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feat: added sensitivity controller to android #802

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feat: added sensitivity controller to android #802

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11 changes: 11 additions & 0 deletions android/src/main/java/com/reactnativepagerview/PagerViewViewManagerImpl.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ package com.reactnativepagerview
import android.view.View
import androidx.viewpager2.widget.ViewPager2
import com.facebook.react.uimanager.PixelUtil
import androidx.recyclerview.widget.RecyclerView

object PagerViewViewManagerImpl {
const val NAME = "RNCViewPager"
Expand All @@ -20,6 +21,16 @@ object PagerViewViewManagerImpl {
view.setCurrentItem(selectedTab, scrollSmooth)
}

fun ViewPager2.reduceDragSensitivity(value: Int) {
val recyclerViewField = ViewPager2::class.java.getDeclaredField("mRecyclerView")
recyclerViewField.isAccessible = true
val recyclerView = recyclerViewField.get(this) as RecyclerView
val touchSlopField = RecyclerView::class.java.getDeclaredField("mTouchSlop")
touchSlopField.isAccessible = true
val touchSlop = touchSlopField.get(recyclerView) as Int
touchSlopField.set(recyclerView, touchSlop*value)
}

fun addView(host: NestedScrollableHost, child: View?, index: Int) {
if (child == null) {
return
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7 changes: 7 additions & 0 deletions android/src/paper/java/com/reactnativepagerview/PagerViewViewManager.kt
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Expand Up @@ -13,6 +13,7 @@ import com.facebook.react.uimanager.UIManagerModule
import com.facebook.react.uimanager.ViewGroupManager
import com.facebook.react.uimanager.annotations.ReactProp
import com.facebook.react.uimanager.events.EventDispatcher
import com.reactnativepagerview.PagerViewViewManagerImpl.reduceDragSensitivity
import com.reactnativepagerview.event.PageScrollEvent
import com.reactnativepagerview.event.PageScrollStateChangedEvent
import com.reactnativepagerview.event.PageSelectedEvent
Expand Down Expand Up @@ -125,6 +126,12 @@ class PagerViewViewManager : ViewGroupManager<NestedScrollableHost>() {
PagerViewViewManagerImpl.setLayoutDirection(host, value)
}

@ReactProp(name = "scrollSensitivity", defaultInt = 2)
fun setScrollSensitivity(host: NestedScrollableHost, value: Int) {
val view = PagerViewViewManagerImpl.getViewPager(host)
view.reduceDragSensitivity(value)
}

override fun getExportedCustomDirectEventTypeConstants(): MutableMap<String, Map<String, String>> {
return MapBuilder.of(
PageScrollEvent.EVENT_NAME, MapBuilder.of("registrationName", "onPageScroll"),
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3 changes: 3 additions & 0 deletions src/PagerViewNativeComponent.ts
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Expand Up @@ -22,6 +22,8 @@ export type OnPageScrollStateChangedEventData = Readonly<{
pageScrollState: 'idle' | 'dragging' | 'settling';
}>;

export type ScrollSensitivity = 2 | 3 | 4 | 5 | 6 | 7 | 8;

export interface NativeProps extends ViewProps {
scrollEnabled?: WithDefault<boolean, true>;
layoutDirection?: WithDefault<'ltr' | 'rtl', 'ltr'>;
Expand All @@ -35,6 +37,7 @@ export interface NativeProps extends ViewProps {
onPageScroll?: DirectEventHandler<OnPageScrollEventData>;
onPageSelected?: DirectEventHandler<OnPageSelectedEventData>;
onPageScrollStateChanged?: DirectEventHandler<OnPageScrollStateChangedEventData>;
scrollSensitivity?: ScrollSensitivity;
}

type PagerViewViewType = HostComponent<NativeProps>;
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