package cn.sinata.xldutils.fragment
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import android.os.Bundle
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import androidx.core.content.ContextCompat
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import android.util.TypedValue
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import android.view.Gravity
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import android.view.View
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import android.widget.FrameLayout
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import android.widget.LinearLayout
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import android.widget.TextView
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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import cn.sinata.xldutils.R
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import cn.sinata.xldutils.adapter.HFRecyclerAdapter
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import cn.sinata.xldutils.sysErr
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import cn.sinata.xldutils.view.SwipeRefreshRecyclerLayout
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import org.jetbrains.anko.support.v4.find
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import org.jetbrains.anko.textColor
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import org.jetbrains.anko.wrapContent
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import kotlin.properties.Delegates
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/**
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* RecyclerView的fragment
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*/
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abstract class RecyclerFragment() : BaseFragment() {
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/**
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*
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* 如果使用在viewpager等只回收view不回收数据的控件内，这里不能是用by lazy和val ，会导致该声明的既不能重新赋值，也指向错误的view地址，从而出现未知bug。
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* 如：RecyclerView: No adapter attached; skipping layout Error
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*/
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var mSwipeRefreshLayout by Delegates.notNull<SwipeRefreshRecyclerLayout>()
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protected open var rootFl by Delegates.notNull<FrameLayout>()
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protected open var rootLayout by Delegates.notNull<LinearLayout>()
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override fun contentViewId(): Int = R.layout.base_recyclerview_layout
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private var emptyView: TextView? = null
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protected var adapter : RecyclerView.Adapter<*>? = null
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protected abstract fun setAdapter(): RecyclerView.Adapter<*>
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/**
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* 下拉刷新
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*/
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protected open fun pullDownRefresh() {}
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/**
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* 加载更多
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*/
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protected open fun loadMore() {}
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/**
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* @return 默认上拉下拉同时存在
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*/
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open fun getMode(): SwipeRefreshRecyclerLayout.Mode {
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return SwipeRefreshRecyclerLayout.Mode.Both
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}
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/**
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* @return 默认垂直布局。
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*/
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open fun getLayoutManager(): RecyclerView.LayoutManager {
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return LinearLayoutManager(context, LinearLayoutManager.VERTICAL,false)
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}
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
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super.onViewCreated(view, savedInstanceState)
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rootLayout = find(R.id.root_layout)
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rootFl = find(R.id.root_layout)
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mSwipeRefreshLayout = find(R.id.swipeRefreshLayout)
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sysErr("---getLayoutManager()--->"+getLayoutManager())
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mSwipeRefreshLayout.setLayoutManager(getLayoutManager())
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mSwipeRefreshLayout.setOnRefreshListener(object : SwipeRefreshRecyclerLayout.OnRefreshListener {
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override fun onRefresh() {
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pullDownRefresh()
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}
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override fun onLoadMore() {
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loadMore()
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}
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})
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mSwipeRefreshLayout.setMode(getMode())
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adapter = setAdapter()
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mSwipeRefreshLayout.setAdapter(adapter)
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mSwipeRefreshLayout.isRefreshing = false
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}
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override fun onDestroyView() {
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super.onDestroyView()
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try {
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adapter!!.unregisterAdapterDataObserver(observer)
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} catch (e: Exception) {
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}
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//同步置空view
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emptyView = null
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}
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protected fun addEmptyView(text:String,leftRes:Int=0,topRes:Int=0,rightRes:Int=0,bottomRes:Int=0) {
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if (emptyView == null) {
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emptyView = TextView(context)
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val lp = FrameLayout.LayoutParams(wrapContent, wrapContent)
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lp.gravity = Gravity.CENTER
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emptyView!!.layoutParams = lp
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emptyView!!.gravity = Gravity.CENTER
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emptyView!!.textColor = ContextCompat.getColor(context!!,R.color.textColor99)
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emptyView!!.setTextSize(TypedValue.COMPLEX_UNIT_SP,16f)
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emptyView!!.setCompoundDrawablesWithIntrinsicBounds(leftRes,topRes,rightRes,bottomRes)
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rootFl.addView(emptyView,0)
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if (adapter != null) {
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adapter!!.registerAdapterDataObserver(observer)
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toggleEmptyView()
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}
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}
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emptyView!!.text = text
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}
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private val observer:RecyclerView.AdapterDataObserver = object :RecyclerView.AdapterDataObserver(){
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override fun onChanged() {
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super.onChanged()
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toggleEmptyView()
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}
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}
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private fun toggleEmptyView() {
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var count = adapter!!.itemCount
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if (adapter is HFRecyclerAdapter<*>) {
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count = (adapter as HFRecyclerAdapter<*>).getDataItemCount()
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}
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if (emptyView != null) {
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if (count > 0) {
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emptyView!!.visibility = View.GONE
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} else {
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emptyView!!.visibility = View.VISIBLE
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}
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}
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}
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/**
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* 设置刷新状态
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* @param refreshing 刷新状态
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*/
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fun setRefreshing(refreshing: Boolean) {
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mSwipeRefreshLayout.isRefreshing = refreshing
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}
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}
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