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Merge pull request #42 from jtmcn/beta
Update master to latest beta
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142 changes: 142 additions & 0 deletions
142
app/src/main/java/com/github/takahirom/webview_in_coodinator_layout/NestedWebView.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| /* | ||
| * Copyright (C) 2015 takahirom | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.github.takahirom.webview_in_coodinator_layout; | ||
|
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| import android.content.Context; | ||
| import android.support.v4.view.MotionEventCompat; | ||
| import android.support.v4.view.NestedScrollingChild; | ||
| import android.support.v4.view.NestedScrollingChildHelper; | ||
| import android.support.v4.view.ViewCompat; | ||
| import android.util.AttributeSet; | ||
| import android.view.MotionEvent; | ||
| import android.webkit.WebView; | ||
|
|
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| public class NestedWebView extends WebView implements NestedScrollingChild { | ||
| private final int[] mScrollOffset = new int[2]; | ||
| private final int[] mScrollConsumed = new int[2]; | ||
| private int mLastY; | ||
| private int mNestedOffsetY; | ||
| private NestedScrollingChildHelper mChildHelper; | ||
|
|
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| public NestedWebView(Context context) { | ||
| this(context, null); | ||
| } | ||
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| public NestedWebView(Context context, AttributeSet attrs) { | ||
| this(context, attrs, android.R.attr.webViewStyle); | ||
| } | ||
|
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| public NestedWebView(Context context, AttributeSet attrs, int defStyleAttr) { | ||
| super(context, attrs, defStyleAttr); | ||
| mChildHelper = new NestedScrollingChildHelper(this); | ||
| setNestedScrollingEnabled(true); | ||
| } | ||
|
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| @Override | ||
| public boolean onTouchEvent(MotionEvent ev) { | ||
| boolean returnValue = false; | ||
|
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| MotionEvent event = MotionEvent.obtain(ev); | ||
| final int action = MotionEventCompat.getActionMasked(event); | ||
| if (action == MotionEvent.ACTION_DOWN) { | ||
| mNestedOffsetY = 0; | ||
| } | ||
| int eventY = (int) event.getY(); | ||
| event.offsetLocation(0, mNestedOffsetY); | ||
| switch (action) { | ||
| case MotionEvent.ACTION_MOVE: | ||
| int deltaY = mLastY - eventY; | ||
| // NestedPreScroll | ||
| if (dispatchNestedPreScroll(0, deltaY, mScrollConsumed, mScrollOffset)) { | ||
| deltaY -= mScrollConsumed[1]; | ||
| mLastY = eventY - mScrollOffset[1]; | ||
| event.offsetLocation(0, -mScrollOffset[1]); | ||
| mNestedOffsetY += mScrollOffset[1]; | ||
| } | ||
| returnValue = super.onTouchEvent(event); | ||
|
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| // NestedScroll | ||
| if (dispatchNestedScroll(0, mScrollOffset[1], 0, deltaY, mScrollOffset)) { | ||
| event.offsetLocation(0, mScrollOffset[1]); | ||
| mNestedOffsetY += mScrollOffset[1]; | ||
| mLastY -= mScrollOffset[1]; | ||
| } | ||
| break; | ||
| case MotionEvent.ACTION_DOWN: | ||
| returnValue = super.onTouchEvent(event); | ||
| mLastY = eventY; | ||
| // start NestedScroll | ||
| startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL); | ||
| break; | ||
| case MotionEvent.ACTION_UP: | ||
| case MotionEvent.ACTION_CANCEL: | ||
| returnValue = super.onTouchEvent(event); | ||
| // end NestedScroll | ||
| stopNestedScroll(); | ||
| break; | ||
| } | ||
| return returnValue; | ||
| } | ||
|
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| @Override | ||
| public boolean isNestedScrollingEnabled() { | ||
| return mChildHelper.isNestedScrollingEnabled(); | ||
| } | ||
|
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| // Nested Scroll implements | ||
| @Override | ||
| public void setNestedScrollingEnabled(boolean enabled) { | ||
| mChildHelper.setNestedScrollingEnabled(enabled); | ||
| } | ||
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| @Override | ||
| public boolean startNestedScroll(int axes) { | ||
| return mChildHelper.startNestedScroll(axes); | ||
| } | ||
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| @Override | ||
| public void stopNestedScroll() { | ||
| mChildHelper.stopNestedScroll(); | ||
| } | ||
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| @Override | ||
| public boolean hasNestedScrollingParent() { | ||
| return mChildHelper.hasNestedScrollingParent(); | ||
| } | ||
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| @Override | ||
| public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, | ||
| int[] offsetInWindow) { | ||
| return mChildHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, offsetInWindow); | ||
| } | ||
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| @Override | ||
| public boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) { | ||
| return mChildHelper.dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow); | ||
| } | ||
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| @Override | ||
| public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) { | ||
| return mChildHelper.dispatchNestedFling(velocityX, velocityY, consumed); | ||
| } | ||
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| @Override | ||
| public boolean dispatchNestedPreFling(float velocityX, float velocityY) { | ||
| return mChildHelper.dispatchNestedPreFling(velocityX, velocityY); | ||
| } | ||
|
|
||
| } |
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