pull/2361/head
kunfei
2 years ago
parent
19722fd6c1
commit
64150d72d0
@ -1,105 +0,0 @@ |
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package io.legado.app.ui.widget.text |
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|
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import android.annotation.SuppressLint |
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import android.content.Context |
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import android.util.AttributeSet |
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import android.view.GestureDetector |
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import android.view.MotionEvent |
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import androidx.appcompat.widget.AppCompatMultiAutoCompleteTextView |
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|
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/** |
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* 嵌套滚动 MultiAutoCompleteTextView |
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*/ |
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open class NestScrollMultiAutoCompleteTextView @JvmOverloads constructor( |
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context: Context, |
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attrs: AttributeSet? = null |
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) : AppCompatMultiAutoCompleteTextView(context, attrs) { |
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|
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//是否到顶或者到底的标志 |
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private var disallowIntercept = true |
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//滑动距离的最大边界 |
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private var mOffsetHeight = 0 |
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private val gestureDetector = GestureDetector(context, |
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object : GestureDetector.SimpleOnGestureListener() { |
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override fun onDown(e: MotionEvent): Boolean { |
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disallowIntercept = true |
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return super.onDown(e) |
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} |
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override fun onScroll( |
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e1: MotionEvent, |
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e2: MotionEvent, |
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distanceX: Float, |
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distanceY: Float |
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): Boolean { |
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val y = scrollY + distanceY |
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if (y < 0 || y > mOffsetHeight) { |
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disallowIntercept = false |
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//这里触发父布局或祖父布局的滑动事件 |
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parent.requestDisallowInterceptTouchEvent(false) |
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} else { |
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disallowIntercept = true |
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} |
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return true |
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} |
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}) |
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override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) { |
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super.onMeasure(widthMeasureSpec, heightMeasureSpec) |
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initOffsetHeight() |
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} |
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|
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override fun onTextChanged( |
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text: CharSequence, |
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start: Int, |
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lengthBefore: Int, |
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lengthAfter: Int |
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) { |
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super.onTextChanged(text, start, lengthBefore, lengthAfter) |
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initOffsetHeight() |
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} |
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|
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override fun dispatchTouchEvent(event: MotionEvent): Boolean { |
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if (lineCount > maxLines) { |
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gestureDetector.onTouchEvent(event) |
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} |
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return super.dispatchTouchEvent(event) |
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} |
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@SuppressLint("ClickableViewAccessibility") |
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override fun onTouchEvent(event: MotionEvent): Boolean { |
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val result = super.onTouchEvent(event) |
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//如果是需要拦截，则再拦截，这个方法会在onScrollChanged方法之后再调用一次 |
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if (disallowIntercept && lineCount > maxLines) { |
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parent.requestDisallowInterceptTouchEvent(true) |
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} |
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return result |
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} |
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private fun initOffsetHeight() { |
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val mLayoutHeight: Int |
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//获得内容面板 |
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val mLayout = layout ?: return |
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//获得内容面板的高度 |
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mLayoutHeight = mLayout.height |
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//获取上内边距 |
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val paddingTop: Int = totalPaddingTop |
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//获取下内边距 |
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val paddingBottom: Int = totalPaddingBottom |
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//获得控件的实际高度 |
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val mHeight: Int = measuredHeight |
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//计算滑动距离的边界 |
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mOffsetHeight = mLayoutHeight + paddingTop + paddingBottom - mHeight |
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if (mOffsetHeight <= 0) { |
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scrollTo(0, 0) |
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} |
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} |
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} |
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@ -1,82 +0,0 @@ |
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package io.legado.app.ui.widget.text |
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|
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import android.annotation.SuppressLint |
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import android.content.Context |
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import android.util.AttributeSet |
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import android.view.MotionEvent |
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import androidx.appcompat.widget.AppCompatTextView |
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/** |
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* 嵌套滚动 TextView |
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*/ |
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class NestScrollTextView(context: Context, attrs: AttributeSet?) : |
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AppCompatTextView(context, attrs) { |
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//滑动距离的最大边界 |
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private var mOffsetHeight = 0 |
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//是否到顶或者到底的标志 |
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private var mBottomFlag = false |
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override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) { |
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super.onMeasure(widthMeasureSpec, heightMeasureSpec) |
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initOffsetHeight() |
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} |
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|
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override fun onTextChanged( |
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text: CharSequence, |
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start: Int, |
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lengthBefore: Int, |
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lengthAfter: Int |
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) { |
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super.onTextChanged(text, start, lengthBefore, lengthAfter) |
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initOffsetHeight() |
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} |
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private fun initOffsetHeight() { |
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val mLayoutHeight: Int |
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//获得内容面板 |
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val mLayout = layout ?: return |
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//获得内容面板的高度 |
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mLayoutHeight = mLayout.height |
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//获取上内边距 |
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val paddingTop: Int = totalPaddingTop |
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//获取下内边距 |
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val paddingBottom: Int = totalPaddingBottom |
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//获得控件的实际高度 |
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val mHeight: Int = measuredHeight |
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//计算滑动距离的边界 |
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mOffsetHeight = mLayoutHeight + paddingTop + paddingBottom - mHeight |
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if (mOffsetHeight <= 0) { |
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scrollTo(0, 0) |
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} |
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} |
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override fun dispatchTouchEvent(event: MotionEvent): Boolean { |
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if (event.action == MotionEvent.ACTION_DOWN) { |
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//如果是新的按下事件，则对mBottomFlag重新初始化 |
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mBottomFlag = mOffsetHeight <= 0 |
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} |
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return super.dispatchTouchEvent(event) |
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} |
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@SuppressLint("ClickableViewAccessibility") |
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override fun onTouchEvent(event: MotionEvent): Boolean { |
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val result = super.onTouchEvent(event) |
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//如果是需要拦截，则再拦截，这个方法会在onScrollChanged方法之后再调用一次 |
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if (!mBottomFlag) parent.requestDisallowInterceptTouchEvent(true) |
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return result |
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} |
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override fun onScrollChanged(horiz: Int, vert: Int, oldHoriz: Int, oldVert: Int) { |
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super.onScrollChanged(horiz, vert, oldHoriz, oldVert) |
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if (vert == mOffsetHeight || vert == 0) { |
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//这里触发父布局或祖父布局的滑动事件 |
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parent.requestDisallowInterceptTouchEvent(false) |
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mBottomFlag = true |
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} |
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} |
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} |
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@ -0,0 +1,272 @@ |
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package io.legado.app.ui.widget.text |
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import android.annotation.SuppressLint |
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import android.content.Context |
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import android.text.method.LinkMovementMethod |
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import android.util.AttributeSet |
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import android.view.GestureDetector |
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import android.view.MotionEvent |
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import android.view.VelocityTracker |
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import android.view.ViewConfiguration |
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import android.view.animation.Interpolator |
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import android.widget.OverScroller |
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import androidx.appcompat.widget.AppCompatMultiAutoCompleteTextView |
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import androidx.core.view.ViewCompat |
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import kotlin.math.abs |
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import kotlin.math.max |
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import kotlin.math.min |
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/** |
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* 嵌套滚动 MultiAutoCompleteTextView |
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*/ |
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open class ScrollMultiAutoCompleteTextView @JvmOverloads constructor( |
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context: Context, |
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attrs: AttributeSet? = null |
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) : AppCompatMultiAutoCompleteTextView(context, attrs) { |
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//是否到顶或者到底的标志 |
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private var disallowIntercept = true |
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private val scrollStateIdle = 0 |
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private val scrollStateDragging = 1 |
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val scrollStateSettling = 2 |
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private val mViewFling: ViewFling by lazy { ViewFling() } |
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private val velocityTracker: VelocityTracker by lazy { VelocityTracker.obtain() } |
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private var mScrollState = scrollStateIdle |
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private var mLastTouchY: Int = 0 |
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private var mTouchSlop: Int = 0 |
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private var mMinFlingVelocity: Int = 0 |
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private var mMaxFlingVelocity: Int = 0 |
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//滑动距离的最大边界 |
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private var mOffsetHeight: Int = 0 |
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//f(x) = (x-1)^5 + 1 |
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private val sQuinticInterpolator = Interpolator { |
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var t = it |
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t -= 1.0f |
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t * t * t * t * t + 1.0f |
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} |
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private val gestureDetector = GestureDetector(context, |
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object : GestureDetector.SimpleOnGestureListener() { |
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override fun onDown(e: MotionEvent): Boolean { |
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disallowIntercept = true |
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return super.onDown(e) |
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} |
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override fun onScroll( |
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e1: MotionEvent, |
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e2: MotionEvent, |
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distanceX: Float, |
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distanceY: Float |
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): Boolean { |
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val y = scrollY + distanceY |
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if (y < 0 || y > mOffsetHeight) { |
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disallowIntercept = false |
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//这里触发父布局或祖父布局的滑动事件 |
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parent.requestDisallowInterceptTouchEvent(false) |
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} else { |
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disallowIntercept = true |
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} |
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return true |
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} |
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}) |
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init { |
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val vc = ViewConfiguration.get(context) |
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mTouchSlop = vc.scaledTouchSlop |
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mMinFlingVelocity = vc.scaledMinimumFlingVelocity |
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mMaxFlingVelocity = vc.scaledMaximumFlingVelocity |
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movementMethod = LinkMovementMethod.getInstance() |
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} |
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override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) { |
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super.onMeasure(widthMeasureSpec, heightMeasureSpec) |
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initOffsetHeight() |
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} |
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override fun onTextChanged( |
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text: CharSequence, |
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start: Int, |
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lengthBefore: Int, |
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lengthAfter: Int |
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) { |
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super.onTextChanged(text, start, lengthBefore, lengthAfter) |
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initOffsetHeight() |
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} |
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override fun dispatchTouchEvent(event: MotionEvent): Boolean { |
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if (lineCount > maxLines) { |
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gestureDetector.onTouchEvent(event) |
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} |
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velocityTracker.addMovement(event) |
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when (event.action) { |
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MotionEvent.ACTION_DOWN -> { |
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setScrollState(scrollStateIdle) |
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mLastTouchY = (event.y + 0.5f).toInt() |
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} |
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MotionEvent.ACTION_MOVE -> { |
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val y = (event.y + 0.5f).toInt() |
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var dy = mLastTouchY - y |
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if (mScrollState != scrollStateDragging) { |
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var startScroll = false |
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if (abs(dy) > mTouchSlop) { |
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if (dy > 0) { |
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dy -= mTouchSlop |
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} else { |
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dy += mTouchSlop |
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} |
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startScroll = true |
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} |
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if (startScroll) { |
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setScrollState(scrollStateDragging) |
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} |
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} |
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if (mScrollState == scrollStateDragging) { |
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mLastTouchY = y |
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} |
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} |
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MotionEvent.ACTION_UP -> { |
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velocityTracker.computeCurrentVelocity(1000, mMaxFlingVelocity.toFloat()) |
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val yVelocity = velocityTracker.yVelocity |
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if (abs(yVelocity) > mMinFlingVelocity) { |
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mViewFling.fling(-yVelocity.toInt()) |
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} else { |
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setScrollState(scrollStateIdle) |
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} |
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resetTouch() |
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} |
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MotionEvent.ACTION_CANCEL -> { |
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resetTouch() |
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} |
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} |
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return super.dispatchTouchEvent(event) |
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} |
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|
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@SuppressLint("ClickableViewAccessibility") |
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override fun onTouchEvent(event: MotionEvent): Boolean { |
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val result = super.onTouchEvent(event) |
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//如果是需要拦截，则再拦截，这个方法会在onScrollChanged方法之后再调用一次 |
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if (disallowIntercept && lineCount > maxLines) { |
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parent.requestDisallowInterceptTouchEvent(true) |
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} |
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return result |
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} |
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override fun scrollTo(x: Int, y: Int) { |
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super.scrollTo(x, min(y, mOffsetHeight)) |
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} |
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private fun initOffsetHeight() { |
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val mLayoutHeight: Int |
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|
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//获得内容面板 |
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val mLayout = layout ?: return |
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//获得内容面板的高度 |
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mLayoutHeight = mLayout.height |
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//获取上内边距 |
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val paddingTop: Int = totalPaddingTop |
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//获取下内边距 |
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val paddingBottom: Int = totalPaddingBottom |
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|
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//获得控件的实际高度 |
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val mHeight: Int = measuredHeight |
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|
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//计算滑动距离的边界 |
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mOffsetHeight = mLayoutHeight + paddingTop + paddingBottom - mHeight |
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if (mOffsetHeight <= 0) { |
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scrollTo(0, 0) |
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} |
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} |
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private fun resetTouch() { |
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velocityTracker.clear() |
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} |
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private fun setScrollState(state: Int) { |
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if (state == mScrollState) { |
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return |
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} |
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mScrollState = state |
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if (state != scrollStateSettling) { |
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mViewFling.stop() |
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} |
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} |
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/** |
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* 惯性滚动 |
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*/ |
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private inner class ViewFling : Runnable { |
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private var mLastFlingY = 0 |
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private val mScroller: OverScroller = OverScroller(context, sQuinticInterpolator) |
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private var mEatRunOnAnimationRequest = false |
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private var mReSchedulePostAnimationCallback = false |
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override fun run() { |
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disableRunOnAnimationRequests() |
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val scroller = mScroller |
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if (scroller.computeScrollOffset()) { |
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val y = scroller.currY |
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val dy = y - mLastFlingY |
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mLastFlingY = y |
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if (dy < 0 && scrollY > 0) { |
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scrollBy(0, max(dy, -scrollY)) |
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} else if (dy > 0 && scrollY < mOffsetHeight) { |
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scrollBy(0, min(dy, mOffsetHeight - scrollY)) |
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} |
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postOnAnimation() |
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} |
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enableRunOnAnimationRequests() |
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} |
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fun fling(velocityY: Int) { |
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mLastFlingY = 0 |
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setScrollState(scrollStateSettling) |
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mScroller.fling( |
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0, |
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0, |
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0, |
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velocityY, |
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Integer.MIN_VALUE, |
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Integer.MAX_VALUE, |
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Integer.MIN_VALUE, |
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Integer.MAX_VALUE |
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) |
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postOnAnimation() |
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} |
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fun stop() { |
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removeCallbacks(this) |
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mScroller.abortAnimation() |
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} |
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private fun disableRunOnAnimationRequests() { |
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mReSchedulePostAnimationCallback = false |
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mEatRunOnAnimationRequest = true |
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} |
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private fun enableRunOnAnimationRequests() { |
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mEatRunOnAnimationRequest = false |
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if (mReSchedulePostAnimationCallback) { |
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postOnAnimation() |
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} |
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} |
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fun postOnAnimation() { |
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if (mEatRunOnAnimationRequest) { |
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mReSchedulePostAnimationCallback = true |
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} else { |
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removeCallbacks(this) |
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ViewCompat.postOnAnimation(this@ScrollMultiAutoCompleteTextView, this) |
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} |
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} |
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} |
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} |
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