Question

当我在PieChartView中突出显示扇区时，扇区会更改为dataSet的highlightColor + selectionShift。然而，这种情况立即发生，我想为此转变制作动画。

目前我看到的唯一一个动画函数是ChartViewBase，它动画整个图表（这是我不想要的）。

是否只为单个（选定）扇区制作动画？

我将以下代码作为起点，但我无法将变换应用于条目或高亮

class DataBoundaryCallback(
        private val owner: LifecycleOwner,
        private val dataRequester: FetchMoreRequester,
        private val dataSourceFactory: DataSourceFactory?
) : PagedList.BoundaryCallback<IData>() {

    private var hasRequestInProgress = false

    override fun onZeroItemsLoaded() {
        requestAndSaveData()
    }

    override fun onItemAtEndLoaded(itemAtEnd: IData) {
        requestAndSaveData()
    }

    private fun requestAndSaveData() {

        if (hasRequestInProgress) return

        hasRequestInProgress = true

        // ask dataRequester to fetchMore
        // setup observer

        val cachedDataList = dataRequester.getCachedLiveData()
        val observableCachedData = cachedDataList.getLiveData()
        refreshHandler = RefreshHandler(observableCachedData)

        observableCachedData.observe(owner, refreshHandler!!) //??? TODO: how to only listen to newly posted data after starting the observe?  DOC: 'If LiveData already has data set, it will be delivered to the observer.'

        // fetchMore
        val didFetch = dataRequester.fetchMore()
        if (!didFetch) {  //not stated fetch
            hasRequestInProgress = false
            observableCachedData.removeObserver(refreshHandler!!)
        }
    }

    var refreshHandler : RefreshHandler? = null
    inner class RefreshHandler(val observableCachedData: MutableLiveData<List<Data>>) : Observer<List<Data>> {
        override fun onChanged(datalist: List<Data>?) {
            observableCachedData.removeObserver(refreshHandler!!)
            val dataSource = dataSourceFactory.getPositionalDataSource()

            // to start a new PagedList and DataSource pair flow
            // and trigger the DataSource's loadInitial()
            dataSource.invalidate()
        }
    }
}

Answer 1

你有没有试过动画选择值下面的属性？

self.pieChart.highlightPerTapEnabled = true

选中此项可能有助于在突出显示时制作动画。

如何为图表库突出显示PieChart扇区的动画？

1 个答案: