100 lines
3.7 KiB
Kotlin
100 lines
3.7 KiB
Kotlin
package jp.juggler.subwaytooter.actmain
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import android.view.Gravity
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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import jp.juggler.subwaytooter.ActMain
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import jp.juggler.subwaytooter.column.Column
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import jp.juggler.subwaytooter.pref.PrefB
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import jp.juggler.subwaytooter.view.GravitySnapHelper
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import jp.juggler.util.data.clip
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import kotlin.math.abs
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import kotlin.math.min
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class ActMainTabletViews(val actMain: ActMain) {
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internal lateinit var tabletPager: RecyclerView
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internal lateinit var tabletPagerAdapter: TabletColumnPagerAdapter
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internal lateinit var tabletLayoutManager: LinearLayoutManager
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val visibleColumnsIndices: IntRange
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get() {
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var vs = tabletLayoutManager.findFirstVisibleItemPosition()
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var ve = tabletLayoutManager.findLastVisibleItemPosition()
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if (vs == RecyclerView.NO_POSITION || ve == RecyclerView.NO_POSITION) {
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return IntRange(-1, -2) // empty and less than zero
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}
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val child = tabletLayoutManager.findViewByPosition(vs)
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val slideRatio =
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abs((child?.left ?: 0) / actMain.nColumnWidth.toFloat()).clip(0f, 1f)
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if (slideRatio >= 0.95f) {
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++vs
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++ve
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}
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return IntRange(vs, min(ve, vs + actMain.nScreenColumn - 1))
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}
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val visibleColumns: List<Column>
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get() {
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val list = actMain.appState.columnList
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return visibleColumnsIndices.mapNotNull { list.elementAtOrNull(it) }
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}
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fun initUI(tmpTabletPager: RecyclerView) {
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this.tabletPager = tmpTabletPager
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this.tabletPagerAdapter = TabletColumnPagerAdapter(actMain)
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this.tabletLayoutManager =
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LinearLayoutManager(
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actMain,
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LinearLayoutManager.HORIZONTAL,
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false
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)
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if (this.tabletPager.itemDecorationCount == 0) {
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this.tabletPager.addItemDecoration(TabletColumnDivider(actMain))
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}
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this.tabletPager.adapter = this.tabletPagerAdapter
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this.tabletPager.layoutManager = this.tabletLayoutManager
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this.tabletPager.addOnScrollListener(object :
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RecyclerView.OnScrollListener() {
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override fun onScrollStateChanged(
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recyclerView: RecyclerView,
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newState: Int,
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) {
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super.onScrollStateChanged(recyclerView, newState)
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val vs = tabletLayoutManager.findFirstVisibleItemPosition()
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val ve = tabletLayoutManager.findLastVisibleItemPosition()
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// 端に近い方に合わせる
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val distance_left = abs(vs)
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val distance_right = abs(actMain.appState.columnCount - 1 - ve)
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if (distance_left < distance_right) {
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actMain.scrollColumnStrip(vs)
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} else {
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actMain.scrollColumnStrip(ve)
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}
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}
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override fun onScrolled(
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recyclerView: RecyclerView,
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dx: Int,
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dy: Int,
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) {
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super.onScrolled(recyclerView, dx, dy)
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actMain.updateColumnStripSelection(-1, -1f)
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}
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})
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this.tabletPager.itemAnimator = null
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// val animator = this.tablet_pager.itemAnimator
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// if( animator is DefaultItemAnimator){
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// animator.supportsChangeAnimations = false
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// }
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if (PrefB.bpTabletSnap.value) {
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GravitySnapHelper(Gravity.START).attachToRecyclerView(this.tabletPager)
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}
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}
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}
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