAlign(TextAlign.Center).borderRadius(10).backgroundColor(0xFFFFFF)
            }
          }, (item: string) => item)
        }
        .onScrollIndex((first: number) => {
          console.info(first.toString())
        })
        .width('100%')
        .height('100%')
        .divider({strokeWidth:1,color:Color.Yellow,startMargin:10,endMargin:10})
        .scrollBar(BarState.Off)
        .backgroundColor(Color.Yellow)
      }
      .onStateChange((refreshStatus: RefreshStatus) => {
        console.info('Refresh onStatueChange state is ' + refreshStatus)
      })
      .onRefreshing(() => {
        setTimeout(() => {
          this.isRefreshing = false
        }, 2000)
        console.log('onRefreshing test')
      })
      .backgroundColor(0x89CFF0)
    }
  }
}
```

3. **friction** and **offset** APIs

No adaptation is required.