Slide 1
Slide 1 text
相互運用上の注意点
NestedScrollInteropConnectionは何をしているのか？
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(...)
return toOffset(consumedScrollCache, available)
}
}
Slide 2
Slide 2 text
相互運用上の注意点
NestedScrollConnectionを実装
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(...)
return toOffset(consumedScrollCache, available)
}
}
Slide 3
Slide 3 text
相互運用上の注意点
AndroidView同様にHelperクラスを介する
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(...)
return toOffset(consumedScrollCache, available)
}
}
Slide 4
Slide 4 text
相互運用上の注意点
スクロールする前の制御
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(...)
return toOffset(consumedScrollCache, available)
}
}
Slide 5
Slide 5 text
相互運用上の注意点
ネストスクロールができるか確認
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(...)
return toOffset(consumedScrollCache, available)
}
}
Slide 6
Slide 6 text
相互運用上の注意点
親にスクロール消費量を送る
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(...)
return toOffset(consumedScrollCache, available)
}
}
Slide 7
Slide 7 text
相互運用上の注意点
スクロール消費量と消費されなかった量を送る
internal class NestedScrollInteropConnection(...) : NestedScrollConnection() {
private val nestedScrollChildHelper = NestedScrollingChildHelper(...)
...
override fun onPreScroll(...): Offset {
if(nestedScrollChildHelper.startNestedScroll(...)) {
...
nestedScrollChildHelper.dispatchNestedScroll(
composeToViewOffset(consumed.x),
composeToViewOffset(consumed.y),
composeToViewOffset(available.x),
composeToViewOffset(available.y),
...
)