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AndroidView時代のコードと比較
NestedWebViewの実装(簡略化する)
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}
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AndroidView時代のコードと比較
NestedScrollingChildを実装する
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}
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AndroidView時代のコードと比較
NestedScrollingChildHelperを介してイベントを送る
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}
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AndroidView時代のコードと比較
ACTION_DOWNでネストスクロールを開始する
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}
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AndroidView時代のコードと比較
ネストスクロールを有効化 / 確認
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}
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AndroidView時代のコードと比較
NestedScrollConnectionと同様にスクロール量を送る
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}
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AndroidView時代のコードと比較
ACTION_UP / ACTION_CANCELでスクロールを終了する
class NestedWebView (...) : WebView, NestedScrollingChild {
private val mChildHelper = NestedScrollingChildHelper(this)
override fun onTouchEvent(...): Boolean {...}
override fun setNestedScrollingEnabled(...) {...}
override fun isNestedScrollingEnabled(...): Boolean {...}
override fun startNestedScroll(...): Boolean {...}
override fun stopNestedScroll(...) {...}
override fun hasNestedScrollingParent(...): Boolean {...}
override fun dispatchNestedScroll(...): Boolean {...}
override fun dispatchNestedPreScroll(...): Boolean {...}
override fun dispatchNestedFling(...): Boolean {...
override fun dispatchNestedPreFling(...): Boolean {...}
}